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a proton has a speed 4.5*10^5 m/s at a point where electrical potential is 900V. it moves through a point where the electric potential is 500V. find the kenetic energy of proton at first point
Suppose that you wish to fabricate a uniform wire out of 1.00 g of copper. Assume the wire has a resistance R = 0.700 %u03A9, What will be the length of the wire
An aluminum wire having a cross-sectional area equal to 5.10 10-6 m2 carries a current of 3.50 A. Find the drift speed of the electrons in the wire
Calculate the limiting angle of resolution for the eye, assuming a pupil diameter of 1.95 mm, a wavelength of 530 nm in air
two strings with linear densities of g/m are stretched over pulleys, and attached to hanging blocks (string 1 is 20 kg=mass of block)-50 cm away. what is the unkown mass
When light with a wavelength of 228 nm is incident on a certain metal surface, Determine the wavelength of light that should be used to double the maximum kinetic energy of the electrons ejected from
the speed of light in a material is 0.41 c. what is the critical angle of a light ray at the interfacce between the material and a vacuum
Two cars of collide in a glancing collision and stick together. Before the colli- sion the first car (mass of 500 kg) is moving with velocity 25 m/s at an angle of 30%u25E6 North of East, Determine
Sirius is about 9.0 light-years from Earth. How far is the trip according to you, To reach the star by spaceship in 16 years (ship time), how fast must you travel
A sprinter crosses the finish line of a race. The roar of the crowd in front approaches her at a speed of 351 m/s. What is the sprinter's speed
In what ways is the transducer in medical ultrasound a 'speaker' & 'microphone?', What is the broadest definition of a 'transducer?'
The Lyman series results from transitions of the electron in hydrogen in which the electron ends at the n=1 energy level. calculate the wavelengths of the photons emitted in the transitions from the e
A small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
an electric on a airplane operates 20.8 volts a draws a current of 14.7amps. How much energy in joules does the motor use
a search light requires 56 watts of power when connected to 117 volts. What is the resistance of the searchlight
A projectile is fired with an initial speed of 69.0m/s at an angle of 42.8 degrees above the horizontal on a long flat firing range
an electric toaster operating on 104.6 volts draw a current of 9.1 amps. what is the resistance of the toaster
the light bulb used in a projector has a resistance of 28 ohms when operating on 104 volts. What is the bulbs power consumption
A pair of narrow slits, separated by 1.8 mm, is illuminated by a monochromatic light source. Light waves arrive at the two slits in phase. What is the wavelength of the monochromatic light
An elevator moves downward in a tall building at a constant speed of 3.80 m/s. Estimate the highest floor from which the bolt can fall
A 2.0-kg block slides along a rough horizontal surface. A force(P=6.0N) is applied to the block at a 30degree angle. find the magnitude of the force of friction acting on block
A Charge of Q=700nC is uniformly distributed throughout a circular disk of radius R =10 cm, What are the magnitued and direction of the electric and magnetic field at the center of the rotating charge
A 46.7 g ball of copper has a net charge of 1.5 µC. What fraction of the copper's electrons have been removed
A ball of mass m is tied to a vertical (Cyclinder) post of radius R. The mass slides on a frictionless, What is the angular momentum of the ball after the string has wrapped once around the post
A 2.0 kg ball is attached to a vertical post with two strings, one 2 m long and the other 1 m long. If the ball is set whirling in a horizantal circle, find the tension on each string