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A vector has an x component of -21.5 units and a y component of 41.5 units. Find the magnitude and direction of the vector.
Calculate the magnitude of the net force on each due to the other two. Calculate the direction of the net force on each due to the other two.
An arrow, starting from rest, leaves the bow with a speed of 24.0 m/s. If the average force exerted on the arrow by the bow were doubled, all else remaining the same, with what speed would the arrow
Mars has a mass of 6.42 x 1023 kg and a radius of 3.40 x 106 m. (a) What is the acceleration due to gravity on Mars?
A space traveler weighs 550 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
A nearsighted person cannot see objects clearly beyond 25 cm (her far point). If she has no astigmatism and contact lenses are prescribed for her, what a) power and b) type of lens are required to c
A boat has a mass of 6800 kg. Its engines generate a drive force of 4400 N, due west, while the wind exerts a force of 720 N, due east, and the water exerts a resistive force of 1200 N due east. Wha
An airplane has a mass of 33,500 kg and takes off under the influence of a constant net force of 37,500 N. What is the net force that acts on the plane's 80 kg pilot?
You are conducting an experiment inside an elevator that can move in a vertical shaft. A load is hung vertically from the ceiling on a string, and is stationary with respect to you.
Consider a spherical conducting shell where the conductor has a net charge Q on it with no charges in the cavity. Does the voltage vary within the cavity from place to place? Explain why or why not?
A sinusoidal wave is traveling on a string with a speed of 40 cm/s. The displacement of the particles of the string at x = 10 cm is found to vary with time according to the equationWhat is the frequ
(a) The total amount of charge entering a wire at time t is Q = (20 C) (1-exp(-t / 2sec)), where 0<t<10 is in seconds. Graph Q(t), find an expression for the current I(t), graph I(t) and find
A square plate of copper with .5m sides has no net charge and is placed in a region of uniform electric field of 80.0 kN/C directed perpendicularly to the plate. Find (a) the charge density of each
A projectile is launched from ground level with an initial speed of 54.2 m/s. Find the launch angle (the angle the initial velocity vector is above the horizontal) such that the maximum height of th
A cannon barrel is elevated at an angle of 45°. It fires a ball with a speed of 326 m/s. (For the following questions, ignore air resistance.) (a) What height does the ball reach?
Graph the velocity of both travelers as a function of time up to t=16 seconds starting at time t=0 when desi leaves the classroom. Use a solid line for desi;s velocity and a dashed line for carmelas
The entire trip takes a total elapsed time of 27 s. Given this information, what is the speed of the moving walkway relative to the airport terminal?
Macrophages are cells referred to as "big eaters" or "killing machines" that destroy any foreign agents (pathogens) or antibodies found in the body.
What is the apparent depth of the reflection of the fish in the bottom of the tank when viewed at normal incidence?
Three charges are fixed in the x-y plane as follows: 1.7nC at the origin (0,0); 2.2nC at (0.65m, 0); -1.8nC at (0,1.60m). Find the magnitude of the force acting on the charge at the origin.
The coefficient of kinetic friction between your tires and the road is Δk=0.35 while for his car it is Δk =0.25. A) What is the acceleration of each vehicle?
Two ping-pong balls each have a mass of 2.7g and carry a net charge of 0.430μC. One ball is held fixed. At what height should the second ball be placed directly above the fixed ball if it is to r
How far downstream is the swimmer carried in 1.5 min. and what is his velocity relative to an observer on shore?
When the key is in the "up" position, the plate separation is 0.74mm. How far must the key be depressed for a keystroke to be registered which happens when the capacitance increases by 3.9 pF?
A stone is trown vertically downward at an initial speed of 14m/s from a height of 65m above the ground.How far does the stone travel in 2.0s and what is the velocity just before it hits the ground?