It's actually Friction.
I just did the test and got it right.
The period of a wave is the reciprocal of the frequency, f=1/T.
So the frequency would be 32Hz, assuming the period was given in seconds.
You can stop air pollution by riding public transport instead of your own car.
You can stop smoking.
You can stop non needed burning.
Never burn rubber.
Plant trees or flowers.
Recycle.
Reuse.
Please vote brainlist! : )
Answer:
fr = 514.5 N, This force has the opposite direction to the applied force.
Explanation:
Let's propose the solution of the problem using Newton's Second Law, we place a reference frame with the horizontal x-axis
Y axis
N- W = 0
N = W
X axis
F -fr = m a
the friction force has the expression
fr = μ N
fr = μ mg
fr = 0.35 150 9.8
fr = 514.5 N
This force has the opposite direction to the applied force.
The student's answer is incorrect because the friction coefficient must be multiplied by the normal
Answer:
∴The air cannot be made to flow in with the given pump at the given conditions.
Explanation:
Given:
- gauge pressure of bicycle tyre,
- length of cylinder of the pump,
- area of the the cylinder of the pump,
- we have the density of air at STP,
The piston must be pushed more than the pressure inside the tyre:
∴The air cannot be made to flow in with the given pump at the given conditions.