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76cm long metal string under 38.0N tension has a linear mass density 2.10×104kg/m. discover the wave speed on this string. Find the frequencies of the first three harmonics
You plan to project an inverted image 30.0 cm to the right of an object. You have a diverging lens with focal length -4.00 cm located 6.20 cm to the right of the object. What is the focal length of the second lens
A camera is equipped with a lens with a focal length of 23 cm. how far from the film should the lens be placed
Children sled down a 45m -long hill inclined at 26?. At the bottom, the slope levels out. how far do the children slide on the level ground?
the blades in a blender rotate at a rate of 6600 rpm. when the motor is turned off during operation the blades slow to
A girl is using a rope to pull a box that weighs 300 N across a level surface with constant velocity. What is the friction force of the floor on the box
A 68.0-O resistor is connected in series with a 76.0-µF capacitor and a generator having a maximum voltage of 1.20 102 V and operating at 60.0 Hz
What's the charge of a glass rod after rubbing it on silk? What's the charge of silk afterrubbing with a glass rod ? What's the charge of a rubberrod after rubbing it on fur or wool? What's the charge of fur or woolafter rubbing it with a glass rod?
Find the magnitude of a electric dipole formed by an electron and proton separated by a distance of d=4.3nm. The charge of the proton and electron is 1.6x10^-19 C.
A 0.2 m^3 rigid tank initially contains refrigerant 134a at 1 MPa, saturated vapor. The tank is connected to a supply line that contains refrigerant 134a at 1.2 MPa, 30 degrees C. Refrigerant is allowed to enter the tank until the tank contains sa..
A burglar alarm is wailing with a frequency of 1200 Hz. What frequency does a cop hear who is driving towards the alarm at a speed of 40.0 m/s
two people carry a heavy electric motor by placing it on a light board 2.00 m long. one person lifts at one end with a
The plumbing in an old house uses lead pipes (which are now considered hazardous). what is the change in the length of the pipe
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