Answer:
v=30 m/s
Explanation:
h - height
g - acceleration due to gravity=10
t - time
v- velocity
45 = 5t²
t² = 9
t=3 seconds
v=g×t
v=10×3
v=30 m/s
Physics is explicitly involved in studying which of these activities?
2 answers:
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Answer:
49.82414 atm
50.74675 atm
Explanation:
P = Pressure
V = Volume = 5.45 L
R = Gas constant = 0.08205 L atm/mol K
T = Temperature = 25°C
a = 0.211 atm L²/mol²
b = 0.0171 atm L²/mol²
From ideal gas law we have
The pressure is 49.82414 atm
From Van der Waals equation we have
The pressure is 50.74675 atm
Explanation:
Mass of the ball, m = 0.058 kg
Initial speed of the ball, u = 11 m/s
Final speed of the ball, v = -11 m/s (negative as it rebounds)
Time, t = 2.1 s
(a) Let F is the average force exerted on the wall. It is given by :
F = 0.607 N
(b) Area of wall,
Let P is the average pressure on that area. It is given by :
P = 0.202 Pa
Hence, this is the required solution.