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Question 1: Atoms
a. Identify two attractive forces at work in an atom, and identify the kinds of particles each force acts between.
b. Identify the element whose atoms have 12 protons. Is it a metal, a nonmetal, or a metalloid? How does an atom of this element change when it forms an ionic bond?
Question 2: Fluids
A robotic submersible is being brought back on board a ship. What happens to the tension in the cable as the submersible is lifted out of the water? Write sentences to explain your reasoning.
Question 3: Heat
a. If 0.45 kg of iron at 140°C is added to 1.5 kg of water at 22°C, what will be the final temperature of the system?
b. Write sentences describing how to recognize an exothermic reaction and how the energy of the products of an exothermic reaction compares with the energy of the reactants. (4 points)
c. The temperature of a substance does not change as it condenses. Write sentences to explain why this happens at a molecular level.
A Physics instructor, dissatisfied with his salary and looking for a thrill, performs motorcycle stunts in his spare time. where does the rider strike the other side of the cliff
neutrons of 1.5 mev energy are introduced at the rate of 2x1015 neutronscm3sec into an infinite slab of graphite.
Which could potentially reason you the greater injury; being tackled by a light-weight, fast-moving football player, or being tackled by a player with double the mass however moving at half the speed?
Look at the thin soap film interference pattern in the picture for conceptual question 28-11. Why are the colors in horizontal stripes instead of circles or crazy swirls or vertical stripes?
A metallic sphere has a charge of +3.7 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 7.2 109 electrons are transferred. What are the charges of the sphere and the rod now?
A rocket is projected upward from the earth's surface (r = RE) with an initial speed v0 that carries it to a distance r = 1.4 RE from the center of the earth. What is the launch speed v0
how many turns should a solenoid of cross-sectional area 0.035 m2 and length 0.39 m have if its inductance is to be 48
What is the mass of the child and basket if a scale reading of 102 N is observed? What is the tension T in the cord attaching the child to the scale?
A mass m=4.5 kg is attached to the vertical spring with k=200 N/m and is set into motion. what is the maximum value of the velocity
a) What is the spring constant for this spring? b) Another mass of 52.0 g is added to the spring. What is the reading on the ruler now?
A car accelerates uniformly from 0 to 72 km/h in 11.5 seconds. a) What is the acceleration of the car in m/s2?
Electric Field Mapping? A) In an experiment you will have carbon paper with silver electrodes painted on them. The paper acts like an insulator and the electrodes act like conductors. What should the field be inside the conductors? What about the pot..
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