1,308 Answered Questions for the topic physical science

Physical Science Geology Surface Atmosphere

03/19/19

Why do rocks on other solar system bodies that have an atmosphere seem to be flat?
Images taken by landers on Titan and Venus and Mars show landscapes where rocks, to me at least, are surprisingly flat. Being used to walking around in forests with roundish meter sized boulders,... more
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Physical Science Geology Earthquakes Geophysics

03/18/19

How do seismologists locate the epicenter and focus of an earthquake?
I know the focus of an earthquake is where the earthquake originated from, but what I could never figure out is, how to scientists find out where exactly the focus (and epicenter) are located?
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Physical Science Geology Formation Asteroids

03/18/19

How are boulders formed on asteroids?
For example: Are they soft landed meteorites? Or do they form from melted material during a violent impact? Or are they the result of some kind of erosion process?
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Physical Science Chemistry Physics

03/18/19

How does a microscope work?
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Physical Science Geology Teaching Rocks

03/18/19

How to learn the different types of rock?
I would like to be able to point to a piece of rock and say that is rock type *such and such*. I have tried learning but it literally seems like an endless list of types and sub types and the... more
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03/18/19

Why are deserts mostly located on the western side of continents?
I read somewhere in a book that mostly desert found in the western part of a continent. So my question is that why is it so? I searched on the internet but I didn't get a reasonable answer for that.
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03/18/19

In what geological situations can I find gold?
I've heard that gold ore is often associated with quartz veins. What geological processes enable gold particles to naturally cluster together like this? What characteristics/properties should I... more
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Physical Science Geology Gas Petroleum

03/18/19

What's it like inside a natural gas cavern on Earth?
I suppose natural gas underground caverns on Earth have substantial volume and gas is in gaseous form there. As such I wonder how it would look like inside such cavern (with artificial light of... more
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Physical Science Geology Petrology

03/18/19

When can taste be used to help identify rocks?
Taste can be used to distinguish halite (ordinary salt) from sylvite (which has some bitterness) and siltstone from mudstone (the latter has a creamy texture while the grains of the former can be... more
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Physical Science Geology Earth

03/18/19

Why is the Earth's center still hot after millions of years?
Why didn't the center of the earth cool after millions or billions of years? What keeps it hot?
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Physical Science

03/16/19

what is the velocity of an 8 kg lead shot put if it ahs 484 j of enrgy
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03/15/19

Why One Side of Mountain Range is Lush?
I'm new to this site and certainly not someone with any real background in atmospheric science, so please forgive me if this question is a little stupid. I recall learning in High School about... more
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Physical Science Statistics Weather Meteorology

03/14/19

What do weather forecasters mean when they say "50% chance of rain"?
What do weather forecasters mean when they say "50% chance of rain"? Even more confusing: weather report often says something like "30% chance of rain. >10mm", then the next day "70% chance of... more
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Physical Science Climate Meteorology Atmosphere

03/14/19

How to tell if a single day of weather is an anomaly or due to climate change?
I am interested in understanding how to tell if a single day of 'abnormal' weather is due to climate change or not. From my understanding, you would compare this day's weather to historical... more
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Physical Science Geology Geophysics

03/14/19

How is the mass of the Earth determined?
According to textbook knowledge, the mass of the Earth is about $6 × 10^{24}\\,\\mathrm{kg}$. How is this number determined when one cannot just weight the Earth using regular scales?
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Physical Science Geology Earth Rotation

03/14/19

Why isn't Earth a perfect sphere?
In general, almost everyone describes Earth as an perfect sphere, but in reality it isn't a perfect sphere. Is there any specific reason why Earth is not perfect sphere ?
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Physical Science

03/08/19

R2D2 rolls at 3.66 m/s for 90 seconds. How far does he go?
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Physical Science Ecology Earth Science

03/07/19

which is a good example of a shield volcano
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Physical Science

03/05/19

a freight train is moving at 13.5 m/s and accelerates at 2.50 m/s^2 and later is going at 39.0 m/s. how long is the train accelerating?
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Physical Science

03/04/19

Math, Physical Science
a boat is traveling at 15 mph with the current, which is moving at 3 mph. what is the combined speed
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Physical Science Math Science Physics

03/03/19

How to find acceleration due to gravity on jupiter
Jupiter is the largest planet in the solar system, with a mass of 1.90 x 1027kg and a radius of 7.18 x 107 m. A space probe of mass 185 kg is sent to the planet's surface to examine its atmosphere.... more
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Physical Science

03/02/19

A meteoroid changed velocity from 1.0 km/s to 1.8 km/s in 0.03 seconds. What is the acceleration of the meteoroid?
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Physical Science

03/02/19

A ball rolls down a ramp for 15 seconds.  If the initial velocity of the ball was 0.8 m/sec and the final velocity was 7 m/sec, what was the acceleration of the ball ?
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Physical Science

03/02/19

What is the speed of a walking person in m/s if the person travels 1000 m in 20 minutes?
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Physical Science

03/02/19

How many seconds will it take for a satellite to travel 450 km at a rate of 120 m/s?

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