A siren produces waves in the air. If the frequency of the waves is gradually decreasing which of the following changes to the waves is most likely occurring?

A car with a mass of 2,000 kilograms is moving around a circular curve at a uniform velocity of 25 meters per second. The curve has a radius of 80 meters. What is the centripetal force on the car? A. 20,250 N B. 15,625 N C. 625 N D. 703 N

What is the kinetic energy of a 25 kg object moving at a velocity of 5 m/s?

A _ fault moves because it is under tension

Which compound should require the highest temperature to melt? LiF, NaF, LiCl, NaCl

During the first 50s a truck traveled at constant speed of 25m/s. Find the distance that it traveled

Two masses are separated by 1 m. suppose the masses are moved so they are 2 m apart how will the gravitational force change

Bob rubs a piece of fur on a hand rubber rod, giving the rod a negative charge. what happens?

The period of a simple pendulum is 3.8 s. the length of the pendulum is doubled. what is the period t of the longer pendulum? t = s

True or false - sound waves can travel across outer space.

In which one of the following locations can a person hear the echo of a sound? a. At least 33.2 meters behind the reflecting surface b. Less than 16.6 meters in front of the reflecting surface c. Less than 33.2 meters behind the reflecting surface d.