Answer:
3 A
Explanation:
Charge is a product of current and time, expressed as Q=It where Q is charge in Coulombs, I is current in Amperes and t is time taken in seconds. Making I the subject of the formula then ![I=\frac {Q}{t}](https://tex.z-dn.net/?f=I%3D%5Cfrac%20%7BQ%7D%7Bt%7D)
Substituting 120 C for charge and 40 s for t then![I=\frac {120}{40}=3\ A](https://tex.z-dn.net/?f=I%3D%5Cfrac%20%7B120%7D%7B40%7D%3D3%5C%20A)
From the choices given, it appears that time should have been 4 s to get option A or alternatively charge should have been 1200 C
Objects and substances in motion have Kinetic Energy.
Explanation:
Kinetic Energy is the motion of objects, substances, molecules, atoms .
Whenever an object starts to move, it is in motion. Kinetic Energy is generated, when the object moves and its potential energy gets dropped with the movement. Kinetic Energy is found in every object that moves.
The Kinetic Energy of an object depends both on its mass and its speed. Kinetic Energy increases as mass and speed are increased.
Example: By using the wind flow from wind turbines, the Kinetic energy in the wind can be transformed to generate electricity by using generators.
Answer:
7.89 7.91
Explanation:
The ranges of measurement lie between 7.92-0.05 and 7.92+0.05
7.87g and 7.97g
We have that the initial velocity is mathematically given as
V1=86.4m/s
<h3>Velocity</h3>
Question Parameters:
- A 0.05 kg arrow
- Is fired at a velocity towards a 1.2 kg apple.
- The arrow sticks in the apple and both move at 3.6m/s.
Generally the equation for the Conservation of momentum is mathematically given as
M1V1=M2V2
Therefore
0.05*V1=1.2*3.6
V1=(1.2*3.6)/0.05
V1=86.4m/s
For more information on Velocity visit
brainly.com/question/7359669
This should help u find it