How is radioactivity produced

A hot metal plate at 150 degree C has been placed in air at room temperature. Which event would most likely take place over the text few minutes

A + 17 nc charge is located at the origin. what is the strength of the electric field at the position (x, y) = (5.0cm, 0cm) ? express your answer using

Which of the following lists contains only examples of renewable sources of energy? A. wind, tidal, geothermal, and hydroelectric B. coal, solar, wind, and biomass C. fossil fuels and nuclear energy D. hydroelectric, petroleum, solar, and wind

A glowing blue mote of mass 32.3 g is traveling east at 4.50 m/s when it collides and merges with another mote of mass 78.0 g that is traveling west at 1.12 m/s. find the velocity of the motes after they merge together (be sure to include direction).

Which of these is the best exclamation for why to negatively charged balloons, if put close, will repel? A. Charged objects sin little lightning bolts of electrons across the space between the two balloons B.

In which galaxy is our solar system located? a. milky way b. ngc 4414 c. andromeda d. small magellanic cloud

Two astronauts, of masses 60 kg and 80 kg, are initially right next to each other and at rest in outer space. They suddenly push each other apart. How far has the heavier astronaut moved when the lighter astronaut has moved 12 m

A person suffering from anaemia gets tired

Jessica took a Mylar balloon outside on a very hot day. As she waited for the bus the balloon began to get bigger. What is the best explanation of this?

Describe how electricity flows through a simple closed circuit.