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1. A 50.0 kg block is pulled from rest by a force of 1000.0 N at an angle of 37.0° across a horizontal rough surface over a distance of 5.60 m. The coefficient of kinetic friction between the block and the surface is 0.500. a) Draw a free body diagram and show all the applied forces. b) How much work is done by force F? c) How much work is done by the normal force? d) How much work is done by the gravitational force? e) How much work is done by the friction force? f) What is the net work done on the block? g) What is the change in kinetic energy of the block?
The concrete wall of a building is 0.136 m thick. The temperature inside the building is 22.3 °C, while the temperature outside is 0.0 °C. What is the emissivity of the wall
A 1kg of ice at -30° C is added to 10 kg of steam at 500°C. answer the following questions, What is the final temperature when the equilibrium is established
the scientific method is used by scientists to understand the natural laws that the universe obeys. scientists are not
A 7.0 kg object undergoes an acceleration of 2.5 m/s2. What is the magnitude of the resultant force acting on it
A 16 cm-diameter compressed-air tank is 30 cm tall. The pressure at 20 degrees C is 140 atm. What volume would this air occupy at STP
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water
An airoplane takeoff speed is 320km/h. if its average acceleration is 2.9m/s^2, how long is it on runway after starting its takeoff roll.
Television sets sometimes use a rabbit ears antenna to the right. A rabbit-ears antenna consists of a pair of metal rods. The length of each rod can be adjusted to one quarter of the wavelength of an electromagnetic wave whos frequency is 125 Mhz...
Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 2.8 . Two of the particles have a negative charge: = -6.7 and = -13.4 . The remaining particle has a positive charge, = 8.0 . What is ..
A microscope slide is placed in front of a converging lens with a focal length of 2.18 cm. The lens forms an image of the slide 10.3 cm from the slide. How far is the lens from the slide if the image is real
There is a clever kitchen gadget for drying lettuce leaves after you wash them. what is the magnitude of the centripetal acceleration at the outer wall
A 15.0-µC particle with a mass of 2.80 10?5 kg moves perpendicular to a 1.01-T magnetic field in a circular path of radius 28.0 m. How long will it take the particle to complete one orbit
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