6. Your hand is wrapped around a cold iron bar. Your hand has 1000 J of thermal energy before touching the bar and 900 J after holding the bar for a minute. How much energy has the bar gained in the time of contact?

1000 J

100 J

900 J

1900 J

7. Which statements below best describes colors. Check any that apply.

black pigment is the absorption of red, green, and blue light

white pigment is the absorption of red, green, and blue light

black pigment is the reflection of red, green, and blue light

white light is the combination of red, green, and blue light

8. Show that the value for both the Celsius scale and the Fahrenheit scale would be the same at -40. Show all of your work to receive full credit.

9. Which of the below are types of energy? Check all that apply.

Potential

Heat

Momentum

Kinetic

10. The focal distance for a convex lens is 80 cm. What kind of image is produced when the object distance is greater than 160 cm?

inverted and smaller

upright and larger

upright and smaller

inverted and larger