gravity dwn, your hand up and equal to grav
Well, first off, mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both. Heat energy is the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases. Light energy is the only form of energy that we can actually see directly. It is formed through chemical, radiation, and mechanical means. Striking a match stick (mechanical energy) creates fire, which has a ton of heat energy, and produces light too, so the answer, is A. I hope i could help!
Answer:
= 1000 hours
Explanation:
Earth's circumference is 10⁴ mile
speed of a sailboat is 10¹ mile/hour
distance = speed × time
10⁴ = 10¹ × t
t = 10⁴ / 10¹
t = 10³
= 1000 hours
Answer : The mechanical energy of the rock is, 134 J
Solution :
As we know that the mechanical energy is equal to the sum of the kinetic energy and the potential energy.
The formula used for mechanical energy is,
where,
M.E = mechanical energy
K.E = kinetic energy
P.E = potential energy
m = mass of an object = 2 Kg
v = velocity of an object = 6 m/s
h = height = 5 m
g = acceleration due to gravity = 
Now put all the given values in the above formula, we get the mechanical energy of the rock.
![M.E=[\frac{1}{2}(2Kg)\times (6m/s)^2]+(2Kg\times 9.8m/s^2\times 5m)=134\text{ Kg }m^2s^{-2}=134J](https://tex.z-dn.net/?f=M.E%3D%5B%5Cfrac%7B1%7D%7B2%7D%282Kg%29%5Ctimes%20%286m%2Fs%29%5E2%5D%2B%282Kg%5Ctimes%209.8m%2Fs%5E2%5Ctimes%205m%29%3D134%5Ctext%7B%20Kg%20%7Dm%5E2s%5E%7B-2%7D%3D134J)
Therefore, the mechanical energy of the rock is, 134 J
Answer:
-200°C
Explanation:
This is because at -200°C the temperature is below -196°C and above -210°C .Thus Nitrogen can be in liquid state.
