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According to the U.S. Energy Information Administration, the US used approximately 4.12 x 1012 kWh of electrical energy during 2010.
(a) If we could generate all the energy using a matter-antimatter reactor, how many kilograms of fuel would the reactor need, assuming 100% efficiency in the annihilation?
(b) Suppose the fuel consisted of iron and anti-iron, each of density 7800 kg/m3. If the iron and anti-iron were each stored as a cubical pile, what would be the dimensions of each cube?
A particle moves in a 15 cm radius circle cantered at the origin and completes 1.0 rev every 3.0 s. Find the speed of the particle. Find its angular speed ω.
A certain spring stretches 6 centimeter when a force of 6 Newton is applied to it. Suppose 5 kilogram mass is attached to the spring, Define equation for the position of the mass as a function of time
A person exerts a horizontal force of F = 190 N in the test apparatus. (h of arm = 0.34 m. And h of flexor muscle= .054 m) Find the horizontal force M that his flexor muscle exerts on his fore arm.
In a local bar, a customer slides an empty beer mug down the counter for a refill. What was the direction of the mug's velocity just before it hit the floor
A 15kg crate is moved along a horizontal floor by pulling on it with a rope that makes a 30 degree angle with the horizontal. The tension in the rope is 200N and the crate slides a distance of 10m.
a ball starts from rest and rolls down a hill with uniform acceleration traveling 150 m during the second 5.0 s of its
1 a hydrogen atom undergoes a transition from the n 12 state to the n 5 state. explain why it emits a photon during
Electrons in an x-ray tube are accelerated through 105 kV and directed toward a target to produce x-rays. Calculate the power of the electron beam in this tube
Identifying the three types of qualitative research most appropriate for DBA
An inquisitive physics student and mountain climber climbs a 55 m cliff that overhangs a calm pool of water. She throws two stones vertically downward 0.8 s apart and observes that they cause a single splash.
q1. three objects with masses m1 54.6 kg m2 38.8 kg and m3 20.0 kg are hanging from ropes that run over pulleys.
A small piece of rock is weighed in air and then weighed while immersed in oil of density 800 kg/m3. If the weight in air is 21.5 N and the weight in the oil is 11.8 N, calculate the density of the rock
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