The connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better? AContrast BFaces CColors Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify: AThe edges of objects BThe center of objects CThe color of an object What assumption does our visual system make in order to see curved surfaces (domes, holes)? ALight comes from above BCurved surfaces are always evenly lit CCurved surfaces are always easy to see, no assumptions are made Which part of the face does our brain pay the most attention to? AEyes and mouth BEyes and ears CEyes and chin If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them? AIt helps us see things faster BIt helps us see things correctly CIt helps us pay attention to what's important DAll of the above
Solar energy is used to heat hot water in homes. Which describes what happens to the solar energy? A. Solar energy and thermal energy maintain kinetic equilibrium. B. Solar energy is conserved as it creates thermal energy. C. Solar energy is destroyed at the rate that thermal energy is created. D. Solar energy is transformed into thermal energy.
Which is not an example of work, according to the scientific definition A. lifting a suitcase off the floor B. pulling a sled across the snow C. leaning against a brick wall on the side of a building D. pushing a grocery cart Will it be C leaning against a brick wall on the side of a building?
When a fan is turned on, it changes electrical energy into _____________ energy. a. motion b.magnetic c. gravitational d.electromagnetic
Ja-Anna, has a mass of 45 kg, climbed 3m up a ladder to rescue her cat from a tree. how much work against gravity did she do?
what does the prefix mean in the word unicellular? list one other word with the same prefix and give an explanation of it
A clothes dryer in a home has a power of 4,500 watts and runs on a special 220-volt household circuit, 1.what is the resistance of the dryer? 2.what is the current through the dryer? 3.how many kilowatt-hours of electricity are used by the dryer if it used for 4 hours in one week?
