A chair is placed on a rug. Then a book is placed on the chair. The floor exerts a normal force
a. on all three.
b. only on the book.
c. only on the rug.
d. upwards on the rug and downwards on the chair.
e. only on the objects you have defined to be part of the system.
c
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Two capacitors with capacitances of 2.0 and 3.6 ?F, respectively, are connected in series. The system is connected to a 40-V battery. What charge accumulates on the 2.0-?F capacitor?
a. 220 ?C b. 31 ?C c. 2 100 ?C d. 51 ?C e. 290 ?C
The element named ______________ was detected spectroscopically on the Sun before it was found on Earth
Fill in the blank(s) with correct word
To get the space velocity of a star in three dimensions, you need its proper motion, distance, and radial velocity
Indicate whether the statement is true or false
A 0.6-kg sample of a wooden artifact has an activity of 2.00 × 10^3 decays per minute. What is the age of the artifact? Note that living material has an activity of 15.0 decays/minute per gram of carbon present, and T1/2 for 14C is 5730 yr
a. 12,434 yr b. 8,618 yr c. 18,164 yr d. 12,590 yr