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This is a conceptual question, The fundamental source of asound wave is a vibrating object, what is the fundamental source of an electromagnetic wave? Please explain it so a regular joenot taking physics could understand it.
A fire truck attaches two fire hoses to a hydrant to fight a fire. each hose has a diameter of 20 cm. How many kilograms of water are put on the fire in 30 minutes
A person weighs 75 N on the surface of the moon and 427 N on the surface of the Earth. What is the acceleration of gravity on the surface of the moon
Find the final velocity of the two balls if the ball with velocity v2i = ?20.9 cm/s has a mass equal to half that of the ball with initial velocity v1i = +32.1 cm/s. (Indicate the direction with the sign of your answer.)
Suppose an electron is accelerated from rest through a difference in potential of V = 4.6 V. Find the speed of the electron after the collision
Show that the Earth's orbit will be a parabola (and so the Earth will escape to infinity) and If the Sun's mass suddenly doubles, what will be the Earth's orbital period?
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 2.85 multiplied by 10-4 m3, What mass of gold is contained in the rock
The lenses of a particular set of binoculars have a coating with index of refraction n=1.38, and the glass itself has n=1.52. what is the minimum thickness of the coating
A 75.0 kg stunt man jumps from a balcony and falls 26.5 m before colliding with a pile of mattresses. what is the average force exerted by the mattresses on the stuntman
A laser beam is incident on two slits 0.100 mm apart and a screen is placed 4 m from the slits. An interference pattern appears on the screen. what is the wavelength of the laser light
The light emitted by a helium-neon laser has a wavelength of 632.8 nm in air. As the light travels from air into fused quartz, determine the wavelength in fused quartz
A rapidly spinning paddle wheel raises the temperature of 200mL of water from 21 degrees Celsius to 25 degrees. How much a) work is done and b) heat is transferred in this process
An object is placed directly between a large planet and a star. Find the distance from the planet for which the net gravitational force exerted by the planet and by the star on this object is zero. DATA: Mstar= 1.90E+30 kg, Mplanet= 6.90E+25 kg, Dpla..
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