how research is important on gathering necessary information
Answers
Thank you !
Related Questions
What current (in a) is required to plate out 2.80 g of nickel from a solution of ni2 in 4.5 hour?
Answers
The answer is 0.568 A.
Coulombs and Faraday LawThe mathematical equation depicting the relationship of a charge and current is
Q = It
(1 faraday = 96500 C)
Here,
I - - > current
t - - > time
Standard value of atomic mass of nickel is 58.69 g/mol.
Using the moles formula,
n = m/M
where n is number of moles
m is mass of substance and
M is the atomic mass.
Putting the values,
n = 2.8/ 58.69
n = 0.04770 mol
Now the charge on the Nickel ion is 2 hence
Q = 2 x 0.04770 F
= 0.0954 x (96500C/1F)
= 9206.1 C
Now, Q = It
Putting the values
9206.1 C = I x 4.5 hours
Now 4.5 hours = 16,200 seconds.
I = (9206.1)/(16200)
I = 0.56827 C/s or 0.56827 A
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The variables for Part I of this experiment include whether or not the car hits the barrier and the distance that the washers travel. Use the drop-down menus to identify the independent and dependent variables.
The independent variable, the one that is intentionally manipulated, is
____.
The dependent variable, the one that you measure the response in, is
___.
Answers
Answer:
1. An encounter with the barrier
2. The distance traveled by the washer.
Explanation:
Answer:
Peep above me is correct
1.An encounter with the barrier
2.The distance traveled by the washer
Explanation:
got it right on edge2020 have a nice day peeps ^w^
Two persons (each on a skateboard) are initially standing still and facing each other before pushing off of each other. One person (50 kg) moves backwards at 1.1 m/s. Calculate the velocity of the second person (65 kg).
Answers
Answer:
The second person will have a velocity of 0.85 m/s in the opposite direction of the first person.
Explanation:
Law Of Conservation Of Linear Momentum
The total momentum of a system of bodies is conserved unless an external force is applied. The formula for the momentum of a body with mass m and velocity v is:
P=mv.
If we have a system of bodies, then the total momentum is the sum of them all
\(P=m_1v_1+m_2v_2+...+m_nv_n\)
If a collision occurs, the velocities change to v' and the final momentum is:
\(P'=m_1v'_1+m_2v'_2+...+m_nv'_n\)
In a system of two masses, the law of conservation of linear momentum is:
\(m_1v_1+m_2v_2=m_1v'_1+m_2v'_2\)
According to the conditions of the problem, two persons standing on a frictionless surface are initially at rest (v1=0, v2=0). Their masses are m1=50 Kg and m2=65 Kg. After the push, one person (say m1) moves backward at v1'=-1.1 m/s. We can calculate the speed of the other person by solving for v2':
\(\displaystyle v'_2=\frac{m_1v_1+m_2v_2-m_1v'_1}{m_2)\)
Substituting:
\(\displaystyle v'_2=\frac{50*0+65*0-50(-1.1)}{65)\)
\(\displaystyle v'_2=\frac{55}{65}\)
\(v'_2=0.85 \ m/s\)
The second person will have a velocity of 0.85 m/s in the opposite direction of the first person.
6. Delta particles (A) are a family of unstable baryons composed of up and down quarks. They can be positively or
negatively charged or can be neutral but have different masses compared to protons and neutrons and shorter
lifetimes. Deduce the charge of each delta baryon given its quark structure:
A with structure = uuu
A with structure = uud
A with structure = udd
A with structure = ddd
charge.
charge :
charge=
charge =
*******************
*****
Answers
The charges of the delta baryons with the given quark structures are:
A with structure uuu: +4/3
A with structure uud: +1
A with structure udd: 0
A with structure ddd: -1
How did we arrive at these values?Based on the quark structure of each delta baryon, we can determine their charges as follows:
Delta baryon with structure uuu: This baryon has three up quarks, each with a charge of +2/3. Therefore, the total charge of this delta baryon is +2/3 + 2/3 + 2/3 = +4/3.
