what is the current in the 15-w resistor when e = 9.0 v?
The current in the 15-ohm resistor when e = 9.0 V is 0.6 A (amperes).
To determine the current in the 15-ohm resistor when e = 9.0 V, you can use Ohm's Law, which is stated as V = IR, where V is voltage, I is current, and R is resistance.
1. Identify the given values: e = 9.0 V and R = 15 ohms.
2. Rearrange Ohm's Law formula to solve for current: I = V/R.
3. Plug the given values into the formula: I = 9.0 V / 15 ohms.
So, The current in the 15-ohm resistor when e = 9.0 V is 0.6 A (amperes).
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Which of the following is defined as a force that pushes and pulls the current through the circuit? Group of answer choices D) resistance B) electricity A) current C) voltage
Answer:
C voltage
Explanation:
Voltage is the change in electric potential so basically current flows from high potential to low potential due to voltage.
How much work is performed by a student pulling a sled using 175 N of force over a distance of 200 meters?
Answer:
35000Joules
Explanation:
Work is done whenever force moves a body through a particular distance.
Work done = force × distance
Force = 175 newton
Distance = 200 meters
Work done = 175newton × 200meters
Work done = 35000 Joules or 35Kilo joules
The work done is 35000joules
A park ranger driving on a back country road suddenly sees a deer in his headlights 20
m ahead. The ranger, who is driving at 11.4 m/s, immediately applies the brakes and
slows down with an acceleration of 3.80 m/s2. How much distance is required for the
ranger's vehicle to come to rest? Only enter the number, not the units.
Answer:
17.1
Explanation:
The distance ahead, of the deer when it is sighted by the park ranger, d = 20 m
The initial speed with which the ranger was driving, u = 11.4 m/s
The acceleration rate with which the ranger slows down, a = (-)3.80 m/s² (For a vehicle slowing down, the acceleration is negative)
The distance required for the ranger to come to rest, s = Required
The kinematic equation of motion that can be used to find the distance the ranger's vehicle travels before coming to rest (the distance 's'), is given as follows;
v² = u² + 2·a·s
∴ s = (v² - u²)/(2·a)
Where;
v = The final velocity = 0 m/s (the vehicle comes to rest (stops))
Plugging in the values for 'v', 'u', and 'a', gives;
s = (0² - 11.4²)/(2 × -3.8) = 17.1
The distance the required for the ranger's vehicle to com to rest, s = 17.1 (meters).
An object is dropped from a 32 m tall building. How fast will it be going when it strikes
the ground?
Answer: 25.04m/s
Explanation:
v^2 = v^2o + 2a(x-xo)
v^2 = velocity
v^2o = initial velocity
a = acceleration
x = final position/distance
xo = initial position/distance
In this case, the initial velocity is 0 since the ball wasn't moving before it was dropped. The final position is 32 as the motion ended after the ball traveled 32m. The initial position is 0. The acceleration is 9.8m/s (free fall). Plug these numbers into the formula:
v^2 = 0 + 2(9.8)(32)
v^2 = 25.04396135
Round to get 25.04m/s
How much force is needed to accelerate a 7.1 kg skier at 4 m/s/s?
Answer: 28.4
Explanation:
F=MA
F=(7.1)(4)
F= 28.4 N
you lift a chair that weighs 50n to a height of 0.5m and carry it 10m across the room. how much work do you do on the chair
Answer:
50 N X 0.5m = 25J; No further work has been done on the chair once it has been lifted, because the direction in which you walk is perpendicular to the direction in which you lifted the chair.
Explanation:
a 10 kg object is moving in a straight-line with an initial speed of 2 m/s. how long (in s) will it take for the speed of the object to increase to 10 m/s if its kinetic energy increases at a rate of 20 j/s? you may treat this as an isolated system. a 10 kg object is moving in a straight-line with an initial speed of 2 m/s. how long (in s) will it take for the speed of the object to increase to 10 m/s if its kinetic energy increases at a rate of 20 j/s? you may treat this as an isolated system.
