Physics, 25.01.2020 06:31 KHaire7013
1. which of the following to maintain the temperature of the planet by keeping radiation from reaching the surface and/or reflecting radiation back out into space?
a. ice
b. ozone layer
c. clouds
d. all of the above
2. which of the following to maintain the temperature of the planet by absorbing infrared energy?
a. water
b. atmosphere
c. soil
d. all of the above
3. what is the natural ph of the ocean?
a. acidic
b. basic
c. neutral
d. different depending on the location
4. which of the following is not harmed by acid rain?
a. concrete buildings
b. glass windows
c. marble statues
d. iron railroad tracks
5. what is the name of the scientist who discovered that all elements have a unique spectrum?
a. bohr
b. kepler
c. copernicus
d. ptolemy
Answers: 1
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Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx hurrim timed
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Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)
Answers: 3
1. which of the following to maintain the temperature of the planet by keeping radiation from reach...
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