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Question: When two moles of hydrogen and one mole of oxygen react to form two moles of water, the energy released is 485 kJ. How much does the mass of the elements decrease in this reaction?
What % of the total original mass of the system does this mass change represent?
A planet with a radius of 6.68 ×107 m has a gravitational field of magnitude 34.2 m/s2 at the surface. What is the escape speed from the planet
A 6.30 kg block is pushed 9.45 m up a smooth 40 degree inclined plane by a horizontal force of 70 degrees north. Calculate the final kinetic energy of the block
The amount of carbon- 14 in an ancientwooden bowl is found to be one-half that in a new piece ofwood. How old is the bowl
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 2.40 104 s. What is the speed at which the satellite travels?
Two parallel wires 10 cm apart carry currents of 18 A. What is the magnetic force between two wires for both case
The ladder of the lunar lander was approximately 10ft high. If Neil Armstrong had fallen out of the lander while on the moon, Calculate the acceleration due to gravity on the moon
question1a puck of mass m1 76.0 g and radius r1 4.40 cm glides across an air table at a speed of 1.50 ms. it makes a
Two identical light bulbs of 60w and 120v are connected in parallel and these arre then connected across a 120v power source
Three identical point charges (q1=q2=q3=5.0 nc) are located at three corners of a square with 1.0 cm each side, find the potential energy U of the electron
what volume should the balloon have after being inflated. Billiard ball A of mass mA=0.400kg moving with speed vA=1.80m/s strikes ball B, initially at rest of mass mB=0.500kg. As a result of collision, ball A is deflected off at an angle of 30.0 deg..
A uniform magnetic field B is perpendicular to the plane of a circular loop of radius r. Find the emf in the loop as a function of time
A 73.7-kg person puts on a life jacket, jumps into the water, andfloats. What is the density of the life jacket
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