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How much does it cost to cook food in a 12,000 W oven for 47.6 minutes? Assume electricity costs 8.0 cents per kW·h. Give your answer in dollars, but do not include the dollar sign.
A 54 {rm kg} ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.5 turns each second. The distance from one hand to other is 1.5 {rm m}. Biometric measurements indicate that each hand typically..
a 16.0 g bullet is shot into a wooden block at rest with mass 4550 h on a frictionless surface. the block moves 1.20 m/s after the bullet strikes and becomes lodged in the block, find the speed of the bullet before striking the block
The mass of a robot is 4340 kg. This robot weighs 3000 N more on planet A than it does on planet B. Both planets have the same radius of 2.37 × 107 m
A .450 kg ice puck, moving east with a speed of 3m/s, has a head-n collision with a .900 kg puck initially at rest. Assume a completely elastic collision, what will be the speed and direction of each object after collision.
What is moment of inertia
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. (a) Assume that the Earth is a conducting sphere with charge on its surface.
An airplane must reach a speed of 172 mi/h to take off. If the runway is 470 m long, what is the minimum value of the acceleration that would allow the airplane to take off productively.
Find the magnitude of the maximum force applied horizontally to upper block (block 1) that will cause the two blocks to slide together.
find frequencies of vibration of the piano wire. Car 1 has 3 times the mass of car 2, but only 0.5 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
The mass density of an object is 16.0 g/cc, and its mass is determined to be 134 g. What is the volume of the object
A block of mass m1 = 0.57kg is placed on top of another block of mass m2 =0.97kg, What minimum coefficient of static friction between the two blocks will prevent the upper one from slipping
A railroad car of mass 40900 kg moving at 3.35m/s collides and couples with two railroad cars,each of the same mass as the single car and moving in the same direction at 1.53m/s. what is the speed of three cars after the collision.
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