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Q1. A positive charge of q = 3.5 µC is pulled on by two negative charges. One, -2.0 µC, is 0.050 m to the north and the other, -4.0 µC, is d = 0.029 m to the south. What total force is exerted on positive charge?
Q2. If air drag is negligibly small, how fast is a sequoia cone moving while it reaches the ground if it dropped from the top of a 114 tree?
Q3. Liquid nitrogen has a boiling point of 77.3 K and a latent heat of vaporization of 2.01 105 J/kg. A 60.0-W electric heating element is immersed in an insulated vessel containing 46.5 L of liquid nitrogen at its boiling point. How various kilograms of nitrogen are boiled away in a period of 7.50 h?
A high energy photon is scattered at an angle of ?=180.0° from an electron that is initially at rest. Find the energy of the incident X-ray photon
A 70.0 kg skier with an initial speed of 13.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at the top
A window air conditioner has an average coefficient of performance of 2.3. In a futile attempt to cool a bedroom, Determine the net heat added to the room by operating the air conditioner in this manner
3.00×104 of 300 C steam at a pressure of 20.0 is cooled until it condenses. What is the volume of the liquid water
The car accelerates uniformly to a speed of 2.05 m/s in 13.0 s and then continues at constant velocity.
A round loop of diameter 12 cm, carrying a current of 0.40 A, is placed inside a magnetic field B = 0.20 i T + 0.40 j T. What is the potential energy of the loop
A railroad car of mass 2.52 104 kg is moving with a speed of 4.06 m/s. It collides and couples with three other coupled railroad cars, How much mechanical energy is lost in the collision
The bellow of a territorial bull hippopotamus has been measured at 110 dB above the threshold of hearing
determine the largest angle MAX that the crutch can have just before it begins to slip on the floor.
A proton traveling 3.0 E 6 m/s enters half way in a capacitor and travels 2.00 E -3 meters before crashing into the bottom plate, What is the voltage applied to the capacitor from the battery
A 7.75 H inductor with negligible resistance is placed in series with a 15.7 V battery, a 3.00 ? resistor, and a switch. The switch is closed at time t = 0 seconds. Calculate the current as time approaches infinity
One of the harmonic frequencies of tube A with two open ends is 1020 Hz. The next-highest harmonic frequency is 1088 Hz. What is the number of this next-highest harmonic
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