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A plane mirror made of a very thin piece of glass lies flat on the ground. As shown in the following figure, one end of the mirror is 2.1 m from you and the other end is 40 m from a nearby tree. You are1.4 m tall, and the mirror has a length L. The mirror is arranged so that you can now see the image of the top of the tree at one edge of the mirror.
1) How tall is the tree?
2) If you can now see a point halfway up the tree at the other edge of the mirror, what is L?
In a photoelectric effect experiment, visible radiation of energy 2.91 eV is incident upon a metal of work function 1.66 eV. find the maximum kinetic energy of the ejected photoelectrons
Consider an object on an incline where friction is present. The angle between the incline and the horizontal is ?, Find an expression for the acceleration of this object. Treat down the incline as the positive direction
An electron is released from rest at the negative plate between two 10.0 cm long parallel plates separated by 1.00 cm, What is the electron's velocity when it strikes the other plate
Identify three examples of 19th century Impressionist painting or sculpture and three Post-Impressionist works. Explain how the six pieces of art fall into these two styles.
The escape speed from the Earth is 1.12*104 m/s, so that a gas molecule travelling away from Earth near the outer boundary of the Earth's atmosphere would, at this speed, be able to escape from the Earth's gravitational field and be lost to the atmos..
a 480 kg car moving at 14.4 ms hits from behind another car moving at 13.3 ms in the same direction. if the second car
A 2inx4inx8ft is leaning against the wall, draw afree-body diagram of forces on it. what would be the minimum angle of the wooden bar with the floor
A note of frequency 700 Hz. has an intensity of 5.0E-06 W/m^2. What is the amplitude (in meters) of the air vibrations caused by this sound
An object moves up and down y-axis with an acceleration given as a function of time t by the expression a = A sin ω t, where A and ω are constants. What is the period of this motion.
You are driving at a speed of 25m/s eastward along a levelroad at night. Suddenly you see the shining eyes of a deer standingin the road way ahead. what was the average acceleration applied by your brakes
A 22.5-microF capacitor is charged by a 147.0-V power supply, Calculate the energy stored in the inductor at t = 1.30 ms
A violin is tuned by adjusting the tension in the strings. OnBrian’s violin, the “A” string is tuned to aslightly lower frequency than Andrew’s, which is correctlytuned to 440.0 Hz.
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