Which statement is true of magnets?a. Elecromagnets are generally weaker than permanent magnets.
b. Earth is an electromagnet.
c. A magnet always has a north pol, and may or may not also have a south pole.
d. Permanent magnets can be turned off.
Answers
The answer would be B. Earth is an electromagnet.
The Earth is a giant electromagnet. It's electromagnetic field is generated from the currents of electricity coming from molten metal flowing in the outer core of our Earth. The heat from the inner core causes convection and that is how electric current flows within Earth.
Earth us an electromagnet (apex)
Related Questions
What are some examples of convection in our daily lives
an object at rest starts accelerating if it travels 30 meters to end up going 10 m/s what was it’s acceleration
Is orange juice in an orange potential energy or kinetic energy?
A car is strapped to a rocket (combined mass = 661 kg), and its kinetic energy is 66,120 J.At this time, the rocket runs out of fuel and turns off, and the car deploys a parachute to slow down, and the parachute performs 36,733 J of work on the car.What is the final speed of the car after this work is performed?
at the north and south poles
B.
next to the south pole
C.
in the middle of the magnet
D.
between the north and south poles
Answers
Answers
The ball only accelerates during the brief time that the club is in contact
with it. After it leaves the club face, it takes off at a constant speed.
If it accelerates at 20 m/s² during the hit, then
Force = (mass) x (acceleration) = (0.2kg) x (20 m/s²) = 4 newtons .
F = 0.2 * 20 = 4 Newtons
Answers
Answer:
12 m/s
Explanation:
Speed can be found using the following formula.
where s is speed, d is distance traveled and t is the time.
We know that Cynthia sprinted 60 meters in 5 seconds. Therefore, the distance is 60 meters and the time is 5 seconds.
d=60
t=5
Substitute these values into the formula.
Divide
Add appropriate units. For this problem, the appropriate units would be meters per second, or m/s.
Cynthia's speed is 12 meters per second.
Answers
In empty space vacuum, where the speed of light is fastest, n=1 exactly. In any material medium, 'n' is bigger than 1, and the bigger it is, the slower the speed of light in that medium.
The amount of refraction depends on the CHANGE of speed at the boundary. So when light goes from air or vacuum into, say, the 2.34, there's a big change of speed, and more refraction. But from space or air into 1.58, less change of speed, and less refraction.
If the light is going from a block of 1.58 into a block of 1.72, then not much refraction, because not much CHANGE in speed.
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Answers
The kind of weather would an occluded front likely bring is much precipitation. The correct option is (b).
An occluded front happens when a warm front is passed by a cold front, which causes the cold air mass to elevate the warm air mass off the ground. Cloud formation and precipitation may result from this lifting of warm air.
When heated air is hoisted into the atmosphere and cooled, it condenses to form clouds. Ultimately results in rain or different types of precipitation.
Therefore, an occluded front is feasible to produce a good amount of precipitation. Depending on the atmospheric instability, cloudy skies, rain or showers, and occasionally thunderstorms can be found along an occluded front.
Hence, the kind of weather would an occluded front likely bring is much precipitation. The correct option is (b).
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