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A person pushes with a force of 10N on a stick pin to try to push it into a bulletin board. if the tip of the needle is a circle with a radius of .12mm, then what is the average pressure (in pascals
An electron is placed in a uniform electric field of strength 156 N/C. If the electron is at rest at the origin of a coordinate system at t = 0 and the electric field is in the positive x-direction,
Two strings with linear densities of pullyes and attached to hanging blocks. Both strings have same frequency what is it? First pully has a length of 50cm and a blok mass of 20kg.
What about their individual( partial) pressure? Consider a head on collision between two such atoms that is one neon and another helium , and evaluate the velocities of atoms after the collision. Wh
Air enter a horizontal cylinderical pipe with creoss sectional area of 0.04m^2 operating at steady state at 280 k, 1 bar at flow rate of 0.3m^3/s, and exits at 325k, 0.95 bar. Assuming the the ideal
A 400 kg mass is released at rest from a distance of two Earth radii above the surface of the Earth. Find the speed of the mass when it has fallen to a distance of one radius above the surface of th
An electron (q = -1.602 x 10-19 C) is projected horizontally into the space between two oppositely charged metal plates. The electric field between the plates is 572.0 N/C, directed up. (a) While i
An electron is placed in a uniform electric field of strength 195 N/C. If the electron is at rest at the origin of a coordinate system at t = 0 and the electric field is in the positive x-direction,
A person whose near-point distance is 5 cm wears a pair of glasses that are 2.2 cm from her eyes. With the aid of these glasses, she can now focus on objects 23 cm away from her eyes. A) Find the fo
A pair of eyeglasses is designed to allow a person with a far-point distance of 2.02m to read a road sign at a distance of 20.2m . A) Find the focal length required of these glasses if they are to b
A myopic student is shaving without his glasses. If his eyes have afar point of 1.5m what is the greatest distance he can stand from the mirror and still see his image clearly?
You pull your t-shirt out of the washing machine and note that 1446 particles have become attached, each of which could be either an electron or a proton. Your t-shirt has a net charge of -2.62e-17
On Venus, the acceleration due to gravity is 8.87 m/s2. How far would a 29 g rock fall from rest in 2.5 seconds if the only force acting on it was the gravitational force due to Venus?
calculate (a) the speed at which the fox leaves the snow (m/s), and (b) how long the fox is in the air(s). Ignore air resistance.
If your friend plans to drive at 75.0 mph and you plan to drive at 55.0 mph, how long will your friend be driving before he meets you? (Ignore acceleration and assume the highway forms a straight li
For a magnetic system the work done by the system is u(sub not)HdM, and the Gibbs free energy is given by G = U - ST + u(subb not)*HM. Show that
It is the electromagnetic equivalent of a bow wave or a sonic boom. An electron is traveling through water at a speed 7.8% faster than the speed of light in water. (a) Determine the electron's total
A baseball player hits a line drive. Just before the ball is struck, it is moving east at a speed of 39.6 m/s (89 mi/h). Just after contact with the bat, 1.07 x 10-3 s later, the ball is moving wes
Calculate the amount of charge that will flow through Mitch's amplifier once the capacitor has fully dissipated. HINT: Combine equations first before plugging in.
What is the ratio of the minimum viewing distance to the vertical dimension of the TV screen such that you will not be able to resolve the lines? assume the average wavelength of light coming from t
A step-up transformer has 4 turns on the primary coil and 500 turns on the secondary coil. If this transformer is to produce an output of 4500 V with a 12 mA current, what input current and voltage
A neon sign that requires a voltage of 12000 V is plugged into a 120 V wall outlet. What ratio of turns (primary/secondary) must the transformer have to power the sign?
A toroidal selenoid has 500 turns, cross-sectional area 6.25cm and mean radius 4.00cm a) Calculate the coil's self inductance