Mercury's core is unusually ________, which may help explain its magnetic field
Fill in the blank(s) with correct word
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The mass of a high speed train is 4.5×105kg, and it is traveling forward at a velocity of 8.3×101m/s. Given that momentum equals mass times velocity, determine the values of m and n when the momentum of the train (in kg?m/s) is written in scientific notation.?
How do we calculate centripetal acceleration?
a. By calculating the acceleration at several points around the circle and averaging. b. By subtracting two velocity vectors separated by a short time interval. c. By adding two velocity vectors separated by a short time interval. d. By calculating the change in speed. e. By calculating the acceleration at several points around the circle and finding the sum.
When a car, moving at velocity v, collides head on with a light volley ball, initially at rest, the ball bounces off with velocity
A) -v. B) -4v. C) -1.5v. D) -2v. E) -v/2.
A 400-m tall tower casts a 600-m long shadow over level ground. At what angle ? is the sun elevated above the horizon?
A) 33.7° B) 41.8° C) 48.2° D) 65.1° E) Can't be found; not enough information.