Answer:
P.E = 82320 joules
Explanation:
Given,
The mass of the squirrel, m = 700 Kg
The squirrel leaped to a height, h = 12 m
The acceleration due to gravity, g = 9.8 m/s²
The potential energy of a body is possessed by its height. It is given by the formula
P.E = mgh joules
Substituting the values in the above equation
P.E = 700 Kg x 9.8 m/s² x 12 m
= 82320 joules
The Potential Energy of the squirrel is, P.E = 82320 joules
Answer:0.58 m
Explanation:
The initial velocity of the ball is u = 2.0 m/s
The height of the table is, h = 1.0 m
The ball falls in vertical direction under acceleration due to gravity.
Time taken for ball to hit the floor:
h= ut + 0.5gt² ( from the equation of motion)
1.0 m=2.0 m/s × t+0.5 × 9.8 m/s²× t²
Solving this for t,
t = 0.29 s ( we have neglected the negative value of t)
In the same time, the ball would cover a horizontal distance of :
s = u t
⇒s = 2.0 m/s×0.29 s = 0.58 m
Thus, the landing spot is 0.58 m away from the table.
A device that minimizes heat transfer is thermos. Technical name is vacuum flask.
<u>Explanation:</u>
Thermos is a bottle in which vacuum separates it from the surrounding. When the bottle is surrounded by the vacuum, there is a significant minimization in conduction.
The only part that having point of contact with the bottle inside is the thing which holds it in respective place. But there will be a small piece of contact, which will make the inner bottle to conduct heat to a small extent.
C. zinc is best used for making screws. Zinc is best used for making alloys, anything made from 55% or 95% copper more then likely contain zinc