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The human brain consumes about 22 W of power under normal conditions, though more power may be needed during exams.(a) How long can one Snickers bar (280 Cal per bar) power the normally functioning brain? (b) At what rate should you lift a 3.6-kg container of milk (one gallon) if the power output of your arm is to be 22 W? (c) How long does it take to lift the milk container during a distance of 1.0 m at this rate?
a 0.200-a current is charging a capacitor that has circular plates 10.0 cm in radius. if the plate separation is 4.00
The centripetal acceleration of a rotating disk is 5.9 m/s2. The radius of the disk is 0.74 m. What is the angular velocity of the disk
The refractive indices of materials A and B have a ratio of nA/nB = 1.71. The speed of light in material A is 1.36 x 108 m/s. What is the speed of light in material B?
A 50 kilogram pitching machine (excluding the baseball) is located on a frozen pond. Find the recoil speed of the pitching machine
An electric motor rotating a workshop grinding wheel at a rate of 9.70 101 rev/min is switched off. How long does it take for the grinding wheel to stop
The average speed of a nitrogen molecule in air is about 669 m/s, and its mass is 4.43×10-26 kg. If it takes 2.66×10-13 s for a nitrogen molecule to hit a wall and rebound by the same speed but moving in the opposite direction, what is the magnitude ..
an air conditioner draws 12 a at 220 v ac. the connecting cord is copper wire with a diameter of 1.450 mm.a. how much
A strip of copper 10 mm wide and 900µm thick is placed in a uniform magnetic field B vec of magnitude 0.30 T, with B vec perpendicular to the strip. A current i = 23 A is then sent during the strip such that a Hall potential dissimilarity V appears a..
A military gun is mounted on a railroad car (m = 1400 kg), Find the recoil velocity of the car
water flows through a horizomtal tube of length 25cm and internal diameter 1 mm under a constant head of the liquid
A 23kg child slides down a 4.0m -high playground slide. What is the change in the thermal energy of the slide and the seat of her pants
A 2.00 syringe has an inner diameter of 5.00, a needle inner diameter of 0.270, and a plunger pad diameter (where you place your finger) of 1.20. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. Suppose the ..
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