Consider a particle composed of quarks

(a) The negative pion is composed of what combination of up and down quarks?
(b) Is the negative pion a baryon or meson?
(c) Is the negative pion a lepton or a hadron?


(a) d
(b) meson
(c) hadron

Physics & Space Science

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How are the event horizon and Schwarzschild radius related?

A) The Schwarzschild radius is smaller than the distance from the singularity of a black hole to the event horizon. B) The Schwarzschild radius is equal to the distance from the singularity of a black hole to the event horizon. C) The Schwarzschild radius is greater than the distance from the singularity of a black hole to the event horizon. D) The size of the Schwarzschild radius is unrelated to the distance from the singularity of a black hole to the event horizon. E) The size of the Schwarzschild radius is proportional to the distance from the singularity of a black hole to the event horizon.

Physics & Space Science

The coefficient of linear expansion of copper is 17 × 10-6 K-1

A block of copper 30 cm wide, 45 cm long, and 10 cm thick is heated from 0°C to 100°C What is the change in the volume of the block? A) 2.3 × 10-5 m3 B) 4.6 × 10-5 m3 C) 5.2 × 10-5 m3 D) 6.9 × 10-5 m3 E) 13.8 × 10-5 m3

Physics & Space Science

A Young's interference experiment is conducted with violet argon laser light (? = 409 nm). The separation between the slits is 0.66 mm, and the interference pattern appears on a screen 3.8 m away. What is the spacing between the bright fringes? (1 nm = 10?9 m)

a. 1.5E–3 m b. 2.4E–3 m c. 1.5E+4 m d. 4.7E–3 m e. 1.6E–3 m

Physics & Space Science

An inductor has a current I = 0.5A cos[( 275 s-1 ) t] . The maximum emf across the inductor is equal to 0.5 V. What is the self-inductance of the inductor?

A) 4.37 mH B) 3.64 mH C) 2.75 mH D) 0.73 mH E) 1.43 mH

Physics & Space Science