Answer:
Time taken to stop = 6 sec
Explanation:
Given:
Rotation of wheel = 1.10 × 10² rev/min
Final velocity (v) = 0
Angular acceleration (a) = - 1.92 rad/s²
Find:
Time taken to stop
Computation:
Initial velocity (u) = (1.10 × 10² × 2π rad) / 60 sec
Initial velocity (u) = 11.52 rad / sec
We know that,
V = U +at
t = (v-u)a
t = (0 - 11.52) / (-1.92)
Time taken to stop = 6 sec
Answer:
The second type of body wave is the S wave or secondary wave, which is the second wave you feel in an earthquake. An S wave is slower than a P wave and can only move through solid rock, not through any liquid medium.
Answer:
The force of gravity decreases as the distance between the masses increase
Explanation:
The force of gravity is an attractive force that any object with mass exerts on other objects with mass.
The magnitude of the force of gravity between two objects is given by
where
G is the gravitational constant
m1, m2 are the masses of the two objects
r is the separation between the objects
From the equation, we see that:
- The gravitational force is directly proportional to the masses: so, as the masses increase, the magnitude of the force increases
- The gravitational force is inversely proportional to the square of the distance: so, as the distance increases, the magnitude of the force decreases
So, we can complete the sentence as follows:
The force of gravity decreases as the distance between the masses increase
A frog can be many different colours. It appears green under normal 'white' light because it absorbs all the other colours in the light's spectrum apart from green. It reflects the green light back and that is picked up by your eye.
If the light is red, there is no green in the spectrum of the light, only red. So, the red light will be absorbed and there is no green to be reflected back for you to see. Therefore, the frog will not look green.