1,302 Answered Questions for the topic physical science

Physical Science Acceleration

05/13/19

What is the speed of the car after the braking?

A driver moving at 25 m/s applies his brakes for 1.5 seconds causing a deceleration of 2.3 m/s2. (Hint: deceleration is just negative acceleration; the sign is important to your calculation.)

05/12/19

Will dust storms be more frequent in the future?

I noticed that in some science fiction movies set in the future on Earth, like Wall-E and Interstellar, dust storms are very prominent. Are there any scientific hypotheses suggesting that dust... more
Physical Science Geology Plate Tectonics Mantle

05/12/19

What do continents "lay" on?

It's a simple question.. What do continents "lay" on? Do they float on water? or are they huge bodies that "emerge" from the sea floor/bed? are they connected to the bottom of the oceans? Hope the... more
Physical Science Science Physics Act Science

05/10/19

Which of the following is the best example of Newton's second law?

Which of the following is the best example of Newton's second law?A. A rolling ball comes to a stop because the forces of friction and gravity are acting upon it.B. The acceleration of a skydiver... more
Physical Science Science Physics Act Science

05/10/19

A student places a magnetic compass near an insulated copper wire with electric current moving through it. He notices that the compass needle no longer points north.

22.A student places a magnetic compass near an insulated copper wire with electric current moving through it. He notices that the compass needle no longer points north.Which of the following best... more
Physical Science Science Physics Act Science

05/10/19

A student calculates the potential energy of a roller coaster at the top of a hill.

16.A student calculates the potential energy of a roller coaster at the top of a hill. Then, she uses the kinetic energy equation to calculate the roller coaster's energy as it reaches the bottom... more
Physical Science Science Physics

05/10/19

The diagrams show the evaporator on a particle level before and after heat is absorbed.   Which diagram set best models how the evaporator works?

The diagrams show the evaporator on a particle level before and after heat is absorbed. Which diagram set best models how the evaporator works?A.B. C.D.
Physical Science Science Physics Physics B

05/10/19

Given the law of conservation of energy, what best explains why heat may be absorbed during a chemical reaction?

4.Given the law of conservation of energy, what best explains why heat may be absorbed during a chemical reaction?A. The energy of the reactants is less than the energy of the products.B. Chemical... more
Physical Science Ocean Meteorology Geophysics

05/09/19

Are there water molecules in the oceans which will almost never fall down as rain?

Some oceans are very deep. But is there also current (convection) deep in the ocean so that all water molecules will ones be evaporated and fall down as rain or is it very quite at the bottom so... more

05/09/19

If it rains harder, does it mean the rain's duration will be shorter?

If it rains real hard, is there a chance the rain's duration will be shorter? I think the if the rain in the clouds disperses with such force the rain will be over faster than if it was just a... more
Physical Science Geology Venus

05/09/19

Long term effect on rocks of high pressure and temperature?

The mean surface temperature of Venus is about 460 C and the pressure is about 92 atmospheres. Assuming this situation (or similar) has prevailed for millions of years what changes (if any) would... more
Physical Science Earth Science

05/08/19

Determining the distance from each station from the earthquake epicenter is?

The Lag time for CIL is 10 secondsThe Lag time for DTX is 70 secondsThe Lag time for MFL is 110 secondsThe S wave arrives at each station atCIL: 3:49.7DTX: 3:50.8MFL: 4:52.30The P waves travel... more
Physical Science Terminology Meteorology

05/06/19

Equinoxes and solstices: start of the season or mid-season?

In the United States, the upcoming autumnal equinox is marked on most calendars as the "first day of autumn." Similarly the solstices are commonly called the "first day of summer" and "first day of... more
Physical Science Geology Earth

05/06/19

Radioactive decay is the main source of the earth's interior heat: fact or theory?

It's believed the main reason that the interior of the Earth hasn't cooled down in 4 billion years is because of the ongoing decay of radioactive elements that keeps adding more heat than is lost... more
Physical Science Geology Petrology

05/06/19

What are the differences between geology, petrology, and lithology?

What differences are there between geology, petrology, and lithology? If I were to get into any of those fields, what exactly would I be studying? Also, are petrology and lithology just branches... more
Physical Science Geology Hydrology Water Table

05/05/19

Are there situations where the groundwater table doesn't follow the morphology of the surface?

In most or all geological site reports I read, the groundwater table (of the uppermost groundwater layer) always followed the morphology of the surface. Is this always the case? Are there signs for... more
Physical Science Math Science Biology

05/03/19

Write Complementary Sequence for DNA strand

I have the answer to this problem; however, I cannot seem to figure out why or how to solve it:What is the 5'-3' sequence of the complimentary DNA strand for the following image? The primer... more
Physical Science Physics Maths College

05/03/19

Newtons 3. law. IF I use force on something and make it move, why don't I move as well?

This is not a homework question. Just a concept I read from my physics book that I can't get the hang of yet.Newtons 3. law Says for every action there is an equal but opposite reaction. Meaning if... more

05/01/19

Io: Why so much sulfur?

Io is the only body in the Solar System whose crust is dominated by sulfur and its compounds. Carbon and nitrogen are also very common in the universe but we don't see them or their compounds in... more
Physical Science Science

04/28/19

How can the mechanical advantage of an inclined plane, or ramp, be increased?

How can the mechanical advantage of an inclined plane, or ramp, be increased? A. by making the ramp shorter B. by making the ramp steeper C. by making the ramp longer D. all of these
Physical Science Science

04/28/19

How does a lever apply forces with advantage?

How does a lever apply forces with advantage? A. It applies a small amount of force to produce a large amount of force. B. It gives the advantage of change in direction of the effort force. C. It... more
Physical Science Geology Geochemistry Volcanology

04/28/19

Is the magma in one volcano different from the magma in every other volcano?

First off, a confession: I'm asking this question because of *The Lord of the Rings*. If you're not aware already, in the story, a magical ring can only be destroyed in a specific volcano. The... more
Physical Science Meteorology Snow Precipitation

04/27/19

Transfer precipitation forecast in mm to expected snowfall in cm?

What conversion functions exist to transfer precipitation forecast in mm to expected snowfall in cm? Simple rules of thumbs as well as more advanced methods would be of interest.

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