For an object that travels at a fixed speed along a circular path, the acceleration of the object is LARGER IN MAGNITUDE THE SMALLER THE RADIUS OF CIRCLE.
Formula: s = d/t
s = speed
d = distance
t = time
Solve using the values we are given.
s = 300/40
s = 7.5m/s
Best of Luck!
Answer:
Wavelength, 
Frequency, 
Explanation:
We need to find the intensity of the radiation is a maximum for a black body at 298 K. It can be calculated using Wein's displacement law. It is given by :


Here, T = 298 K


If f is the frequency of black body radiation. It is given by :



Hence, this is the required solution.
Answer:
a. Yes, because the acceleration of the crate is 2.0 m/s².
Explanation:
Given
--- f
--- m
--- t
--- v
Required
Does the system support 
Yes, it does and this is shown below
The crate is initially at rest; so:

Using the first equation of motion

Substitute values for v, u and t


Make a the subject


Using 
Substitute values for F and m

Divide both sides by 3



In both cases:

<em>Hence, option (a) is correct.</em>