Answer:
1375J
Explanation:
The gravitational potential/potential energy of the at the top of the tree which is the energy by virtue of its position.
P.E = mgh
mass = m
Acceleration due to gravity = g
height = h
At the top of the tree, the value of h (height) is high resulting in the gravitational potential. When the cat lands on the ground, the value of h is zero, the the gravitational potential would be zero and all the potential energy have been converted to other forms of energy.
Therefore, the total gravitational potential store is equal to the maximum amount of energy that can be transferred which is equal to 1375J.
Answer:
4
Explanation:
TRUST ME AND I AM SORRY IF RONG
Out of the choices provided I would choose B, this is because A is wrong due to simple machines making our work easier and require less energy, C is wrong due to the work actually being done faster due to simple machines. Now D and B felt like they were both correct but D just doesn't make much since when you apply it to the topic of Simple machines so I found B.
The ocean current the question talks about is the following:
"The Gulf Stream moves northward off the east coast of the United States at a speed of up to 3.5 m/s. Assume that the current<span> flows at this maximum speed and that the earth's field is 50 μT tipped 60° below horizontal. "
The situation is represented in the picture attached.
In order to find the direction of the magnetic force (Lorentz's force) you need to use the rule of the right hand: since the charge moving is negative, you need to place your thumb in the opposite direction of the velocity, while you need to place the other fingers in the same direction of the magnetic field. The magnetic force's direction will be perpendicular to your hand and the sense will be exiting the palm of your hand (and the sheet).
</span>