Can pure water conduct electricity?
A solution conducts current when positive and negative ions are randomly dissolved in it. Pure water doesn't have enough ions but when you add HCl you add a strong electrolyte so, after the addition, solution can conduct electricity very well.
@askmenow
A solution conducts current when positive and negative ions are randomly dissolved in it. Pure water doesn't have enough ions but when you add HCl you add a strong electrolyte so, after the addition, solution can conduct electricity very well.
@askmenow
Can it snow when it's below freezing?
It rarely snows when the temperature drops below zero degrees Fahrenheit (-18 degrees Celsius). But snow does sometimes fall even when it's that cold. Snow can fall even in the coldest place on Earth, Antarctica, at temperatures well below zero. It turns out that moisture is more important than temperature.
@askmenow
It rarely snows when the temperature drops below zero degrees Fahrenheit (-18 degrees Celsius). But snow does sometimes fall even when it's that cold. Snow can fall even in the coldest place on Earth, Antarctica, at temperatures well below zero. It turns out that moisture is more important than temperature.
@askmenow
Why do we blush when we are embarrassed?
Asap SCIENCE explains blushing as a reaction of the sympathetic nervous system and part of our “fight or flight” response. When you're embarrassed, adrenaline is released, speeding up your heart rate and dilating your blood vessels to improve your blood flow and oxygen delivery.
@askmenow
Asap SCIENCE explains blushing as a reaction of the sympathetic nervous system and part of our “fight or flight” response. When you're embarrassed, adrenaline is released, speeding up your heart rate and dilating your blood vessels to improve your blood flow and oxygen delivery.
@askmenow
Do snails have eyes?
Land snails have two sets of tentacles that stick out, the longer set of tentacles are the ones that have the snail's eyes. This way they can move their tentacles around to get the best view. Water snails, on the other hand, have eyes at the tentacles' base and they have only one pair of tentacles.
@askmenow
Land snails have two sets of tentacles that stick out, the longer set of tentacles are the ones that have the snail's eyes. This way they can move their tentacles around to get the best view. Water snails, on the other hand, have eyes at the tentacles' base and they have only one pair of tentacles.
@askmenow
How long is human gestation from conception?
The average length of human gestation is 280 days, or 40 weeks, from the first day of the woman's last menstrual period. The medical term for the due date is estimated date of confinement (EDC). However, only about four per cent of women actually give birth on their EDC
@askmenow
The average length of human gestation is 280 days, or 40 weeks, from the first day of the woman's last menstrual period. The medical term for the due date is estimated date of confinement (EDC). However, only about four per cent of women actually give birth on their EDC
@askmenow
What gas is released when you crack your knuckles?
The fluid contains the gases oxygen, nitrogen, and carbon dioxide. When you pop or crack a joint, you stretch the joint capsule. Gas is rapidly released, which forms bubbles. In order to crack the same knuckle again, you have to wait until the gases return to the synovial fluid.
@askmenow
The fluid contains the gases oxygen, nitrogen, and carbon dioxide. When you pop or crack a joint, you stretch the joint capsule. Gas is rapidly released, which forms bubbles. In order to crack the same knuckle again, you have to wait until the gases return to the synovial fluid.
@askmenow
How many Sudoku puzzles are there?
There are a total of 6,670,903,752,021,072,936,960 possible solutions, yet when mathematicians took away rotations, reflections, permutations and relabeling, which takes away the same puzzle in just a different form, the number of solutions was 5,472,730,538.
@askmenow
There are a total of 6,670,903,752,021,072,936,960 possible solutions, yet when mathematicians took away rotations, reflections, permutations and relabeling, which takes away the same puzzle in just a different form, the number of solutions was 5,472,730,538.
@askmenow
What height to reach terminal velocity?
A falling person will reach terminal velocity after about 12 seconds, falling some 450 m (about 1,500 ft) in that time. That person will not then fall any faster, so it makes no difference what distance they fall if it is more than 1,500 ft - they will still reach the ground at the same speed.
@askmenow
A falling person will reach terminal velocity after about 12 seconds, falling some 450 m (about 1,500 ft) in that time. That person will not then fall any faster, so it makes no difference what distance they fall if it is more than 1,500 ft - they will still reach the ground at the same speed.
