A rocket engine consumes 450 kg of fuel per minute. If the exhaust speed of the ejected fuel is 5.2 km/s, what is the thrust of the rocket?
a. 42 kN
b. 39 kN
c. 45 kN
d. 48 kN
e. 35 kN
b
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The point in time when the expansion of the universe began is referred to the
A) big crunch B) cosmic detonation event C) big bang D) big blowup
A sled of mass 10. kg slides down a flat hill that makes an angle of 10.° with the horizontal. If friction is negligible, what is the resultant force on the sled?
What will be an ideal response?
In what sense is our unique Earth just "ordinary" from a cosmic perspective?
What will be an ideal response?
What characteristic of neutrinos other than their flavor is essential to the theory of neutron oscillation?
a. Their three different wavelengths. b. Their three different frequencies. c. Their three different electric charges (+, 0, and -). d. Their three different masses. e. Their three different colors.