Delta baryon with structure uud: This baryon has two up quarks and one down quark. Each up quark has a charge of +2/3, and the down quark has a charge of -1/3. Therefore, the total charge of this delta baryon is +2/3 + 2/3 - 1/3 = +1.
Delta baryon with structure udd: This baryon has one up quark and two down quarks. The up quark has a charge of +2/3, and each down quark has a charge of -1/3. Therefore, the total charge of this delta baryon is +2/3 - 1/3 - 1/3 = 0.
Delta baryon with structure ddd: This baryon has three down quarks, each with a charge of -1/3. Therefore, the total charge of this delta baryon is -1/3 - 1/3 - 1/3 = -1.
So, the charges of the delta baryons with the given quark structures are:
A with structure uuu: +4/3
A with structure uud: +1
A with structure udd: 0
A with structure ddd: -1
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3. Two fans blow at 5 ms^-1 in a easterly direction and 8ms^-1 in a Northerly
direction. What is the total wind speed of both fans combined?
Answers
Addition of vectors is done by adding the components of the vectors
The total speed of the fan is approximately 9.43 m/s,
Direction of total wind 58° counterclockwise from the positive x-axis
The reason the value is correct is as follows:
The given parameters are:
The direction at which the fan blowing at 5 m/s is blowing = Easterly
The direction in which the fan blowing 8 m/s is blowing = Northerly
The total speed of the van, |v| ≈ 9.43 m/s
Required:
To find the total wind speed of the fans
Solution:
Taken the easterly direction as the ith component, and the northerly direction as the jth component, the vector representing the speed of the fan is presented as follows
v = 5·i + 8·j
The magnitude of the total wind speed of the fan, |v| = √(5² + 8²) = √(89) ≈ 9.43
The total wind speed of the fan , |v| ≈ 9.43 m/s
The direction of the total speed with respect to the x-axis, θ, is given as follows;
θ = arctan(8/5) ≈ 58°
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How does the mechanical advantage of a second class lever
compare to the mechanical advantage of a third class lever?
Answers
The mechanical advantage of a second class lever compares to the mechanical advantage of a third class lever is generally greater than the mechanical advantage of a third class lever.
In a second class lever, the load is located between the fulcrum and the effort, which means that the effort arm is longer than the load arm. This results in a mechanical advantage that is greater than one, meaning that the effort required to move the load is less than the weight of the load itself.
In contrast, in a third class lever, the effort is located between the fulcrum and the load, which means that the load arm is longer than the effort arm. This results in a mechanical advantage that is less than one, meaning that the effort required to move the load is greater than the weight of the load itself. However, third class levers are still useful in situations where a greater range of motion or speed is required.
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Lyla walks three times per week for 45 minutes at a speed of 4.0 miles per hour. She wants to increase her time what should she do
Answers
Answer:
C. Walk four times per week
Explanation:
If she wants to increase her time then, she has to walk four times per week.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second. The generally considered unit for speed is a meter per second.
The mathematical expression for speed is given by
speed = total distance /Total time
As given in the problem Lyla walks three times per week for 45 minutes at a speed of 4.0 miles per hour. She must walk four times a week if she wants to extend her time.
Thus, the correct answer is option C.
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The question is incomplete, the complete question is,
Lyla walks three times per week for 45 minutes at a speed of 4.0 miles per hour. She wants to increase her time. What should she do?
A. Walk at 4.5 miles per hour.
B. Walk for 50 minutes.
C. Walk four times per week.
D. Walk up and down more hills.
A hiker walks 23.87 m, E and 12.90 m, N. What is the direction of his resultantdisplacement?
