A 235 g gold ball at a temperature of125°C is dropped into an insulated flask of water. The water was initially at a temperature of22°C. If the equilibrium temperature is 25°C, what is the mass of the water?

A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 290 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of + 3.

In most four-sroke internal combustion engines, when does the piston move downward?

5. In an A-frame house, the two congruent sides extend from the ground to form a 34° angle at the peak. What angle does each side form with the ground? 156 146 73 78

Which of the following observations demonstrates the differences between speed of light and speed of sound? (Note, they are all true, but which one represents the difference in the speed?)) A.

4. While broadcasting a football game, the announcer exclaimed, "I can't believe it. Carl James just scored a touchdown. That's right; I said Carl James. Even Carl looks as if he can't believe it either." What can you infer from these statements? A.

Which type of mass movement makes a pattern of wrinkles, or terraces, on hillsides? landside mudflow soil creep rock slide

How is sun related to nuclear, electromagnetic, and heat energy?

Studies of gymnasts show that their high rate of injuries to the Achilles tendon is due to tensions in the tendon that typically reach 12 times body weight.

The total mechanical energy of a system: A) can never be negative. B) is constant, if only conservative forces act. C) is either all kinetic energy or all potential energy, at any one instant.

If the torque on an object adds up to zero: A) the object could be accelerating linearly but it could not be turning. B) the object is at rest. C) the object cannot be turning. D) the object could be both turning and accelerating linearly.