10 kg object is moving in a straight line with an initial speed of 2 m/s.it will take 8 seconds for the speed of the object to increase to 10 m/s if its kinetic energy increases at a rate of 20 j/s.
In an isolated system, energy is conserved, meaning that the total energy of the system remains constant. In this case, the rate of energy increase is 20 J/s, meaning that 20 J of energy is added to the system each second. This energy is used to accelerate the object, increasing its kinetic energy and thus its speed.
The equation t = (KE2 - KE1)/P can be used to calculate the amount of time it takes for an object to accelerate from one speed to another given a rate of energy increase. In this case, the object is accelerating from an initial speed of 2 m/s to a final speed of 10 m/s, and the rate of energy increase is 20 J/s. Therefore, it will take 8 seconds for the object to reach its final speed.
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The deflection produced by the Coriolis force is caused by O the Earth's rotation on its axis. O differing pressure gradients. O air temperature differences. O the uneven heating of Earth's surface. O friction caused by gravitational force.
The Planet on its axis often contributes to the deflection created by the Coriolis force.
Coriolis force: what is it?Moving objects in a reference point that rotates relative to an inertial frame are affected by an imagined or inertial force known as the Coriolis force. the force acting left of a object . an object in a frame of reference rotating in a clockwise direction.
Rotation: Rotation, often known as spin, is the cyclical motion of an object about a fundamental axis.
A two-dimensional rotating object can only have one possible central axis.
Such things have an axis that may rotate either counterclockwise or clockwise.
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Rising and falling like a gentle waltz, the dandelion seeds _______.
Which phrase is most appropriate for the diction and style of the sentence?
A.
dropped heavily onto the wet ground
B.
fell and scattered across the lawn
C.
danced lightly on the cool breeze
D.
blew like a hurricane across the yard
B
Explanation:
yeah but I don't know what
What is the area of space around a magnet called?
Answer:
These acts of attraction and repulsion are called “magnetism”, and the magnetic space around a magnet is called the “magnetic field”
Explanation:
1.²₁ f(x) dx, where x ≤ n f(x) = { sin (x), -3 sin(x), X > T (Express numbers in exact form. Use symbolic notation and fractions where needed.) 2x 1² f(x) dx = Calculate
The given problem involves calculating the definite integral of a function f(x) over a specific range. The function f(x) is defined differently for different values of x, and the final result of the definite integral \(1^2\)₁ f(x) dx, where x ≤ n, is -cos(n) - (-cos(1)) + 3cos(T) - 3cos(n) + infinity.
To calculate the definite integral 1²₁ f(x) dx, where x ≤ n, we need to evaluate the integral of the given function f(x) over the specified range. The function f(x) has different definitions depending on the value of x. For x ≤ n, the function is sin(x), and for x > n, the function is -3sin(x). Additionally, the function is defined as 2x for values of x greater than a certain threshold T.
To solve this problem, we need to consider the different intervals of the range separately. First, we integrate sin(x) over the interval 1 to n. The integral of sin(x) is -cos(x), so the value of this part of the integral becomes -cos(n) - (-cos(1)).
Next, we need to integrate -3sin(x) over the interval n to T. The integral of -3sin(x) is 3cos(x), so this part of the integral becomes 3cos(T) - 3cos(n).
Lastly, we integrate 2x over the interval T to infinity. The integral of 2x is \(x^2\), so this part of the integral becomes infinity.
Combining these three parts, the final result of the definite integral \(1^2\)₁ f(x) dx, where x ≤ n, is -cos(n) - (-cos(1)) + 3cos(T) - 3cos(n) + infinity.
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A car is launched by a spring and goes to the top of a loop. Fill in the energy bar chart by drawing a vertical bar(s) in the correct position (both Initial & Final conditions).
