Momentum = (mass) x (speed)
Momentum = (12,000 kg) x (40 m/s)
Momentum = (12,000 x 40) kg-m/s
<em>Momentum = 480,000 kg-m/s </em>
1433 km
Explanation:
Let g' = the gravitational field strength at an altitude h
We also know that g at the earth's surface is
Since g' = (2/3)g, we can write
Simplifying the above expression by cancelling out common factors, we get
Taking the square root of both sides, this becomes
Solving for h, we get
D: An electromagnet with 20 coils.
That is because the more coils of the wire, the stronger the electromagnet is.
Answer:
The vacuum tube was replaced with transistor.
Explanation:
- The invention of semiconductor was very useful in making solid state transistor that allowed the production of small yet faster, cheaper, and more trusted and reliable computers.
- These solid state transistor is so often used that, it nearly replaced all the use of transistor.
- This replacement took place after the invention of semiconductor in the year around 1940.
- Vacuum tubes also known as thermionic tubes are not used anymore in computers and electronics.
The hydrometer displays the density of the liquid you stick it in, COMPARED TO WATER.
If you stick it in pure water, it should read 1.00 . This is a good way to check your hydrometer and see whether it's reading correctly ("calibrated").
