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Ilya and Anya each can run at a speed of 8.70 \rm{mph} and walk at a speed of 3.60 \rm{mph}. They set off together on a route of length 5.00 \rm{miles}. Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half.
How long does it take Ilya to cover the distance?
Now find Ilya's average speed.
a 25-kg iron cannonball is fired with speed 220 m/s. If it hit a concrete wall, how much does the temperature of the cannonball increase
A plastic bag is filled with nitrogen at atmospheric pressure and 27.0 oC. How large a volume of nitrogen (in m3) is required
The upward velocity of the 5 kg block is v1 = 3 m/s when it is at a height ht = 10 m from the sandy surface. Determine time to stop the motion of the block if the average impulsive force acting on the block
To fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the cornea-the front surface of the eye. Determine the radius of curvature of the cornea
A 120-V rms voltage at 60.0 Hz is applied across an inductor, capacitor and a 100-%u03A9 resistor in series. what is the rms value of the current in this circuit
Wavelengths of light from a remote galaxy are found to be 1.5 % longer than the corresponding wavelengths measured here on earth. What ids the speed of the galaxy relative to earth
If the two halves of the log only separate by a distance of 0.05m while the wedge travels 0.2m into the log, how much force is the wedge exerting on the two halves of the log to rip them apart.
A weather balloon rises by the atmosphere, its volume expanding from 4.4m^3 to 10m^3 as temperature drops from 17 Degrees C to -13Degrees C.
The period of a macroscopic pendulum made with a mass of 10 g suspended from a massless string 50 cm long is 1.42 s. Compute the ground-state (zero-point) energy
Suppose that the resistance of such a resistance thermometer is 105? when its temperature is 17.2 °C. The wire is then immersed in a liquid, What is the temperature of the liquid
Calculate the direction, magnitude and line of action of the vertical and horizontal components of hydrostatic force acting on a surface.
A 37.0-kg child swings in a swing supported by two chains, each 3.06 m long. The tension in each chain at the lowest point is 436 N. Find the child's speed at the lowest point
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