How many protons are in the radioactive isotope 40/19K?

What three things can happen to the radiation that earth receives from the sun?

A gas-filled weather balloon has a volume of 53.0 l at ground level, where the pressure is 751 mmhg and the temperature is 25.0 °c. after being released, the balloon rises to an altitude where the temperature is - 2.01 °c and the pressure is 0.

When all forces on an object are balanced, the object is in ... What?

A child moving at constant velocity carries a 2 N ice cream cone 1 m across a level surface. Is she doing work? a. Yes, because the force acts perpendicular to the direction of motion c.

What happen to the water when wet clothes dry

What is a radio interferometer? a device for correcting chromatic aberration in radio telescopes a device for absorbing and transmitting radio waves a network of several radio telescopes wired together a radio communication network joining several

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?