A student heats a piece of aluminum, with specific heat 0.900 J/goC, in a large beaker of boiling
water until the aluminum is 100°C. The mass of this particular piece of aluminum is 5 grams.
If the student places the 5-g piece of aluminum in an insulated styrofoam cup with 150 mL (150
grams) of water at room temperature (23.C), what is the final temperature of the aluminum
and this water going to be? Assume that we can neglect the heat capacity of the styrofoam cup
and thermometer.

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c. m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?