Answers
23.38 ° to the positive x-axis
Explanation
Step 1
draw the vectors
Step 2
add the vectors, ( component to component)
so
a) get the components of V1
\(\begin{gathered} 23.87\text{ at 0\degree} \\ so \\ V_{1x}=23.87\text{ cos 0=23.87} \\ V_{1y}=23.87\text{ sin 0= 0} \end{gathered}\)b) components of V2
\(\begin{gathered} 12.9\text{ at 90 \degree} \\ so \\ V_{2x}=\text{ 12.9 cos 90=0} \\ V_{2y}=12.9\text{ sen 90=12.9} \end{gathered}\)c) add
\(\begin{gathered} Vdis_x=23.87+0=23.87 \\ Vdis_y=0+12.9 \end{gathered}\)so, the magnitude of the displacement is
\(\begin{gathered} \lvert Vd\rvert=\sqrt[]{V^2_x+V^2_y} \\ replace \\ \lvert Vd\rvert=\sqrt[]{23.87^2+12.9^2} \\ \lvert Vd\rvert=27.132 \end{gathered}\)finally, the direction
as we have a rigth triangle
let
opposite side= 12.9
adjacent side=23.8
Now, use the tan function to find the angles
so
\(\begin{gathered} \tan \emptyset=\frac{opposite\text{ side }}{\text{adjancent side}} \\ \text{replace} \\ \tan x=\frac{12.9}{23.87} \\ \text{isolate x} \\ x=\tan ^{-1}(\frac{12.9}{23.87}) \\ x=28.38 \end{gathered}\)therefore, the direction of the resultant is
23.38 ° to the positive x-axis
I hope this helps you
(8.62 x 10-2) - (1.94 x 10-2)
Answers
Answer:
66.8
Explanation:
hope this helps
Answer:
66.8Explanation:
\((8.62 \times 10 - 2) - (1.94 \times 10 - 2)\)
Follow the PEDMAS order of Operation
\(8.62 \times 10 - 2 - 1.94 \times 10 + 2 \\ 86.2 - 2 - 19.4 + 2 \\ 86.2 - 2 - 17.4 \\ = 66.8\)
A capacitor is a simple electrical device. It consists of three parts sandwiched tightly together. Two outer layers made of conductors are separated by an insulating middle layer. A simple circuit is made with a capacitor, a wire, and a battery. When fully connected, which of the following occurs?
1. The insulator stops the flow of electricity.
2. One plate becomes positively charged.
3. The net charge on the capacitor remains at zero.
Answers
I only
II only
I, II, and III
I and II only
Answers
A substance that prevents free flow of electrical current is known as an electrical insulator. The electrons in the insulator's atoms are securely bonded and immobile.
Which plate is electrically positive?Protons are in overabundance on an aluminium plate that is positively charged. A positively charged aluminium plate has a deficiency of electrons when viewed from the perspective of electrons. We might characterise each extra proton as being somewhat dissatisfied in terms of people.
How could a plate get charged up positively?The other plate develops an imposed positive charge as a result of the electron's electric field, which pulls on the electrons that are in that plate and repels other electrons.
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a loop of area 0.100 m^2 is oriented at a 15.5 degree angle to a 0.500 T magnetic field. it rotates until it is at a 45.0 degree angle with field. what is the resulting CHANGE in the magnetic flux
Answers
Answer:
0.128
Explanation:
Credit to charlizebarth
Answer:
0.0128
Explanation:
This answer works for Acellus!
Which statement best describes how to write the genotype for
a trait?
a. A capital letter represents the dominant allele and a
different capital letter represents the recessive allele.
b. A capital letter represents the dominant allele and a
different lowercase letter represents the recessive allele.
C. A capital letter represents the dominant allele and the
lower case of that letter represents the recessive allele.
Answers
Answer:
b
Explanation:
can an object under constant acceleration come to rest and stay at rest?
Answers
Explanation:
No. If the object stays at rest, its acceleration is 0. So the acceleration must have changed.
What is the SI unit of energy called?
Answers
Energy is a fundamental concept in physics that describes the ability of a system to do work. In other words, energy is the ability to cause change in a system. There are many different forms of energy, such as thermal, kinetic, and potential energy, and each form of energy can be measured in units called joules (J). The joule is the SI unit of energy, and it is used to measure all forms of energy in the International System of Units (SI).
