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a car traveling due east at 20 m/s reverses its direction over a period of 10 seconds so that it is traveling due west at 20 m/s. What is the direction of the car's average acceleration over this period?
A gry is an old English measure for length, defined as 1/10 of a line, where line is another old English measure for length, defined as 1/12 inch. A common measure for length in publishing business is a point, defined as 1/72 inch. What is an area..
Differentiate between the following three types of plain carbon steels.
A particle with a charge of q = -5.00 nC is moving in the uniform magnetic field of vec{B}=( -1.20 T ) hat{z}. The magnetic force on the particle is measured to be vec{F}= ( -7.60×10-7 N )hat{y}.
imagine the water is in freefall as it drops. What charge must be on each plate.
The angular momentum of the electron as it moves around the center of the circle is 1.40 × 10-25J•s.Find the radius of the circular path.
NASA sends a satellite to another planet by placing the satellite in a Keplerian orbit (around the sun) such that the perihelion is at the radius of the Earth's orbit (1 AU) and the aphelion is at the radius of the planet's orbit. Most of the trip is..
A ball is thrown upward from the ground with an initial speed of 23.90 m/s; at = same instant, a ball is dropped from a building 16 m high. After how long will the balls be at the same height.
A particular guitar string is supposed to vibrate at 200Hz, but it is measured to actually vibrate at 209Hz. By what percent should the tension in the string be changed to get frequency to the correct value.
Water is pumped into a storage tank from a well delivering 17 gallons of water in 33 seconds throughout a pipe of 1.0 in 0.2 cross-sectional area. What is the average velocity of the water in the pipe as the water is pumped from the well?
A small remote-control car with a mass of 1.60 kg moves at a constant speed of v = 14.0 m/s in a vertical circle inside the hollow metal cylinder that has the radius of 5.00 m.
An uncharged capacitor is connected to the terminals of a 4 battery, and 12 flows to the positive plate. The 4 battery is then disconnected and replaced with a 7 battery, with the positive and negative terminals connected in the same manner as bef..
Both teenagers pull with a force of 55 at an angle of 35 relative to the forward direction, that is the direction of motion. In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magn..
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