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In the javelin throw at a track-and-field event, the javelin is launched at a speed of 30.0 m/s at an angle of 39.2 ° above the horizontal. As the javelin travels upward, its velocity points abo
The peak instantaneous current in a certain lightning stroke is 21,700 A vertically upward. The current is approximately constant at this value for 1.2 x 10-4 s. (a) Find the charge transferred to t
A major-league pitcher can throw a ball in excess of 40.7 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the poi
A lead wire of cross-sectional area 0.980 mm2 is at a temperature of 2.00 K and carries a current of 0.490 A. (a) Find the voltage drop along a 10.4 m length of the wire.
The horizontal distance between the two buildings is D, and the roof of the adjacent building is 2.0 m below the jumping-off point. Find the maximum value for D.
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 670 m/s. The gun is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.024 m below t
A spacecraft is traveling with a velocity of v0x = 6570 m/s along the +x direction. Two engines are turned on for a time of 716 s. One engine gives the spacecraft an acceleration in the +x direction
Two particles are fixed to an x axis: particle 1 of charge q1 = 2.43 x 10-8 C at x = 22.4 cm and particle 2 of charge q2 = -6.00q1 at x = 55.4 cm. At what coordinate on the x axis is the electric fi
A 255 g mass attached to a horizontal spring oscillates at a frequency of 3.70 Hz . At t=0 s , the mass is at x= 4.80 cm and has vx=- 33.0 cm/s . Determine the phase constant and amplitude.
A brass cylindrical bar at 300 K has a diameter of exactly 20 mm. An aluminum ring has an inner diameter which is exactly 15 too small to fit over the brass cylinder. To what temperature do you need
Use either trigonometry or components to find the displacement that will return Bob to his starting pont by the most direct route. Give your answer as a distance.
What is Ex, the x-component of the electric field at point P which is located at the midpoint of the length of the cylinders at a distance r = 4 cm from the origin and makes an angle of 30o with the
The electric field just above the surface of the earth has been measured to be 163 N/C downward. What total charge (sign and magnitude) on the earth is implied by this measurement?
A small ball is launched at an angle of 30.0 degrees above the horizontal. It reaches a maximum height of 2.5 m with respect to the launch position. Find (a) the initial velocity of the ball when it
An infinite line charge of uniform linear charge density = -1.1 C/m lies parallel to the y axis at x = -1 m. A point charge of 2.1 C is located at x = 2.0 m, y = 3.0 m. Find the x- and y-components
Two neutral metal spheres on wood stands are touching. A negatively charged rod is held directly above the top of the left sphere, not quite touching it. While the rod is there, the right sphere is
On a cool morning, when the temperature is 10 degrees Celsius, you measure the pressure in your cars tires to be 30 psi. The drive to work heats your tires, and the air inside them, to 35 degrees Ce
The nucleus of a atom (an isotope of the element xenon with mass 125 ) is 6.0 in diameter. It has 54 protons and charge .What is the electric force on a proton 2.2 from the surface of the nucleus?
A compressed air cylinder is known to fail if the pressure exceeds 110 atm. It was filled to 25 atm at 20 degrees celcius and stored in a warehouse. Unfortunately, the warehouse catches fire and the
(A) what is the pressure of the container? give your answer in atm. (B) The gas then undergoes an isothermal compression until the pressure is 3.0 atm. Immediately following, there is an isobaric co
You can calculate your reaction time from the distance the meter stick falls, read directly from the point where your fingers grabbed it. If the measured distance is 16.2 , what is the reaction time
A 1.40 block is attached to a spring with spring constant 18.0 . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 34.0 . What is the
A 145 mass attached to a horizontal spring oscillates at a frequency of 4.00 . At , the mass is at = 4.40 and has 20.0 . The period is .25 seconds and the angular frequency is 25.133 rad/seconds. D
A subway train starts from rest at a station and accelerates at a rate of for 14.0 . It runs at constant speed for 70.0 and slows down at a rate of until it stops at the next station. Find the total