Answer:
Speed = 0.00392 m/s
Explanation:
Solution:
Frequency of the radio = 85 MHz
If we have the frequency, we can calculate the wavelength of the radio wave.
As we know,
Frequency = speed of light/wavelength
wavelength = c/f
c = speed of light = 3 x 
m/s
So,
Wavelength = 3 x m/s / 85 x 
Hz
Wavelength = 3.5294 m
Man gets disturbed reception at t = 15 min
t = 15 x 60 = 900 s
t = 900 s
Speed = distance/time
Here, distance is wavelength. So,
Speed = 3.5294 m / 900 s
Speed = 0.00392 m/s
Hence, the man's car is going with speed of 0.00392 m/s
C. a lot of inertia.............................. :-)
A b c d e f g h i j k l m
Answer:
7. Net force: 14 N
Direction: Right
8. Net force: 360 N
Direction: Right
Explanation:
For Nm 7 the most force is on the right side so it has more power then left side and so its gonna pull towards the right side cancelling the force on the left. So it becomes 26-12 N = 14N
For Nm 8 all the force is on the right side so they add up.
<span>We can use conservation of energy to solve this question.
The woman increases the potential energy of the box by applying her force over a certain distance.
The work that the woman does is force * distance.
The work the woman does is 25 N * 1 meters = 25 Joules.
25 Joules is the increase in potential energy of the box.
100 * distance of the box = 25
distance of the box = 0.25 meters
Therefore, for every one meter the woman pulls downward, the box rises a distance of 0.25 meters.</span>
