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Two large, parallel, conducting plates are 9.1 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 4.2 x 10-15 N acts on an electron p
(Assume a smooth transition at the bottom of the incline.) If the collision is elastic, and friction can be ignored. Determine the speeds of the two blocks after the collision.
An airplane flies horizontally with speed 1000km/h(280m/s) an engine falls it takes 30s to gets to the ground. neglect air resistance show the airplane is 4.5km high?
A small, 100g cart is moving at 1.2 m/s on an air track when it collides with a larger, 1.00kg cart at rest. After the collision, the small cart recoils at .850 m/s. what is the speed of the large c
If this position is to remain correct to one-half the width of a finger (that is, to within 0.600 cm.), what is the maximum allowable percentage change in the string tension?
A simple harmonic oscillator consists of a block of mass 4.10 kg attached to a spring of spring constant 300 N/m. When t = 0.820 s, the position and velocity of the block are x = 0.188 m and v = 3.6
A small object with a mass of 380 mg carries a charge of 40.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 4.00 cm. If the
Suppose an electric field with a magnitude of 2.8 E 4 N/C at a certain location, points due south. If a charge of -4.0 E -6 C is brought to the location, what is the electrostatic force that acts on
How high does the top of the ice block float above the water level?
To measure the weight of the cat, a person places a 100N box and a 60N box from the ends of a uniform pole that is pivoted at its center. The system balances when the cat stands at a point 1/4 of t
Assuming that the helium behaves like an ideal gas, (a) what is the total translational kinetic energy of the molecules of the gas? (b) what is the average kinetic energy per molecule?
The 7.0 N frictional force is applied at a point 40 cm from the chair's rotation axis, in the direction that dauses the greatest angular acceleration. If that angular acceleration is 1.8 rad/s^2, wh
When a guitar string is sounded along with a 412-Hz tuning fork, a beat frequency of 43.0 Hz is heard. When the same string is sounded along with a 422-Hz tuning fork, the beat frequency is 33.0 Hz
An 9.00 point mass and a 12.5 point mass are held in place 50.0 apart. A particle of mass is released from a point between the two masses 19.0 from the 9.00 mass along the line connecting the two fi
A jeweler working with a heated 47 g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celcius, what mass of water at 25 degrees Celcuis i
1600kg car is traveling along a straight road at 20m/s. Two seconds later, it's speed is 21m/s. What is the magnitude of the net force acting on the car during this time?
The bright star Antares in the constellation Scorpius (the Scorpion) emits the greatest intensity of radiation at a wavelength of 853 nm. What is the surface temperature of Antares? What color is th
What would be the difference between the time t measured by an observer moving at 30 rm m/s and the proper time t_0 for a proper time interval of 1 hour (3600 rm s)?
A stunt man whose mass is 71.4 kg swings from the end of a 4.25 m long rope along the arc of a vertical circle. Assuming that he starts from rest when the rope is horizontal, find the tensions in th
Two strings are adjusted to vibrate at exactly 223 Hz. Then the tension in one string is increased slightly. Afterward, three beats per second are heard when the strings vibrate at the same time. Wh
The loaded cab of an elevator has a mass of 3.0 103 kg and moves 237 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?
If you were going to design a study investigating the relationship between alcohol and violence, which of these methods would you choose and why? What would be the relative strengths and weaknesses
A basketball rolls off of the roof of a house with a velocity of15 m/s. The roof makes an angle of 23 degrees with the horizontal. If the edge of the roof is 10 meters high, determine how far from t