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A migrating bird is initially flying south at 10 m/s. To avoid hitting a high-rise building, the bird veers and changes its velocity to 3 m/s east over a period of 2 s. What is the bird's average acceleration (magnitude and direction) during this 2 s interval?
In coming to a stop, car leaves skid marks 78 long on the highway. Assuming a deceleration of 7.1 estimate the speed of the car just before braking.
You drape a string over a pulley and hang a mass of 35kg from one end. You tie the other end to a point a distance L from the pulley so that the string is horizontal between this point and the pulley.
determine the speed of the ball after the ball. A positive charge q is fired by a small hole in the positive plate of a capacitor.
Transvers waves: Speed of wave on streatched string. Two steel wires are stretched with the same tension. The first wire has a diameter of 0.610 mm and the second wire has a diameter of 0.910 mm
Consider three containers of the same volume that are thermally insulated (no heat is transferred) from each other, but are connected by thin pipes that allow gas to pass freely from one to another.
As the fragment falls through the atmosphere, it is heated and some of the material is vaporized. Explain how you could determine the composition of this hot vaporized material from the light it emits.
A car traveling at 24.0 {rm m/s} runs out of gas while traveling up a 25.0^circ slope. How far would the car go up the hill before it runs out of gas.
A copper block is removed from a 300^0 C oven and dropped into 1 L of water at 20.0^0 C. The water quickly reaches 25.5^0 C and after that remains at that temperature. What is the mass of copper block.
A spherical Christmas tree ornament is7.18 cm in diameter.What is magnification of the image ofan object placed 8.6 cm away from the ornament.
he lower block in the figure is pulled on by a rope with a tension force of 20 N. The coefficient of kinetic friction between the lower block & the surface is 0.30. The coefficient of kinetic friction between the lower block & the upper block is a..
Laboratory measurement examine that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or moving away from us? At what speed.
How might a magician make the Statue of Liberty disappear? Imagine that you are sitting with some spectators on a circular platform that, unknown to all of you, can rotate very slowly. It is evening, and you can see the Statue of Liberty a short dist..
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