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a force of 60 N causes an object to have an acceleration equal to 4 m/s2. What is the object's mass
A composite bar oflength L = L1 + L2 is made from a bar of material 1 and length L1 attached to a bar of material 2, Show that the coefficient of linear expansion
Tension is maintained in a string as in the figure below. The observed wave speed is v = 21.0 m/s when the suspended mass is m = 3.00 kg. What is the mass per unit length of the string
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor, How tall is the tower
An oscillatory water wave has a period of 2.56 seconds and a wavelength of 7.12 cm. What is the angular frequence
An airplane pilot sets a compass course due west and maintains an airspeed of 213km/h. Find the magnitude of the wind velocity
A block is at rest on a plank whose angle can be varied. The angle is gradually increased from 0 deg. find the kinetic coefficent of friction between the block and the plank
Suppose you have a rectangular wooden block with dimensions 8.0 cm x 8.0 cm x 9.0 cm that has a density of 0.85 x 10^3 kg/m^3. What is the volume of the wood in the wooden block
A large parallel plate capacitor has plate separation of 1.01 cm and plate area of 231 cm2. How much work is done on the capacitor as the plate separation is increased to 2.02 cm
A uranium and iron atom reside a distance R = 59.70 nm apart. The uranium atom is singly ionized; the iron atom is doubly ionized. what is the magnitude of the force on the electron from the uranium
A 0.32-kg object connected to a light spring with a force constant of 22.4 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
A child's toy consists of a piece of plastic attached to a spring, estimate the force constant of the spring
A 60.0-g object is attached to a horizontal spring with a force constant of 15.0 N/m, What is the velocity of the object
A cell membrane has a surface area of 1.00 x 10-7 m2, a dielectric constant of 5.17 and a thickness of 8.17 nm. How many positive ions are there on the outside of the membrane
A 60.0-g object is attached to a horizontal spring with a force constant of 15.0 N/m, What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless
An electron close to a large, flat sheet of charge is repelled from the sheet with a 2.2pN force. Find the surface charge density on the sheet
Three point charges are located in the x-y plane. q1 = +78.2 nC at (0.0, -4.6 cm), q2 = -36.4 nC at (+5.8 cm, 0.0) and q3 = +77.4 nC at (-6.2 cm, +8.4 cm). Determine the magnitude of the net electri
A uniform line of charge that is 20.0 cm long has a total charge of -6.00 ?C. What is the electrostatic force on the electron
A 2.9-cm-tall object is 35 cm in front of a converging lens that has a 8.8 cm focal length. Calculate the image position and height
A sinusoidal wave travels along a stretched string. A particle on the string has a maximum velocity of 1.00m/s and a maximum acceleration of 270m/s^2. Find the frequency of the Wave
You decide to determine the depth of a tank of water using the sun's light. With the sun overhead, the tank's bottom is lit, Approximately how deep is the tanks
Suppose a car is traveling at +20.4 m/s, and the driver sees a traffic light turn red. obtain the stopping distance of the car
A car owner forgets to turn off the headlights of his car while it is parked in his garage. how long will it take the battery to completely discharge
What is the required resistance of an immersion heater that will increase the temperature of 0.50 kg of water from 10.0°C to 50.0°C
A certain compact disc player draws a current of 340 mA at 27.0 V. How much power is required to operate the player