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Two stationary positive point charges, charge 1 of magnitude 3.15nC and charge 2 of magnitude 1.75nC , are separated by a distance of 55.0cm. An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed of the electron when it is 10.0cm from charge 1? (answer in m/s)
A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance d = 6.30 cm from its unstretched position, determine the mass of the object
The resistance of a 100-cm wire of cross sectional area 2 × 10-6 m2 is 400 ?. What is the resistivity of the material of this wire
A pump is needed to lift 750 L of water per minute a distance of 25.0 M. What power (in KW) must the pump be able to deliver? (1L of water has a mass of 1 kg.)
Assume the sound speed in air is 343 m/s. A jet aircragt's engines emit an 850 Hz roar. What frequency do you hear if the aircraft approaches you at 540mph
a 9-v battery is connected across a capacitor of 20 microf through a switch which is initially open. the amount of
A beam of electrons is accelerated through a potential difference of 10kV before entering a velocity selector. If the B-field of the velocity selector is perpendicular to the velocity and has a valueof 0.05 T, what value of the E-field is required..
Two people (one having a mass of 40 kg and the other having a mass of 60 kg) stand at one end of a small uniform boat of mass 100 kg and length 20 m. Determine how far the boat moves in the process assuming no friction between the boat and the wate..
You have an uncharged capacitor (12 x 10-6 F) and a resistor (1000 ohms) connected to a battery of 200 V at time t = 0, What is the initial current in the circuit
A large, flat, horixontal sheet of charge has a charge per unit area of 8.5%u03BCC/m^2. Find the electric field just above the middle of the sheet
In a certain binary-star system, each star has the a mass of 1.00 multiply.gif 10^30 kg, What is their period of revolution in Earth years
The wavelength of red helium-neon laser light is 632.8 nm. What is the wavelength of the laser light in the class that has an index of refraction of 1.5 in units of nm, What is the speed of the laser light in the glass in units of 10^8 m/s
A large power plant converts 1000 kg of water to steam every second to run its generators. Compute the amount of heat required each second just to vaporize the water, assuming this is done at 100 C. What is the power input in megawatts for this pu..
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