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A person is 1.7 m tall. Where should he place the top of a mirror on the wall so he can see the top of his head? Assume his eyes are 4.5 cm below the top of his head. Find a minimal vertical distance from the level of the persons eyes to the top of the mirror.
If you wanted to develop a telescope, what kind of lenses would you use for the objective lens (the lens that collects the light) and the eyepiece? Explain your reasoning. Draw a picture with ray tracing of your setup.
question1a student who weighs 490 n is wearing a backpack that weighs 88 n. the student is standing still on level
You have a simple pendulum that's 1.4m long and has a 100g mass at the end. In Lewis Hall, what is the period of the pendulum? You then take this pendulum to the moon and measure the period again. What is the new period? Moon gravity is one sixth of ..
The weight of your 1205-kg car is supported equally by its four tires, What gauge pressure is required to give an area of contact of 112 cm2 for each tire
A mortar crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. find How long will the mortar shell remain in the air
Decide the speed a proton of charge +e should move towards a stationary nucleus of charge +e (we presume the nucleus doesn't move) so it is able to get within 1.0e-15 m before stopping
a block of mass m slides down a frictionless plane inclined at an angle with the horizontal. the gravitational force is
What is the highest possible induced emf in the antenna as it moves through the Earth's magnetic field.
One method for measuring the speed of sound uses standing waves. A cylindrical tube is open at both ends, and one end admits sound from a tuning fork. What is the speed of sound in the gas in the tube
The specific heat of a certain metal can be determined by measuring the temperature change that occurs when a piece of the metal is heated, What is the specific heat of the metal
Neutron stars are extremely dense objects that are formed from the remnants of supernova explosions. Many rotate very rapidly. Suppose that the mass of a certain spherical neutron star is 2.3 times the mass of the Sun and its radius is 25.3 km.
Two boxes of masses m and 2m are in contact with eachother on a frictionless surface and are pushed by a force F from the left
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