Coins were developed as a medium of exchange because other items like cows, grain, and land were more difficult to move from place to place.

An electromagnetic wave is composed of electrical and magnetic energy. true or false

What is peer review? ...

What name is given to the property of an object to resist changes in motion

Which statement comparing the penetrating power of different types of radiation is correct? A. Gamma radiation is more penetrating than alpha radiation. B. Alpha radiation is more penetrating than gamma radiation. C.

A swing has a period of 10 seconds. What is its frequency?

A person performs 300 j of work over the course of 60 seconds how much power they did required

If you have a 90 V power source with a 30-Ω and 60-Ω resistor in series, what is the voltage drop over the 60-Ω resistor? 30 V 2 V 60 V 90 V

How is thermal energy transferred during convection?

What is the purpose of a free body diagram? A. to show the velocity of an object B. to show the acceleration of an object C. to show the forces acting on an object D. to show the direction of motion vectors of an object

An initially uncharged air-filled capacitor is connected to a 5.83 V charging source. As a result, 3.41*10-5 C of charge is transferred from one of the capacitor's plates to the other.