A concave mirror has a radius of curvature of 1.0 m. An object is placed 2.0 m in front of the mirror. Determine the location of the image (in cm)
a. 130
b. 83
c. 67
d. 150
e. 200
c
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The diagram below illustrates the radioactive decay of Potassium (40K), which has a half-life of 1.3 billion years. If a lunar rock is found that currently contains 5 grams of 40K, and it is determined that the sample contained 20 grams when it was formed, how old is the lunar rock?
a.
6.5 billion years
b.
19.5 billion years
c.
2.6 billion years
d.
3.9 billion years
e.
4.6 billion years
What is the wavelength of the matter wave associated with an electron moving with a speed of 2.5 × 107 m/s? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A) 29 pm B) 35 pm C) 47 pm D) 53 pm
Three point charges are placed on the x-axis. A charge of +2.0 ?C is placed at the origin, -2.0 ?C to the right at x = 50 cm, and +4.0 ?C at the 100 cm mark
What are the magnitude and direction of the electrostatic force that acts on the charge at the origin? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) What will be an ideal response?
Like Herbig-Haro objects associated with protostars, the lobes around radio galaxies are the result of ________ streaming from the active nucleus. Describe their alignment
Fill in the blank(s) with correct word