Answers
Answer: IT IS C TRUST ME DID IT
Explanation: OK BYE GOOD LUCK
Related Questions
the use of solar energy should be increase in the context of Nepal.justify the statement
Answers
Answer:
The solar potential in Nepal is 50,000 terawatt-hours per year, which is 100 times larger than Nepal's hydro resource and 7,000 times larger than Nepal's current electricity consumption. Solar can easily meet all future energy needs in Nepal. Solar energy is cheaper than fossil fuels, nuclear and hydro.
Can anyone please help me answer this question?
Answers
Two particles A and B move into the region between charged parallel plates, A is an electron and B is a proton. Thus, option D is correct.
The electric field between the charged conductors is obtained by the ratio of potential difference and distance between two plates. When the plates are connected to a battery, one plate acquires a positive charge and another plate acquires a negative charge. The electric field lines pass from positive to negative plates.
From the given diagram, the field lines pass from the positive to the negative plate. Unlike charges are attract each other. The particle A attracts towards the positive plate and hence it is the electron. The particle B attracts towards the negative plate and hence it is a proton.
Thus, the ideal solution is option D.
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__5. The study of weather patterns can predict the trajectory and intensity of this
event via satellite imagery.
A. Hurricanes
B. Tornadoes
C. Floods
D. Forest fires
Answers
Answer:
its hurricane
Explanation:
beacuse almost all the time hurricanes cause alot of trajectory in the compasses and weather maps
The study of weather patterns can predict the trajectory and intensity of hurricanes. So, option A.
What is meant by weather ?The state of the atmosphere, which includes factors such as temperature, air pressure, wind, humidity, precipitation, and cloud cover, is referred to as the weather.
Here,
Weather condition is the local climate over a specific time period, which might range from one to several weeks. Meteorological conditions are those that are characteristic for a certain place or seasons.
The study of weather and atmospheric patterns across time is known as climatology. This branch of science is devoted to observing, examining, and comprehending global weather patterns, as well as the atmospheric circumstances that lead to them.
The atmosphere's current condition can be determined by combining data from weather stations, satellites, and even data collected by aircraft.
Following that, meteorologists use what they know about atmospheric processes to predict how the atmosphere will change, so altering the weather.
Hence,
The study of weather patterns can predict the trajectory and intensity of hurricanes. So, option A.
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Komal found that her vial of isopropyl alcohol showed a much better surface
tension bubble shape (a higher bubble) than her vial of water. Her peer group
suggested some experimental errors that may have caused this to happen.
Which three experimental errors are most likely to have occurred?
Answers
Answer:
A B C
Explanation:just took the test
Answer:
Komal could have mixed up the labels on the vials.
Someone might have jiggled the table and made the water surface tension bubble spill over.
The water could actually have been saltwater instead of pure water.
Explanation:
...........................
Find distance between two object of radius 6 cm and 2 cm
Answers
The distance between two objects of radius 6 cm and 2 cm is zero
To find the distance between two objects with radii of 6 cm and 2 cm, we need to consider the center-to-center distance between the objects and subtract the sum of their radii.
Let's denote the radii of the objects as r1 = 6 cm and r2 = 2 cm.
The distance between the centers of the objects can be represented as d = r1 + r2. Adding the radii ensures that we account for the space occupied by both objects.
Substituting the values, we have d = 6 cm + 2 cm = 8 cm.
Now, to find the actual distance between the objects, we subtract the sum of their radii from the center-to-center distance:
Distance = d - (r1 + r2) = 8 cm - (6 cm + 2 cm) = 8 cm - 8 cm = 0 cm.
The resulting distance is 0 cm, indicating that the objects are in direct contact with each other. This means that their surfaces are touching. When the distance between two objects is zero, it implies that they are overlapping or in physical contact. In this case, since the distance is equal to 0 cm, the two objects are touching each other, with their surfaces coming into contact.
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Do you feel cold after coming out from swimming pool
Answers
The sensation of feeling cold after coming out of a swimming pool can be attributed to evaporation, conduction, individual sensitivity.
