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(a) An orange crate of mass M is at rest on an icy surface. One cord connects the crate to a wall. A second cord oases over a frictionless rod and suspends another crate of equal mass. What is the tension in each cord?
(b) If the cord between the orange crate and the wall is replaced by a spring with spring constant k and unstressed length l, obtain how far is the orange crate from the wall?
The distance to a star is approximately 7.60 1018 m. If this star were to burn out today, in how many years would we see it disappear? How long does it take for sunlight to reach Jupiter?
an artillery shell is fired with an initial velocity of 300 ms at 55.0deg above the horizontal. to clear an avalanche
two point charges attract each other with an electric force of magnitude f. if one charge is reduced to one-third its
An infinite non conducting sheet has a surface charge density σ = +5.80 pC/m2. (a) How much work is completed by electric field because of the sheet if a particle of charge q = +1.60 × 10-19 C is moved from the sheet to a point P at distance d = 3.56..
A metal wire 1.0mm in diameter and 2.5m long hangs vertically with a 4.8-kg object suspended from it. what is the value of Young's modulus for the metal
q1. determine the tension in each cable if the boat has a mass of 490 kg and the angle of each cable is 50 degrees from
The wire in a 150 W aquarium heater has a diameter of 0.12 mm and is made of iron, What resistance should the wire have while the heater is operating
Two parallel current carrying wires are separated by 12 cm and each are 50 cm in length. Determine the Force acting on each wire due to the other one
A wheel with radius 1.50 m is turning about a horizontal axis through its center (the plane of the wheel is vertical). The wheel starts from rest and undergoes constant angular acceleration in the counter clockwise direction. At the lowest point of i..
A loudspeaker is generating sound in a room. At a certain point, the sound waves coming directly from the speaker (without reflecting from the walls) create an intensity level of 74.1 dB. The waves reflected from the walls create, by themselves, an i..
What minimum force is necessary to start the block moving up the wall? (Hint: The static frictional force is now directed down the wall.)
How would you describe the discoveries of Benjamin franklin, Robert millikan, cgarles-augastin de coulomb and Ernest ruthford
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