A person, with a mass of 50.0 kg, stands on a weighing scale in a lift which is moving

upwards with a uniform acceleration of 5.0 m/s

2

. What would be the reading on the

scale?

(A) 490 N (B) 250 N (C) 740 N (D) 240 N

A certain metal with atomic mass 2.9 * 10-25 kg has an interatomic bond with length 2.3 * 10-10 m and stiffness 48 N/m. What is the speed of sound in a rod made of this metal?

What is the difference between Volt and Amber

How does mass and force affect the motion of an object?

Which of the following items is most sensitive to increased acidity in the environment? concrete buildings glass windows railroad tracks paved roads

Which statement describes the velocity of a mass oscillating on a spring? The velocity is constant throughout the motion. The velocity remains the same throughout the motion. The velocity is zero at the maximum displacement.

Stretched 1 cm beyond its natural length, a rubber band exerts a restoring force of magnitude 2 newtons.

Researcher measures the thickness of a layer of benzene (n = 1.50) floating on water by shining monochromatic light onto the film and varying the wavelength of the light.

How is mechanical energy calculated? A. by adding potential energy and kinetic energy B. Oby subtracting potential energy from kinetic energy C. by multiplying potential energy and kinetic energy D. by dividing potential energy by kinetic energy

The voltage (or electric potential) of battery determines a. how much net electric charge is in the battery b. how much work the battery can do on an electric charge c. how much electric field is around

The net force on a 3.2kg toy airplane is 7N. What is the accelerator of the airplane?