The pinhole experiment of casting images of the Sun with a card in sunlight depends on
A. exactly straight rays of sunlight.
B. round pinholes.
C. a relatively short distance between the pinhole and the ground below.
D. none of the above.
Answer: A
You might also like to view...
Suppose that the same amount of heat is added to both a 5-liter and a 10-liter container of water. The change in temperature of the 5-liter container will be
A. greater. B. less. C. the same. D. indeterminate
In a particular chemical reaction 3 bonds are broken and 4 bonds are formed. Based only on this information, which of the following is true?
A) The reaction has a high activation energy. B) The reaction is endothermic. C) the reaction is exothermic. D) We cannot determine which of the above is true.
Scientists use ________ to forecast climate change
A) historical data B) computer simulation models C) statistics D) political mandate E) CO2 concentrations
What is the system of social distinction in Indian reinforced by language, region and occupation?
A) dharma B) jati C) adivasi D) dalit E) none of the above