A cop car's siren has a frequency of 700. Hz. If you are standing on the sidewalk as the cop car approaches you at a speed of 15.0 m/s, what frequency would you hear? The speed of sound is 343 m/s.

Which of the following is not correct for an object in projectile motion on earth? a. the only force acting on the object is gravity. b. the shape of the object's path is a parabola. c. the object's acceleration never changes with time. d.

Why does your heart not get tired of constantly beating throughout your body

Water flows into a swimming pool at the rate of 8 gal/min. The pool is 16 ft wide, 32 ft long and 8 ft deep. How long does it take to fill? (1 U. S. gallon = 231 cubic inches)

One characteristic of a lagoon is often

Carbohydrates, fats, proteins: These organic molecules ALL have this element in common. This element can form multiple bonds, and it bonds with other elements as well as with itself. This element is

A 590-kg rocket is at rest on the launch pad. what upward thrust force is needed to accelerate the rocket uniformly to an upward speed of 28 m/s in 3.3 s?

Is work being done when a hiker puts on a bag

run at the same speed and in the same direction, and they both run for the same amount of time, what can you say about the distance they travel?

How can you show positive body languages with your mouth

After making minor changes to a team report, Jeff felit like he had done enough work on the project. When he was asked to contribute more, he got offlended and quit responding to requests from some leam members.