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A beam of neutrons with a de Broglie wavelength of 0.260nm diffracts from a crystal of table salt, which has an interionic spacing of 0.280nm, What is the speed of the neutrons
An object is located 12.5 cm in front of a convex mirror, the image being 6.90 cm behind the mirror. How far in front of the mirror is the second object located
A container of volume V is divided by partitions into three parts containing one kilomole of helium gas, Calculate the kilomole fraction and the partial pressure of each gas in the mixture
A light ray with an incident angle of 38.5 degrees crosses from air to a solution and has an angle of refraction of 21.9 degrees. What is the speed of the ligth ray in the solution
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 530nm, What is the work function of this material
A light ray travels through medium #1 and crosses a boundary into water at an indicent angle of 21.8 degrees. what is the energy of one photon of this light
Donovan Bailey set a world record for the 100-m dash on July 27, 1996. find the time that was recorded on Earth
A scuba diver and her gear displace a volume of 70.0L and have a total mass of 73.1kg. What is the buoyant force on the diver in sea water
Suppose a 5.40 m diameter telescope were constructed on the Moon, what minimum separation between two objects
In constructing a large mobile, an artist hangs an aluminum sphere of mass 6.0 kg from a vertical steel wire 0.50 m long, compute the tensile Strain and elongation
A block of mass m =2.00kg is released from rest at h=0.300 m from the surface of a table at the top of a theta=50.0 degree incline as shown below. How far from the table will the block hit the floor
two blocks, each of mass m=2.80kg are hung from the ceiling of an elevator. If the elevator moves with an upward acceleration a of magnitude 1.9m/s^2, find the tensions T1 and T2 in the upper and lo
An individual is nearsighted; his near point is 16.0 cm and his far point is 47.0 cm. What lens power is needed to correct his nearsightedness
You are driving north on 107th Avenue at a speed of 32.3 mph. A police car whose siren produces a sound at a frequency of 513 Hz is approaching from the opposite direction at a speed of 61 mph, At w
A submarine is 2.95 multiply.gif 102 m horizontally from shore and 1.00 multiply.gif 102 m beneath the surface of the water. Find the height of the target above sea level
A guitar string is tuned to an E4, The concert pitch standard A440 has a frequency of 440 Hz. What is the wavelength of this pitch in air
A sign for the local cheese shop is hung by two strings of length 0.25 meters at either end from a 4 meter long pole with a mass of 200 kg. what is the coefficient of static friction between the wall
A cylinder contains a piston on each side of which is one kilomole of an ideal gas. The walls of the cylinder are diathermal, What is the change in the Helmholtz potential
A uniform rod of mass M and length L is sitting on a frictionless table. Describe the subsequent motion of the rod
A beam of unpolarized light shines on a stack of five ideal polarizers, Find the angle between the axes of each pair of adjacent polarizers
A dart is thrown horizontally with an initial speed of 16 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, How far away from the dart board is the dart released
The work fuction of a particular substance is 7.81*10^-19 J. What is the photoelectric cutoff wavelength for this material
A 188.0 g piece of lead is heated to 81.0oC and then dropped into a calorimeter containing 692.0 g of water that initally is at 21.0oC.
Sketch a vector diagram of the earth's magnetic field. The dip angle is 65 degrees, Determine Bearth by simple trigonometry
Two circular coils of current-carrying wire have the same magnetic moment. The first coil has a radius of 0.095 m, What is the radius of the second coil