Answer:
A) the initial point all energy is elastic potential and the final point all energy is kinetic
B) a bar graph the two bars have the same height and the sum of their height is the initial energy
C) two bars, one for the kinetic energy and the other for the gravitational potential energy.
Explanation:
A) For this exercise we must use the energy conservation relations
starting point. When the spring is compressed
Em₀ = K_e = ½ k x²
end point, at the bottom of the loop
Em_f = K = ½ m v²
energy is conserved
Em₀ = Em_f
½ k x² = ½ m v²
v = \(\sqrt{ \frac{k}{m} }\) x
In a bar graph the initial point all energy is elastic potential and the final point all energy is kinetic
B) intermediate point in a quarter of the radius
In this case we use the lower part of the loop as the starting point and the quarter part of the bow as the end point.
Em₀ = K
Em_f = K + U = ½ m v² + m g R
in a bar graph the two bars have the same height and the sum of their height is the initial energy
C) End point highest part of the loop
starting point, bottom of loop
Emo = K = ½ m v₀²
from part A of the exercise we saw that it is equal to the elastic energy of the spring
final point. Highest part of the loop
Emf = K + U
Em_f = ½ m \(v_{f}^2\) + mg (2R)
where R is the radius of the loop
Em₀ = Em_f
1/2 m v₀² = 1/2 m v_{f}^2+ mg 2R
v₀² = v_f^2 + 4gR
In a bar graph there are two bars, one for the kinetic energy and the other for the gravitational potential energy. The sum of the heights of these bars is the initial energy, so the energy is transformed but not created or destroyed in the process.
at what height above the ground must a body of mass 10kg be situated in order to have potential energy equal in value to the kinetic energy possessed by another body of mass 10 kg moving with a velocity of 10 ms-1
Answer:
The body must have to be situated at a height 5.10 m.
Explanation:
The body of mass 10 kg must be situated at a height of approximately 51.02 meters above the ground.
What is conservation of energy principle?The conservation of energy principle states that the total energy of a system is constant. In this case, we can equate the potential energy of the first body to the kinetic energy of the second body, as follows:
Potential energy = Kinetic energy
\(mgh = 1/2 mv^2\)
where m is the mass of each body, g is the acceleration due to gravity, h is the height above the ground, and v is the velocity of the second body.
Substituting the given values, we get:
\(10 kg * g * h = 1/2 * 10 kg * (10 m/s)^2\)
Simplifying this equation, we get:
\(h = (1/2 * v^2) / g\\h = (1/2 * 10 m/s * 10 m/s) / 9.81 m/s^2\\h = 51.02 meters\)
Therefore, the body of mass 10 kg must be situated at a height of approximately 51.02 meters above the ground to have potential energy equal in value to the kinetic energy possessed by the other body of mass 10 kg moving with a velocity of 10 m/s.
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What does a wave transfer as it moves
A wave transfers ENERGY from one place to another.
In the equation for specific heat capacity, temperature is measured using the units degrees __________.
Answer kelvin
Explanation:
Describe the relationships between wavelengths and health risks.
In general, the shorter the wavelength, the greater the danger to living things. Although longer wavelengths also have their hazards, very short wavelengths, such as X-rays and gamma rays, can easily damage living tissue
What is wavelength ?UV radiation is more damaging when its wavelength is shorter. Shorter wavelength UV light, however, has a lower ability to enter skin. Three bands make up the UV area, which has a wavelength range of 100 to 400 nm. UVA (315-400 nm) (315-400 nm)
A waveform signal's wavelength is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. Its length in wireless systems is typically expressed in metres (m), centimetres (cm), or millimetres (mm) (mm).
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In ______ schemes, the voltage level oscillates between a positive and a negative value although it may remain at zero level between the two values.
In bipolar schemes, the voltage level oscillates between a positive and a negative value, and it may also remain at zero level between these two values.
Bipolar schemes are commonly used in electronic systems for digital data transmission or analog signal modulation. In these schemes, the voltage polarity alternates to represent binary digits or encode information.
