How do the speeds v0, v1, and v2 (at times t0, t1, and t2) compare?a: v0 = v1 = v2 > 0
b: v0 = v2 > v1 = 0
c: v0 = v2 > v1 > 0
d: v0 > v1 > v2 > 0
e: v0 > v2 > v1 = 0

Answers

Answer 1

Answer:

The correctanswer between all the choices given is the third choice or letter C. I amhoping that this answer has satisfied your query and it will be able to helpyou in your endeavor, and if you would like, feel free to ask another question.

Answer 2

Answer:

Answer: option c: v₀ = v₂ > v₁ > 0

Explanation:

1) Velocity is the rate of change of the position with time. Therefore, in a graph of position vs time, the velocity is the slope of the path that describes the motion.

2) In this case you are requested to compare the speeds, i.e. just the magnitudes of the velocities. You can perform that by comparing the slopes in the three positions (x₀, y₀), (x₁, y₁), and (x₂, y₂).

3) Regarding v₁, since it corresponds to the peak of the curve (x₁.y₁), the vertical component of the velocity is zero (the horizontal component is constant, since there is not any horizontal force acting), so at this point the speed reaches its minimum value, then v₁ > 0, and v₁ is less than any other speed.

4) Regarding v₀ and v₂, at (x₀, y₀) and (x₂, y₂), note that those are points at the same distance from the axis of symmetry of the curve (assuming it is perfect parabola, which is what the graph intends to show).

That means that the velocities at those points are equal in magnitude but opposite in signs. Since, you are asked about the speed, which is magnitude, you conclude v₀ = v₂.

In conclusion v₀ = v₂ > v₁ > 0, which is the option c.

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The major contribution of the French philosopher Rene Descartes was in the realm ofa. physics.
b. chemistry.
c. astronomy.
d. epistemology.

Answers

The correct answer (d.) epistemology. The major contribution of the French philosopher Rene Descartes was in the realm of epistemology. Epistemology is the theory of knowledge, including methods, validity, and its scope. It could also be concluded to separate justified fact from an opinion.

The answer is epistemology. So d epistemology.

What is the length of an aluminum rod at 65°C if its length at 15°C is 1.2 meters?

Answers

Answer:

The new length is 1.20138 m

Explanation:

1- We get the increase in length:

The old length = 1.2 m

The coefficient of expansion of of aluminum is 23 * 10⁻⁶ /K.

The old temperature is 15°C.

The new temperature is 65°C

The increase in length= old length * coefficient of expansion *change in temperature

The increase in length = 1.2 * 23 * 10⁻⁶ * (65-15)

The increase in length = 0.00138 m

2- getting the new length:

new length = old length + increase in length

new length = 1.2 + 0.00138

new length = 1.20138 m

Hope this helps :)

1.201386 meters at 65 degrees C.
Will be your answer!

Hope I Helped!

Ruff, the 50 cm tall Labrador Retriever stands 3 m from a plane mirror and looks at his image. What is Ruff’s image position and height?

Answers

Since the mirror is plane, the image will be formed behind the mirror. The distance will be the same as that of the distance of the object from the mirror and the height will just be the same.
So, Ruff's image will be 3 m behind the mirror and 50 cm tall.

A high pressure center is generally characterized by

Answers

A high pressure center is generally characterized by cool, dry weather. The movement is cause by the addition of forces due to gravity because their higher pressure compresses the column of air near the center of the area nto greater density and so greater weight compared to lower pressure, lower density and lower weight of the air outside the center.

By connecting two identical storage batteries together in series ("+" to "-" to "+" to "-"), and placing them in a circuit, the combination will yield:a. zero volts.
b. twice the voltage and the same current will flow through each.
c. the same voltage and different current will flow through each.
d. twice the voltage and different currents will flwo through each.

Answers

Answer: option B

Explanation: each cell is suppose to have an emf and an internal resistance.

Let E1 be the emf of the first battery and E2 be the emf of the second battery.

Et is the total emf.

Going by the connection described above, it is a series arrangement.

Hence the total emf is calculated as sum of individual emf

Et = E1 + E2

But each cell are identical, hence E1 = E2 = E

Et = E + E = 2E.

Hence the total voltage is twice the voltage.

Since the connection is a series arrangement, the current passing through each cell is the same.

These points have made option B the correct answer.

Answer:

b) Twice the voltage and the same current

Explanation:

The two batteries are identical, and are connected in series. When elements in a circuit are connected in series, the same current flow through them but the voltage drops are additive.

Since the two batteries are identical, the possess the same voltage of magnitude V.

Therefore, the total voltage, $V_(total) = V + (V)\n$