The several factors are
Firstly, water conducts heat away from the body more efficiently than air. When you are in the pool, the water absorbs heat from your body, causing you to lose heat through conduction. This lowers your body temperature, and when you step out of the water into the air, the temperature difference between your body and the surrounding environment can feel more pronounced, resulting in a sensation of coldness.
Secondly, evaporation plays a role in cooling down the body. As water evaporates from your skin's surface, it takes heat away from your body, creating a cooling effect. When you exit the pool, the moisture on your skin evaporates more rapidly in the drier air, further intensifying the cooling sensation.
Additionally, wet clothing can contribute to the feeling of coldness. Wet fabric against the skin facilitates heat transfer and can make you feel colder than if you were dry.
The perception of coldness after swimming can also be influenced by personal factors such as individual sensitivity to temperature changes, the duration of time spent in the water, and the temperature of the pool itself.
To mitigate the feeling of coldness after swimming, it is advisable to dry off and change into dry clothing promptly. Wrapping yourself in a towel or using a robe can help retain body heat. Additionally, engaging in light physical activity or seeking warmer sheltered areas can help generate body heat and alleviate the sensation of coldness.
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A wave moving with a speed of 20 m/s has a frequency of 10 Hz. What is the wavelength of the wave?A. 0.5 mB. 30 mC. 200 mD. 2 m
Answers
In order to calculate the wavelength of the wave, use the following formula:
\(v=\lambda f\)where:
λ: wavelength = ?
v: speed of the wave = 20 m/s
f: frequency = 10 Hz
solve the equation above for λ and replace the values of v and f:
\(\lambda=\frac{v}{f}=\frac{20m\text{ /s}}{10Hz}=2m\)Hence, the wavelength of the wave is 2 m
All of the following are examples of positive direction except:
Right
North
East
South
Answers
Answer:
right
Explanation:
think of a compass theres N.E.S.W north, east, south, west
03: Hook's law suggests that F is directly proportional to -x, how much true you have found this statement in your experiment? Explain any differences.
Answers
Hooke's Law can be given as follows sometimes:
The restoring force of a spring is equal to the spring constant multiplied by the displacement from its normal position:
F = -kx
Where, F = Restoring force of a spring (Newtons, N)
k = Spring constant (N/m)
x = Displacement of the spring (m)
The negative sign relates to the direction of the applied force and by convention, the minus or negative sign is present in F = -kx. The restoring force F is directly proportional to the displacement (x), according to Hooke's law. When the spring is compressed, the displacement (x) is negative. It is zero when the spring is at its original length and positive when the spring is extended.
Practically, Hooke's Law is applicable only within a limited frame of reference, and through experimenting, this statement proves to be true. Because materials cannot be compressed beyond a certain size or expanded beyond a certain size without some permanent deformation or change of their original state.
The law only applies under some conditions such as a limited amount of force or deformation. Factually, many materials will noticeably deviate from Hooke's law even before those elastic limits are reached.
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Which of these statements is true?
a) Neither (a) nor (b) is true.
b) Both (a) and (b) are true.
c) Electric current is stored in the battery of a circuit.
d) Electric current is the flow of electrons in a circuit.
Answers
Answer:
d electric current is the flow of electrons in a circuit
I'm not sure about how can solve this problem. Please help me!!
Answers
The magnitude of the power dissipated in resistor R4 is approximately 10,028 watts.
How to find magnitude?To find the power dissipated in resistor R4, use the formula:
P = I² × R
where P = power, I = current flowing through the resistor, and R = resistance of the resistor.
The total resistance, Rt, can be calculated using the formula:
1/Rt = 1/R1 + 1/R2 + 1/R3
Substituting the given values:
1/Rt = 1/3 + 1/0.8 + 1/2
Simplifying the equation:
1/Rt ≈ 1.6667
Rt ≈ 0.6 Ω
Next, calculate the total voltage, Vt, by summing the individual voltage sources:
Vt = ε1 + ε2 + ε3
Substituting the given values:
Vt = 9 + 6 + 4
Vt = 19 V
Now calculate the current flowing through resistor R4 using Ohm's Law:
I = Vt / Rt
Substituting the calculated values:
I = 19 / 0.6
I ≈ 31.6667 A
Finally, calculate the power dissipated in resistor R4:
P = I² × R4
Substituting the calculated values:
P = (31.6667)² × 10
P ≈ 10,028 W
Therefore, the magnitude of the power dissipated in resistor R4 is approximately 10,028 watts.
