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A person who eats 2843 Cal each day consumes 1.19008 × 107 J of energy in a day. How much water at 100?C could that much energy vaporize? The latent heat of vaporization of water is 2.26 × 106 J/kg. Answer in units of g.
An object of mass 1.2kg is placed 0.1m from the axis of a rotating turntable of variable speed. Find the number of revolutions per minute at which the object just starts to slide off
The 100-m dash can be run by the best sprinters in 10.0 s. A 70-kg sprinter accelerates uniformly for the first 45mm to reach top speed, What is the average horizontal component of force
A charged particle is moving horizontally westward with a velocity of 3.5 × 106 m/s in a region, What is the charge on the particle
Why should the voltmeter and ammeter be read simultaneously to decide the resistance of a circuit component? A radio with a resistance of 40 ohm and a clock with a resistance of 20 ohm are connected in series on a 120V line. What is the current? Wha..
An object 3.9 mm high is on the optical axis of two lenses with focal lengths f1 = +5.0 cm, f2 = +10 cm. The object is 6.1 cm to the left of the first lens, and the second lens is 33 cm to the right of the first lens. Find the position (relative t..
Liquid water at 25C and 1 bar fills a rigid vessel If heat is added to the water until it's temperature reaches 50C, what pressure is developed? The average value of B between 25 and 50C is 36.2x10^-5/K. The value of K at 1 bar and 50C is 4.42x10^-5/..
A tennis ball leaves the racquet in a serve traveling 68.3 m/s. A served tennis ball is typically in contact with the racquet for 30.0 ms (30.0 x 10-3 s). What was the ball's acceleration during this serve
A student hangs three masses from a force table. If the first mass of 250 g is at an angle of 130°, and she then hangs a mass of 205 g at 225°, calculate the mass and angle of the third mass so that the ring on the force table is in equilibrium? ..
A proton (mass 1.67 x 10-27) is moving at 1.25 x 10-6 m/s directly towards a stationary helium nucleus (mass 6.64 x 10-27). After a head-on collision, what is the helium's velocity
Find the minimum diameter of an l = 18.2 m long aluminum wire that will stretch no more than 7.70 mm when a mass of 339 kg is hung on the lower end
You are with 19 other people on a boat at rest in frictionless water. Your total mass is 1300 kg, and the mass of the boat itself is 10000 kg. Theentire party walks the 5.0 m distance frombow to stern. How far does the boat move?
A conducting sphere of radius r1 = 0.29 m has a total charge of Q = 2.2 uC, What is the total charge on sphere two, Q2 in C
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