A 500. gram sample of nickle-63 has a half-life of 100. years and has decayed for 500. years. How much of the original 500. gram sample remains?

87.1 grams

574 grams

16,000 grams

15.6 grams

True/False: Paraphrasing Einstein's Theory of General Relativity, gravity "handprint" makes an "indentation" in the fabric of space and time. A. True B. False

What was the vertical component of her acceleration during push-off? the positive direction is upward?

Arrange the three mediums in order of least to the most density Vegetable oil, water, plexiglass

What do refrigerators and air conditioners use to move heat?

A closed, rigid 2.5 L flask contains a mixture of Ne (g) and F2 (g) with a total pressure of 3.32 atm at 0oC. The system is heated to 15oC. The change in entropy for this process was 0.345 J/K. What is the XNe in the flask

What is transferred by electromagnetic waves?

Which will change if you turn up a radios volume

If the power developed in an electric circuit is doubled the energy used in one second is

A substance has a density of 13.5 g/cm3. What is the volume of a 50 g block of this substance?

Select all of the answers that apply. Which statements are true regarding the scientific evidence supporting the big bang theory? Researchers found cosmic microwave background radiation, which is a heat imprint left over from the big bang.