A drag racer completes a race in 14.3 s. If the drag racer has an average speed of 251 km/h, how long is the racetrack?

If the atmospheric pressure at 30.0 km is 28.0 torr and the temperature is - 39.0 °c, what is the volume of the balloon when it bursts?

Zora wants to dissolve a solute in a solvent quickly. Which best describes what she should do? a. decrease the pressure b. decrease the surface area c. shake it repeatedly d. place in a refrigerator

A person measures his heart rate by counting the number of beats in 30 s. if 33 ± 2 beats are counted in 30.0 ± 0.4 s, what is the heart rate and its uncertainty in beats per minute?

What form of simple machine is a hammer? A. lever B. screw C. pulley D. inclined plane

Emilio tries to jump to a nearby dock from a canoe that is floating in the water. Instead of landing on the dock, he falls into the water beside the canoe. Use newtons third law to explain why this happened.

A tuba creates a 4th harmonic of frequency 116.5 Hz. When the first valve is pushed, it opens an extra bit of tubing 0.721 m long. What is the new frequency of the 4th harmonic? (Hint : Find the original length.)

In the early 19th century Christian Doppler, an Austrian physicist, proposed a theory regarding the properties of a moving source of sound. This is now known as Doppler's law or the Doppler effect. What does this law state?

Legend says that archimedes, in determining whether or not the king's crown was made of pure gold, measured its volume by the water displacement method.

Resonance always causes the object resonating to fall apart or be destroyed. true or false

An insoluble solid material that is produced in double replacement reactions is called