This allows for efficient transmission and reliable detection of the signal. Bipolar schemes are widely employed in various communication technologies, such as Ethernet, RS-232, and T-carrier systems. They provide a balanced approach to signal representation, ensuring accurate and robust data communication. In bipolar schemes, the voltage oscillates between positive and negative values, with the potential of staying at zero in between.
These schemes are used in electronic systems for transmitting digital data or encoding analog signals. Bipolar schemes enable reliable signal detection and efficient transmission, making them prevalent in communication technologies like Ethernet and RS-232.
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will the particle move to the right (in the positive x -direction) or to the left (in the negative x -direction), and why?
Yes, the particle moves in the positive x-direction (to the right) or the negative x-direction (to the left) due to the forces of attraction and repulsion.
When the particle's velocity is positive, it is travelling to the right. When the velocity is negative, it also moves to the left. A body with a higher mass may have a lower moment of inertia than a body with a lower mass. This relies on the mass distribution and axis with respect to which we are computing the moment of inertia. In real-world situations, we frequently avoid dealing with particles.
The time it takes for a constant force to bring a particle to rest, on the other hand, is represented by its momentum.
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What is the frequency of a wave Travelling at 500 m/s with a wavelength of 25 m?
The frequency of the travelling wave is found to be 20 Hertz.
The relationship between the frequency of the wave, the wavelength of the wave and the speed of the wave is given by
V = fy
Where,
V is the speed of the travelling wave,
F is the frequency of the travelling wave,
y is the wavelength of the travelling wave.
The speed of the travelling wave is given to be 500m/s and the wavelength of the travelling wave is 25m.
Now, putting all the values,
500 = f(25)
f = 500/25
f = 20Hz
So, the frequency of the travelling wave is 20Hz.
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what is the ratio of electrostatic force and the gravitational force between a proton and an electron?
Answer:
Explanation:
electron attraction between electron and nucleus = centripetal force of the orbiting electron
In fact, Bohr model depicts the atom as a nucleus surrounded by electrons in circular orbit around it, similar to the planets around the Sun. The centripetal force that keeps the electrons in circular motion around the nucles is provided by the electrostatic force between the electrons and the nucleus.
Answer:
Fg = G M m / R^2 the gravitational force (M proton, m electron)
Fe = K e^2 / R^2 the electrical force where K = 9 *10E9 and e = charge
Fe / Fg = K e^2 / (G M m)
Fe / Fg = 9 * 10E9 * (1.6 * 10E-19)^2 / (6.67 * 10E-11 * 1.67 * 10E-27 * 9.11 * 10E-31
9 * 1.6^2 / (6.67 * 1.67 * 9.11) * 10^-29 / 10^-69
= 2.27 * 10E39 for the ratio of the two forces
How much energy is needed to change the temperature of 60. 0 g of water by 25. 0oc?.
349.65 J energy is needed to change the temperature of 60. 0 g of water by 25. 0oc
molar mass of \(H_{2}O\) = 18 g /mole
no. of moles = 60 / 18 = 3.33 moles
total heat energy required = n * \(C_{p}\) *ΔT
= 3.33 * 4.2 J /g / ° C * 25 = 349.65 J
349.65 J energy is needed to change the temperature of 60. 0 g of water by 25. 0oc
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as the change in speed at the boundary of two materials is greater what happened to the angle of refraction (please help )
a. it becomes less
b. it becomes more
c. it stays the same
How do I calculate final speed
Answer:
Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v.
Explanation:
A. 1 and 2 > 3 and 4 = 4 and 5
B. 1 and 2 > 3 and 4 > 4 and 5
C. 3 and 4 > 4 and 5 > 1 and 2
D. 1 and 2 > 4 and 5 > 3 and 4
E. 3 and 4 = 4 and 5 > 1 and 2
Answer:
1 and 2>3 and 4=4 and 5 that is the answer
True or false: in our solar system, only the sun creates radio waves
If one person pushes on an object with a force of 200 N and another person pushes with a force of 150 N in the opposite direction, what is the net force on the object?
