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In exercise physiology studies, it is sometimes important to decide the location of a person's center of gravity. This can be done with the arrangement shown in the figure below. A light plank rests on two scales that read Fg1 =400 N andFg2 = 300 N. The scales are separated by a distance of2.00 m. How far from the woman's feet is her center of gravity?
A simple pendulum consists of a bob of mass 1.8kg attached to a string of length of 2.5m. The pendulum is held at an angle of 30 degrees from the vertical by the light horizontal string attached to a wall.
What is the average of the velocity squared in pure oxygen (O2) at standard pressure (1 bar) and concentration 0.001 mol/L? Give answer in (m/sec)^2
They want to dock, which means they have to arrive at the same position at the same time with zero velocity. (a) What should the initial velocity of the second spacecraft be? (b) Illustrate what should be its constant acceleration?
The acceleration due to gravity is 9.8 m/s^2 at Las Vegas, Nevada. What is the mass of the patatoes on the moon
A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible alternativ..
a current of 24.0 ma is maintained in a single circular loop with a circumference of 2.70 m. a magnetic field of 0.520
a particle with positive charge q = 6.40 x 10-19 C moving with speed v = 8.13 x 105 m/s toward a long straight wire with current i = 229 mA, What is the magnitude of the force on the particle due to the current
An iceboat of mass 100 kg is at rest on a frictionless frozenlake when a sudden wind exerts a force Fwind ofmagnitude 200N, What is the velocity of the iceboat
consider a spherical conducting shell where the conductor has a net charge q on it with no charges in the cavity. does
A rigid (constant volume) container holds 4.6 moles of an ideal gas initially at 190 K and 2.0 atm. How much gas is in the container at the final pressure and temperature
If energy were conserved in each collision, what would you expect the ratio of the total kinetic after the collision to the total kinetic energy before the collision to be? Are there anyof your collisions where energy is not conserved? Is this exp..
An electron and a proton are initially very far apart (effectively an infinite distance apart). which is the change in the electric potential energy
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