A700-kg car, driving at 29 m/s, hits a brick wall and rebounds with a speed of 4.5 m/s. what is the car’s change in momentum due to this collision? a. 2.3x 10^4 kg·m/s towards the wall b. 2.3x 10^4 kg·m/s away from the wall c. 1.7 x 10^4 kg·m/s away from the wall d. 1.7 x 10^4 kg·m/s towards the wall impulse

C. 1.7 × 10⁴ kg.m/s away from the wall

Explanation:

Change in momentum: This is the product of mass and change in velocity of a body. The Unit of change in momentum is kg.m/s.

Change in momentum of the car = m(v₂ - v₁) Equation 1

Where m = mass of the car, v₁ = initial velocity of the car, v₂ = final velocity of the car.

Given: m = 700 kg, v₁ = 29 m/s, v₂ = 4.5 m/s

Substituting these values into equation 1

Change in momentum of the car = 700(4.5-29)

Change in momentum of the car = 700(-24.5)

Change in momentum of the car = 700(-24.5)

Change in momentum of the car = -17150 kg.m/s

Therefore the Change in momentum of the car is 1.7 × 10⁴ kg.m/s away from the way wall.

The right option is C. 1.7 × 10⁴ kg.m/s away from the wall

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: