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The sound intensity 59 m from a wailing tornado siren is 0.11 W/m2. (a) What is the intensity at 1190 m? (b) The weakest intensity likely to be heard over background noise is 1 µW/m2. Estimat
(a) The maximum restoring force that can be applied to the disk without breaking it is 40,000 N. What is the maximum oscillation amplitude that won't rupture the disk? (b) What is the disk's maximum
The position of a 50 g oscillating mass is given by x(t) = (2.0 cm) cos(5t), where t is in seconds. Determine the following. (a) The amplitude. (b) The period. (c) The spring constant. (d) The maxim
Orbiting the Earth with a 6.5 meter primary mirror, it will utilize a camera that is able to take infrared images. Using light whose wavelength is 2.2 ?m, what is the smallest crater on the Moon tha
What is the algebraic expression for the magnitude a of the acceleration that a charge experiences when placed in an electric field? Express your answer in terms of the magnitude |q| and mass m of t
A particle of charge +13 µC and mass 2.50 10-5 kg is released from rest in a region where there is a constant electric field of +270 N/C. What is the displacement of the particle after a time
Two 1.7 kg masses are 2.0 m apart (center to center) on a frictionless table. Each has +1.0 µC of charge. (a) What is the magnitude of the electric force on one of the masses?
According to the Guinness Book of World Records, the longest home run ever measured was hit by Roy "Dizzy" Carlyle in a minor league game.
The position of an object moving in a straight line is given by x= 5+3.0t - 40t^2 -20t^3, where x is in meters and t in seconds. What is the object displacement between t=2 and t = 4s?
A 100 kg car traveling at 20 m/s collides with a 100 kg car traveling at 8 m/s in opposite direction, What percentage of the original kinetic energy of this?
A 1.5 kg object initially at rest is raised to a height of 10 m by a force of 40 N. What is the velocity of the object at this height ? What time is needed for this motion ? What is the total work
A shell is fired at an angle of 20 degree above the horizontal at a velocity of 200 m/s a) what is the range? b) What is its velocity at highest point of the trajectory?
A 100 kg car travelling at 20 m/s collides with a 100 kg car traveling at 8 m/s in opposite direction, a) if the two cars stick together , what is their final velocity ? b) how much kinetic energy
What force must be applied to 5kg object to move it downward with acceleration 1 m/s^2 ? What is the direction of the applied force ?
A shell is fired at an angle of 20 degree above the horizontal at a velocity of 200 m/s. What is its velocity at highest point of the trajectory?
Explain how medical magnetic resonance imaging (MRI) exploits the magnetic properties of the nucleus. Explain how a sound is actually a form of energy? In what medium do sound waves travel?
Suppose a cube of aluminum which is 1.00 cm on a side accumulates a net charge of +3.10 pC. (a) What percentage of the electrons originally in the cube was removed?
Find the force exerted by these charges on a fourth charge q = +3 nC at the remaining (upper right) corner. (Assume the +x axis is directed to the right and the +y axis is directed upward.)
2.0 kg block is attached to a spring with spring constant 22 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 46 cm/s. (a) What
A spring with spring constant 15.0 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 3.0 cm and released. If the ball makes 55 oscillat
The position of a 50 g oscillating mass is given by x(t) = (2.0 cm) cos(5t), where t is in seconds. Determine the following. (a) The amplitude. (b) The period. (c) The spring constant. (d) The maxi
Let P be a point on the peripheryof the front wheel. One can show that the x and ycoordinates of P are described by the following functions of time and Determine the expressions for the velocity, sp
A flat metal washer is heated. As the washer's temperature increases, what happens to the hole in the center? A flat metal washer is heated. As the washer's temperature increases, what happens to th
The Young's modulus for wire A is 1.80 x 1011 Pa and for B is 1.20 x 1011 Pa. If the weight suspended from wire A is 2.00 kg, what would the weight attached to wire B need to be to produce a) equal
A solid lead cylinder and a solid platinum cylinder have the same mass. What is the ratio of the length of the platinum cylinder to the length lead cylinder if their diameters are the same?