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Q1. A man pushes the lawn mower on a level lawn with a force of 240 N. If 40 percent of this force is directed downward, how much force is directed horizontally?
Q2. Two conducting wires a and b of circular cross-section have the same length and radii but are made from different metals. The resistivity of wire a is twice that of wire b. When these two wires are connected in equivalent to the same battery, describe the reasoning of the steps that allow you to find out which of these wires will consume the greater amount of power by warming up and dissipating this energy as heat.
Using their ship’s engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are at rest, 450 m apart. Explain how much time does it take for the ship and the asteroid to meet?
A small, 2.00-mm-diameter circular loop with R = 1.40×10?2? is at the center of a large 110-mm-diameter circular loop. What is the induced current in the inner loop
A narrow beam of white light is incident at 30deg on a 11.0cm -thick piece of glass. What is the index of refraction for deep violet light
A man stands at the midpoint between two speakers that are broadcasting an amplified static hiss uniformly in all directions. Find the total sound intensity that the man hears when he is at his initial position halfway between the speakers
A transverse wave is travelling in a denser medium is incident on a rarer medium. How the phase of the wave is affected
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 126-kg laser sensor which measures the thickness of the ice, find the tension in the cable towing the sensor
At a soft drink dispenser, a restaurant patron put 0.2 kg of crushed water ice, at a temperature of ?5 C, into an insulating cup. [In fact, the ice was slightly colder before it left the machine, but its warming to ?5 C cooled the inside surface o..
A 68-kg skater moving initially at 2.4 m/s on rough horizontal surface comes to rest uniformly in 3.52 s due to friction. What force does friction exerts on the skater
A ball is thrown against a smooth wall. The bass has mass 6.0g and strikes the wall in the perpendicular direction with a speed of 12 m/s. what is magnitude of the impulse delivered by the wall
A 2.0 mm tall object is 20.0 cm to the left of a diverging lens that has a focal length of f= -30.0 cm. how tall is the image?
A 66 cm long, 0.8 mm diameter steel guitar string must be tightened to a tension of 2100 N by turning the tuning screws. By how much is the string stretched
If 80g of ice at -20 oC is placed in 200g of water at 15 oC, how much ice melts, The specific heat of ice is 0.5 cal/g-K
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