Answer:
Speed = Wavelength x Wave Frequency. In this equation, wavelength is measured in meters and frequency is measured in hertz (Hz), or number of waves per second. Therefore, wave speed is given in meters per second, which is the SI unit for speed.
Explanation:
Answer:
option (c).
Explanation:
A thermodynamical system is the system in which the system is closed and the volume is constant.
Here, the glass container which is sealed is the best example of thermodynamical closed system.
Answer:
m = 4
Explanation:
It is given that,
A 100 Newton force applied to a machine lifts a 400 N object.
We need to find the mechanical advantage of this machine.
The mechanical advantage of a machine is given by the ratio of output force to the input force.
Here, output force is 400 N and input force is 100 N
So, mechanical advantage becomes :
So, the mechanical advantage of this machine is 4.
Answer:
The platform move before coming to rest again 0.045 m far
Explanation:
Given
Ball is in motion
M (Platform mass + 2 people mass)
V (recoil velocity of the platform)
m (ball mass)
v (velocity ball)
MV + mv = 0
Distance of the platform movement is
t (time that the ball is in the air)
x = Vt
t =
Knowing the platform and the ball are moving while the ball is in the air
x =
Also knowing that
This way,
x = =
The minus sign means the displacement of the platform is in opposite direction to the displacement of the ball.