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An 18-year-old runner can complete a 10.0 km course with an average speed of 4.38 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.88 m/s. How much later (in seconds) should the younger runner start in order to finish the the course at the same time as the older runner?
What type of weather front will be responsible for the following weather forecast? "Cool today with rain becoming heavy by this afternoon. Slightly warmer tomorrow. "Winds south easterly becoming westerly to north westerly by the tomorrow morning."
A sailboat is travelling east at 4.0 m/s. A sudden gust of wind gives the boat an acceleration a = (1.35 m/s2 30° north of east). What is the boat's speed 6.0 seconds later while the gust subsides.
A fisherman standing on the edge of a pier hooks a fish on the surface of the water, and reels in the fishing line at a constant 0.50m/s. If the fisherman's fishing rod is a height of 3.0 m above the water, at what speed is the fish moving (horizonta..
What is the spring constant (k) of the bungee cord.At what time will the object be moving with a speed of 15 m/s.
estimate the speed of the car just before braking. how much time passes before the brick lands on the ground..
A uniform shaft, fixed at one end & free at other, is twisted so that each cross - section rotates through an angle proportional to the distance from the fixed end. If the shaft is released from rest in this position, determine the s
A box with a mass of 8 kg is lifted (without acceleration) through a height of 9 m, in order to place it upon the shelf of the closet.
At the edge of town, the driver again accelerates. the driver would usually maintain a constant acceleration that is less than the maximum
What is the magnitude of the normal force that each brake pad applies to the rim . find the length of the meterstick as measured in frame S1 according to classical physics. Reply in units of m.
An airplane flies 200km due west from city Band then 285 km in direction of 28 degrees north of west from city B to city C. in a straight-line distance how far is city C from city A.
Two objects are charged and their centers are separated by 31.6 cm. Object A is charged to 61 nC and object B is charged to 54 nC. What is the magnitude of the electrostatic force between them.
A perfectly insulated system has work done by it at a rate of 13 W. At what rate is the internal energy of the system changing?
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