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You are standing in front of a lens that projects an image of you onto a wall 3.00 meter on the other side of the lens. This image is three times your height.
A) Determine how far are you from the lens?
B) Calculate the focal length of the lens?
Your friend has a near point of 112 cm, and she wears contact lenses that have a focal length of 34.6 cm. How close can she hold a magazine and still read it clearly
A steel pipe 22 m long, installed when the temperature was 15°C, is used to transport superheated steam at a temperature of 125 °C. Steel's coefficient of linear expansion is 1.2 × 10-5 K-1. The pipe is allowed to expand freely when the steam is tran..
The drawing shows a device that can be used to measure the speed ofa bullet. The device consists of two rotating disks, separated by adistance of d = 0.750 m, and rotating with an angular speed of 70.0rad/s.
An x-ray photon is scattered from a free electron (mass m) at rest. The wavelength of the scattered photon is ?', and the final speed of the struck electron is v. Through what angle w is the photon scattered
An old-style TV set places 20 kV across two plates of a parallel plate capacitor. What is the speed of the electron when it exits the hole in the plate
Air of room temperature was in a cylinder and sealed (cylinder is closed). Then, compression of 800kJ work was applied on the cylinder. Determine the amount of heat released from the cylinder to outside
A racing car start from rest in the distance and accelerates with a uniform rate of speed 35m/s in 11 sec moving in a circular path of radius 500 m assuming constant tangential acceleration find (1) the tangential acceleration. (2) The centripetal..
Astronomers have recently discovered a new planet in a faraway solar system, with a radius of roughly 380 km. calculate the minimum density of the planet
a researcher measures the concentration of advil in a patients bloodstream as a function of time making measurements
A strong wind current of 9.1 m/s is carrying gas a distance of 27351 m. What is the power rating on the convection
On a swing, a 37 kg girl undergoes small-amplitude oscillations with period 4.1 s. How long are the ropes that support the swing
What diameter needle should be utilized to inject a volume of 500cm^3 of a solution into a patient in 30 min? Suppose the length of the needle is 2.5cm and the solution is elevated 1.0m above the point of injection. Also suppose the density and visco..
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