A ball is thrown straight upward from ground level with a speed of 18m/s How much time passes before the ball strikes the ground if we disregard air resistance?
A) 3.7 s B) 0.6 s C) 1.8 s D) 1.1 s
A
Physics & Space Science
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A banana will appear black when illuminated with
A) black light. B) blue light. C) red light. D) green light.
Physics & Space Science
A car of mass m1 traveling at velocity v passes a car of mass m2 parked at the side of the road. The momentum of the system of two cars is
A.
0.
B.
m1v.
C.
(m1?m2)v.
D.
E.
(m1 + m2)v.
Physics & Space Science
When the velocity and acceleration of an object have opposite signs, the speed of the object increases
Indicate whether the statement is true or false
Physics & Space Science
In the vicinity of what frequency does an object with a temperature of 1000 K radiate the largest amount of power?
(c = 3.00 × 108 m/s, Wien displacement law constant equals 2.90 × 10-3 m ? K, ? = 5.670 × 10-8 W/m2 ? K4) A) 8.0 × 1014 Hz B) 6.7 × 1014 Hz C) 2.3 × 1014 Hz D) 1.0 × 1014 Hz E) 4.1 × 1014 Hz
Physics & Space Science