Jim measures the count rate of a sample of americium-241 as 120cpm. Roughly how long would it take for the count rate to fall below 4 cpm. Show your working

What is the definition of heterogeneous mixture

If the light completed the 71.0-km round trip in the time it took the mirror to complete one-eighth of a revolution, what is the speed of light?

Marge simpson decided to start a new garden in her backyard.

What happens to the temperature of the water inside the beaker after all of the ice melts? Why?

What type of volcano forms when there is a series of violent and gentle eruptions resulting in layering of lava and ash? a) cinder b) composite cone volcano c) shield volcano d) hot smoker volcano

Which statement about an electron in the 4d state is correct? A. The magnitude of its orbital angular momentum is 6√ℏ. B. The largest orbital angular momentum it could have in any given direction is 4ℏ. C.

A D note has a frequency of 587.33 Hz. Calculate its wavelength in meters. The speed of sound is 343 m/s

A cyclist allows his bike to roll down a hill without pedaling. Towards the bottom of the hill he applies his brakes. The bike comes to a stop. Applying the brakes causes the brakes to warm up. Describe the energy transfers that have occurred.

An object is placed in a fluid and then released. Assume that the object either floats to the surface (settling so that the object is partly above and partly below the fluid surface) or sinks to the bottom.

Explain why it is important to have strong core muscles?