A person sitting in a parked car hears an approaching ambulance siren at a frequency f1 and as it passes him and moves away he hears a frequency f2. The actual frequency f of the source is Group of answer choices

a force of 25 newtons moves a box a distance of 4 meeters in 5 seconds. the work done on the box is? NM and the power is.? nm / s

Akeem is walking on the beach on a hot summer day. The sand is very hot, so he runs and puts his feet in the water, which is much cooler. Explain why the water is cooler than the sand.

Nightmares occur during ___ sleep

Which would not provide a useful measurement of temperature? A. the change in the height of a liquid in a tube that is open on one end B. the pressure of a gas inside a container of constant volume C. the electrical resistance of a conducting wire D.

You are standing on a large sheet of frictionless ice and holding a large rock. in order to get off the ice, you throw the rock so it has velocity 12.0 m/s relative to the earth at an angle of 35.0∘ above the horizontal. your mass is 61.

Scscientist ask questions and make observations what types of questions and observations would you make if you are scientist studying schools of fish in the ocean

4. Water is flowing at 12m/s in a horizontal pipe under a pressure of 600kpa radius 2cm. a. What is the speed of the water on the other side of 0.5cm radius? b. What is the pressure of the other side?

What caused the solar system to form a disk?

Under what circumstances can air resistance exercises ignored?

How does friction affect all moving objects?