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This question deals with air track experiment and collisions of the track cars. Was it necessary to have equal length intervals in the experiment to investigate properly the conservation of momentum
500 g mass hangs at the end of a 40 cm long string. It is struck by a 250 g mass moving at 0.5 m/s to the right. Find the velocities of both masses immediately after the collision.
A cubic meter of copper has a mass of 8930kg. The block of copper is lowered into a lake by a strong cable until the block is completely submerged. What is the tension in the cable--using gravity=10
A 90.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 38.0 deg with the horizontal. Find the magnitude of the applied force F. What is the
A student finds the following values from a graph between M and x in the static method of determining the spring constant k:
A baseball played of mass 93.2 kg is sliding horizontally into 2nd base retarded by a force of 575.4 N. What is the coefficient of kinetic friction between the player and the ground?
A concave mirror produces a virtual image that is three times as tall as the object. What is the focal length of this mirror?
A box of sand (initially at rest) is pulled along a horizontal floor by a cable with a breaking strength of 1020.0 N. The coefficient of static friction between the box and the ground is 0.42. What
How does water pressure one meter below the surface of a small pond compare with water pressure one meter below the surface of a huge lake?
A man scientist decides to build a machine that will use a 0.5 Tesla magnetic field to make electrons (charge = 1.6 x 10^-19 C and m= 10^-30Kg) travel in circles of radius 2 cm. To do this he must
A 6.80 H inductor with negligible resistance is connected across an ac source whose voltage amplitude is kept constant at 31.2 V , but whose frequency can be varied. a) Find the current amplitude wh
A container is filled to a depth of 22.0 cm with water. On top of the water floats a 28.0-cm-thick layer of oil with specific gravity 0.500. What is the absolute pressure at the bottom of the contai
Consider a beam of light that passes through two small parallel slits and shines on a screen. Will the intensity of the light at the central bright spot on this screen be twice as bright as the inte
A solenoid is wound with a single layer of copper wire of radius 0.29 cm. The solenoid is 2.5 cm in diameter and 2.8 m long. What is the inductance of the solenoid per unit length?
The power of the pulse is 2.80 MW. If we assume that the atoms contributing to the pulse underwent stimulated emission only once during 0.500 x10-6s, how many atoms contributed?
A step-up transformer has 50 turns on the primary coil and 500 turns on the secondary coil. If this transformer is to produce an output of 5000 V with a 12-mA current, what input current and voltage
A 45 turn coil of radius 5.4 cm rotates in a uniform magnetic field having a magnitude of 0.55 T. If the coil carries a current of 30 mA, find the magnitude of the maximum torque exerted on the coil
Why is the small intestine called the "small" intestine when it is actually much larger than the large intestine for frogs? What is the texture of the inner lining of stomach of a frog?
An uniform electric field of magnitude E = 100 N/C is oriented along the positive y-axis. What is the magnitude of the flux of this field through a square of surface area A = 2 m2 oriented parallel
What average voltage is induced in the coil? Express the answer with two decimal places.
Find and mark the following: Vernal Equinox ( first day of spring), Autumnal Equinox(first day of autumn), Summer Solstice( first day of summer), Winter Solstice(first day of win
A person walks into a room that has, on opposite walls, two plane mirrors producing multiple images. Find the distances from the person to the first three images seen in the left-hand mirror, when t
What are the rms values of the (a) electric and (b) magnetic fields?
What must be the value of the inductance in order that this station can be tuned in by the radio?
When viewed in a spherical mirror, the image of a setting sun is a virtual image. The image lies 17 cm behind the mirror. (a) What is the focal length of the mirror? (b) What is the radius of curvat