Due to the high temperatures of the gas, what color do prominences appear as during a solar eclipse?
a. copper
b. blue
c. pink
d. violet
e. teal
c
Physics & Space Science
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If the maximum E-component of an electromagnetic wave is 600 V/m, what is the maximum B-component?
a. 1.4 T b. 1.8 × 10^?5 T c. 2.0 × 10^?6 T d. 1.0 × 10^?3 T e. 1.6 × 10^?10 T
Physics & Space Science
A heat engine absorbs 64 kcal of heat each cycle and exhausts 42 kcal
(a) What is the efficiency of this engine? (b) How much work does this engine do per cycle? What will be an ideal response?
Physics & Space Science
Dense biomass and tremendous species diversity characterizes the
What will be an ideal response?
Physics & Space Science
A 2.0-m wire carries a current of 15 A directed along the positive x axis in a region where the magnetic field is uniform and given by B = 
mT. What is the resulting magnetic force on the wire?
A.
(+1.2 
) N
) NB.
(?1.2 ) N
) NC.
(?1.5 ) N
) ND.
(+1.5 ) N
) NE.
(+0.90 ) N
) N
Physics & Space Science