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Water flows at a speed of 13 m/s through a pipe that has a diameter of 1.2 m. What is the
diameter of the smaller end of the pipe that the water comes out with a speed of 30 m/s?
Answers
The diameter of the smaller end of the pipe is approximately 0.78 meters.
To determine the diameter of the smaller end of the pipe, we can use the principle of conservation of mass. According to this principle, the mass flow rate of water should remain constant throughout the pipe.
The mass flow rate is given by the equation:
Mass flow rate = density of water * cross-sectional area * velocity
Since the density of the water remains constant, we can write:
Cross-sectional area1 * velocity1 = Cross-sectional area2 * velocity2
Given that the velocity1 is 13 m/s, the diameter1 is 1.2 m, and the velocity2 is 30 m/s, we can solve for the diameter2 using the equation:
(pi * (diameter1/2)^2) * velocity1 = (pi * (diameter2/2)^2) * velocity2
Simplifying the equation:
(1.2/2)^2 * 13 = (diameter2/2)^2 * 30
Calculating the equation:
(0.6)^2 * 13 = (diameter2/2)^2 * 30
0.36 * 13 = (diameter2/2)^2 * 30
4.68 = (diameter2/2)^2 * 30
Dividing both sides by 30:
0.156 = (diameter2/2)^2
Taking the square root of both sides:
0.39 = diameter2/2
Multiplying both sides by 2:
0.78 = diameter2
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How is recall measured in LTM retention?
Recall requires subjects to generate information on their own. The two types of recall are cued recall (fill-in-the-blank) and free recall (no cue).
Answers
Recall is a method used for measuring retention which involves the verbal reproduction or repetition of learnt material.
Recall is a technique for gauging retention that entails repeating verbatim what has been learned. Basically, it comes in two varieties: serial recall and free recall. In serial recall, previously learned material is frequently repeated in the order in which it was first learned or after a predetermined order. Many of us can only remember certain information in a specific order. For instance, we can't immediately find a name in the phone book or a word in the dictionary that starts with "Res-."
As we turn the pages, we mentally recite the alphabet from A to R, making sure that R comes after the letters O, P, and Q and before the letters S, T, and so on. Similar to this, there are those
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2. What is the resistance expected on a heater that is feed by 480V AC and the Electric Power is 4.6kW?
Answers
The resistance expected of the heater is 50.1 ohms.
What is resistance?Resistance can be defined as the opposition to the flow of electric current in an electric circuit. The S.I unit of resistance is Ohms (Ω).
To calculate the resistance of the heater, we use the formula below.
Formula:R = V²/P............. Equation 1Where:
R = Resistance of the heaterP = Power of the heaterV = Voltage supplied to the heaterFrom the question,
Given:
V = 480 VP = 4.6 kW = 4600 WSubstitute these values into equation 1
R = (480²)/4600R = 50.1 ohms.Hence, the resistance expected of the heater is 50.1 ohms.
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The food calorie is equivalent to 4190 J . How many food calories does the cyclist burn if he rides over level ground at 7.3 m/s for 1.5 h ?
Answers
Answer:
To solve this problem, we need to use the formula: calories burned = (power expended in watts x time in seconds) / 4.184 First, we need to find the power expended in watts. We can use the formula: power = force x velocity Assuming the cyclist weighs 75 kg, the force required to maintain a speed of 7.3 m/s on level ground is: force = mass x acceleration force = 75 kg x 0 m/s^2 (since the cyclist is not accelerating) force = 0 N Therefore, the power expended by the cyclist is: power = force x velocity power = 0 N x 7.3 m/s power = 0 W Now we can plug in the values into the calories burned formula: calories burned = (power expended in watts x time in seconds) /
Which is the correct representation of the right-hand rule for a current flowing to the right?
