Answer:
It does not indicate the car's direction. Since velocity is both magnitude and direction, the speedometer measures speed but does NOT measure velocity
Answer
given,
conducting wire length = ℓ m = 0.5
moves at velocity = v m/s = v ( t ) = 4 t + 9
magnetic field strength = B = 2 T
V = − B ℓ v
V = - 2 × 0.5 × v
V = - v
a) 

b) given
v ( t ) = 4 t + 9
V = (-1)(4t + 9)


Answer:

Explanation:
It is given that,
Speed of P- waves, v = 9 km/s = 9000 m/s
The density of rock is about 
We need to find the average bulk modulus of Earth's crust. Let it is given by B. So,

So, the bulk modulus of the Earth's crust is
.
Answer:
Amplitude
Explanation:
The amplitude of a periodic variable is a measure of its change over a single period. There are various definitions of amplitude, which are all functions of the magnitude of the differences between the variable's extreme values. In older texts the phase is sometimes called the amplitude.