A joule is defined as the amount of energy required to perform a specific amount of work.
Energy can also be measured in other units, such as calories (cal), which is commonly used in nutrition to measure the energy content of food. However, in physics, the joule is the preferred unit of energy.
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why the first hill of a roller coaster must be the tallest.
Answers
We know that the mechanical energy is conserved, that is:
\(K_i+U_i=K_f+U_f\)Which means that when the car is riding down the potential energy is being converted to kinetic energy; conversely, when the car is riding up the kinetic energy is being converted to potential energy.
Now, the first hill has to be the tallest so that at that point the car has the greater potential energy and for conservation of energy we make sure that the car can climb up all the remaining hills on the roller coaster without getting stopped and without having the need of making more work on the roller coaster.
Answer:
So the roller coaster can gain momentum.
Explanation:
8.
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Answers
Answer:
I'm sorry I can't help you...
How much energy will it take to heat a 8kg object with a specific heat capacity of 820J/kg℃ from 15℃ to 50℃
Answers
Explanation:
h=mcƦ
where Ʀ means change in temperature
h=8×820×(50-15)
=8×820×35
=229600j
=229.6kj
why does the south polar ozone hole only form in august through november?
Answers
The South Polar ozone hole only forms in August through November because of the unique atmospheric conditions that exist during that time period.
First, the polar vortex, a large area of low pressure and cold air, forms over the Antarctic during the winter months (May to August). This vortex isolates the air within it, preventing the mixing of air from lower latitudes.
Second, the temperatures within the vortex drop to extremely low levels, creating polar stratospheric clouds (PSCs). These clouds provide a surface for chemical reactions that involve chlorine and bromine, which are released from man-made chemicals called chlorofluorocarbons (CFCs) and halons. These reactions lead to the destruction of ozone molecules.
Third, the sun returns to the Antarctic in August, providing the energy needed for these chemical reactions to occur. As a result, the ozone hole begins to form and reaches its maximum size in September or October.
Finally, the polar vortex breaks down in November, allowing the mixing of air from lower latitudes and the replenishment of ozone in the Antarctic stratosphere. This leads to the closing of the ozone hole until the following winter.
In summary, the South Polar ozone hole only forms in August through November due to the combination of the polar vortex, polar stratospheric clouds, and the return of the sun to the Antarctic.
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Part A
Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?
A. Materials that are insulators and conductors have a high
resistance to electricity.
B. It is more difficult for electricity to pass through insulators than conductors.
C. Insulators and conductors are able to generate a high amount of electricity
D.Electrons move through rubber easier than they move through
metal.
Part B
Which sentence from "Energy Story" best supports the answer in Part A?
A. "Electricity is conducted through some things better than
others."
B. "Its resistance measures how well something conducts
electricity."
C."Some things hold their electrons very tightly."
D. "Other materials have some loosely held electrons, which move
through them very easily."
Answers
Answer:
Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?
A. Materials that are insulators and conductors have a high
resistance to electricity.
Part B
Which sentence from "Energy Story" best supports the answer in Part A?
B. "Its resistance measures how well something conducts
electricity."
Explanation:
5. Find the velocity of a train that traveled 75 km in 35 minutes. (answer
in m/s). Conversion factors: 1000 m = 1 km; 60 s = 1 min.
Answers
75km=75000m
35min=2100 seconds
Velocity=Displacement/Time
=75000/2100
=750/21
=35.71 m/s
What energy transformation takes place when you push a pencil off your desk? A. Mechanical energy transforms into kinetic energy. B. Potential energy transforms into nuclear energy. C. Potential energy transforms into kinetic energy. D. Kinetic energy transforms into potential energy.
Answers
When you push a pencil off your desk, the energy transformation that takes place is that potential energy transforms into kinetic energy.
The correct answer to the given question is option C.
Potential energy is the energy stored within an object because of its position or configuration.
In this scenario, the pencil has potential energy because of its elevated position on the desk. When the pencil is pushed off the desk, it begins to move, which means that it has kinetic energy. Kinetic energy is the energy of motion.
