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Jack and Jill are standing on a crate at rest on the frictionless, horizontal surface of a frozen pond. Jack has a mass of 74.5kg , Jill has a mass of 45.5kg , and the crate has a mass of 15.3kg . They remember that they must fetch a pail of water, so each jumps horizontally from the top of the crate. Just after each jumps, that person is moving away from the crate with a speed of 4.40m/s relative to the crate
What is the final speed of the crate if both Jack and Jill jump simultaneously and in the same direction? (Hint: Use an inertial coordinate system attached to the ground.
What is the final speed of the crate if Jack jumps first and then a few seconds later Jill jumps in the same direction?
What is the final speed of the crate if Jill jumps first and then Jack, again in the same direction?
If a third charge, of 5, is now placed at the point = 3.00, = 4.00 find the components of the total force exerted on this charge by other two charges.
A solenoid is 1.6 m long and has 530 turns per meter. what is the cross sectional area of this solenoid if it stores .31 J of energy when it carries I=14A
Two identical conducting spheres each having a radius of 0.500 cm are connected by a light 1.60 m long conducting wire. estimate the tension in the wire.
Calculate the index of refraction for a piece of glass that is 3.5 cm thick if the ray inside the glassmakes an angle of 25.4 degree with respect to the normal
A 1.85m diameter wagon wheel makes one revolution in 3.45s. What is the tangential speed of a point in it's rim
A magnetic field is passing through a loop of wire whose area is 0.018 m2. What is the average emf induced in the loop
The company adheres to a 60% dividend payout ratio and has a P/E ratio of 19. There are 21,000 shares of stock outstanding. Illustrate what is the amount of the annual net income for the firm?
The three displacement vectors in the drawing have magnitudes of A = 5.47 m, B = 5.43 m, and C = 3.91 m. Find the resultant ((a) magnitude and (b) directional angle) of the three vectors by means of the component method. Express the directional an..
A person who weighs 653 N is riding a 100-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires
The membrane that surrounds a certain type of living cell has a surface area of 5.00 10-9 m2 and a thickness of 1 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.
what is the equivalent resistance between points A and B?
A uniform block of height 0.330 m, floats in glycerin of density 1260 kg/m3. The bottom of the block is 0.2748 m below the surface of the glycerin. Illustrate what is the density of the block?
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