Suppose the half-life of an isotope is 2 days. You purchase 10 grams of the isotope, but it was produced in a laboratory 4 days before it was delivered to you
How much of this isotope will you have 3 days after it was delivered to you?
A) more than 2.5 grams but less than 5 grams
B) 2.5 grams
C) 1.25 grams
D) more than 1.25 grams but less than 2.5 grams
E) less than 1.25 grams
E
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If the magnetic field of an electromagnetic wave is in the +x-direction and the electric field of the wave is in the +y-direction, the wave is traveling in the
A) xy-plane. B) +z-direction. C) -z-direction. D) -x-direction. E) -y-direction.
An atomizer works because of Bernoulli's principle
a. True b. False Indicate whether the statement is true or false
In an LC circuit containing a 40-mH ideal inductor and a 1.2-mF capacitor, the maximum charge on the capacitor is 45 mC during the oscillations. What is the maximum current through the inductor during the oscillations?
A) 3.7 A B) 42 A C) 6.5 A D) 10 A E) 2.5 A
Around which time of the year in the northern hemisphere is the Earth at the perihelion?
What will be an ideal response?