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An irregularly shaped chunk of concrete has a hollow spherical cavity inside. The mass of the chunk is 41.5 kg, and the volume enclosed by the outside surface of the chunk is 0.256 m3. What is the radius of the spherical cavity?
You run a microwave for 6 minutes together with a 1500 W boom-box and a 2800 W space heater. What is the power of your microwave
An automobile battery has an emf of 12.2 V and an internal resistance of 0.088 omegacap.gif. What is the potential difference across the headlight bulbs when they are the only load on the battery
A satellite with mass 2200kg is initially in a circular orbit a distance 325km above the earth's surface. Due to air drag, the satellite's altitude decreases to 250km. Calculate the change in gravitational potential energy
An ambulance moving at 36 m/s sounds its siren whose frequency is 350 Hz. What frequency does a person in the car hear as the ambulance approaches the car
A uniform wooden plank of mass 15kg and total length 10m rests on two supports. Find the forces of the two supports on the plank
Two identical capacitors are connected in parallel to an ac generator that has a frequency of 579 Hz and produces a voltage of 24 V. What is the capacitance of each capacitor
A 1000 kg car carrying four 84 kg people travels over a %u201Cwashboard%u201D dirt road with corrugations 3.8 m apart, by how much does the car body rise on its suspension
A 50.0 ball of clay traveling east at 8.00 collides and sticks together with a 40.0 ball of clay traveling north at 8.00. Illustrate what is the speed of the resulting ball of clay?
A hollow, spherical shell with mass 2.40 kg rolls without slipping down a slope angled at 39.0 degrees. Find the friction force
Forces in a Three-Charge System Coulomb's law for the magnitude of the force between two particles with charges and separated by a distance is , where , and is the permittivity of free space.
Explain how fast must the candy bar travel to have the same 106 joules in the form of kinetic energy?
A small, 300g cart is moving at 1.40m/s on an air track when it collides with a larger, 5.00kg cart at rest. What is the speed of the large cart after the collision
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