A cat can hear sound frequencies up to 70,000 hz. bats send and receive ultra-high-frequency squeaks up to 120,000 hz. which hears sound of shorter wavelengths: cats or bats?

Which organism would be a top consumer in a food chain

What is a direct fossil

Amy has a mass of 30 kg, and she is riding a scateboard traveling 5 m/s. what is her momentum?

A light bulb, a fan, and a tiny speaker are connected to a battery in a series circuit. How will the circuit behave if it is open? A) None of the devices will work. B) The battery will heat up and explode.

2. A mass M is suspended from a frictionless hinge on a massless stick of length b. A massless rod is held perpendicular to the first rod (making ski-lift ''T-bar'') and another mass m slides frictionlessly along the second rod.

Which of the following is not shorthand to describe one of the three types of ecological relationships? +/+ -/+ +/0 -/0

Which is a characteristic of an electromagnetic wave?

What does the ozone layer absorb? a. Microwaves c. UV radiation b. X-rays d. Infra-red radiation

An object is undergoing shm with period 0.900 s and amplitude 0.320 m. at t = 0 the object is at x = 0.320 m and is instantaneously at rest. calculate the time it takes the object to go (a) from x = 0.320 m to x = 0.160 m and (b) from x = 0.

Your friend states in a report that the average time required to circle a 1.0-mi track was 49.325 s. This was measured by timing 10 laps using a stopwatch with a precision of 0.01 s. Do you believe his results are reliable? Explain.