4. A 50.0 kg shell is fired from a cannon on Earth's surface to a maximum height of 400 m. What is the potential energy?
a. 185,000 J
b. 170,000 J
c. 196,000 J
d. 190.000 J

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.

The particles that are found in the nucleus of an atom are