Answers
Answer:
The third image
Explanation:
The one with the thumb pointing to the right
Answer:
3, correct on Edge 2020
A baseball is thrown horizontally at 46 m/s. The ball slows down at a rate of 5 m/s2. How long is the ball in the air before coming to rest?
Answers
Answer:
9.2 s
Explanation:
Given:
v₀ = 46 m/s
v = 0 m/s
a = -5 m/s²
Find: t
v = at + v₀
0 m/s = (-5 m/s²) t + 46 m/s
t = 9.2 s
The following are four electrical components.
A. A component which obeys ohm's law
B. Another component which obeys ohm's law
but which has higher resistance than A
A filament lamp
C.
D. A component, other than a filament lamp,
which does not obey ohm's law.
a. For each of these components, sketch current-
voltage characteristics, plotting current on the
vertical axis, and showing both positive and
negative values. Use one set of axes for A and
B, and separate sets of axes for C and for D.
label your graphs clearly.
b.
Explain the shape of the characteristic for C
c. Name the component you have chosen for D.
Answers
For the following are four electrical components:
a. For components A and B, both of which obey Ohm's law, the current-voltage characteristics would be a straight line passing through the origin. The slope of the line for component B would be steeper than that of component A, indicating higher resistance.
b. The shape of the characteristic for component C, the filament lamp, can be explained by its construction. A filament lamp consists of a filament made of a resistive material, typically tungsten, which heats up and emits light when an electric current passes through it.
c. The component chosen for D, which does not obey Ohm's law, could be a diode. A diode is a two-terminal electronic component that allows the current to flow in only one direction.
For the following are four electrical components:
a. Sketches of current-voltage characteristics:
For components A and B, both of which obey Ohm's law, the current-voltage characteristics would be a straight line passing through the origin. The slope of the line for component B would be steeper than that of component A, indicating higher resistance.
Current (I)
^
| B
| /
| /
| /
| /
| /
| /
| /
| /
| /
|/
+------------------> Voltage (V)
Current (I)
^
| A
| /
| /
| /
| /
| /
| /
| /
| /
| /
|/
+------------------> Voltage (V)
For component C, a filament lamp, the current-voltage characteristic would be a curve that is not linear. It would exhibit a non-linear increase in current with increasing voltage. At lower voltages, the lamp would have low resistance, but as the voltage increases, the resistance of the filament also increases due to the phenomenon of thermal self-regulation. This leads to a slower increase in current at higher voltages.
For component D, a component that does not obey Ohm's law, the current-voltage characteristic could be any non-linear curve depending on the specific component chosen. Examples of components that do not obey Ohm's law include diodes and transistors.
b. The shape of the characteristic for component C, the filament lamp, can be explained by its construction. A filament lamp consists of a filament made of a resistive material, typically tungsten, which heats up and emits light when an electric current passes through it. As the voltage across the filament increases, the temperature of the filament increases as well, causing its resistance to increase. This increase in resistance results in a slower increase in current with increasing voltage, leading to the characteristic non-linear curve observed.
c. The component chosen for D, which does not obey Ohm's law, could be a diode. A diode is a two-terminal electronic component that allows the current to flow in only one direction. It exhibits a non-linear current-voltage characteristic where it conducts current only when the voltage is above a certain threshold, known as the forward voltage. Below this threshold, the diode has a high resistance and blocks current flow in the reverse direction. The characteristic curve of a diode would show negligible current flow until the forward voltage is reached, after which it exhibits a rapid increase in current with a relatively constant voltage.
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Walking down a pebble beach becomes less painful as you enter the sea. Explain why.
Answers
Answer:Since pressure = force/area, the same force on a smaller area means more pressure. When you are walking on sand, the force being applied by your body is spread out over the entire surface of your foot. ... So, more pressure applied on a given area of your foot causes more pain.
Explanation:
Good Question
A student is planning to make changes to a circuit. Which change will
increase the resistance?
A. Replace the wire with one that is longer.
B. Swap ne positions of the battery and the switch.
C. Replace the wire with one that is shorter.
D. Swap the positions of the lightbulb and the switch.
Answers
Answer:
A)
Explanation:
This is because the longer the wire is, the more resistance there is for the electricity to run through.
