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Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm.
A device used in radiation therapy for cancer contains 7.40×10-1 g of cobalt 2760Co (59.9333819 u). The half-life of 2760Co is 2.72 yr. Determine the activity of the radioactive material.
A ship sets out to sail to a point 188 km due north. An unexpected storm blows the ship to a point 148 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle
A rifle bullet with a mass of 16.0 g traveling toward the right at 237 m/s strikes a large bag of sand and penetrates it to a depth of 21.3 cm. Determine the magnitude and direction of the friction
How much of the chain can dangle off the table until the chain pulls itself onto the floor?If it starts to fall from this position of "maximum dangle", how fast is the chain moving when it first hit
A 27 kg chair initially at rest on a horizontal floor requires a 376 N horizontal force to set it in motion. Once the chair is in motion, a 345 N horizontal force keeps it moving at a constant velo
A 430 microF capacitor is charged to 275 V . Then a wire is connected between the plates. How many joules of thermal energy are produced as the capacitor discharges if all of the energy that was st
An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave spherical curvature of 22.0 cm. Draw a principle ray diagram showing the formation of the image.
A vehicle is struck in its right front as it passes through an intersection, resulting in a rotational impact. Which of the passengers is subjected to the greatest acceleration forces?
A runner of mass m = 39 kg and running at 3.1 m/s runs as shown and jumps on the rim of a playground merry-go-round which has a moment of inertia of 371 kg·m2 and a radius of 2 meters. Assum
If the angle of incidence into the water from the carbon tetrachloride is 20, what is the angle of refraction into the air?
A speeder passes a parked police car at 48.0 m/s. The police car starts from rest with a uniform acceleration of 2.47 m/s2. (a) How much time passes before the speeder is overtaken by the police car?
A thermos contains 150 cm3 of coffee at 85 C. To cool the coffee, you drop two 11-g ice cubes into the thermos. The ice cubes are initially at 0 C and melt completely. What is the final temperature
The girl begins to walk along the plank at a constant velocity of 1.52 m/s relative to the plank. What is her velocity relative to the ice surface?
Suppose we have a 42.2 kg mass hanging on a steel wire over a pulley. We have .8 mm diameter in wire, made out of carbon steel (mass density p = 7860 kg/m^3. What is the linear mass density?
In a diesel engine, the piston compresses air at 304 K to a volume that is 0.0629 of the original volume and a pressure that is 48.2 times the original pressure. What is the temperature of the air a
The magnitude of each force is 207 N, the force on the right is applied at an angle 29 and the mass of the block is 14 kg. The coefficient of friction is 0.148. The acceleration of gravity is 9.8 m
Points A and B have electric potentials of 330 and 180 , respectively. When an electron released from rest at point A arrives at point C, its kinetic energy is . When the electron is released from r
If air resistance can be neglected and if your downward and upward initial speeds are the same, how will the speeds of the balls compare upon striking the ground?
Suzy the elephant weighs 65,000 N. The cross-sectional area of each foot is 0.10 m2. When she stands on all fours, what is the average stress on her feet? (b) Suzanne the stockbroker weighs 610 N.
A climber with a mass of 75 kg is attached to a 6.5 m rope with a cross sectional area of 3.5×10-4 m2. When the climber hangs from the rope, it stretches 3.4×10-3 m. What is the Young's
The plane of the loop is perpendicular to the direction of the magnetic field. What is the magnitude of the induced emf in that loop?
At rest, a car's horn sounds at a frequency of 370 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a f
What is the work function of this metal in eV ?(Notice that the stopping potential is the potential difference required to bring the electrons with the maximum kinetic energy to a complete stop.) in
Suppose that you carry out the experiment in the water (refractive index n = 1.33). If a light ray of a wavelength 513 nm (in air) is incident perpendicularly upon the grating (immersed in water), w