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How was the compound microscope invented?
Zacharias Janssen and his son Johannes (Hans), spectacle makers in Holland, are usually credited with inventing the first compound microscope in about 1590. (Hans Lippershey, a spectacle maker in the same city, Middelburg, Netherlands, also claimed credit for the invention but was perhaps more instrumental in the creation of the telescope.) It was said that the Zacharias Janssen was experimenting with ways to improve spectacles for people who needed greater magnification to improve eyesight, but nothing more specific than simply experimenting with multiple lenses can be associated with how he invented the compound microscope. It is worth noting that at the same time experimentation by other spectacle makers and lens makers was leading to the discovery of the telescope, another optical instrument of two lenses. Two decades later, Galileo Galilei built a compound microscope and changed the lens design lens (convex and concave lens).
What invention allowed sailors do plot their positions at sea by looking at the stars?
The SEXTANT. This instrument will give the latitude of a ship. However, because of solar movements a CLOCK(Time piece) is needed to determine the longitude(meridian). So the two inventions are ; - The Sextant, and the Clock .
Why is oxygen needed by rockets and how does it get it?
The first part is simple, you need three things for a fire: Heat fuel Oxygen You get liquid oxygen that is mixed in with the just fuel before it ignites.
How much fuel needed to get to the moon?
how much fuel is needed to get to the moon in a rocket
Why was space-shuttle Challenger sent into space?
Nasa needed more orbiters. This was the second shuttle built and was the first that was used for testing then converted to space flight. It was send into space for the same purpose as Challenger before it and the ones after it.
A machine called the cotton gin was invented in 1793. It could process cotton much faster than before. Because of this invention the southern plantation owners?
needed more slaves to pick cotton.
What equipment is needed to see micro organisms?
Microscope is the basic tool. Some other equipments may be needed for the preparation.
What caused an increase in slavery in the US?
The invention of the cotton gin. More cotton, meant more people needed to pick, process the cotton. Thus, more slaves were needed.
How was the invention in the 1940s?
Invention spurred by items needed in war, was at a peak.
Where can one find information on how to patent an invention?
If one wants to find out how to patent an invention then it worth looking at all the information provide by the Patents Office on their website. They do step by step guides to the patenting process and provide the forms that are needed online.
Why was the steamboat such an important invention?
People needed transportation very quickly. Robert Folten was the inventor of the invention.
Why did slavery increase in the southern colonies?
Slavery increased in the southern colonies due to the labor-intensive nature of cash crops like tobacco, rice, and indigo. Plantation owners relied on enslaved laborers to cultivate and harvest these crops profitably, leading to a higher demand for slaves in the region. Economic incentives and a desire for cheap labor fueled the growth of slavery in the southern colonies.
What is needed to see the smallest animal?
well a microscope or your eye
What is a sentence for unicelluar?
A microscope is needed to see unicellular organisms.
What was needed for computers to become personal computers?
The invention of the microprocessor
Would A virologist would likely be able to see viral particles with a light microscope?
No, an electron microscope is needed to see a virus.
Is a microscope needed to see all kinds of bacteria?
i have no idea - sorry.
