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Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. The tree is 24 m tall and 85 m away. What is the size of the image of the tree on your retina? (Be careful about the sign of the image size.) Show your work.
a student is moving a safe onto a platform. the student needs to push the safe 2.3 m horizontally and then lift it 1.2
A 6.0 cm diameter pipe gradually narrowsto 4.0 cm. When water flows through this pipe at a certain rate, What is the volume rate of flow
A disk of mass M and radius R is initially at rest. It is acted upon by a constant torque N for a time t. what was the minumum power rating of the motor
You place a long straight wire on top of your compass, and the wire is a height of 3 millimeters above the compass needle. calculate the approximate angle the needle deflects
a popular method of distributing music used to be on disks that had a radius of about 0.3m and spun at a constant angular velocity of about pi radians per second. Find the tangential velocity at the inner and outer edges
Two slits are separated by .1 mm. Planar light incident on them produces a diffraction pattern on a board 1.35 m away, estimate the wavelength of light
Calculate the probability of finding the electron in the ground state of hydrogen at less than one Bohr radius from the nucleus
Slamming on the brakes, a driver decelerates her car from 25.0 m/s to 15 m/s in 3.5 s. Find her average speed assuming the acceleration was unifrom.
A sort of "projectile launcher" is shown in Fig. 20-65. A large current moves in a closed loop composed of fixed rails, a power supply, and a very light, almost frictionless bar touching the rails. A magnetic field is perpendicular to the plane of th..
A police car is moving towards you at a speed of 36.0 m/s. Its siren produces a frequency of 850 Hz. What frequency do you hear after it passes by you
A 40.0 ball of clay travelling east at 6.00 collides and sticks together with a 20.0 ball of clay travelling north at 5.00. What is the speed of the resulting ball of clay.
A spherical conducting shell of radius 25.0cm has a charge of -14uC on its outer surface and a charged particle in its hollow. What is the charge of the particle in the hollow
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