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HACTEHA [7]
3 years ago
7

In the Earth's mantle, heat is transferred in large convection currents. Within these currents,

Physics
2 answers:
chubhunter [2.5K]3 years ago
7 0
The answer is B. The hotter rock is less dense so rises. The cooler rock is more dense so sinks.
sertanlavr [38]3 years ago
4 0

B.) Hotter rock rises cooler rock sinks

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A car is 200 m from a stop sign and traveling toward the sign at 40.0 m/s. At this time, the driver suddenly realizes that she m
victus00 [196]

Answer:

The acceleration of the car will be a=9600m/sec^

Explanation:

We have given that distance from stop sign s = 200 m

Time t = 0.2 sec

We have to find the constant acceleration

Now from second equation of motion s=ut+\frac{1}{2}at^2

200=40\times 0.2+\frac{1}{2}\times a\times 0.2^2

a=9600m/sec^

So the acceleration of the car will be a=9600m/sec^

6 0
3 years ago
Suppose that instead of a long straight wire, a shortstraight wire was used. The distance from the wire to thepoint that the mag
vichka [17]

Answer:

Thus, if field were sampled at same distance, the field due to short wire is greater than field due to long wire.

Explanation:

The magnetic field, B of long straight wire can be obtained by applying ampere's law

B= \frac{\mu_0 I}{2\pi r}

I is here current, and r's the distance from the wire to the field of measurement.

The magnetic field is obviously directly proportional to the current wire. From this expression.

As the resistance of the long cable is proportional to the cable length, the short cable becomes less resilient than the long cable, so going through the short cable (where filled with the same material) is a bigger amount of currents. If the field is measured at the same time, the field is therefore larger than the long wire because of the short wire.

4 0
3 years ago
The amount of oxygen in the reactants is 4 atoms. In the products, the oxygen is distributed to water (H2O) and O2 gas. Which co
svp [43]

Answer:

2 in front of water and 1 in front of oxygen

Explanation:

3 0
2 years ago
Read 2 more answers
A water wave travels 36 meters in 15 seconds. What is the speed of the wave?
atroni [7]
2.4 meters per second

I hope this helps
5 0
3 years ago
Read 2 more answers
What is the Kinetic Energy of a 1200 kg object that is moving with a speed of 24 m/s
SVEN [57.7K]

Kinetic Energy = 1/2mv^2

m= 1200kg

v= 24 m/s

KE = 1/2 (1200kg)(24m/s)^2 = 345,600 N

8 0
3 years ago
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