A horizontal rod is placed at position B so that when the pendulum is released, the string catches at B, forcing the bob to swing in an arc which has a smaller radius. How will the height to which the
A 40 g block of ice is cooled to -72°C and is then added to 560 g of water in an 80 g copper calorimeter at a temperature of 23°C. Determine the final temperature of the system consisting of the ice,
I know the formula Ve=square root of 2G.M/r
if I know the circumference of earth (r) what is M and why is it 2G and not just G?
also, what is G anyway?-The potential energy of a mass m at the earths
A massless spring with spring constant 18.8 N/m hangs vertically. A body of mass 0.400 kg is attached to its free end and then released. Assume that the spring was unstretched before the body was rele
Human muscles have energy efficiency about 25%. That is, out of every calorie of food energy used up by the muscles, only 1/4 calorie is converted to mechanical energy while the remaining 3/4 calorie
Iron Oxide
University of California, Riverside nanotechnologists have succeeded in controlling the color of very small particles of iron oxide suspended in water simply by applying an external magne
Deep inside an abandoned iron mine in northern Minnesota, physicists may have spotted the clearest signal yet of dark matter, the mysterious stuff that is thought to make up 90 per cent of the mass of
Scientists explore atomic mysteries of ancient pigment
LOS ALAMOS, N.M., Nov. 18, 2004 -- University of California scientists from the National High Magnetic Field Laboratory, Pulsed Field Facility at
We know that lightning will strike in certain regions of earth regularly and we also know how to induce lightning in weather. So would it be possible to harness this power. For example set up high top
A 75 W high intensity lamp has a resistance of 12 ohms when burning. The
lamp’s power comes from the secondary of a small transformer, the primary of
which is connected to a 120 V circuit.
What is the
1. If a car is traveling at 45 m/s and its mass is 1,232 kg, find the kinetic energy of the car .
2. If a ball falls from the sears tower and hits the ground at 72 m/s what is its kinetic energy if t
a broken elevator is being pulled up an elevator shaft by a crane situated beside it, the elevator weighs 224.49 kg and is accelerating upwards at 0.25m/s^2 the rope from the crane makes an angle of 2
A mass m at the end of a spring oscillates with a frequency of 0.83 Hz. When an additional 680-g mass is added to m, the frequency is 0.60 Hz. What is the value of m?-Given f1=0.83Hz, f2=0.60Hz, Δm=m2
I am given a set of data to plot the elliptical orbit about the moon.
So far, I plotted the data onto a graph paper.
It asks me to draw the major axis and minor axis.
Major axis- It should go through
Two stationary positive point charges, charge 1 of magnitude 3.45nCand charge 2 of magnitude 1.95nC , are separated by a distance of 52.0 cm . An electron is released from rest at the point midway bet
