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An electric heater consumes 1.8MJ when connected to a 250V supply for 30 minutes. Find the power rating of the heater and the current taken from the supply.
As you zip through space in your PPS (personal propulsion suit), your pulse rate, as you count it, is 117 bpm, How fast are you moving with respect to the Moon
A 1.4-kg playground ball is moving with a velocity of 3.0 m/s directed 30° below the horizontal just before it strikes a horizontal surface. compute the magnitude of the average resultant force on the ball
A 208 kg copper bar is put into a smelter for melting. The initial temperature of the copper is 300.0 K. How much heat must the smelter produce to completely melt the copper bar? (The specific heat for copper is 386 J/kg?K, the heat of fusion for cop..
A person with a mass of 95 kg and a volume of 0.101 m3 floats quietly in water. What is the volume of the person that is above water
suppose that protons are fired towards the large flat side of a charged conducting plate. initial speed of the protons
A beam of light propagating in glass (n=1.52) is incident on an interface with an unknown material. When the incident angle is exactly 62° the all of the light is reflected at this interface, but for smaller angles some light is transmitted. What is ..
Ships A and B leave port together. For the next two hours, ship A travels at 40.0mph in a direction 20.0 ?west of north while the ship B travels 45.0, What is the speed of ship A as seen by ship B
an astronauts pack weighs 12.1n when she is on earth but only 3.60n when she is at the surface of an asteroid.what is
The average lifetime of a muon is about 2 µs. Estimate the minimum uncertainty in the rest energy of a muon
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a highest of 90cm, what was the speed of the bullet at impact with the block.
Pandora Jewellery has turn into the best choice for ladies all more than the world who desires to express their personal style. The Pandora Bracelets provide a rich array of stylish diamond jewellery developed by artisans utilizing the finest mate..
A particle that has an 8.2 -μC charge moves with a velocity of magnitude 5.0x10^5 m/s along the +x axis. It experiences no magnetic force, although there is a magnetic field present.
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