When a certain metal is illuminated with light of frequency 3.0*1015 hz, a stopping potential of 7.27 v is required to stop the most energetic electrons. what is the work function of this metal?

How much potential energy is in a 30.0 kg box of cooking pots held 10.0 m high?

Which number should be placed in the blank before o2 to balance the equation? n2 ___o2→2no2?

A 2500-kg car falls over a cliff and converts 1000,000J of PE into KE. a. How much mechanical energy does the car have throughout the trip? b. How high is the cliff? c. With what velocity does it land?

Which is the last step in conduction a Urlacher search

Which statements describe the applications of nuclear medicine scans? Check all that apply. O assess disease progression and tissue function utilize ultrasound utilize a biologically active molecule require a CT scan utilize a radionuclide tracer

A 1300 kg car carrying four 84 kg people travels over a "washboard" dirt road with corrugations 3.2 m apart. The car bounces with maximum amplitude when its speed is 13 km/h.

Skeletal muscle cells have large stores of ATP that are readily available and alone can provide energy for maximal exercise lasting 30-60 seconds.

A catcher "gives" with a baseball when catching it. If the baseball exerts a force of 475 N on the glove such that the glove is displaced 8.97 cm, how much work is done by the ball? Answer in units of J.

Which of the following is the best sign that cooking pancake batter causes a chemical change

The electric field near the earth's surface has magnitude of about 150n/c. what is the acceleration experienced by an electron near the surface of the earth? express your answer to two significant figures and include the appropriate units.