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What is the angle the total electric force on the charge at x = +16 cm, y = 0 cm makes when measured from the positive x direction, counter-clockwise? Answer in degrees.
In 2010, the men's record for the 26.22 miles Boston Marathon was 2 hours 5 minutes and 52 seconds. What was the average speed of the runner in units of m/s?
Suppose a free electron is located 0.551 nm above the midpoint of the sodium chloride molecule. What is the magnitude of the electrostatic force the molecule exerts on it?
There are four charges, each with a magnitude of 1.88 µC. Two are positive and two are negative. The charges are fixed to the corners of a 0.44-m square, one to a corner, in such a way that t
Calculate the fast neutron flux needed to produce the same injury as 0.50 mSv/hr of thermal neutrons, and then, as 6,000 thermal neutrons per sq. cm per sec. Please show your work.
Two particles with electric charges Q and 3Q are separated by a distance of 2.4 m. (a) If Q = 3.7 C, what is the electric force between the two particles?
An aluminum-alloy rod has a length of 10.008 cm at 16.400°C and a length of 10.020 cm at the boiling point of water. (a) What is the length of the rod at the freezing point of water? (Answer to th
A survey meter has been accurately calibrated in mR/hr. The measured value is then used directly by a technologist in Texas to determine the length of time a radiation worker can remain near a larg
Calculate the absorbed dose in Gy to the skin of a person which receives 1500 ergs/gm of beta radiation from a cloud of radioactive krypton-85 gas. Recalculate the dose if the same energy were depo
To measure the height of a tree, you throw a rock directly upward, with a speed just fast enough that the rock brushes against the uppermost leaves and then falls back to the ground. If the rock is
Given three measured elongation strains, e1 = 0.000410 i, e2 = -0.000290(-0.5i+0.866j), and e3 = 0.000610 (0.5i + 0.866j). find the state of strain at this location, find the principle strains, fin
If both the pressure and volume of a given sample of an ideal gas are doubled, what happens to the temperature of the gas in Kelvins?
Question: A 5.0- strand of DNA carries charge per of length. Treating it as a charged line, what's the electric field strength 21 from the DNA, not near either end?
A copper block is removed from a 310 degrees Celsius oven and dropped into 1.20kg of water at 20.5 degrees Celsius. The water quickly reaches 25.5 degrees Celsius and then remains at that temperatu
A particle undergoes two displacements. The first has a magnitude of 128 cm and makes an angle of 113 degrees with the positive x axis.
The concept of thermionic emission is the basis of modern X-ray tubes, which are the workhorse of a medical X-ray image. In this process a filament (a piece of metal in a vacuum) is heated by the ap
What is the y-component of vector D? What is the x-component of vector V? What is the y-component of vector V?
What is the speed of the ball when it leaves Sarah's hand? How high above the ground will the ball be when it gets to Julie?
Electrical power generation is one of the largest sources of human-caused greenhouse gas emissions. These emissions are not associated with solar cell power sources.
Two charges are placed on the x axis. One charge (q1 = +12.5 µC) is at x1 = +3.0 cm and the other (q2 = -15 µC) is at x2 = +9.0 cm. Find the net electric field (magnitude and direction)
What would be the total area of solar cells necessary to meet these power demands, including nighttime consumption and system inefficiency?
When a 7.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 25 cm from the mirror, its image is 3.8 cm tall. (a) What is the mirror's focal length (includ
The Toyota moves at a speed c=3 with respect to a xed radar gun. In the Toyota's rest frame, both cars have the same length. What is the speed v of the Bentley with respect to the radar gun? show y