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At what point along its length must the wire be cut so that the resistance of one piece is 4.0 times the resistance of the other? What is the resistance of each piece?
What is the smallest thickness of a soap film that would appear black if illuminated with 490 light? Assume there is air on both sides of the soap film.
The bullet becomes embedded in the block. The acceleration of gravity is 9.8 m/s2 . If the bullet-block system compresses the spring by a maximum of 89.2 cm, what was the speed of the bullet at impa
A 5.5µC and a 4.0µF capacitors are connected in series across a 24V battery. What voltage is required to charge a parallel combination of the two capacitors to the same total energy?
After equilibrium is reached, the mixture has an uniform temperature of 76.5165 C. What is the change in entropy of the system?
Find the net charge of a system consisting of 2.3×107 electrons.
What horizontal force must her wrist exert on her hand? Express the force in part (a) as a multiple of the weight of her hand.
A marble is thrown horizontally with a speed of 11 m/s from the top of a building. When it strikes the ground, the marble has a velocity that makes an angle 38° with the horizontal. From what he
A water skier is pulled by a net force of 198 N and has an acceleration of 2.2 m/s2. What is the mass of the skier?
A crane lifts a 2.80 103-N bucket containing 1.25 m3 of soil (density = 2.00 x 103 kg/m3) to a height of 6.95 m. Calculate the work the crane performs.
If the particle is sent back through the magnetic field (along the same initial path) but with 3.00 times its previous kinetic energy, how much time does it spend in the field during this trip?
If the string is 9.5 m long, has a mass of 25 g and is pulled taut with a tension of 8.0 N, how much time does it take for a wave to travel from one end of the string to the other?
A loaded truck can accelerate at 7.8 m/s2. It loses its load so that it is only 0.8 as massive. By what factor must the acceleration change for the same driving force?
A rope that exerts a 50-N force directed 30o above the horizontal. The coefficient of kinetic friction is 0.31. What is the acceleration of the block?
Remember to identity all of your data, write the equation, and show your work. While driving her new Camaro at 20.0 m/s down a four-lane highway, Jessica comes up behind a slow-moving dump truck and
What is the unknown magnitude of the field? B.If the thickness of the probe in the direction of B is 1.88 mm, calculate the charge-carrier density (each of charge e).?"
If the average gauge pressure in the artery is 1.02E+4 Pa, what must be the minimum height, h of the bag in order to infuse glucose into the artery? Assume that the specific gravity of the solution
A 1.6-m-diameter vat of liquid is 3.0 deep. The pressure at the bottom of the vat is 1.2 What is the mass of the liquid in the vat?
A rifle is aimed horizontally at a target 29 m away. The bullet hits the target 2.3 cm below the aiming point. Neglect air resistance. (a) What is the bullet's time of flight?
A slide projector needs to create a 95 cm high image of a 2.0 cm tall slide. The screen is 340 cm from the slide. Assume that it is a thin lens.
what is the minimum value for the hanging weight to the nearest tenth of a kilogram if L = 1.7 meters and the configuration is to remain stable"
A block of mass 12.0 kg slides from rest down a frictionless 34.0° incline and is stopped by a strong spring with k = 1.0 104 N/m. The block slides 3.00 m from the point of release to the point
A person pulls on a 50 kg desk with a 200N force acting at 30° angle above the horizontal. The desk does not budge. Draw a force diagram for the desk.
A car is moving down a street at 65 km/h. A child suddenly runs into the street. If it takes the driver 0.76 s to react and apply the brakes, how many meters will the car have moved before it begins
A 1000-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, f