As the pencil falls off the desk, its potential energy is transformed into kinetic energy, which is the energy that results from its motion. The faster the pencil falls, the greater its kinetic energy will be because kinetic energy is directly proportional to the square of an object's velocity.
Therefore, when you push a pencil off your desk, the potential energy that it has because of its elevated position is transformed into kinetic energy as it falls towards the ground.
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If you used a pulley of the type shown in the figure below to support a car engine of mass 135 kg, what would be the tension in the rope? The pulley system's mess is 6.65 kg MA-4 Subm Anawer Tries 0/1
Answers
The tension in the rope is 150 N.
The tension in the rope would be 150 N.
What are the given values?
Given,Mass of the engine = 135 kg
Mass of the pulley system = 6.65 kg
Acceleration due to gravity = 9.8 m/s²
Formula to calculate tension,T = m(g + a)
Where,T is the tension in the rope,m is the mass of the engine, and
a is the acceleration of the system.Here, the pulley system is at rest.
So, acceleration of the system is zero. Hence,a = 0
Substituting the given values in the above formula,T = 135 kg × (9.8 m/s² + 0)T = 1323 N
Now, the pulley system multiplies the tension by a factor of two.
Tension in the rope,T = 1323/2 N = 661.5 N= 662 N
Therefore, the tension in the rope is 150 N.
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Two identical automobiles are
approaching a yellow light. The first
automobile has a speed 30 mi/hr, and
the second automobile has a speed
42 mi/hr. Compared to the 30 mi/hr
automobile, the stopping distance of
the 42 mi/hr automobile will be
a) the same
c) double
b) 1.4 times longer
d) 4 times longer
Answers
Answer:
i think that it is b but I could be wrong
(368-12(2)) In general, the voltage limitation between conductors in a surface metal raceway shall not exceed _____ volts unless the metal has a thickness listed for higher voltage.
Answers
In general, the voltage limitation between conductors in a surface metal raceway shall not exceed 600 volts unless the metal has a thickness listed for higher voltage.
In general, the voltage limitation between conductors in a surface metal raceway shall not exceed _____ volts unless the metal has a thickness listed for higher voltage.
The voltage limitation between conductors in a surface metal raceway shall not exceed 600 volts unless the metal has a thickness listed for higher voltage.
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Metabolic support during the inflammatory response should be aimed at preserving body cell mass including vital organs and intracellular water. The goal is to provide adequate energy and protein to minimize ________________ without overfeeding.
Answers
Metabolic support during the inflammatory response should be aimed at preserving body cell mass including vital organs and intracellular water. The goal is to provide adequate energy and protein to minimize muscle wasting without overfeeding.
During the inflammatory response, the body's metabolism is altered, and there is an increased demand for energy and nutrients to support the immune system and tissue repair. However, excessive inflammation can lead to muscle wasting, where the body breaks down muscle tissue for energy. This can have detrimental effects on overall health and recovery.
To prevent muscle wasting and preserve body cell mass, it is important to provide adequate energy and protein through nutrition. Energy intake should match the increased energy expenditure caused by the inflammatory response. Protein is essential for tissue repair and immune function, so it should be provided in sufficient amounts.
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Simpson drives his car with an average velocity of 12 m/s to the east. How long will it him to drive 1440m on a straight road in seconds?
Answers
Answer:
1440÷12=120
Explanation:
because u have to divide the mitre with the 12 m
a plant that is 4.1 cm tall is 10.3 cm from a converging lens. you observe that the image of this plant is virtual and 6.2 cm tall. what is the focal length of the lens?
Answers
Answer:A plant that is 4.1 cm tall is 10.3 cm froma converging lens. You observe that the image of this plant is virtual and 6.2 cm tall.
The car in the diagram travels west with a forward acceleration of 0.22 m/s2. What was the car’s velocity (vi) at point xi if it travels a distance of 350 m in 18.4 s?
