Answer:
Explanation:
The first derivative of the angular momentum with respect to time is defined as the magnitude of the average torque acting on the particle:
So, we calculate the magnitude of the average torque, dividing the change of the angular momemtum into the time:
Answer:
A - Sublimation
B - Evaporation
C - Melting
Explanation:
The state of change present in A is Sublimation. Dry Ice is the most common example of Sublimation of everyday life
The state of change present in B is evaporation. Boiling water into water vapor is something that anyone can see.
The state of change present in C is called Melting. Think of Ice melting into a pool of water as the ice heats up.
Answer:
Explanation:
The gravitational force between two corpses is given by the following equation:
Where F is the force, G is the gravitational constant
(), M and m are the masses of the corpses and d is the distance between them.
So we have that:
Here are two ways to do it:
<u>Way #1:</u>
-- You know that gravity accelerates things that are falling freely, adding 9.8 m/s to their speed every second.
-- After 6 seconds, an object that fell from rest winds up falling at (9.8 x 6) = 58.8m/s.
-- During that time, its average speed was 1/2(0 + 58.8) = 29.4 m/s .
-- In 6 seconds, at an average speed of 29.4 m/s, it covers (29.4 x 6) = <em>176.4meters</em>.
<u>Way #2:</u>
This way only works if you remember the formula for the distance covered during uniform acceleration.
D = 1/2 (acceleration) (time)²
Acceleration = gravity = 9.8 m/s²
Time = 6 seconds
D = 1/2 (9.8) (6)² = <em>176.4 meters</em>.
Answer:
(a) 80.36 m/s^2
(b) 0.0933 second
Explanation:
initial velocity, u = 7.5 m/s
final velocity, v = 0 m/s
distance moved, s = 0.350 m
(a) Let a be the deceleration.
Use third equation of motion
a = 80.36 m/s^2
Thus, the deceleration is 80.36 m/s^2.
(b) Let the time taken is t
Use first equation of motion
v = u + a t
0 = 7.5 + 80.36 x t
t = 0.0933 second