A force of 500 N acts horizontally on a 10,000 g body. What is its horizontal acceleration
1 answer:
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Answer:
The time taken by the brick to hit the ground, t = 0.84 s
Explanation:
Given that,
A brick falls from a height, h = 3.42 m
The initial velocity of the brick is zero.
Since the brick is under free-falling. The time equation of a free-falling body when the displacement is given is
t =
where,
h - height from surface in meters
g - acceleration due to gravity
on substituting the values in the above equation,
t =
= 0.84 s
Hence, time taken by the brick to hit the ground is t = 0.84 s
Given :
Mass of water, m = 2 grams.
The temperature of water drops from 31 °C to 29 °C .
The specific heat of water is 4.184 J/(g • °C).
To Find :
Amount of heat lost in this process.
Solution :
We know, heat lost is given by :
Therefore, amount of heat lost in this process is 16.736 J.
Answer:
300 nm
Explanation:
R = Gas constant = 8.314 J/molK
r = Atomic radii =
d = Atomic diameter =
At STP
T = Temperature = 273.15 K
P = Pressure = 100 kPa
= Avogadro's number =
The mean free path is given by
The answer that best represents the mean free path for gas molecules is 300 nm