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A person that works for construction is riding an open elevator that is moving in an upward direction with a speed of 6.0 m/s. When he is 42 m above the ground he accidentally drops a hammer. What is the maximum height reached by the hammer? What is the time it takes for the hammer to fall to the ground and speed of the hammer when it hits the ground?
A train moving at a constant speed of 66.0 km/h moves east for 43.0 min, then in a direction 56.0° east of due north for 16.0 min, find the average velocity of the train during this run
The radius of the Sun is 6.95 × 108 m. It radiates heat at the rate of 5.42 × 1026 W. Assuming that it is a perfect emitter, what is the temperature of the surface of the Sun
A light ray enters a rectangular glass slab (n = 1.5) at point A at an incident angle theta, what is the index of refraction of the unknown liquid
If a 3.3 seconds time constant is to be tripled and you have a 1.3 µF capacitor, find by how much should the resistance change
In the drawing the head-up display is designed so that the distance between the digital readout device and virtual image 1 is 1.60 m. Find the focal length of the concave mirror
A 24V battery is connected in series with a resistor, R=4 ohms and an inductor L=2H. What is the energy stored in the inductor
Two capacitors of equal capacitance of 5 μF are connected to a 12V battery as shown below. Which point in the circuit has a higher potential a or b? Calculate the charge on each capacitor.
A 41.0 kilogram ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. Evaluate the pressure exerted by the floor over the area of contact
A 70.0 kg person throws a 0.0500 kg snowball forward with a ground speed of25.0 m/s. A second person, with a massof 55.0 kg, catches the snowball. Both people are on skates.
A cubical piece of heat-shield tile from the space shuttle measures 0.12 m on a side and has a thermal conductivity of 0.072 J/(s m · C°). How much heat flows from the outer to the inner surface of the tile in six minutes
A 1500-kg automobile is pulled behind a tow truck. The power exerted by the tow truck on the car is a constant 50 kW. Determine the time required to accelerate the automobile from rest to a speed of 60 km/h on a level road
A 3 kg block moves down a hill that makes a 40° angle with the horizontal direction. Ignoring friction and assuming g=10 m/s2, what is the magnitude of the acceleration of the block?
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