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Vector A, which is directed along an x axis, is to be added to vector, which has a magnitude of 7.0 m. The sum is a third vector that is directed along the y axis, with a magnitude that is 3 times t
Determine the distance the swimmer traveled, the total displacement of the swimmer, the swimmer's average velocity, and the swimmer's average speed.
The m =1 diffraction of the first member of the Paschen series is located 60.7 cm from the central maximum. What is the position of the second member of the Paschen series?
Determine the total stored energy before they are connected, after they are connected, and what is the change in energy?
A 71 tall graduated cylinder is filled with 21 of glycerin (density 1260 ) and 50 of water. Find the pressure difference between the top and bottom cylinder.
If a coal burning electrical generating plant burns 2 tons of coal to generate 6000 kWh of electricity, calculate the efficiency of the plant as the ratio of electricity output to fuel energy input.
A projectile is fired with a velocity of 980 m/s at an angle of 30 degrees above the horizontal from the top of a hill that is 40.0 m above the flat land below. The projectile just barely passes ove
What percentage of the maximum possible efficiency does this plant obtain? (Assume the temperature of the environment is 20 degrees celcius)
Energy could be taken as heat from the atmosphere(assume 30degrees celcius) and rejected as heat as heat to the Hudson River (10degrees celcius). What is the maximum efficiency of such an engine for
A projectile is launch from the ground level at an angle of 12.0 degrees above the horizontal. It returns to ground level. To what value should the launch angle be adjusted, without changing the lau
You are keeping pace with another runner, at 6 minutes per mile, but are 10 m behind her when she is 100m from the finish line. What constant acceleration do you need to catch her at the finish if s
An object lifted 10 meters gains 200 J of potential energy. If the same object is lifted 20 meters, its potential energy gain is:
Two parallel plate capacitors have circular plates. The magnitude of the charge on these plates is the same. However, the electric field between the plates of the first capacitor is 2.36 x 105 N/C,
Calculate how long our sun will be a red giant assuming that this luminosity is caused only by the fusing of hydrogen, that only 40% of the Sun's original supply of Hydrogen is fused during the red
A skateboarder, starting from rest, rolls down a 13.0 m ramp. When she arrives at the bottom of the ramp her speed is 6.00 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.
A room measures 1.0 m by 3.8 m by 5.9 m. The heating and air-conditioning ducts to and from the room are circular with diameter 0.30 m and all the air in the room is to be exchanged every 15 min. (
Your friend's 13.5 g graduation tassel hangs on a string from his rearview mirror. When he accelerates from a stoplight, the tassel deflects backward toward the rear of the car at an angle of 5.90
A sailboat is sailing due east at 5.00 mph. The wind appears to blow from the southwest at 14.2 mph a. what is the true wind speed
A major leaguer hits a baseball so that it leaves the bat at a speed of 30.5 m/s and an angle of 35.4 above the horizontal. You can ignore air resistance.1) What is the magnitude of the baseball's v
A chair of weight 140 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F= 44.0 N directed at an angle of 39.0 degrees below the horizontal and th
If the proton proton chain is the only nuclear reaction that happens in a star, what is the total number of Hydrogen nuclei in the core of this star? How much energy is available in each Hydrogen nu
You are swinging your younger sister in a horizontal circle of radius 0.65 m. Her mass is 21 kg and you arrange it so she makes one revolution every 1.5 s. (a) What is the magnitude and direction o
For a certain transverse wave, the distance between two successive crests is 1.20 m and eight crests pass a given point along the direction of travel every 13.50 s. Calculate the wave speed.
An electron, initially traveling in the +x-direction with a speed of 4 x 105 m/s, enters a uniform electric field directed vertically upward. After traveling in this field for 3.5 x 10-7 s, the electr
Two ping-pong balls each have a mass of 2.7 g and carry a net charge of 0.430 µC. One ball is held fixed. At what height should the second ball be placed directly above the fixed ball if it is