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1. The light of incidents under the angle 60° from vacuum onto transparent medium. The anglr of refraction is 45°. what is the velocity of the light in this medium.
2. Dr broigle wave of electron in hydrogen atom is 0.5 10-10m. Calculate the velocity of electron.
3. The red helium-neon laser light incidents onto the surface of glass. What is the speed in the glass that has an index refraction of 1.50?
A 55 kg person riding a bike puts all her weight on each pedal when climbing on a hill. How could she exert more torque
A patient swallows a radiopharmaceutical tagged with phosphorus-32 (3215P), a ? - emitter with a half-life of 14.3 days. What is the total energy deposited in the body during the 5.5 days
Consider point P on the viewing screen of a double-slit experiment. This point is 75% of the way from the center of the third bright fringe to the center of the fourth bright fringe. If the wavelength of the light is 600 nm, what is the extra distanc..
Three point charges areplaced on the x-axis. Charge 1 is located at x = a and has a chargeof +5q, charge 2 is at x = 3a and has a charge of +3q, charge 3 is at x = 5a andhas a charge of +5q. A fourth charge is located on the y-axis at (0,a) and ha..
A hospital nurse walks 25 m to a patient's room at the end of the hall in 0.50 min. She talks with the patient for 4.0 min, What was the nurse's average speed
A wire with a resistance of 5.1 ? is drawn out through a die so that its new length is 3 times its original length. Find the resistance of the longer wire
Two coils of wire are placed close together. Initially, a current of 2.3 A exists in one of the coils, What is the mutual inductance of the two-coil system
A block of unknown mass is attached to a spring of force constant5.00 N/m and undergoes simple harmonicmotion and an amplitude of 10.0 cm. Determine the maximum acceleration of the block
A person walks first at a constant speed of 4.80 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 3.30 m/s. What is her average speed over the entire trip?
Suppose your weight has been constant, but then - after being introduced to really good chocolate - you start eating 100 extra food calories (recall, 1 food calorie is really 1kcal or 1000 calories of energy) every day without otherwise adjusting ..
A child's toy consists of a piece of plastic attached to a spring in the figure below. The spring is compressed against the floor a distance of 2.00 cm, estimate the force constant of the spring
The maximum induced emf in a generator rotating at 249 rpm is 44 V. How fast must the rotor of the generator rotate
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