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A film of MgF2 (n = 1.38) having thickness 1.68 10-5 cm is used to coat a camera lens.
(a) What are the three longest wavelengths that are intensified in the reflected light?
The three ropes are tied to a small, very light ring. Two of these ropes are anchored to walls at right angles with tensions T1 = 35 N andT2 = 70 N. What are the magnitude and direction of the tension Tvec3 in third rope.
The period of motion of an object-spring system is T = 0.546 s when an object of mass m = 254 g is attached to the spring, Find the frequency of motion in hertz
The threshold intensity for a human eye to sense the presence of light is 50 photons falling on the retina within a period of 0.1 s. Estimate how far away the star can be away
For one of the measurement you will be using a hanging mass of M=150 grams. Determine the expected frequency f2 of the second harmonic standing wave
a rock is thrown downward from the top of a building 168 ft high at an angle of 60 with the horizontal. how far from the base will the rock land
A particular atomic energy state is characterized by a principle quantum number n = 4. How many orbital subshells are possible
Throughout a hard sneeze, your eyes may shut for 0.44s. If you are driving a car at 98 km/h during such a sneeze, how far does the car move during that time.
A system of 1219 particles, each of which is either an electron or a proton, has a net charge of -6.640×10-17 C. How many protons are in this system (exactly)
A patients blood pressure is measured as 140 / 80, measured in level with the heart. What would you expect the blood pressure to be at the top of the head if there is a 45cm height difference in the two points. Density of blood is 100kmm-3. Give r..
Starting from rest, a 98-kg firefighter slides down a fire pole. How far did he slide down the pole
A 50.0kg pole vaulter running at 10.0m/s vaults over the bar. Assume that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the jump.
Suppose a car's brakes can produce an acceleration of -7 m/s2. what is the minimum distance necessary to stop the car
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