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A crystal is irradiated with X-ray photons with energies of 1.65 × 10-15 J. The atomic planes in the crystal are separated by 0.21 nm. At what angles of incidence will the X-rays reflect from the crystal?
A rocket is launched at an angle of 52° above the horizontal with an initial speed of 103 m/s. The rocket moves for 3s along its initial line of motion with an acceleration of 32 m/s2. At this time, its engines fail and the rocket proceeds to move..
a u-tube contains mercury with a density of 13,600 kg/m^3. it is open on one end, and the other end is connected to a boiler, what is the gauge pressure at point A in the boiler
Object A with mass 9*mo is moving in positive x direction at speed of 0.8c. Object B with mass 1.2*mo is moving toward negative x direction with speed of 0.6c, Find the kinetic energy of the system before and after the collision
At a given time, t_0, sample A contains 750,000 radioactive nuclei. During the 1 hour before t_0, a total of 280,000 decays were observed from this sample. Calculate the half-life of the radioactive material
The magnitude of vector vector A is 31.6 units and points in the direction 321° counterclockwise from the positive x-axis. find out the x-component of this vector.
For light that originates within a liquid and strikes the liquid/air interface, What is Brewster's angle for this light
A long, straight wire of length 1.3 m carries current I = 3.1 A. what is the magnitude of the force on the wire
A Piece of balsa wood, with density: 0.12g/cm^3, with mass of 30g in air is affixed to alead sinker with a mass of 400g. What will be the apparent mass of this system when immersed in water
A dc motor is connected to a constant emf of 13.9 V. The resistance of its windings is 2.0 ?. What current does it draw at normal operating speed
A public transportation bus makes the position-time graph over a 5.00 hour interval shown below. What is the average velocity (magnitude and direction) of the bus
q1. a dentists drill starts from rest. after 3.30 s of constant angular acceleration it turns at a rate of 2.6 104
a handball is hit toward a wall with a velocity of 13.7 ms in the forward direction.it returns with a velocity of 11.5
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