@askmenow
How fast was the meteor that killed the dinosaurs?
Scientists calculate that it was blasted into Earth by a 10-kilometer-wide asteroid or comet traveling 30 kilometers per second -- 150 times faster than a jet airliner. Scientists have concluded that the impact that created this crater occurred 65 million years ago.
@askmenow
Scientists calculate that it was blasted into Earth by a 10-kilometer-wide asteroid or comet traveling 30 kilometers per second -- 150 times faster than a jet airliner. Scientists have concluded that the impact that created this crater occurred 65 million years ago.
@askmenow
Do bananas have seeds in them?
Wild bananas, prior to domestication, do have seeds. But like seedless grapes, humans have found and cultivated seedless mutations. So now all banana trees come from cuttings and there are no seeds in the fruit. The little brown specs in a banana are the vestiges of seeds that did not develop because of the mutation.
@askmenow
Wild bananas, prior to domestication, do have seeds. But like seedless grapes, humans have found and cultivated seedless mutations. So now all banana trees come from cuttings and there are no seeds in the fruit. The little brown specs in a banana are the vestiges of seeds that did not develop because of the mutation.
@askmenow
When is the next time the planets will align?
One calculation of alignments within around thirty degrees (about as close as they can get) shows that the last such alignment was in 561 BC, and the next will be in 2854. All nine planets are somewhat aligned every 500 years, and are grouped within 30 degrees every 1 to 3 alignments.
@askmenow
One calculation of alignments within around thirty degrees (about as close as they can get) shows that the last such alignment was in 561 BC, and the next will be in 2854. All nine planets are somewhat aligned every 500 years, and are grouped within 30 degrees every 1 to 3 alignments.
@askmenow
Why is a dog's nose wet?
Wet Nose, Cool Body. Moist noses are also one of the ways that canines can regulate body temperature and cool down. “Dogs don't have normal sweat glands, like people,” says Dr. King, “so they secrete sweat from the pads of their feet and their noses.”
@askmenow
Wet Nose, Cool Body. Moist noses are also one of the ways that canines can regulate body temperature and cool down. “Dogs don't have normal sweat glands, like people,” says Dr. King, “so they secrete sweat from the pads of their feet and their noses.”
@askmenow
What is the temperature of dry ice?
Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly into carbon dioxide gas rather than a liquid.
@askmenow
Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly into carbon dioxide gas rather than a liquid.
@askmenow
What countries border the Black Sea?
The Black Sea is an inland sea located between far-southeastern Europe and the far-western edges of the continent of Asia and the country of Turkey. It's bordered by Turkey, and by the countries of Bulgaria, Romania, Ukraine, Russia and Georgia.
@askmenow
The Black Sea is an inland sea located between far-southeastern Europe and the far-western edges of the continent of Asia and the country of Turkey. It's bordered by Turkey, and by the countries of Bulgaria, Romania, Ukraine, Russia and Georgia.
@askmenow
What percentage of the earth's water is frozen?
Of the three percent of the water that is not in the ocean, about 69 percent is locked up in glaciers and icecaps. Ninety percent of that frozen water is in Antarctica and about nine percent covers Greenland. Of the remaining freshwater, 30 percent of it is groundwater, captured below our feet.
@askmenow
Of the three percent of the water that is not in the ocean, about 69 percent is locked up in glaciers and icecaps. Ninety percent of that frozen water is in Antarctica and about nine percent covers Greenland. Of the remaining freshwater, 30 percent of it is groundwater, captured below our feet.
@askmenow
Why does the moon control the tides?
The tides are due to the gravitational pull of the Moon and the Sun on the Earth. Because the gravitational force decreases as the distance squared, the part of the Earth that is closer to the Moon or the Sun is pulled a little extra and a bulge is created.
@askmenow
The tides are due to the gravitational pull of the Moon and the Sun on the Earth. Because the gravitational force decreases as the distance squared, the part of the Earth that is closer to the Moon or the Sun is pulled a little extra and a bulge is created.
@askmenow