A dummy is fired vertically upward from a cannon with a speed of 40 m/s. How long is the dummy in the air? What is the dummy's maximum height? sdsdsdsdsdsdsdsdsdsd
A dummy is fired vertically upward from a cannon with a speed of 40 m/s. How long is the dummy in the air? What is the dummy's maximum height? sdsdsdsdsdsdsdsdsdsd
distinguish between noise and music
A heat pump is used to keep a house warm at 22 degrees Celsius. (a) How much work is required of the pump to deliver 2900 J of heat into the house if the outdoor temperature is 0 degrees...
A 10-g sample of a cookie is allowed to dry before putting it in a bomb calorimeter. The aluminum bomb has a mass of 0.615 kg and is placed in 2.00 kg of water contained in an aluminum calorimeter...
The value of specific heat for copper is 390 J/kg⋅C°, for aluminum is 900 J/kg⋅C°, and for water is 4186 J/kg⋅C°. (a) What will be the equilibrium temperature in degrees Celsius when...
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...
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...
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. 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...
Distinguish between loudness and intensity of sound.
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...
A helicopter of mass 2500 kg carries a bucket of water to fight a wildfire.The total mass of the bucket is 2000 kg.the helicopter accelerates horizontally and the suspension cord makes an angle of...
(a) the gold ball acting on the wooden ball ? (b)the wooden ball acting on the gold ball .
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 calcium ion Ca++ enters with zero velocity a region of uniform electric field of 200N/C pointing east. What is its speed after 50ms? (Symbol of calcium atom is 20Ca40)
A candle is placed 15 cm from the vertex of a concave mirror that has a focal length of 10 cm.
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...