The student can increase the resistance by replacing the wire with one that is longer. Thus, option A is correct.
What is Ohm's law?The voltage across a conductor, according to Ohm's law, is precisely proportional to the current that passes through it.
A wire's resistance is inversely correlated with its cross-sectional area and directly correlated with its length. Most conductors have a resistance to the flow of an electric current through them. As the wire's length increases, the resistance in the wire rises.
However, according to Ohms law V=IR, a wire's length increases its resistance while decreasing its current for a given potential difference (voltage).
Therefore, replacing the wire with a longer one will increase resistance if a student plans to modify a circuit.
Thus, option A is correct.
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A chocolate chip cookie is an example of a (2 points) a homogeneous mixture b heterogeneous mixture c suspension d colloid
Answers
Answer:
I think it is heterogeneous mixture. have a good day
Answer:
heterogeneous mixture
Explanation:
i took the test
What is indicated by the following displacement time graph ?
Answers
Answer:
The object in motion is deaccelerating in the negative direction.
Explanation:
Interpret the given position-time graph.
Observing the graph we can determine the slope is negative and is gradually flattening out. Thus, we can conclude the object in motion is deaccelerating in the negative direction.
Which formula is used to find an object's acceleration?
a= Δt – Δν
a= Δv + Δt
a= Δv/ Δt
a= Δt/Δv
Answers
Answer:
its the third one
The decibel rules of thumb can be combined. (a) If a sound has intensity xdB, how many dB does a sound 100 times more intense have? (b) If another sound has intensity ydB, how many dB does a sound 4 times less intense have? (c) Combine what you know about (a) and (b): If a sound has intensity zdB, how many dB does a sound 25 times more intense have?
Answers
which statement about metals is true?
Answers
All metals are solid at (our) living temperatures except for mercury which is a liquid. Metals are shiny for a while at least when properly finished. Metals are good conductors of both heat and electricity. This is due to the excess electrons in their valence clouds that facilitate energy transfer.What are 5 characteristics of metal?
Metals are lustrous, malleable, ductile, good conductors of heat and electricity
Silver conducts electricity better than any other metal.
Brass is an alloy made from zinc and copper.
Pure gold is too soft for many things so most gold is combined with other metals to make it stronger. ...
World time periods are often listed by the metal used.
3. Calculate the radii of the first five Fresnel zones if the distance from the light source to the wave surface is 1m, the distance from the wave surface to the observation point is also 1m and the light wavelength is 0.0000005m. (0.50mm; 0.71mm; 0.86mm; 1.0mm; 1.12mm).
Answers
The radii of the first five Fresnel zones is 3.6 mm.
Distance from the light source to the wave surface, d₁ = 1 m
Distance from the wave surface to the observation point, d₂ = 1 m.
Wavelength of the light used, λ = 5 x 10⁻⁶m = 5 μm
The expression for the radius of the Fresnel zones is given by,
rₙ = √[nλd₁d₂/(d₁ + d₂)]
Therefore, the radii of the first five Fresnel zones is,
r₅ = √[5 x 5 x 10⁻⁶x 1 x 1/(1 + 1)]
r₅ = √(25 x 10⁻⁶/2)
r₅ = 3.6 x 10⁻³m
r₅ = 3.6 mm
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Radiocarbon dating of a sample of wood from the tomb of an Egyptian pharaoh found that in 1 of the sample there were 9.843 × 10−15 of C-14 and 1.202 × 10−2 of C-12. The C-14 isotope is radioactive and undergoes − decay with a half-life of 5,730 years; the C-12 isotope is stable (does not decay). If the initial ratio of these isotopes is known to be −14 = 1.20 × 10−12, how old is the sample of wood in the tomb?
