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1. If vector U= 3i + 4j, vector V= 5 k and vector W= 4i - 3j, find the angle between U and V-W . 2. At the same time that ball X rolls off a platform on an airless extra-solar planet 8.00 meters high at a speed of 6.00 m/s, ball Y is dropped from the edge of the platform. Ball Y hits the ground after 1.00 second. Find g on this extra-solar planet. 3. The mass of ball X is 12.0 kilograms and the mass of ball Y is 9.0 kilograms. Find the momentum of ball X and the momentum of ball Y in problem 2 at the time when ball X hits the ground. 4. Find the gravitational forces of a) the planet on ball X, b) ball X on ball Y, c) ball Y on ball X and d) ball Y on the planet at the time when ball Y hits the ground.
You want to take a full-length photo of your friend who is 1.80{\rm m} tall, using a 35.0{\rm mm} camera having a 50.0{\rm mm} lens. How far is the lens from the film
Suppose you hook up some AC circuit with a combination of inductors, capacitors, and resistors, and you are measuring the voltage across one of these elements. You set up the oscilloscope so that it is set to .5 VOLTS/DIV, and 5 ms/DIV and observe th..
A point of charge of -4.00 nC is at the origin, and a second point of charge of +6.00 nC is on the x axis at x= 0.800 m. Discover the magnitude and direction of the electric field at the following points On the x axis: x= 20cm, x=1.2m, x=-20cm.
Two charges are brought together until they are 90.0cm apart, causing the electric force between them to increase by a factor of exactly 6. What was their initial separation distance
A steel wire 2.1 mm in diameterstretches by 0.036% when a mass is suspended from it. How large is the mass
a 18.0-kg cannonball is fired from a cannon with muzzle speed of850msat an angle of33.0degwith the horizontal. a second
Light in vacuum is incident on the surface of a slab of transparent material. In the vacuum the beam makes an angle of 27.2° by the normal to the surface, while in the slab it makes an angle of 17.2° with the normal. What is the index of refraction o..
A propeller is modeled as five identical uniform rods extending radially from its axis. what is its rotational kinetic energy
the overhead cable for a street trolley is strung horizontally 5 m above the ground. What is the magnetic field at street level directly under the cable
A lamp (R = 152 Ω), an electric heater(R = 26 Ω), and a fan (R =52 Ω) are connected in parallel across a 120 V line. Compute the current in the lamp. What is the voltage across the fan? Compute the total current supplied to the circuit.
If I know the net force acting on an object and the acceleration that the object has from the force. How do I find the weight of the object
Light traveling in air is incident on the surface of a block of plastic at an angle of 61.0degree to the normal and is bent so that it makes a 46.5 degree angle with the normal in the plastic. Find the speed of light in the plastic.
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