What scales would you see distant filaments and voids?
A.) 10^24 m.
B.) 10^25 m.
C.) 10^26 m.
D.) 10^27 m.
E.) 10^28 m.
Ans: B.) 10^25 m.
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A 4.00-L container holds half a mole of an ideal gas at a pressure of 18.5 atm. What is the gas temperature? (R = 0.0821 L • atm/mol • K)
a. 1800 K c. 901 K b. 1190 K d. 450 K
An electron (charge ?1.6 × 10^?19 C) moves on a path perpendicular to the direction of a uniform electric field of strength 2.0 N/C. How much work is done on the electron as it moves 14.0 cm?
a. 5.6E–19 J b. ?2.8E–19 J c. 1.6E–19 J d. 3.9E–18 J e. zero
If the electric field and magnetic field of an electromagnetic wave are given by E = E0 sin(kx - ?t) and B = B0 sin(kx - ?t), and if the value of E0 is 51 µV/m, what is the value of B0? (c = 3.0 × 108 m/s)
A) 1.7 × 1014 T B) 1.7 × 103 T C) 1.7 × 10-14 T D) 1.7 × 104 T E) 1.7 × 10-13 T
A mass of 375 g hangs from a string that is wrapped around the circumference of a pulley with a moment of inertia of 0.0125 kg?m2 and a radius of 26.0 cm
When the mass is released, the mass accelerates downward and the pulley rotates about its axis as the string unwinds. What is the tension in the string? A) 1.21 N B) 2.45 N C) 3.68 N D) 1.84 N E) 0.605 N