A radioactive isotope of potassium has a half-life of 20 minutes if a 40 g sample of this isotope is allowed to decay for 80 minutes how many grams of the r

adioactive isotope will remain

Describe matter in ur own words

The energy carried by a wave is dependent upon its wavelength, frequency, and amplitude. So long as speed is constant, the energy of a wave will increase as a result of an increase in which of these characteristics?

A ball is dropped from the top of a cliff 651 m high. How long does it take the ball to hit the ground at the bottom of the cliff, in seconds?

Butter is an example for liquid in solid or solid in liquid

How did an increase in mass or decrease in force affect the velocirt of the ball

A distance-time graph indicates that an object moves 100m in 4s and then remains at rest for 6s. What is the average speed of the object?

Resistance describes a materials ability to

A student performing a double-slit experiment is using a green laser with a wavelength of 590 nm. She is confused when the m = 5 maximum does not appear. She had predicted that this bright fringe would be 1.

1. How fast must a truck travel to stay beneath an airplane that is moving 105 km/h at an angle of 25° to the ground?

Is a chipmunk a producer