The shortest wavelength of visible light is approximately 400 nm. Express this wavelength in centimeters
A) 4 × 10-5 cm
B) 4 × 10-7 cm
C) 4 × 10-9 cm
D) 4 × 10-11 cm
E) 400 × 10-11 cm
Answer: A
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a. lepton. b. baryon. c. meson. d. intermediate (or gauge) boson. e. hadron.
To what three types of modern survivors can the masses of the protogalactic blobs be compared?
What will be an ideal response?
An atom can be excited
a. if it emits a photon. b. if it collides with another atom or electron. c. if it absorbs a photon. d. if it emits a photon or if it collides with another atom or electron. e. if it collides with another atom or electron or if it absorbs a photon.
Uniform Circular Motion: A 2.0-kg ball is moving with a constant speed of 5.0 m/s in a horizontal circle whose diameter is 1.0 m. What is the magnitude of the net force on the ball?
A. 0 N B. 20 N C. 40 N D. 50 N E. 100 N