# Urgent! Physics Help!

1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...

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1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...

1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...

At a building site, an iron girder of mass 400 kg is suspended from a crane by a steel cable. Assume that the cable has a circular cross-section of diameter 24 mm. a.What is the tensile force...

A. New Delhi B. Mumbai C. Allahabad D. None of these

So, I have been watching a lot of videos on physics, and a few of them have eluded to the fact that light has momentum. For instance, minutephysics video "E=MC2" is incomplete states that...

1. What is Archimedes' Principle? Explain how Archimedes' principle is used to find the density of a solid. ...

1. A string is under a tension of 750.0 N. A 1.7 m length of the string has a mass of 4.8 grams. What is the speed of a transverse wave of wavelength 0.50 m in this string? What is the frequency of...

1. Given that the specific heat of water is 1.00 cal/(g*C), what is the specific heat in Joules/(kg*K)? 2. If 700 grams of a metal requires 95 calories of energy to raise its temperature...

Assume the speed of sound is 331 m/s. 1. You have an open tube that is 1.3 m long. a. What is the fundamental frequency and wavelength of the tube? b. What is the third harmonic...

Most of the frozen ice in a comet's ______ vaporizes after the comet's many trips around the sun. The Sun produces energy by fusing hydrogen atoms, into _____ atoms in its core. Planets...

(a) the gold ball acting on the wooden ball ? (b)the wooden ball acting on the gold ball .

1. Make two free body diagrams for a falling coffee filter: one at the instant when it is released and the other after it has reached terminal velocity. Your diagrams should include numerical values...

1. What kind of collision does conserve momentum? What kind of collision does not conserve mechanical energy? 2. A bullet with a mass of 52 grams moving with a speed of 100 m/s slams...

A. What is the period of rotation? B. What is the velocity if the object is 14 cm from the center of rotation? C. What is the centripetal force on a 35 g mass spinning 14 cm from the center...

A 60 cm tall red rose is placed 40 cm from a large convex lens of focal length 20 cm. Locate the position of the image by means of a ray diagram Locate the position of the image by means of...

A candle is placed 15 cm from the vertex of a concave mirror that has a focal length of 10 cm.

When a butterfly of body length 4.2 cm is 10 cm from a concave mirror, its image is 15 cm behind the mirror.

Light from a star is collected by a concave mirror. How far from the mirror is the image of the star if the radius of curvature is 150 cm?

If laser beam hits the bullet proof Lexan glass of a bank with an angle of 45 degrees. If the index of refraction for Lexan is 1.585 and the index of refraction for air is 1.000293, What is the angle...

1. Cart A has a mass of 265 grams. Cart B has a mass of 445 grams. The carts are on a frictionless track. Cart B is initially at rest. Cart A is initially moving towards Cart B at a...

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