Answers
Let C be the total amount of C-14, after a time t from the origin of the piece of wood. If the initial amount of C-14 is C_0, and the half-life of C-14is τ, then, the formula that relates these variables, is:
\(C=C_0\times2^{-t/\tau}\)Isolate t from the equation:
\(\begin{gathered} \Rightarrow\frac{C}{C_0}=2^{-t/\tau} \\ \Rightarrow\log _2(\frac{C}{C_0})=-\frac{t}{\tau} \\ \Rightarrow-\tau\cdot\log _2(\frac{C}{C_0})=t \end{gathered}\)Therefore:
\(t=-\tau\cdot\log _2(\frac{C}{C_0})\)Since the ratio r between the initial amount of C-14 and C-12 is given, we can find the initial amount of C-14:
\(\begin{gathered} \frac{C_0}{C_{12}}=r \\ \Rightarrow C_0=r\times C_{12} \end{gathered}\)Substitute r=1.20*10^-12 and C_12=1.202*10^-2 mol to find the initial amount of C-14:
\(\begin{gathered} C_0=1.2\times10^{-12}\times1.202\times10^{-2}\text{mol} \\ =1.4424\times10^{-14}\text{mol} \end{gathered}\)Substitute τ=5730y, C_0=1.4414*10^-14 mol, and C=9.843*10^-15 mol into the formula to find t, which is the age of the wood from the sample:
\(\begin{gathered} t=-\tau\cdot\log _2(\frac{C}{C_0}) \\ =-5730y\times\log _2(\frac{9.843\times10^{-15}\text{mol}}{1.4424\times10^{-14}\text{mol}}) \\ =3158.956\ldots y \end{gathered}\)Therefore, to the nearest ten, the age of the sample of wood in the tomb, is:
\(3160\text{ years}\)which type of electromagnetic wave has more energy than ultraviolet waves?
A Visible light
B Infrared
C Microwaves
D X-rays
Answers
Answer:
D. X-rays have more energy than ultraviolet waves.
Lab: Types of Reactions Assignment: Lab Report
Answers
The types of chemical reactions are as follows:
Combination reactions Decomposition reactionsDouble decomposition Thermal dissociationRedox reactionsWhat the are the types of reactions?Chemical reactions are changes in which new substances are formed.
The types of chemical reactions are as follows:
Combination reactions - these are reactions in which two or more substances combine to form a single compoundDecomposition reactions - these are reactions in which a larger compound splits into smaller substancesDisplacement reactions - these are reactions in which one element or radical replaces another in a compoundDouble decomposition - these are reactions in which two substances exchange their radicals to form new compounds.Thermal dissociation - these reactions involves heating compounds to split them into smaller substances.Redox reactions - these are reactions in which oxidation and reduction reactions occur simultaneously.In conclusion, chemical reactions produce new substances.
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The amount of energy needed to a power a 0.20kw bulb for one minute would be just sufficient to lift a 2.5 kg object through a vertical distance of
Answers
The amount of energy needed to power a 0.20 kW bulb for one minute would be just sufficient to lift a 2.5 kg object through a vertical distance of approximately 29.03 meters.
To calculate the energy required to lift a 2.5 kg object through a vertical distance, we need to consider the gravitational potential energy formula:
Potential energy (PE) = mass (m) × gravity (g) × height (h)
Where:
m = 2.5 kg (mass of the object)
g = 9.8 m/s² (acceleration due to gravity on Earth)
h = ? (height)
First, let's find the height (h) by rearranging the formula:
h = PE / (m × g)
Now, let's calculate the potential energy (PE) needed to lift the object. We are given that the power of the bulb is 0.20 kW, and we want to find the energy required for one minute. To convert kilowatts (kW) to joules (J), we multiply by the conversion factor of 3,600 (60 seconds × 60 minutes):
Energy (E) = power (P) × time (t)
E = 0.20 kW × 1 min × 3,600 J/kW
Now, we can substitute the values into the equation to find the height:
h = (0.20 kW × 1 min × 3,600 J/kW) / (2.5 kg × 9.8 m/s²)
Calculating the expression on the right side:
h ≈ 0.20 × 1 × 3,600 / (2.5 × 9.8) ≈ 29.03 meters (rounded to two decimal places)
Therefore, the amount of energy needed to power a 0.20 kW bulb for one minute would be just sufficient to lift a 2.5 kg object through a vertical distance of approximately 29.03 meters.
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