Answer:
Explanation:
In microwave, there are waves called "microwaves" as per the name. So, The heating of food is done with the help of waves. Radiation is "the transfer of heat through waves". That is why the process of heating food in a microwave is "Radiation".
Answer:
the unit vector points from the point charge toward where the field is measured(from proton to point P)
Explanation:
1) 256.9 N/m
The force applied to the spring is equal to the weight of the block hanging on the spring:
And the spring constant can be found by using Hook's law, because we know that the displacement caused by this force is x = 0.29 m:
2) 1.08 Hz
The angular frequency of oscillation of the spring is given by the formula:
And the frequency of oscillation is given by:
3) 2.19 m/s
The velocity at time t of the block is given by:
where
is the initial velocity of the block
is the angular frequency
t is the time
Substituting t=0.36 s, we find the speed of the block at that time:
And the negative sign means that the direction of the velocity is upward (because the initial velocity was downward)
4) 25.6 m/s^2
The maximum acceleration is given by:
where A is the amplitude of the oscillation.
We can find the amplitude by using the law of conservation of energy: in fact, the kinetic energy at the equilibrium point must be equal to the elastic potential energy at the point of maximum displacement:
So, the maximum acceleration is
5) 95.1 N
The magnitude of the net force acting on the block is given by the difference between the weight and the restoring force of the spring:
First, we need to find the position x at t=0.36 s, which is given by
And so, the net force is
And the negative sign means the direction of the force is upward.