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a 20kg door is spun for 27 s at an anglular speed of 1.2 rev/s by two seperate simultaneous forces. One pushes with force of 53 N, What is the work done by torque spinning the door
a 250 kg merry-go-round is a solid disc with a radius of 1m when a 40 kg child sits at the center the angular speed is 6 rev/s
A tall tree is growing across a river from you. You would like to know the distance between yourself and the tree,as well as its height, How far away is the tree
A dentist's mirror is placed 2.4 cm from a tooth. The enlarged image is located 5.9 cm behind the mirror. How is the image oriented relative to the object
A force with a magnitude of 25 N and directed at an angle of 37° above the horizontal is used to move a 10-kg crate along a horizontal surface at constant velocity
A person with a weight of 237 lb stands on two feet with their weight equally distributed between the two shoes, What is the pressure on each shoe independently
A carbon nanopaeticle contains 7000 carbon atoms. According to the Einstein model of a solid, how many oscillators are in this block
a ball mass of 5 grams and radius of 1.5 cm is rolled up a frictionless ramp that is 30 degrees above horizontal with an iniitial velocity of 4 m/s
Two identical capacitors are connected in parallel to an ac generator that has a frequency of 574 Hz and produces a voltage of 24 V. What is the capacitance of each capacitor
To Bounce a ping-pong ball into a cup at the other end of a table, what is the net force of the ball on the table
A stone is thrown directly upward from a height of 30 ft with an initial velocity of 60 ft/sec. Determine the time at which the stone reaches its maximum height
A cylindrical piece of metal 0.085 m tall with a diameter of 3.90 cm has sp.gr. = 2.0, what is the mass of the cylinder
An object is recovered from under the sea. Its weight is measured to be 32.5 lb and its volume 3.3 ft3. What is the object's weight density
A long solenoid has 1.56e+3 turns in length of 40.0 cm. What current has to flow through the solenoid in order to generate a magnetic field
A viewing window in the Atlanta aquarium is 51 inches wide and 54 inches high. what is the outward force on the window
A tungsten target is struck by electrons that have been accelerated from rest through a 20.0-kV potential difference
Sketch a sinusoidal wave with an amplitude of 1 cm and a wavelength of 7 cm. What is the amplitude of the sum of these waves
You are holding a compass 3.50m from a long straight electrical supply wire that is carrying a direct current perpendicularly to the local direction of the Earth's magnetic field. What is the magnit
The water in a tank is at a gauge pressure of 241,504 Pa. If the bottom of the tank that has an area of 0.2 m2
A plank 2.00 cm thick and 15.7 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. find the shear modulus of t
Light in a transparent material (index of refraction 1.333) strikes the boundary with another transparent material (n = 1.010). compute the critical angle for total internal reflection
The ideal gas law relates the temperature, pressure and volume of an ideal gas. How many molecules of gas are inside the balloon
For the known values of the Earth such that RE = 6.37×106m and ME = 5.97×1024kg, find the height that the satellite is orbiting above the surface
A farsighted man uses eyeglasses with a refractive power of 3.57 diopters. Wearing the glasses 0.026 m from his eyes, What is the correct contact lens prescription
Two converging lenses (f1 = 9.00 cm and f2 = 6.00 cm) are separated by 18.0 cm. The lens on the left has the longer focal length. Locate the final image relative to the lens on the right