Sound waves must have intensity if a person is to hear them.

a. True

b. False

The wings of a honeybee move at a frequency of 220 Hz. What is the period for a complete wing-beat cycle?

problem A newly established colony on the Moon launches a capsule vertically with an initial speed of 1.445 km/s. Ignoring the rotation of the Moon, what is the maximum height reached by the capsule

True or false: The quantity represented by theta_0 is a function of time (i. e., is not constant).

The planet Krypton has a mass of 7.6 * 1023 kg and radius of 1.7 * 106 m. What is the acceleration of an object in free fall near the surface of Krypton? The gravitational constant is 6.6726 * 10-11 N · m2 / kg2. Answer in units of m/s 2.

Explain what is meant by the Doppler Effect. Explain one real-world application of the Doppler Effect

The speed of a car is decreasing uniformly from 35 m/s to 15 m/s in 4 s the magnitude of the car's acceleration is

An object that has kinetic energy must what?

A student measures the length and width of a rectangle to be 40.7 cm and 0.599 cm, respectively. Wanting to find the area (in cm2) of this rectangle, the student multiplies on a calculator and obtains a result of 24.3793.

A red apple is illuminated by green light. what color will the apple appear as?

Explain why a roller coaster's second hill cannot be taller than the first hill.