The temperature of a sample of iron with a mass of 10.0 kg changed from 50.4°C to 25.0°C with the release of 47000 J of heat. What is the specific heat of iron?

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.