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3 years ago

Iron-rich minerals in rock pointed in one direction and then switched to the exact opposite direction. This supports what idea?

Physics

2 answers:

Luda [366]3 years ago

8 0

Earth's magnetic field goes through pole reversals

NISA [10]3 years ago

4 0

Iron rich minerals in rock pointed in one direction the switch to the exact opposite direction. I'd say that what supports this idea is that Earth's magnetic field goes through pole reversals.<span>
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A proton has a speed of 3.50 Ã 105 m/s when at a point where the potential is +100 V. Later, itâs at a point where the potential

ruslelena [56]

Answer:

(a). The change in the protons electric potential is 0.639 kV.

(b). The change in the potential energy of the proton is $1.022\times10^{-16}\ J$

(c). The work done on the proton is $-8\times10^{-18}\ J$ .

Explanation:

Given that,

Speed $v= 3.50\times10^{5}\ m/s$

Initial potential V=100 V

Final potential = 150 V

(a). We need to calculate the change in the protons electric potential

Potential energy of the proton is

$U=qV=eV$

Using conservation of energy

$K_{i}+U_{i}=K_{f}+U_{f}$

$\dfrac{1}{2}mv_{i}^2+eV_{i}=\dfrac{1}{2}mv_{f}^2+eV_{f}$

$]\dfrac{1}{2}mv_{i}^2-]\dfrac{1}{2}mv_{f}^2=e(V_{f}-V_{i})$

$\dfrac{1}{2}mv_{i}^2-]\dfrac{1}{2}mv_{f}^2=e\Delta V$

$\Delta V=\dfrac{m(v_{i}^2-v_{f}^2)}{2e}$

Put the value into the formula

$\Delta V=\dfrac{1.67\times10^{-27}(3.50\times10^{5}-0)^2}{2\times1.6\times10^{-19}}$

$\Delta V=639.2=0.639\ kV$

(b). We need to calculate the change in the potential energy of the proton

Using formula of potential energy

$\Delta U=q\Delta V$

Put the value into the formula

$\Delta U=1.6\times10^{-19}\times639.2$

$\Delta U=1.022\times10^{-16}\ J$

(c). We need to calculate the work done on the proton

Using formula of work done

$\Delta U=-W$

$W=q(V_{2}-V_{1})$

$W=-1.6\times10^{-19}(150-100)$

$W=-8\times10^{-18}\ J$

Hence, (a). The change in the protons electric potential is 0.639 kV.

(b). The change in the potential energy of the proton is $1.022\times10^{-16}\ J$

(c). The work done on the proton is $-8\times10^{-18}\ J$ .

5 0

3 years ago

Grades depend on doing the right things. A person should earn good grades for reading instructions, meeting deadlines, turning i

Leto [7]

maybe yes/maybe No.

Explanation:

cause if the person need a good grades he will going to grab all that he need to grab as a student and studies her lesson.

cause all person has their own reason why he did not do her activity or project because we have a different situations and life..

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3 years ago

PWEESE HELP <br> LOOK AT THE IMAGE BELOW

schepotkina [342]

Answer: 2 m/s is the answer

Explanation:

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3 years ago

Jupiter has a magnetic field that is a. much stronger than that of Earth and greatly extended. b. very strong and localized clos

irina [24]

Answer:

a. much stronger than that of Earth and greatly extended.

Explanation:

Jupiter is a gas giant. It mainly consists of hydrogen and helium and also may have rocky core. Jupiter has the fastest rotational period among the planets of the solar system. One day on Jupiter lasts for 11 hours. This rotation causes the hydrogen in the atmosphere to rotate at great speed.

The rotation of the hydrogen generates the magnetic field of Jupiter. It is almost 14 times greater than the Earth's magnetic field in terms of strength and the second largest in terms of distance after the sun.

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3 years ago

Two airplanes leave an airport at the same time.The velocity of the first airplane is 700 m/h at a heading of 31.3 the velocity

MArishka [77]

Here in order to find out the distance between two planes after 3 hours can be calculated by the concept of relative velocity

$v_{12} = v_1 - v_2$