A copper penny has a mass of 3.1 g and a volume of 0.35 cm3. What is the density of copper? Be sure to show your work and include units.

Name the type of particle formed by covalent bonds

Positrons are spontaneously emitted from the nuclei of

What are examples of medium?

A good hypothesis is in the following format ... A) Because ... B) What if? ... C) I think that ... D) If ..., then ...

Which statement about ocean surface currents is false? A) They have no effect on air temperature over land on the coast. B) They move heat and water between equatorial regions and polar regions. C) They flow in large gyres in the major ocean basins.

If you place 0◦C ice into 0◦C water in an insulated container, what will the net resultbe? Will there be less ice and more liquid water, or more ice and less liquid water, orwill the amounts stay the same? Explain.

At what speed would a car have to move in order to travel 20 kilometers in two hours?

Find the equivalent resistance Req between terminals a and b if terminals c and d are open and again if terminals c and d are shorted together. (Round the final answers to two decimal places.) With terminals c-d open, Req = Ω.

Which of these shows unbalanced forces at work on an object? A. an ice skater turning as he skates around an ice rink B. a bicycle chained to a bike rack at school C. a car driving at a constant 25 miles per hour on a straight street D.

A 4.25 kg block is sent up a ramp inclined at an angle theta=37.5° from the horizontal. It is given an initial velocity?0=15.0 m/s up the ramp. Between the block and the ramp, the coefficient of kinetic friction is? k=0.