Acar is traveling 20 kilometers an hour, then changes direction at a fork in the road. the action that the car takes changes its

group of answer choices

velocity, but not its speed

speed, but not its acceleration.

speed, but not its velocity.

acceleration, but not its velocity.

Option A is the correct answer.

Explanation:

We know that speed is a scalar, velocity is a vector and acceleration is a vector.

So when direction of motion changes vector values also change scalar values remains the same.

Here car a car is traveling 20 kilometers an hour, then changes direction at a fork in the road. So car's speed will not change and velocity changes because of changing direction.

Option A is the correct answer.

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:

cant without the picture! ?