What is produced by the process of electrolysis?

A) energy
B) hydrogen and oxygen
C) pure drinking water
D) photovoltaic power


Answer: B

Physics & Space Science

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If you toss a ball straight upward at 40 m/s with no air resistance, one second before it reaches the top of its path its speed is

A) zero. B) 10 m/s. C) 20 m/s. D) 30 m/s E) 40 m/s.

Physics & Space Science

A very thin horizontal, 2.00-m long, 5.00-kg uniform beam that lies along the east-west direction is acted on by two forces

At the east end of the beam, a 200-N force pushes downward. At the west end of the beam, a 200-N force pushes upward. What is the angular acceleration of the beam? A) 240 rad/s2 north B) 1.33 × 102 rad/s2 north C) zero D) 240 rad/s2 south E) 1.33 × 102 rad/s2 south

Physics & Space Science

A camera has a lens of focal length 50 mm and an f-number of 4.0 . What is the diameter of the lens?

a. 50 mm c. 25 mm b. 100 mm d. 13 mm

Physics & Space Science

How might we tell whether the Universe is open or closed?

What will be an ideal response?

Physics & Space Science