When an effervescent tablet is dropped in water, what indicates that a chemical change is occurring?

a. the evolution of a gas

b. the condensation of a gas

c. the melting of a solid

d. the subliming of a solid

A 4 kg bird is flying with a velocity 4 m/s. What is the kinetic energy

A constant net torque is applied to a rotating object. Which of the following best describes the object's motion? A constant net torque is applied to a rotating object.

1. Two forces of 7 lb. and 14 lb. act on a body at right angles to each other. Find the angle their resultant force makes with the force of 14 lb. 2. A velocity of 30 mph is resolved into two components, each of which makes an angle of 45 with it.

Which of the following parts of the electromagnetic spectrum has the lowest energy? A. Microwaves B. Visible light C. X-rays D. Ultraviolet light

A student coils a copper wire around a bar magnet. What action will cause the device to generate electricity?

A digital thermometer reads 15 degrees Celsius, what is the uncertainty?

Determine the magnitude of the effective value of g⃗ at a latitude of 60 ∘ on the earth. assume the earth is a rotating sphere.

What characteristic of a planet determines the acceleration due to gravity on it?

Which set of terms best defines what affects kinetic energy and potential energy, respectively? position, gravity gravity, position velocity, height height, velocity

You are operating a powerboat at night. You see green and white lights on another boat. What should you do?