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1) An object of mass 2.5 kg experiences a force of 12 N towards the east and 5 N towards the north. The magnitude of the acceleration is _____ m/s2.
2) A wooden block slides directly down an inclined plane, at a constant velocity of 12.0 m/s. What is the coefficient of friction, if the plane makes an angle of 35 degrees with the horizontal?
3) A boy pulls with a force of 20 N on the 300 N wagon. What acceleration does the wagon have?
4) If the distance between two stars increases by a factor of 10, then the gravitational force between them changes by a factor of...
Over a certain region of space, the electric potential is given by: V = 3x^2 - 2xy + xyz, Find the expressions for the x, y, and z components of the electric field over this region
Sirius has a luminosity of 8.4 * 10^27 Watts and a mass of 2.1 times the mass of the Sun, How much hydrogen does Sirius convert into helium each second
You have a beach ball which has a radius of 11 cm and a mass of 0.3 kg. You have a lead ball which has the same radius but has a mass of 120 kg. What is the buoyancy force felt by the beach ball
Two steel guitar strings have the same length. String A has a diameter of 0.59 mm and is under 450.0 N of tension. String B has a diameter of 1.2 mm and is under a tension of 800.0 N. Find the ratio of the wave speeds, va/vb, in these two strings.
0.45 kg of a metal at 90degreesC is added to 0.40 kg of whater at 20.0degreesC. If the final temp of the mixture is 26.0degreesC, what is the specific heat of the metal
Suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.46 m radius and is 2 m high. How much energy is lost through the walls of the hot water heater
A woman walks 300m in the direction 30° east of north, then 300 m directly east.
Prepare a multiple-step income statement for the year ended December 31, 2012, concluding with earnings per share.
a mass m is attached to a string of length l and released when the string is horizontal, causing the mass to fall in a circular path. determine the maximum value of the tension force in the string
A bullet is fired into a block of wood sitting on a block if ice. The bullet has an initail velocity of 500m/s and a mass of 0.005 kg. The wooden block has a mass of 2kg and is initially at rest.
A runaway truck with failed brakes is moving with a speed of 130 km/h just before the driver steers up an emergency escape ramp inclined at 15 degrees above the horizontal
If someone is running in a 100m race and you want to work out the distance the sprinter has run what part of the sprinters body do you measure from the foot head or arm
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