Physics Force & Laws Of Motion Level: Misc Level
Two ice skaters stand at rest in the center of an ice rink. when they push off against one another the 45 kg skater acquires a speed of 0.72 m/s. If the speed of the other skater is 0.84 m/s, what is this skater,s mass?kg
Physics Force & Laws Of Motion Level: Misc Level
[Walker2 9.p.009.]In a typical golf swing, the club is in contact with the ball for about 0.0012 s.If the 45 g ball acquires a speed of 0.73 m/s,estimate the magnitude of the force exerted by the club on the ball.kN
Physics Waves And Oscillations Level: Misc Level
Two identical tuning forks are struck, then one is placed on a moving stage, constant speed away from the observer, and the other is left stationary. What would the observer hear?Explain.
Physics Electrostatics Level: Misc Level
What is the capacitance of a capacitor constructed from 2 rolls of aluminum foil cach with dimensions of 1.0 by 20 yd., seperated by wax paper of the same area. Assume the thickness of the paper to be .125 mm, and k=3.5
Physics Electrostatics Level: Misc Level
A particle having a charge q=3x10^-5 C moves from point a to b, a total linear distance of .5 meter.If the mass of the charge is 5x10^-5 kg and the electric field is uniform and in the direction of a to b E=200 N/C what is the increase in energy in eV?in Joules?How fast is the particle going at point b?
Physics Electrostatics Level: Misc Level
What is the capacitance of a capacitor constructed from 2 rolls of aluminum foil each with dimensions of 1.0 by 20 yd,,sperated by wax paper of the same area. Assume the thickness of the paper to be. 125 mm , and k=3.5
Physics Electrostatics Level: Misc Level
Find the ratio of Fe/Fg (f sub e and f sub g) of the electric force and the gravitaional force exerted by the proton on the electron.
Physics Electrostatics Level: Misc Level
A particle having a charge q=3x10^-5 C moves from point a to b,a total linear distance of .5 meter. If the mass of the charge is 5x10^-5 kg and the electric field is uniform and in the direction of a to b E= 200 N/C what is the increase in energy in e V?in Joules?How fast is the particle going at point b?
Physics Electrostatics Level: Misc Level
A spherical balloon with a 6 cm radius has charge distributed over its surface. at a distance of 50 cm from the center of the balloon the electric field strenth is 7.2 x 10^4 N/c.
a) what is the magnitude of the charge on the balloon
b)what is the electric field strength 3 cm from the center of the ballon
c) '' '' '' '' '' ''18 cm '' '' '' '' ''
d) what is the electric potential inside the balloon
e) what is the electric potential 18 cm from the center of the balloon?
Physics Electrostatics Level: Misc Level
A total charge of 100 micro C is distributed uniformly throughout a spherical region of space with a radius of 20.0 cm. Find the electric field strenght at a) r=10 cm from the center of the sphere b) r=30 cm from center of sphere c) what is the volume charge density?
Physics Electrostatics Level: Misc Level
A uniform electric field of 2 x10^5 N/C parallel to the positive z axis fills all of space. compute the electric flux through a rectangle of 4.8 m^2 if the rectangle is placed a) in the xyplane b) in the yz plane c) the plane makes an angle of 30 degrees with the y axix of the origin.
Physics Electrostatics Level: Misc Level
A rod 80 cm long is charged with a charge density of 40 miccro C/m. A charge of 20 micro C is placed 80 cm from the midpoint of the rod and along a line perpendicular to it Calculate the electric field a point midway between the point charge and the center of the rod.
Physics Work,Power & Energy Level: Misc Level
A 50 kg crate slides down a 5.0 m loading ramp that is inclined at an angle of 25% to the horizontal.A worker pushes on the crate parallel to the surface of the ramp so that the crate slides down with a constant velocity. If the coefficient of kinetic friction between the crate and the ramp is 0.33, how much work is done by each of the following?(a)the worker,(b)the force of friction, (c) the force of gravity, (d) what is the net work done on the crate?
Physics Work,Power & Energy Level: Misc Level
A constant horizontal force of 28 N moves a box with a constant speed along a rough surface. If the force does work at a rate of 50 w, answer the following.(a) what is the box,s speed? (b) How much work is done by the force in 2.7 s?
Physics Work,Power & Energy Level: Misc Level
A particular force is described by the equation F=(60 N/m) x x.How much work is done when this force pushes a box horizontally between the following points?(a)x0=0 and x=0.12 m, (b)x0=0.15 m and x=0.26 m
