What state of matter is it that it starts at a liquid then loses energy during the change of state

Were the continents once joined together as a supercontinent? Give 3 pieces of evidence to support Alfred Wegeners Theory of Con

sattari [20]

Yes! Fossils, The outlines of the continents and geological features .

5 0

3 years ago

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An electric motor is traversed by 3.10²º electrons in 6 seconds. Determine the intensity of the current passing through the moto

Effectus [21]

Current is the amount of charged passed divided by elapsed time.

I = Q/Δt

I = current, Q = charge, Δt = elapsed time

We also know an electron has a charge of 1.6×10⁻¹⁹C, so let us find the total charge by multiplying this unit of charge by the total number of electrons:

Q = 1.6×10⁻¹⁹(3×10²⁰) = 48C

We also have Δt = 6s, so let's plug these values in to solve for I:

I = 48/6

I = 8A

4 0

3 years ago

Dissolved in many gasolines are cleaning agents and anti-knock additives. These cleaning agents and additives are an example of

Lesechka [4]

I think the answer is Solutes.

7 0

4 years ago

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A train is moving along a track with constant speed v1 relative to the ground. A person on the train holds a ball of mass m and

scoundrel [369]

Answer:

$(a)0.5m(2v1v2+v2^{2})\\(b)0.5m(v2^{2}-v1^{2})\\(c)0.5m(2v1v2+v2^{2})\\(d)0.5m(v2^{2}-v1^{2})$

Explanation:

velocity of ball in train reference = v2

velocity of ball in earth reference = v1+v2

(a)

Kinetic energy is given by $0.5mv^{2}$ where m and v are the mass and velocity of object respectively.

Change in kinetic energy is given by subtracting initial kinetic energy from the final kinetic energy. In this case

Initial kinetic energy= $0.5mv1^{2}$

Final kinetic energy= $0.5m (v1+v2)^{2}=0.5m(v1^{2}+2v1v2+v2^{2})$

Change in kinetic energy= $0.5m (v1+v2)^{2}-0.5mv1^{2}=0.5m((v1+v2)^{2})-v1^{2}=0.5m(2v1v2+v2^{2}$

(b)

Change in velocity in train reference will be

Initial kinetic energy= $0.5mv1^{2}$

Final kinetic energy= $0.5mv2^{2}$

Change in kinetic energy= $0.5m(v2^{2}-v1^{2})$

(c)

Work done, W = change in kinetic energy= $0.5m (v1+v2)^{2}-0.5mv1^{2}=0.5m((v1+v2)^{2})-v1^{2}=0.5m(2v1v2+v2^{2}$

(d)

Work done, W = change in kinetic energy= $0.5m(v2^{2}-v1^{2})$

4 0

3 years ago

Which shows the correct order of processes leading up to the formation of a main sequence star?

Nataly [62]

hi

Gases condense to form a nebula, gravity causes the nebula to collapse and spin, nuclear fusion occurs, and a protostar forms.

Gases condense to form a nebula, gravity causes the nebula to collapse and spin, nuclear fusion occurs, and a protostar forms.b. A protostar forms, nuclear fusion occurs, gases condense to form a nebula, and gravity causes the nebula to collapse and spin.

Gases condense to form a nebula, gravity causes the nebula to collapse and spin, nuclear fusion occurs, and a protostar forms.b. A protostar forms, nuclear fusion occurs, gases condense to form a nebula, and gravity causes the nebula to collapse and spin.c. Gases condense to form a nebula, gravity causes the nebula to collapse and spin, a protostar forms, and nuclear fusion occurs.

Gases condense to form a nebula, gravity causes the nebula to collapse and spin, nuclear fusion occurs, and a protostar forms.b. A protostar forms, nuclear fusion occurs, gases condense to form a nebula, and gravity causes the nebula to collapse and spin.c. Gases condense to form a nebula, gravity causes the nebula to collapse and spin, a protostar forms, and nuclear fusion occurs.d. A protostar forms, gases condense to form a nebula, gravity causes the nebula to collapse and spin, and nuclear fusion occurs.

4 0

2 years ago