A boy on the edge of a vertical cliff 20m high throws a stone horizontally outward with a speedof 20m/s. It strikes the ground at what horizontal distance from the foot of the cliff? Use g = 10m/s2.
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Evaluate (5.7×106 kg) × (6.3×10−2 m/s2) and express the answ…
Evaluate (5.7×106 kg) × (6.3×10−2 m/s2) and express the answer in scientific notation.
Average speed equals distance divided by time. On a journey…
Average speed equals distance divided by time. On a journey to the Alpha Centauri star system, a space probe travels a distance of 4.12×1016 meters in 1.73×1010 seconds. (a) Find its average speed in meters per second. (b) How long did the journey take in years? Use 365.24 days per year. 2e-12%
Which one of the following quantities is NOT a vector?
Which one of the following quantities is NOT a vector?
A horse gallops a distance of 10 kilometers in a time of 30…
A horse gallops a distance of 10 kilometers in a time of 30 minutes. It’s average speed is
An object dropped from the window of a tall building hits th…
An object dropped from the window of a tall building hits the ground in 12.0 s. If its acceleration is 9.80 m/s2, the height of the window above the ground is:
A ball thrown horizontally from a point 24 m above the groun…
A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown?
The average density of blood is 1.06 × 10 3 kg/m3 . If…
The average density of blood is 1.06 × 10 3 kg/m3 . If you donate a pint of blood to the Red Cross, what mass of blood have you donated, in grams? (1 pt = 1/2 L, 1 L = 1000 cm 3 )
An electron can tunnel through an energy barrier with probab…
An electron can tunnel through an energy barrier with probability 0.0000000000375. (This is a concept used in quantum mechanics.) Express this probability in scientific notation.
100 mL is equivalent to which of the following?
100 mL is equivalent to which of the following?