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Q. A proton is released from rest in a uniform electric field of magnitude 1.20×10^5 N/C. Find the speed of the proton after it has traveled (a) 1.70 cm and (b) 11.0 cm.
Q. Three positive charges are located at the corners of an equilateral triangle. Find an expression for the electric potential at the center of the triangle. (Use the following as necessary: ke, Q, and d.)
lady ate a whole medium size pizza storing up 120 food Calories. This energy is used to heat up 2 liters of water from a certain initial temperature to a final temperature of 80 deg.C, what was the initial temperature of the water?
What is Newtons Version of Keplers Third Law
A pendulum has a period of 0.80s on Earth. What is its period on Mars, where an acceleration of gravity is about 0.37 that on Earth.
How much work is done if the same tension is directed parallel to the snow.
The pilot of the spaceship measures the length of the moving ship as 30 meters. Establish its length as measured by a person on earth.
A stone is dropped into a river from a bridge 43.90 m above the water. Another stone is thrown vertically down 1.00 after the first is dropped. The stones strike the water at the same time.
Two people with a combined mass of 120kg hop into an old car with worn-out shock absorbers. This causes the springs to compress by 8.30 cm. When the car hits a bump in the road, it oscillates up and down with a period of 1.70s.
asssume that in a particular vacuum tube the potential of the anode is 340 V higher than that of the cathode. If an electron leaves the surface of the cathode with zero initial speed, what is its speed when it strikes the anode.
Calculate the energy associated with the magnetic field of a 191 turn solenoid in which a current of 2.44. A produces a magnetic flux of 3.74 x 10-4 T • m2 in each turn.
Calculae the flow rate ( in grams per second) of blood in the aorta if the flow speed is 42 cm/s.
Carry out the following arithmetic operations: (a) sum of the measured values 756, 37.2, 0.83 and 2.5. The answer must be in significant digits. Since 2.5 and 0.83 have two significant digits, shouldn't the answer be 800 instead of 797.
Suppose the speed of light in a vacuum were only 25.5 mi/h. Find the length of the bicycle being ridden at a speed of 20.0 mi/h as measured by an observer sitting on the park bench, given that its proper length is 1.59 m.
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