So, their net force on the object is 50 N in a forward direction from the first person.
IntroductionHi ! Here, I will help you with the net forces (results of forces) acting on a two-dimensional area and in opposite directions. Steps that can be taken are as follows :
Determine where the force will go, the important thing is that you are consistent until the end. Count the values of the force acting, the force against the direction of your mind in number 1 is given a negative sign.Look at the results, if it's marked (-), then choose the opposite direction from your thoughts at number 1.The equation for calculating the net force from this two-dimensional straight line is as follows:
\( \boxed{\sf{\bold{\sum F = F_1 + F_2 + ... + F_n}}} \)
With the following condition :
\( \sf{\sum F} \) = net force (N)\( \sf{F_1} \) = first force and its direction (N)\( \sf{F_2} \) = second force and its direction (N)\( \sf{... + F_n} \) = You can add up the force values as many times as the question (N).Problem SolvingWe know that :
In my mind, I determined that the force will go to forward direction from the first person. So :
\( \sf{F_1} \) = first person force = 200 N >> Because he is the frame of reference.\( \sf{F_2} \) = second person force = -150 N >> Because he against the direction of the frame of reference (first person)What was asked :
\( \sf{\sum F} \) = net force = ... NStep by step :
\( \sf{\sum F = F_1 + F_2} \)
\( \sf{\sum F = 200 + (-150)} \)
\( \sf{\sum F = 200 - 150} \)
\( \boxed{\sf{\sum F = 50 \: N} \)
ConclusionThe movement of the object is forward (from the first person) because the net force value that I calculated is not opposite (with negative sign) to the right direction. So, their net force on the object is 50 N to the forward direction from first person.
Select the appropriate unit for each type of measurement. Amplitude: Frequency: Wavelength: Wave speed: Loudness:.
The amplitude and wavelength are measured in meters while frequency is measured in decibels.
Units of measurement:Amplitude: It is the maximum displacement of the points of the wave from its mean position. Hence it is measured in meters.Frequency: It is measured in Hertz. A hertz is a number of waves passed from a single point per second.Wavelength: It is the distance between two consecutive crests or troughs. hence it is measured in meters.Wave speed: It is measured in m/s.Loudness: The loudness of the sound is measured in decibels.Therefore, the amplitude and wavelength are measured in meters while frequency is measured in decibels.
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Answer:
meter
hertz
meters
meters/seconds
decibals
Explanation:
Assume that the space shuttle orbited Earth at altitudes of around 5.00×105 m. Determine the time T for one orbit of the shuttle about Earth.
The time T for one orbit of the shuttle about Earth is T = 2π√(r³ / GM) = 2π√((6.87×10⁶ m)³ / (6.67×10⁻¹¹ N m²/kg²)(5.97×10²⁴ kg)).
To determine the time T for one orbit of the space shuttle around Earth, we can use the equation for the period of an object in circular motion.
The period, T, is the time it takes for the shuttle to complete one full orbit around Earth. It is related to the radius of the orbit, r, and the gravitational constant, G, by the equation:
T = 2π√(r³ / GM)
where π is a constant approximately equal to 3.14159, r is the radius of the orbit, G is the gravitational constant, and M is the mass of Earth.
In this case, the altitude of the orbit is given as 5.00×10⁵ m. To find the radius of the orbit, we need to add the radius of Earth, which is approximately 6.37×10⁶ m, to the altitude:
r = altitude + radius of Earth
= 5.00×10⁵m + 6.37×10⁶ m
= 6.87×10⁶ m
Next, we need to find the mass of Earth, which is approximately 5.97×10²⁴ kg.
Now we can plug these values into the equation for the period:
T = 2π√(r³ / GM)
= 2π√((6.87×10⁶ m)³ / (6.67×10⁻¹¹ N m²/kg²)(5.97×10²⁴ kg))
Calculating this equation will give us the time T for one orbit of the shuttle around Earth.
