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Jack pulls a sled across a level field by exerting a force of 110 N at an angle of 30o with the ground. What are the parallel and perpendicular components, respectively, of this force with respect t
Determine the difference in the pulses' times of arrival at the detector. (Assume the index of refraction of ice is 1.309.) Answer in units of ns.
Arvin the Ant is on a picnic table. He travels 30 cm eastward, then 25 cm northward, and finally 15 cm westward. What is the magnitude of Arvin's net displacement?
A pirate ship fires a 25kg cannonball with a velocity of 100m/s at another very heavy trader ship. the ship is at rest. the cannonball bounces off with a velocity of -0.5m/s. a) How much energy was
An object moves at a constant velocity of 11 m/s to the southwest for an interval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity?
An object, initially moving in the negative x-direction, is subjected to a change in velocity in the positive y-direction. If the resulting velocity vector is drawn from the origin, into which quadr
A charged belt, of width d, travels at speed v between a source of charge and a sphere. The belt carries charge into the sphere at a rate corresponding to a current i. Compute the surface charge den
The cost of energy delivered to residences by electrical transmission varies from $0.070/kWh to $0.258/kWh throughout the United States; $0.110/kWh is the average value.
A convex mirror of radius of curvature 1.59 m is placed 0.336 m from a chess piece which is on the reflecting side of the mirror. What is the position of the image? Answer in units of m.
One of the floats in a Thanksgiving Day parade requires four people pulling on ropes to maintain a constant speed of 3.0 km/h for the float. The float is pulled in a straight line for 1.5 km.
A convex lens forms a real image 0.4 times the size of the object. The object distance is 17.1429 cm. Find the focal length of the lens.
Before setting up the laboratory model, your task is to calculate the constant velocity of the bar sliding down the ramp on rails in a vertical magnetic field as a function of the mass of the bar, t
A student adds two vectors with magnitudes of 200 and 40. Which one of the following is the only possible choice for the magnitude of the resultant? Please show your work.
A woman who can row a boat at 5.2 km/h in still water faces a long, straight river with a width of 5.2 km and a current of 3.5 km/h.
A dog running in the +y-direction at 6.2 hears its owner call from behind, and 2.3 later it's running at the same speed in the opposite direction.Compute the dog's change in velocity. Compute the do
A baseball player slides into second base with an initial speed of 7.80 m/s. If the coefficient of kinetic friction between the player and the ground is 0.45, how far does the player slide before co
How many photons per second are emitted by a monochromatic light bulb (wavelength= 650nm) that emites 55W of power?
At a distance r from a point charge, the electric potential is 4800 V and the magnitude of the electric field is 2.0×105 V/m. What is the electric potential at distance r/2 from the charge?
The mass of the rock is 0.400 kg. Initially the wagon is rolling forward at a speed of 0.600 m/s. Then the rock is thrown with a speed of 12.0 m/s. Both speeds are relative to the ground. What is t
A ski jumper leaves the ski track moving in the horizontal diresction with a speed of 25 m/s. the landing incline below her falls with a slope of 35 degree. where does she lands on the inlcine. in o
Find the displacement x(t); with numerical values (including units) for all constants in your expression.
A lightly-damped oscillator is set in motion and observed as the oscillations decrease in amplitude. Derive approximate values for the factors by which i) the amplitude, and ii) the energy will decr
Determine the mass the bathysphere must take on so that it can descend at a cinstant speed of 1.20 m/s when the resistive force o it is 1100 N upward. The density of the sea water is 1.03 x 10^3 kg/
The coefficients of static and kinetic friction between the wood and wall are 0.45 and 0.30, respectively. The wood slides down unless the applied force has magnitude 13 N. What is the mass of the b