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A block of unknown material is submerged in water. Light in the water is incident on the block at an angle of 31°. The angle of refraction in the block is 27°. What is the index of refraction of the unknown material?
A hand bicycle pump should compress air from atmospheric pressure to the pressure inside the tire (usually 5 or 6 atmospheres). Please estimate the temperature of the air as it enters the tire.
a cameraman on a pickup truck is traveling westward at 17 kmh while he videotapes a cheetah that is moving westward 25
A proton is initially at rest at a point where the potential is 455V. Sometime later the proton is at a point where the potential is 191V. If no force but the electrostatic force acts on the proton, what is its final kinetic energy.
During liftoff, a hot-air balloon accelerates upward at a rate of 3.4 . The balloonist drops an object over the side of the gondola when the speed is 17, How long does it take to hit the ground
A positively charged particle of mass 7.21E-8 kg is traveling due east with a speed of 85.3 m/s and enters a 0.340 T uniform magnetic field. The particle moves through one-quarter of a circle in a time of 2.30E-3 s, at which time it leaves the fie..
a bread box is made to move along an x axis from x 0.15 m to x 1.20 m by a force with a magnitude given by f e-2x2
monochromatic light(wavelength= 500 nm) passes through two splits and onto a screen 2.5 m away. what is the new distance between bight fringes
A recently developed method to study brain function is to produce arapidly changing magnetic field within the brain. When thistechnique, known as TMS, is applied to the prefrontal cortex, forexample, it can reduce a person's ability to conjugate v..
The width of the contact of each wire with your skin is 1.10 cm and the thickness of the conducting layer of your skin is 0.023 mm, calculate the resistivity of your skin
An alpha particle travels at a velocity of magnitude 420 m/s through a uniform magnetic field of magnitude 0.061 T. compute the magnitude of the acceleration of the particle
what is significant about the vertical velocity when the projectile is at its maximum height?do we consider air
A stone is dropped into a well. The sound of the splash is heard 2.30 s later. What is the depth of the well
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