Answer:
Explanation:
given data:
Q = - 2.1 Btu
![V_2 = V_1 [\frac{P_1}{P_2}]^{1.1}](https://tex.z-dn.net/?f=V_2%20%3D%20V_1%20%5B%5Cfrac%7BP_1%7D%7BP_2%7D%5D%5E%7B1.1%7D)
![= 1 [\frac{23040}{56160}]^{\frac{1}{1.1}](https://tex.z-dn.net/?f=%3D%20%201%20%5B%5Cfrac%7B23040%7D%7B56160%7D%5D%5E%7B%5Cfrac%7B1%7D%7B1.1%7D)
work done during polytropic process
= -18442.1 ft lbf
we know 1 Btu = 778.169 ft. lbf, therefore
w = -23.6993 Btu
Answer: time t = 2 seconds
Explanation:
Given that
Power P = 50W
Energy E = 100J
How long did it take to move the box from the floor to the shelf ? This implies time taken.
Power is defined as the rate at which work is done. I.e
P = W.D/t
Where work done = energy
50 = 100/t
Make t the subject of formula
t = 100/50
t = 2 second
Biology. The science of all living creatures
Tide is the alternating pattern of rising and falling sea level with respect to land.
There are three types of tide relative to the position of the moon and sun to that of the earth.
1. Spring tides. Occur when the moon sun and earth arrange themselves more or less in a straight line, like an arrow. These tides are the highest and lowest tides.
2. Perigean spring tides. Occur when the new moon or full moon closely aligns with perigee, the closest point to the earth in the moon's orbit. These tides are not as high or low as the spring tides.
3. Neap tides. Occur when the sun and the moon are at right angles as seen from earth.The tides are at minimum range.
Sound waves <span>can NOT travel through the vacuum of space?</span>
