We can see each other in the classroom right now because we
A) emit thermal radiation.
B) emit visible light.
C) emit infrared light.
D) reflect visible light.
E) reflect infrared light.
D
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As a skier gains speed skiing down a slope, ______ energy is being converted to _________ energy
Fill in the blank(s) with correct word
A general name for an intrusive igneous rock formation is ______________
a. discordant b. dike c. concordant d. pluton
A 4.0-cm tall object is placed 50.0 cm from a diverging lens having a focal length of magnitude 25.0 cm. What are the nature and location of the image? The image is
A) real, 1.3 cm tall, and 16.7 cm from the lens on the same side of the object. B) virtual, 1.3 cm tall, and 16.7 cm from the lens on the same side of the object. C) virtual, 4.0 cm tall, and 20 cm from the lens on the side opposite the object. D) real, 4.0 cm tall, and 20 cm from the lens on the side opposite the object. E) virtual, 2.0 cm tall, and 10 cm from the lens on the side opposite the object.
Slanting Surfaces Without Friction: A slanted roof rises at 35° above the horizontal, and the straight-line distance from the top of the roof to the bottom edge is 4.5 m. The roof is covered with ice, so it offers no friction to objects sliding on it. A piece of ice at the top suddenly breaks loose and begins to slide down from rest.(a) How long will it take for the ice to reach the bottom edge of the roof?(b) How fast will the ice be traveling just as it reaches the bottom edge?
What will be an ideal response?