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The temperature in an electric oven is 192 °C. The temperature at the outer surface in the kitchen is 35.1 °C. The oven (surface area = 1.65 m2) is insulated with material that has a thickn
Calculate the average "walking" speed in normal times in units of m/s. Also calculate the average "walking" speed in windy times.
A jogger runs in a straight line with an average velocity of 5.1m/s for 2.1 min, and then with an average velocity of 4.9 m/s for 2.6 min. What is her total displacement in units of m. And what is h
What is the force required to load the speciment to yeild point? What is the length of the specimen when the load is held at yield point and what is the length of the specimen when the load is relea
How far on the screen are the first bright fringe and the second dark fringe from the central bright fringe? Express your answers in millimeters.
The wall is 0.11 m thick and has an area of 8.8 m2. Assume that one kilowatt hour of electrical energy costs $0.10. How many hours are required for one dollar's worth of energy to be conducted throu
What is the net force exerted by these two charges on a third charge = 50.0 placed between and at = -1.220 ? Your answer may be positive or negative, depending on the direction of the force. Express
Steel expands 11 parts in a million for each 1 ^\circ \rm C change. Consider a 40,000-{\rm km} steel pipe that forms a ring to fit snugly all around the circumference of the Earth. Suppose people al
An infinite line charge of uniform linear charge density = -1.1 C/m lies parallel to the y axis at x = -1 m. A point charge of 2.1 C is located at x = 2.0 m, y = 3.0 m. Find the x- and y-components
The force vector. A has a magnitude of 75.0 newtons (N) and points due east. The force vector B has a magnitude of 139 N and points 74.1 ° north of east. Find the (a) magnitude and (b) direction
How large must the volume of oxygen in the fish's swim bladder be if the fish is to have neutral buoyancy?
C1=5.00 muF and C2=12.0 muF are connected in PARALLEL, and the resulting combination is connected to a 9.00V battery. a) Find the potential difference across each capacitor
Ignoring the small amount of heat gained by the thermometer, find the specific heat capacity of the unknown material. Can someone actually help walk me through this instead of giving an answer with
A certain capacitor stores 380 J of energy when it holds 7.2 10-2 C of charge. (a) What is the capacitance of this capacitor? µF (b) What is the potential difference across the plates?
A metal ball with a mass of 4.01·10-6 kg and a charge of +4.99 mC has a kinetic energy of 7.95·108 J. It is traveling directly at an infinite plane of charge with a charge distribution
As an electron moves through a region of space, its speed increases from 3.00 106 m/s to 7.20 106 m/s. The electric force is the only force acting on the electron. (a) Did the electron move from a h
What is the rate at which this work is done by the electric organs during a pulse?
What pressure does the man exert on the frozen crust of the snow when he puts his entire weight on one booted foot?
How large must the volume of oxygen in the fish's swim bladder be if the fish is to have neutral buoyancy? The fish has a mass of 0.82 kg. Assume the density of oxygen in the bladder is equal to air
A tennis ball traveling with velocity v=15m/s strikes a vertical wall and bounces back at v2=-20m/s. If the change in the kinetic energy of the ball is 8.7 J, find the change in momentum.
An arrow is shot at an angle of theta=45 degrees above the horizontal. The arrow hits a tree a horizontal distance D=220m away, at the same height above the ground as it was shot. Use g=9.8m/s^2 for
Forces acting on the arm of a person lifting a dumbbell. The force F is the force pulling on the hand due to the weight of the dumbbell, the force W, arm is the weight of the arm and T is the tensio