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A 150-N sled is pulled up a 28 degree slope at a constant speed bya force of 100N. What is the coefficient of kinetic friction between sled and slope?
1 a notebook computer wire carries 1.5 a. how many electrons pass through the wire each second? 2 a 50-w and 100-w
a cylinder piece of metal .085m tall with a diameter of 3.90 cm has a specific gravity equal to 5.0. What is the mass of the cylinder in units of grams
A car is traveling at 66.2 mph. The driver applies the brakes and the car decelerates at 1.3 m/s2. What is the stopping distance
A 65.0 {\rm kg} person is put on an exercise program by a physicaltherapist, the goal being to burn up 510 food calories in eachdaily session. How many jumps should the person do persession
A 1.50-m-diameter MRI solenoid with a length of 2.20m has a magnetic field of 1.60T along its axis. find the emf in one turn of the solenoid's windings
At a certain time a particle had a speed of 77 m/s in the positive x direction, and 3.3 s later its speed was 36 m/s in the opposite direction. What was the average acceleration of the particle
A 48dB sound wave strikes an eardrum whose area is 4.2×10?5m^2. How much energy is absorbed by the eardrum per second
A 0.4 kg mass attached to a spring is pulled back horizontally across a table so that the potential energy of the system is increased from zero to 150 J. find the kinetic energy of the system after the mass is released
The balloon contains 0.30mol of helium starts at a pressure of 110 kPa and rises to an altitude where the pressure is 70.0 kPa, By what factor does its volume increase
A 23 g ball is fired horizontally with initial speed toward a 110 g ball that is hanging motionless from a 1.1m long string. The balls undergo a head on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle theta m..
Two railroad freight cars with masses 130 (Mg) and 170 (Mg) approach with equal speeds of 0.330 (m/s). What fraction of the original kinetic energy was lost in this inelastic collision
a cordless electric shaver uses energy at a rate of 3.7 w from a rechargeable 1.5-v battery. each of the charged
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