What is an example of a third class lever and why use it? A) pulley; changes direction B) baseball bat; increases velocity Eliminate C) car jack; increases the weight it can lift D) wheel barrow; makes it easier to move a load

During which phase of the moon may a lunar eclipse occur?

What is the current in a circuit with a 6.0 V battery and a 2.0 Ω resistor?

Primary ecological succession definition

A guitar string is 1.75 m. Calculate the wavelength of the 78th harmonic * A) 78 m B) 0.02 m C) 0.04 m D) 0 44.60

A cheetah is 65kg and goes from 0 m/s to 160 m/s in 4 seconds

Steve hears a siren emitting a frequency of 10 kHz when it is at rest. What frequency will Steve hear if the siren moves toward him at 30 m/s? Assume the speed of sound is 340 m/s. Answer options are: a. 11 kHz b. 10 kHz c. 0 kHz d. 9 kHz

What is the efficiency of a machine that has work input of 40 joules and work output of 35 joules

What happens to an object if the forces acting on it are unbalanced?

A 92-kg astronaut and a 2000-kg satellite are at rest relative to a space station. the astronaut pushes on the satellite, giving it a speed of 0.14 m/s directly away from the station.

How to calculate wavelength in m when you know the frequency?