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The mass of container is 50 g when it is empty. When we complete this container with water, its mass is becoming 130 g. If we unload half of this water and put a liquid which its density is 2 g/cm3 instead of this water, find the sum of the mass of this container (density of water is 1 g/cm3).
A railroad car of mass 3.0 104 kg moving at 4.00 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
Consider 10 air molecules in an otherwise empty room. Find the probability that exactly four molecules are in the front third and exactly six in the top half, exactly three molecules are both in the front third and the top half (that is, the same mol..
A 0.31-kg stone is held 1.4 m above the top edge of water well and then dropped into it. The well has a depth of 4.8 m. what is the gravitational potential energy of the stone-Earth system when it reaches the bottom of the well
a projectile is launched at speed vo from the foot of an incline that makes angle theta22.0 degrees relative to the
A 13 cm long, 9 mm diameter string was found to stretch 4.9 mm under a force of 11 N. The string breaks at a force of 40 N. What is the ultimate strength of the string? What is the modulus of elasticity of the string?
question the hobby-eberly telescope in fort davis texas is the largest optical telescope in north america. the primary
A point on the surface of a solid sphere (radius = 0.806 m) is attached directly to a pivot on the ceiling. The sphere swings back and forth as a physical pendulum with a small amplitude. What is the length of a simple pendulum that has the same peri..
A ranger in a national park is driving at 32.0 mi/h when a deer jumps into the road 200 ft ahead of the vehicle. What is the maximum reaction time allowed
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 476 m/s
What are momentum and anguLar momentum? What do they have to do with motion and the orbits of the planets? What factors control the gravitational forces objects exert Oa each other?
A projectile is fired straight upward from the Earth's surface at the South Pole with an initial speed equal to one third the escape speed. What is the altitude of the projectile at this instant
A 12.0- shell is launched at an angle of 55.0 above the horizontal with an initial speed of 150. how much energy was released in the explosion
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