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Point charges of +1nc, +3nc and -3nc are located at each of three corners of an equilateral triangle with side length of 30cm. Find the net electrostatic fornce exerted on the the +1nc charge. Assume medium is a vacuum. Book answer is Fnet= 3 x 10^-7 N.
An unfortunate subject receives doses of the following types of radiation: ? rays (20 mrad, RBE=1), electrons (45 mrad, RBE=1), What is the total biologically equivalent dose received
The velocity of a ball changes from ‹ 9, ?7, 0 › m/s to ‹ 8.96, ?7.14, 0 › m/s in 0.02 s, What is the rate of change of momentum of the ball
an auditorium measures 40.0m X20.0 m X 12.0 m. The density of air is 1.20 kg/m^3. find the weight of air in the room
The coil of a generator has a radius of 0.16 m. When this coil is unwound, the wire from which it is made has a length of 9.50 m. What is the peak emf of this generator
The dry weight of a man is 845 N. When he is submerged underwater, the reading on the scale is only 43.2 N. What is the density of the man
A useful model of a water molecule is sketched in the figure below, with point charges of 5.2 10-20 C at the H sites, What is the total electric potential energy of this model of a water molecule
A 5g lead bullet travelling at 370-m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet whilst the other half is transmitted to the tree, what is the increase in t..
The pressure inside a gas bottle at 23.4 °C is 4350 kPa. What will be the pressure inside the bottle
An ideal gas has its pressure cut in half slowly, while being kept in a container with rigid walls. How much work was done during this process
A solenoid is 15 cm long and has 9000 turns. The current through the solenoid is 6A. What is the value of the magnetic field created
Consider a 1.0 g sample of carbon with 14C / 12C of 1.3 x 10-12. What is the activity of the sample
A small sphere with a mass of 1.0 g is suspended at the end of an insulating string of length 50 cm within a uniform horizontal electric eld of 12,000 N/C. What is the value of the charge on the small sphere
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