Which statements describe velocity and acceleration? check all that apply. velocity equals displacement divided by time. all velocities are “instantaneous” and occur only at a point in time. velocity and acceleration are calculated using the same variables. acceleration equals change in velocity divided by time. acceleration is always constant; it cannot vary. average velocity can be found by using several velocities and their total time.

Velocity is defined by rate of change in the position

which we can also write as

while acceleration is defined as rate of change in velocity

so acceleration and velocity both are rate of change in position and rate of change in velocity with respect to time respectively

out of all above statement the correct answer must be

Acceleration equals change in velocity divided by time.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: