An area of 100 cm2 is how many square meters?
A) 1.00
B) 1.00 × 102
C) 1.00 × 10-2
D) 1.00 × 104
E) 1.00 × 10-3
C
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The interstate on-ramp is 5.5 km West of your home, and on leaving for grandmother’s house you are only able to accomplish an average velocity of 38 km/hr between your home and the on-ramp. At the on- ramp, you wait for traffic, for 2.0 min – and then are able to proceed toward grandmother’s house. If you wish to arrive there, which is 15 km South of the on-ramp, over a river and through some woods, having achieved an average velocity of 42 km/hr, how fast do you need to drive south on the interstate highway?
A. 58 km/hr B. 48 km/hr C. 78 km/hr D. 39 km/hr
Lithium, beryllium, and boron are elements with atomic number 3, 4, and 5, respectively. Even though they are three of the five simplest elements, why are they rare compared to many heavier elements?
What will be an ideal response?
The outward pressure in the core of a red giant balances the inward pull of gravity when
A) hydrogen begins fusing into helium. B) carbon fuses into heavier elements. C) the electron orbits are compressed so much they are all in contact. D) the electrons and protons have combined to form neutrons. E) iron forms in the inner core.
A celestial object called a pulsar emits its light in short bursts that are synchronized with its rotation. A pulsar in the Crab Nebula is rotating at a rate of 30 revolutions/second. What is the maximum radius of the pulsar, if no part of its surface can move faster than the speed of light (3 × 10^8 m/s)?