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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?
A long, straight wire runs along the axis of the solenoid, carrying a current of 15. Find out the magnitude of the net magnetic field a radial distance of 0.80 from the straight wire.
Two loud speakers separated by a distance of 2.0 m are in phase. Assume the amplitudes of the sound from the speakers are approximately the same at the position of the listener, For what frequencies is the signal a maximum
A horizontal board weighing 198 N is supported at points A and B. The plank serves as a platform for a painter, who weighs 558.5 N. Find out the maximum distance D, such that the plank would not tip, no matter where the painter stands.
A large punch bowl holds 3.80kg of lemonade (which is essentially water) at 20.0?C. A 5.10×10?2-kg ice cube at -10.0?C is placed in the lemonade. What is the final temperature of the system
What is the current in the wire.
At point A , 5.0m from a small source of sound that is emitting uniformly in all directions, the intensity level is 56.0 dB, obtain the intensity of the sound
While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.97 m/s. At what speed does the stone impact the ground
The mean diameters of X and Y, two planets in the same solar system, are 6.4 103 km and 1.2 104 km, respectively. The mass of X is 0.25 times the mass of Y. The value of g on Y is 8.8 m/s2.
A 25.0g sample of copper at 363 K is placed in 100g of water at 293 K. Calculate final temperature of the water
Janet jumps off a high diving platform with a horizontal velocity of 1.55 m/s and lands in the water 1s later. How high is the platform? The acceleration of gravity is 9.80 m/s2.
A particular heat engine has a mechanical power output of 6.00 kW and an efficiency of 28.0%, Find the energy taken in during each cycle
A box is pushed across the floor, slide with a constant velocity, and is opposed by a friction force of 25N. What is the magnitude of the force? Choose the correct answer. A.Less than 25N B.Zero C.Greater than 25N D.25n
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