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Q1. Assume that when you ride on your 7.60-kg bike the weight of you and the bike is supported equally by the two tires. If the gauge pressure in the tires is 78.5 lb/in2 and the area of contact between each tire and the road is 7.13 cm2, what is your weight?
Q2. A coil of Nichrome wire is 22.0 m long. The wire has a diameter of 0.400 mm and is at 20.0°C.
(a) If it carries a current of 0.520 A, what is magnitude of the electric field in the wire?
(b) If it carries a current of 0.520 A, what is power delivered to it?
(c) If the temperature is increased to 320°C and potential difference across the wire remains constant, what is the power delivered?
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
What is current flowing through the collider
The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker.
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s.What is the frequency heard by the observer . What must be the result have been for the horizontal speed.
What is the mass of sculpture (in kg) assume that the local acceleration due to gravity is 9.80 m/s2.
An airtight box has a removable lid of area 1.00 10-2 m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 7.00 104 Pa. The inside of the box is completely displaced. What is the magnitude of the force es..
What is relative velocity
It's found that string is set into oscillation only at the frequency 880 Hz and 1320 Hz as the frequency of an oscillator is varied over the range 500-1500 Hz. What is the tension in the string.
A person whose eyes are H = 1.64 m above the floor stands L = 2.3 m in front of a vertical plane mirror whose bottom edge is 38 cm above the floor. What is the horizontal distance x to the base of the wall supporting the mirror of the nearest point o..
How much work is completed on the box by the applied force
Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass and radius of orbit. The satellites fire rockets that provide force needed to keep a circular orbit around the space stat..
A diffraction grating with 395 lines/mm is 1.00 m in front of a screen. What is the wavelength of light whose first-order maxima will be 16.9 cm from the central maximum on the screen.
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