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A concave mirror has a focal length of 43.3 cm. The distance among an object and its image is 75.0 cm. Find (a) the object and (b) the image distance assuming that the object lies beyond the center of curvature.
A child is riding across a rough field on a sled. Together, she and the sled have a mass of 73 kg. The sled is being pulled by her brother at an angle of 16º with a force of 356 Newtons. What is her acceleration if the coefficient of kinetic friction..
Water is moving at a velocity of 1.50 m/s through a hose with an internal diameter of 1.60 cm. What is the flow rate in liters per second
In the park, a mom pushes tangentially on a hand-drivenmerry-go-round and is able to accelerate it from rest to afrequency of 20 rpm in 10.0 s. What force is required at the edge
The near point of a naked eye is 30 cm. When an object is placed at the near point and viewed by the naked eye, it has an angular size of 0.062 rad. A magnifying glass has a focal length of 17 cm, and is held next to the eye.
Radiation at temperature Ti fills a thermally insulated cavity of volume V. If the cavity expands isentropically to volume rV, how much work is done by the radiation , as a fraction of its initial energy? How much work would be done if the expansion ..
Chinook salmon are able to move through water especially fast by jumping out of the water periodically. Determine the average velocity of the fish for the entire process of jumping and swimming underwater
Years ago, a block of ice with a mass of about 19.0 kg was used daily in a home icebox. The temperature of the ice was 0.0°C when it was delivered. how much heat did a block of ice absorb
A reservoir has an area of 45000 sq.ft and a uniform thickness of 10 meters. Determine the pore volume of the reservoir
A 2000 kg truck traveling north at 41 km/h turns east andaccelerates to 57 kn/h. What is the change in thetruck’s kinetic energy? What is the magnitude of the change in the linear momentum of the truck (kg m/s)? What is the directionof the change in ..
A ball thrown horizontally at 22.0 m/s from the roof of a building lands 36.0 m from the base of the building. How high is the building
At the instant the car begins to accelerate, a truck with a constant velocity of 21 m/s passes in the next lane. Explain how far will the car travel before it overtakes the truck?
A car engines has an efficiency of 25 percent and produces an average of 23,000 Joule of mechanical work per sec during operation. Determine how much heat input is required
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