A 72-kg man stands on a spring scale in an elevator. Startingfrom rest, the elevator ascends, attaining its maximum speed of 1.2m/s in 0.80 s. The elevator travels with this constant speed for5.0 s, undergoes a uniform negative acceleration for 1.5s, and then comes to rest. What does the spring scale register (a) before the elevator starts to Move?
(b) during the first 0.80 s ofthe elevator's ascent?
(c) while the elevator is traveling atconstant speed?
(d) during the elevator's negativeacceleration?

Astudent looks at ocean waves coming into the beach. an ocean wave with more energy will a) have a greater height. b) have a greater period. c) travel toward the beach faster. d) strike the beach with greater frequency.

Aloop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. a loop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. moving the loop outside of the magnetic field region. spin the loop such that its axis does not consistently line up with the magnetic field direction. change the magnitude of the magnetic field. change the diameter of the loop

The velocity of sound wave in air at 35°c is 353m/s, calculate the velocity of sound at 46°c