Answers
17.01 m/s is the car’s velocity .
s=ut+at²/2
s-at²/2=ut
u=s-at²/2÷t
u=312/18.4
u=17.01 m/s
"The rate at which an item changes its location" is described by a vector number called velocity. Imagine someone walking swiftly, one step forward, one step back, and starting each step from the same location. Velocity is a vector quantity. Therefore, velocity is cognizant of direction. The direction must be taken into account when determining an object's velocity. A velocity of 55 miles per hour is not adequate information. It is necessary to account for the direction in order to accurately describe the object's velocity. Simply put, the direction of the velocity vector represents the motion of the object.
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Suppose that during a test drive of two cars, one car travels 234 miles in the same time that a second car travels 180 miles. If the speed of the first car is 12 miles per hour faster than the speed of the second car, find the speed of both cars.
The speed of the first car is _____ mph. (Simplify your answer.)
The speed of the second car is _____ mph. (Simplify your answer)
Answers
The speed of the first car is 52 mph.
The speed of the second car is 40 mph.
Let's use "x" mph to represent the second car's speed. We can express the first car's speed as "x + 12" mph because it is 12 mph faster. According to our knowledge, the first car travelled 234 miles, while the second car covered 180 miles.
The relationship between speed and distance travelled is inversely proportional. As a result, the proportion of distances covered by the two vehicles will match the proportion of their speeds:
234 / 180 = (x + 12) / x
To solve this equation, we can cross-multiply:
234x = 180(x + 12)
Expanding the equation:
234x = 180x + 2160
Rearranging terms:
234x - 180x = 2160
54x = 2160
Dividing both sides by 54:
x = 40
Therefore, the speed of the second car is 40 mph.
To find the speed of the first car, we can substitute the value of x back into the expression "x + 12":
x + 12 = 40 + 12 = 52
Hence, the speed of the first car is 52 mph.
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A 200 g blob of clay moves with a speed of 10 m/s towards a 300 g cart that is initially at rest.
a. What is the momentum of the system before the blob of clay strikes the cart?
b. What must be the momentum of the system after they come together?
c. If the blob of clay sticks to the cart, with what speed will the clay and cart move after they come together?
Answers
Answer:
a. 2 kg*m/s
b. \(p_{T_{f}} = 0.5v_{f} = 2 kg*m/s\)
c. 4 m/s
Explanation:
a. The momentum of the system (\(p_{Ti}\)) before the blob of clay strikes the cart is:
\( p_{Ti} = p_{b} + p_{c} \)
Where:
\(p_{b}\) is the momentum of the blob clay
\(p_{c}\) is the momentum of the car
\( p_{Ti} = m_{b}v_{b} + m_{c}v_{c} \)
Since the car is initially at rest, \(v_{c}\) = 0
\( p_{Ti} = 200 g*\frac{1 kg}{1000 g}*10 m/s + 0 = 2 kg*m/s \)
b. The momentum of the system after they come together:
\(p_{T_{f}} = m_{b}v_{b} + m_{c}v_{c}\)
Since they come together, \(v_{b}\) =
\(p_{T_{f}} = v_{f}(m_{b} + m_{c}) = v_{f}(0.2 kg + 0.3 kg) = 0.5v_{f}\) (1)
Because we do not have the final speed we can not calculate the final momentum.
c. We can find the speed of the clay and car by conservation of the momentum:
\( p_{i} = p_{f} \)
The initial momentum of the system was founded in part "a" (p = 2 kg*m/s), so we have:
\( 2 kg*m/s = m_{b}v_{b_{f}} + m_{c}v_{c_{f}} \)
Again, when they come together, the final speed is the same:
\( 2 kg*m/s = v_{f}(m_{b} + m_{c}) \)
\( v_{f} = \frac{2 kg*m/s}{0.2 kg + 0.3 kg} = 4 m/s \)
Now, since we found the final speed we can calculate the momentum of the system after they come together (equation 1):
\( p_{T} = 0.5v_{f} = 0.5 kg*4m/s = 2 kg*m/s \)
I hope it helps you!