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A strong weightless rope has a mass m hanging from the middle of it, as shown. The tension force on each rope is 25 N, and the rope droops at an angle of 20.0°. How much mass is hanging from the rope?
A device consisting of four heavy balls connected by low mass rods is free to rotate about an axle. It is initially not spinning. what is the angular speed of the device
What is the energy density. Find out the lowest frequency that permits standing waves in both strings with a node at the junction. The standing wave pattern in each string may have a different number of loops.
A 7.80-g bullet moving at 640 m/s penetrates a tree trunk to a depth of 6.1 cm. find the average frictional force that stops the bullet
Two point charges, +3.33 µC and -6.70 µC, are separated by 1.29 m. What is the electric potential midway between them
An idealized voltmeter is connected across the terminals of a 15.5-V battery, and a 75.0 ohm appliance is also connected across its terminals. How much power is being dissipated by the appliance
An AA battery is connected to a parallel-plate capacitor having 4 diameter plates spaced 3 apart. How much charge does the battery move from one plate to the other.
Calculate the magnitude of the gravitational force exerted on a 429-kg satellite that is a distance of 2.91 times earth radii from the center of the earth. What is the magnitude of the earth's acceleration
An object of mass 2.93 kg, moving with an initial velocity of (4.90i) m/s, Find the final velocity of the composite object
Estimate the percent change in mass δm/m of a block of copper which is heated from 300 K to 400 K. The molar speci?c heat of copper is cP = 2.6·104 J/kmol·K and, its atomic weight is 29.
You and Maria each own identical spaceships. As you fly past Maria, you measure her ship to be 85m long and your own ship to be 100 m long. How fast is Maria moving relative to you
What is the magnitude of the horizontal net force. An 845-N sled is pulled a distance of 168 m. The task requires 1.20 multiplied by 104 J of work and is done by pulling on a rope with the force of 121 N. At what angle is the rope held.
Find the range of wavelengths seen in the hydrogen emission spectrum in the Brackett series. Find the shortest wavelength in the Brackett series
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