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Thermodynamics Consider the ordinary steam plant cycle..And the following data is from that plant:
1. "Boiler outlet and turbine inlet is P = 800 psia, T= 1400 °F.
2. The outlet of the turbine and condenser inlet is P = 40 psia
3.The condenser outlet and the inlet to the pump are at the same pressure as above and at 100% humidity
4. Assume the process in the pump is an adiabatic process Reversible
Determine:
a.) Heat produced by the boiler, in Btu/lbm
b.) Pump work in Btu/lbm
c.) Camot thermal efficiency
d.) Cycle thermal efficiency
e .) T vs s diagram with the saturation curve and all possible values of the cycle
a) The heat produced by the boiler is determined by calculating the enthalpy difference between the turbine inlet and the condenser inlet.
b) The pump work is calculated using the enthalpy difference between the condenser outlet and the pump inlet. Since the process is assumed to be adiabatic and reversible, the pump work is determined by the enthalpy change.
c) The Carnot thermal efficiency (η_carnot) can be calculated using the temperature values of the high-temperature reservoir (turbine inlet temperature) and the low-temperature reservoir (condenser temperature).
d) The cycle thermal efficiency (η_cycle) is the ratio of the net work output to the heat input in the Rankine cycle. The net work output is the difference between the turbine work and the pump work, while the heat input is the heat produced by the boiler.
e) To plot the T-s diagram, specific numerical values and additional information about the specific enthalpies at different states are required.
To solve this problem, we'll use the ideal Rankine cycle as the ordinary steam plant cycle.
1. Boiler outlet and turbine inlet: P = 800 psia, T = 1400 °F
2. Turbine outlet and condenser inlet: P = 40 psia
3. Condenser outlet and pump inlet: P = 40 psia, 100% humidity (saturated liquid)
a) Heat produced by the boiler:
The heat produced by the boiler can be calculated using the enthalpy difference between the turbine inlet and the condenser inlet. We'll need to convert the temperature to Rankine scale for the calculations.
Turbine inlet temperature = 1400 °F + 459.67 °R = 1859.67 °R
Condenser inlet temperature (saturation temperature) can be obtained from the steam tables.
Let's assume the enthalpy at the turbine inlet (h1) is known and obtained from the steam tables. The enthalpy at the condenser inlet (h3) will be the enthalpy of saturated liquid at the condenser pressure.
Heat produced by the boiler = h1 - h3 (in Btu/lbm)
b) Pump work:
Since the process in the pump is assumed to be adiabatic and reversible, the pump work can be calculated using the enthalpy difference between the condenser outlet and the pump inlet.
Again, the enthalpy at the condenser outlet (h4) will be the enthalpy of saturated liquid at the condenser pressure, and the enthalpy at the pump inlet (h5) will be obtained from the steam tables.
Pump work = h4 - h5 (in Btu/lbm)
c) Carnot thermal efficiency:
Carnot thermal efficiency (η_carnot) is the maximum possible thermal efficiency for a heat engine operating between the temperatures of the high-temperature reservoir (T_H) and the low-temperature reservoir (T_L).
η_carnot = 1 - (T_L / T_H)
In this case, T_H is the turbine inlet temperature and T_L is the condenser temperature (saturation temperature at the condenser pressure).
d) Cycle thermal efficiency:
Cycle thermal efficiency (η_cycle) is the ratio of the net work output to the heat input in the Rankine cycle.
η_cycle = (Net work output) / (Heat input)
Net work output = Turbine work - Pump work
Heat input = Heat produced by the boiler
e) T-s diagram:
A T-s (temperature-entropy) diagram can be plotted with the saturation curve and the values of the cycle. The diagram shows the various states and processes in the Rankine cycle.
To provide specific numerical values and plot the T-s diagram, additional information is needed, such as the specific enthalpies at different states.
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