(20 points! )
a piece of copper (c = 0.385 ) undergoing a temperature change from 150°c to 225°c absorbs 3,500 joules of energy. what is the mass of the piece of copper? express the answer to the nearest whole number.

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.