True or False? An object with constant nonzero acceleration can never stop and remain at rest

1.False
2.True


2

Physics & Space Science

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The identical 50-kg masses are held at the corners of an equilateral triangle, 30 cm on each side

If one of the masses is released, what is its initial acceleration, if the only forces acting on it are the gravitational forces due to the other two masses? A) 3.7 × 10-8 m/s2 B) 2.5 × 10-8 m/s2 C) 1.9 × 10-8 m/s2 D) 4.2 × 10-8 m/s2 E) 6.4 × 10-8 m/s2

Physics & Space Science

In an adiabatic free expansion

a. no heat is transferred between a system and its surroundings. b. the pressure remains constant. c. the temperature remains constant. d. the volume remains constant. e. the process is reversible.

Physics & Space Science

An unfueled 1000-kg experimental rocket sled at rest on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20 s "burn.". The rocket moves at 160 m/s after the burn. What average force is experienced by the rocket during the burn?

a. 0.80 × 10^4 N c. 0.60 × 10^4 N b. 0.75 × 10^4 N d. 0.35 × 10^4 N

Physics & Space Science

How many orders are in the spectra formed by a grating with 3000. lines/cm illuminated by red light of wavelength 600. nm?

A) 1 B) 5 C) 0 D) 4 E) 3

Physics & Space Science