Consider a student whose mass is 70 kg. If all his mass were converted to electrical energy, for how many years could he keep a 100-W light bulb burning?

(c = 3.0 × 108 m/s)


6.3 × 1016 s = 2.0 billion years!

Physics & Space Science

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For a nova to occur, the system must have already been a

A) astrometric binary. B) detached binary. C) spectroscopic binary. D) mass-transfer binary. E) eclipsing binary.

Physics & Space Science

Calculate the Earth's angular momentum in the approximation that treats the Earth's orbit around the Sun as a circle. (MSun = 1.99 × 1030 kg; T = 3.156 × 107 s; ME = 5.98 × 1024 kg.)

What will be an ideal response?

Physics & Space Science

A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right. What is the cart's displacement during the first 6.0 s of this motion?

A) 10 m B) 55 m C) 66 m D) 80 m

Physics & Space Science

The standard unit of mass in the SI is the ______________

Fill in the blank(s) with correct word

Physics & Space Science