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Vector points at an angle of 20.0° above the x axis and has an unknown magnitude. Vector has an x component Bx = 31.0 m and has an unknown y component By. These two vectors are equal. Find (a) the magnitude of and (b) the value of By.
A 5.0-um strand of DNA carries charge +e per nm of length. Treating it as a charged line, What is the electric field strength 21nm from the DNA, not near either end
Three point charges have equal magnitudes, two being positive andone negative. These charges are fixed to the corners of anequilateral triangle, as the drawing shows. The magnitude of eachof the charges is 6.0 μC, and the lengths of the sides of t..
an electron moves along the z-axis with vz 4.4 x 107 ms. as it passes the origin what are the strength and direction
You are standing 2.5 {rm m} straight in front of one of the two loudspeakers. They are 3 {rm m} apart and both are playing a 686 {rm Hz} tone in phase. As you begin to walk directly away from the speaker, at what distances from the speaker do you ..
A 77.5 kg bobsled is pushed along a hor- izontal surface by two athletes. After the bobsled is pushed a distance of 5.0 starting from rest, Find the magnitude of the net force on the bobsled
A person makes a quantity of iced tea by mixing 500 g of hot tea (essentially water) with an equal mass of ice at its melting point. Assume that mixture has negligible energy exchange with environment. If tea's initial temperature is Ti = 90 C, when ..
A parallel-plate capacitor has circular plates of 10.1 cm radiusand 1.28 mm separation. (a) Calculate the capacitance in picofarads. (b) What charge in nanocoulombs will appear on the plates if a potential difference of 135 V is applied?
Molecule of DNA (deoxyribonucleic acid) is 2.23 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.19% upon becoming charged, and remains in th..
A 100 kg quaterback is traveling 5 m/s and is stopped by atackler in 1 second, find the initial momentum ofthe quater back
A stone is thrown upwards from the edge of a clif 20m high. It just misses the cliff on the way down and hits the ground below with a speed of 30m/s. a. With what velocity was it released?b. What is its maximum height above the cliff?
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a string tightly wind around the inner core. The spool is free to roll without slipping on a horizontal surface.
A 1.1 kg hollow ball with a radius of0.12 m, filled with air, is releasedfrom rest at the bottom of a 1.9 mdeep pool of water. How high above the water does the ball shoot upward
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