Consists of electric and magnetic disturbances, or waves, that travel through space. human eyes see one form of this energy, called all forms of electromagnetic radiation, including x-rays and radio waves, make up the each type of radiation can be classified in two ways. the distance between the peaks on a wave and is the number of waves that occurs each second. scientists study radiation with telescopes which collect and focus light. the - the opening that gathers light in a telescope, the more light that can be collected.
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Physics, 22.06.2019 00:40
The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.
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Physics, 22.06.2019 08:30
An object weigh 40n in air ,weigh 20n when submerged in water,and 30n when submerged in a liquid of unknown liquid density.what is the density of unknown of liquid?
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Physics, 22.06.2019 18:30
Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.
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Physics, 23.06.2019 00:30
What is the largest meteoroid that has collided with this planet
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Consists of electric and magnetic disturbances, or waves, that travel through space. human eyes see...
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