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

A. Describe what happens to the molecules of water as water goes from ice to liquid to vapor B. Explain what happens to the temperature during and between these phase changes

How much force does it take to stop a 1,000 kg car traveling at 20 m/s in 10 seconds?

If the tire reaches a temperature of 48 ∘c, what fraction of the original air must be removed if the original pressure of 250 kpa is to be maintained?

What are the 3 types of waves

Which of the following is not a carbohydrate? A. Cellulose B. Sugars C. Starches D. Cholesterol

Two capacitors are identical except that they have different insulators in the gap between the conductors. Capacitor A has an air filled gap while capacitor B uses a material with dielectric constant 3 to keep the conductors apart.

The intensity of the sun's radiation incident upon the earth is about i=1.4kw/m2. suppose this is the value for the intensity of sunlight incident upon the satellite's solar panels. what is the total solar power p absorbed by the panels?

Which possible discovery would be attributed to an inorganic molecule? a protein that contains more energy than lipids a fireproofing spray used in firefighting a new energy-efficient fuel source a synthetic polymer that resists degrading

A light beam in air strikes the surface of water at an angle of 26° with the normal. When it enters the water it bends toward the normal, making an angle of 19° with it. The velocity of light in air is approximately 300,000 km/s.

Which best explains the relationship between the speed of sound and the medium through which it passes?