Ultraviolet light emits a total of 2.5 * 10^-17 J of light at a wavelength of 9.8 * 10^-7 m. How many photons does this correspond to?

A rope is used to pull a 4.36 kg block at constant speed 4.33 m along a horizontal floor. The force on the block from the rope is 7.97 N and directed 26.2° above the horizontal.

A dolphin emits ultrasound of 100kHz and uses the timings of reflection to determine the position of objects in the water. What is the wavelengths of this ultrasound? Note the speed of sound in water is 1480m/s.

Match the following vocabulary words with their definitions. 1. the decay of organic matter caused by microorganisms putrefaction 2. susceptible to decomposition by living organisms. refuse 3. waste biodegradable

A car is stopped at a red light. The light turns green, and the car begins to move. After 6 seconds, the car traveling at 20m/s. How far did the car travel?

what is the average speed of a person who can run around the track 4 times in 5 minutes? the track is 400 meters long.

Electric current is ...

What type of ethic is life-centered and views humans as just one component life on Earth

Which formula describes acceleration? m/s^2 m/s s/m m2

An arrow is shot upward on mars from ground level with a velocity of 60 meters per second. Its height (in meters) after t seconds is given by 2 s (t) = 60t - 1.9t^2.

Energy transformations in a bouncy house