Consider two laboratory carts of different masses but identical kinetic energies and the three following statements. which of the statements below would be correct? a) the one with the greatest mass has the greatest momentum. b) the same impulse was required to accelerate each cart from rest. c) both can do the same amount of work as they come to a stop.

a) The one with the greatest mass has the greatest momentum.

c) Both can do the same amount of work as they come to a stop.

Explanation:

The relation between kinetic energy and momentum is shown below as:

Thus, having same kinetic energy, the greatest mass will correspond to greatest momentum.

Hence, Option a is correct.

Since, they have same kinetic energy, they can do the same amount of work when they come to stop as they posses same energy.

Hence, Option c is correct.

Since, Impulse is change in momentum. Thus, they both posses different momentum and thus, impulse will also not be same for both of them.

Hence, Option b is incorrect.

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:

a and b sometimes have a positive value