A water rocket, launched from the ground, rises vertically with acceleration of 25 m/s2 for 2.0 s when it runs out of "fuel." Disregarding air resistance, how high will the rocket rise?
a. 305 m
b. 356 m
c. 178 m
d. 130 m
e. 50 m
c
Physics & Space Science
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A 10.0-kg picture is held in place by two wires, the first one hanging at 50.0° to the left of the vertical and the second one at 45.0° to the right of the vertical. What is the tension in the first wire?
A) 69.6 N B) 50.8 N C) 98.1 N D) 69.4 N E) 23.8 N
Physics & Space Science
A wave front is not a surface of constant phase within a wave
Indicate whether the statement is true or false
Physics & Space Science
An object with a rest mass of 0.456-kg is moving at 1.20 × 108 m/s. What is the magnitude of its momentum? (c = 3.00 × 108 m/s)
A) 5.57 × 107 kg ? m/s B) 5.67 × 107 kg ? m/s C) 5.97 × 107 kg ? m/s D) 5.47 × 107 kg ? m/s E) 5.87 × 107 kg ? m/s
Physics & Space Science
Earth's core is
a. liquid. b. part solid and part liquid. c. solid. d. molten.
Physics & Space Science