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A certain type of laser emits light that has a frequency of 7.3 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 4.0 × 10-11 s.
A flying monkey tries to bomb you with a coconut by dropping it when he's directly above you. How high above the ground was the silly monkey when he dropped the coconut?
A room has dimensions 2.82 m (height) × 4.62 m × 6.66 m. A fly starting at one corner flies around, ending up at the diagonally opposite corner. (a) What is the magnitude of its displace
The four tires of an automobile are inflated to a gauge pressure of 2.10E+5 Pa. Each tire has an area of 0.0277 m2 in contact with the ground. Determine the weight of the automobile.
What physical quantities are conserved in this collision?
A tank of water sits at the edge of a table of height 1.0 m. The tank springs a very small leak at its base, and water sprays out a distance of 1.2 m from the edge of the table. What is the water l
What is the force applied over a period of time that is required to give a stationery object momentum called?
A rectangular conducting loop of wire is approximately half-way into a magnetic ?eld B (out of the page) and is free to move. Suppose the magnetic ?eld B begins to decrease rapidly in strength. Wha
Calculate the wavelength of the resulting wave on the cable. Hint: This is a two part problem where you have to use the length.
For the band structure shown in Figure at 77k, what value of delta E gives the same number of electrons in the direct conduction band minimum as in the indirect conduction band minimum? Eg=2.3ev. As
100 lb block of ice slides down a frictionless plane inclined 30 degrees from the horizontal. what is the resultant force on the block?
You are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. How far away are the cliffs (in metric units)?
The electric field 6.5 cm from a small object points toward the object with a strength of 180,000 N/C. What is the object's charge?
steel rail than through the air where the speed of sound is 344 m/s at 20 oC? Hint: Calculate the speed of the wave in the two media and then take the difference between the two times.
One piston of a hydraulic lift holds 1.40x103 kg.The other holds an ice block (density = 917 kg/m3) that is 0.076 m thick. Find the first piston's area.
The frequency of a tuning fork is 358 Hz. Find the length of the shortest organ pipe which will give 6 beats/s with the fork. The velocity of sound in air is 339.1 m/s.
A particle (mass = 2.0 mg, charge = -6.0 µC) moves in the positive direction along the x axis with a velocity of 3.0 km/s. It enters a magnetic field of (2.0i + 3.0j + 4.0k) mT. What is the a
At a amusement park you went on a ride that malfunctioned. What was the angular displacement of the ride after 1.5s with an angular speed of 2.65 X 10^4 rads/s.
Find the minimal acceleration a of the block "A" along the horizontal so that masses 1 and 2 remain stationary with respect to the block "A".
A gymnast of mass 56.0 {rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 {rm m/s^2} for
The kinetic friction between the block and the surface is "u". Find the angle of the incline "a" so the block goes the minimal distance along the incline. Find the distance the block moves.
A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 12% of his body weight?
A ball is projected upward at time = 0.0 s, from a point on a roof 70 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is Consider all quantiti
A loop of area 0.07 m2 is rotating at 70 rev/s with the axis of rotation perpendicular to a 0.08 T magnetic ?eld. If there are 731 turns on the loop, what is the maximum voltage induced in it?
A 500.0 g pot of water at room tempature (20.0 degrees C) is placed on a stove. How much heat is required to change this water to steam at 100.0 degrees C?