H = 40 m, the height from which the ball is dropped.
m = 1 kg, the mass of the ball
Assume g = 9.8 m/s² and neglect air resistance.
The initial vertical velocity is zero.
If t = the time of flight, then
40 m = (1/2)*g*(t s)² = 0.5*9.8*t²
t² = 40/4.9 = 8.1633
t = 2.857 s
Answer: 2.9 s (nearest tenth)
The mass of the gas is169g.
Electric
field strength = Electric force/charge
E = F/q
E = (1.8×10^-1) / (6.4×10^-7)
E = 2.81×10^5 NC^-1
Hope it helped!
Answer:
259.456 J
Explanation:
Given that,
Work done on the system = 166 cal
The systam releases 954 J of thermal energy to its surroundings
We need to find the change in internal energy. It can be given by using the first law of thermodynamics as follows :

W = 166 cal = 694.544 (1cal = 4.184 J)

So, the change in internal energy of the system is 259.456 J.