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The three capacitors C=2.0 uF (micro Farad) in parallel are connected across a 30- battery. A. Find the charge on each capacitor. B. Find the potential difference across each.
If the coefficient of static friction between tires and pavement is 0.55, calculate the minimum torque that must be applied to the 70 cm-diameter tire of a 980 kg automobile in order to "lay rubber"
In a Little League baseball game, the 145 {\rm g} ball enters the strike zone with a speed of 15.0 {\rm m/s}. The batter hits the ball, and it leaves his bat with a speed of 20.0 {\rm m/s} in exactl
How do the temperature of combustion and the temperatures of collant and exhaust affect the efficiency of automobile engines?
Two speakers 10m apart and facing each other emit identical in phase sound waves. if you stand between the speakers 2m from one of them on a day when the temperature is 20 degrees Celsius and can he
At what horizontal distance from the top of the slope, from where she took off, will she land? This will be 50.0 m below where she took off. The thrust of the skis is parallel to the skis. There is
On a day when the temperature is 20 degrees C, a child steals your tuning fork of frequency 512 hz, begins ringing it, and runs away. You chase after the child running with a speed of 5m/s. if you h
A projectile is launched with an initial speed of 40 m/s at an angle of 20° above the horizontal. The projectile lands on a hillside 3 s later. Neglect air friction. (a) What is the projectile's
500J of work is done to compress the gas while, in the same process, 1400J of heat energy is transferred from the gas to the environment. Afterward what is the rms speed of the molecules?
At what distance from the wall should this mirror be placed so that a real image of the object is formed on the wall? What is the magnification of the image?
The mass of platinum is 21.4 x 103 kg/m3. A platinum wire with a radius of 0.500mm, 1.20 m long fixed at both ends has a frequency of vibration for its third harmonic equal to 512hz. What is the ten
The skater tosses a coin horizontally over her shoulder straight behind her. The coin leaves her hand at 5 m/s (relative to the hand). What is the speed of the coin as viewed by a person standing st
On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 3.7 times as far as he would have on earth, given the same initial velocities on both planets.
A rifle with a weight of 30 N fires a 5.0g bullet with a speed of 300m/s. If a 700 N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle.
With what speed must the quarterback throw the ball so that the pass lands gently in the receiver's hands without the receiver breaking stride?
A 4.58 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=11.40 N at an angle theta=30.0 degrees above the horizontal. What is the speed of the block 5.50
When the ball hits the wall, the horizontal component of its velocity is reversed; the vertical component remains unchanged. (Ignore any effects due to air resistance.)How long was the ball in the a
The entire trip takes a total elapsed time of 33 s. Given this information, what is the speed of the moving walkway relative to the airport terminal?
You are the navigator of a ship at sea. You receive radio signals from two transmitters A and B, which are 109.0 km apart, one due south of the other.
Protons in a cyclotron, just before they emerge, descries a circle of 0.40m. The frequency of the alternating potential between the dees is 107 Hz. Neglecting relativistic effects, compute (a) the m
Which rod and material produces the most dramatic effect on the pith balls? What type of charge transfer occurred between the rod and the pith balls?
A child of mass 32 kg sits on a wooden horse on a carousel. The wooden horse is 3.7 m from the center of the carousel, which rotates at a constant rate and completes one revolution every 7.2 second
A parallel plate capacitor of plate area 1*10-2 m2 is filled with two dielectric slabs, each with thickness 1.00 mm. One slab has dielectric constant of 4.7, and the other, 6.5. (a) What is the cap
A 2.60µF capacitor is charged by a 12.0-V battery. It is disconnected from the battery and then connected to an uncharged 4.50µF capacitor. Determine the total stored energy (Joules) bef
Consider a container of 2.0 grams of hydrogen. Suppose you remove all of the electrons and moved them to the other side of the earth. (12,740km) What is the attractive force between the protons here