Which of the following is a scientific question that can be answered through experimentation? a. When looking at a map, you ask, c. When sitting with friends in class, you ask, "How
"How are the borders of
many protons does an atom of iron have?"
Germany determined?"
b. When talking to your teacher, d. When looking at a building, you ask, "Will the materials used
you ask, "What is the definition in this building withstand acid rain?"
of matter?"

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

What is the magnitude of the gravitational force acting on the earth due to the sun?