Answer:
Explanation:
V = Volume of air = 
P = Power = 10 W
t = Time = 1 hour
m = Mass of air = 2 kg
Specific volume is given by
The specific volume at the final state is
Work done is given by
The energy transfer by work, is
Change in specific internal energy is given by
The change in specific internal energy of the air is
Yes, this is accurate. While "dark matter" might exist, it is still more of a theory, it is not yet defined properly. As far as we truthfully know, the entire universe is just matter and energy.
Answer:
Power = 1471000[W]
Explanation:
In order to solve this problem, we must use the conversion factor of horsepower to Watts.
1 [Hp] → 735.5 [W]
Now using the conversion factor:
![2000[Hp]*\frac{735.5W}{1Hp}=1471000[W]](https://tex.z-dn.net/?f=2000%5BHp%5D%2A%5Cfrac%7B735.5W%7D%7B1Hp%7D%3D1471000%5BW%5D)
Answer:
(B) 0.5 g
Explanation:
Newton's second law says ∑ F i = m a .
the rate of change in momentum of a body is proportional to the force applied on the body.
f∝ma
f=kma
were k is constant and equal to 1
The centripetal acceleration is an acceleration.
the tension on the swing and object weight goes to the left hand side while the centripetal acceleration goes to the right handside
At the bottom of the swing, ΣF = FT – mg = mac;
notice that the tension in the swing is 1.5 times the weight of the object
we can write
1.5mg – mg = mac,
0.5mg = mac
0.5 g=ac
