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A gas is enclosed in a container fitted with a piston of cross-sectional area 0.24 m2. The pressure of the gas is maintained at 8565 Pa as the piston moves inward 8 cm. If the internal energy of th
A 74.2 cm long straight section of wire is located entirely inside a uniform magnetic field of |B| = 0.230 T. The wire is perpendicular to the direction of the magnetic field. When a current runs th
The resistance of the tungsten wire is 3.000 W at 20°C and increases to 4.850 W as the indium starts to melt. atungsten = 4.50 ´ 10-3 (°C)-1. What is the melting temperature of indium?
A 250 kg weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 32 m/s2 for 34 s, then runs out of fuel. Ignore any air resistance effects. What is the rocket's
The coefficient of kinetic friction is 0.265. What is the tension in the string and what is the acceleration of the system. The box off the table weighs 10.0 kg.
A uniform disk with a mass of 150 kg and radius of 1.3 m rotates with an angular speed of 1000 rev/min. A constant tangential force is applied at a radial distance of 0.7 m. How much work must this
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the
An electron moving along the x axis has a position given by x = 11te-1t m, where t is in seconds. How far is the electron from the origin when it momentarily stops?
What is the magnifying power of an astronomical telescope having 0.1 diopter object and 20 diopter of eye piece. also find the length of the telescope.
Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 3.0 105 N over a distance of 2600 km. What is the final speed of the probe?
A 500 turn solenoid, 25 cm long, has a diameter of 2.8 cm. A 10 turn coil is wound tightly around the center of the solenoid. If the current in the solenoid increases uniformly from 0 to 5.0 A in 0.
What is the magnitude of the net torque exerted on the branch by the children? Assume that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the b
A 2.1 x 10^3 kg car starts from rest at the top of a driveway that's sloped at an angle of 20.0 degrees with the horizontal. An avg. friction force of 4.0 x 10^3 impedes the cars motion so that the
A 77.9-kg fireman slides down a 4.13-m pole by applying a frictional force of 343 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
Sketch an x-t graph of the motion of both vehicles. Take x=0 at theintersection. sketch a vx-t graph of the motion of bothvehicles.
A tennis ball (m = 59 g) is projected vertically with an initial speed of 9.7 m/s. (a) If the ball rises to a maximum height of 3.1 m, how much kinetic energy was dissipated by the drag force of air
A car is traveling at 50.0 km/h on a flat highway. If the coefficient of friction between the road and the tires on a rainy day is 0.100, what is the minimum distance needed for the car to stop?
Start by observing the living species around you. Ever wonder why a pollinator is attracted to a particular flower, or what would happen to predator species if a particular prey species is eliminated?
What is the electromagnetic spectrum? Give examples of each kind of wave and relate each example to its relative position in the spectrum.
A long horizontal wire carries a current of 48 . A second wire, made of 2.2 diameter copper wire and parallel to the first, is kept in suspension magnetically 15 below . What is the current of the s
The skis have a thrust of 200 N. Sams speed at the bottom is 40 m/s. What is the coefficient of kinetic friction of his skis on snow?
A 100 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0 below the horizontal. The coefficient of kinetic friction is 0.200. What should be the magnitude of
During 5 successive 0.97 min intervals, a runner moves at the following constant speeds: 0.436 km/min, 0.250 km/min, 0.160 km/min, 0.160 km/min, and 0.320 km/min. Compute the total distance travele
How is information about DNA structure used as a taxonomic tool?
An automobile club plans to race a 710 kg car at the local racetrack. The car needs to be able to travel around several 160 m radius curves at 93 km/h. What should the banking angle of the curves be