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3 years ago

1. The experiment shown below is finished. What can you conclude from these results?

Physics

1 answer:

user100 [1]3 years ago

7 0

Answer:

C. Seed C germinates more with more water.

Explanation:

In this experiment, the seed (seed C) was subjected to certain conditions and the result is what has been presented for us to make an inference.

We observe the following from the information given us:

I. the same seeds were used for the experiment

II. the same heat medium of 24 °C was used for all the seeds

III. different daily amount of water was supplied the seeds - 90 ml, 50 ml and 10 ml

From the experiment, we have this result:

the seed that was watered with 10 ml daily did not sprout anything, the seed that was watered with 50 ml daily yielded 12 sprouts while the seed that was watered with 90 ml daily yielded 16 sprouts

When we consider the amount of water given the seed & the produce of the seed, it is safe to conclude that with increase in daily water, there is increase in the number of sprouts by the seed

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<u>Hence, C. Seed C germinates more with more water is the correct answer </u>

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10. How far does a transverse pulse travel in 1.23 ms on a string with a density of 5.47 × 10−3 kg/m under tension of 47.8 ?????

KATRIN_1 [288]

Answer: Tension = 47.8N, Δx = 11.5× $10^{-6}$ m.

Tension = 95.6N, Δx = 15.4× $10^{-5}$ m

Explanation: A speed of wave on a string under a tension force can be calculated as:

$|v| = \sqrt{\frac{F_{T}}{\mu} }$

$F_{T}$ is tension force (N)

μ is linear density (kg/m)

Determining velocity:

$|v| = \sqrt{\frac{47.8}{5.47.10^{-3}} }$

$|v| = \sqrt{0.00874 }$

$|v| =$ 0.0935 m/s

The displacement a pulse traveled in 1.23ms:

$\Delta x = |v|.t$

$\Delta x = 9.35.10^{-2}*1.23.10^{-3}$

Δx = 11.5× $10^{-6}$

With tension of 47.8N, a pulse will travel Δx = 11.5× $10^{-6}$ m.

Doubling Tension:

$|v| = \sqrt{\frac{2*47.8}{5.47.10^{-3}} }$

$|v| = \sqrt{2.0.00874 }$

$|v| = \sqrt{0.01568}$

|v| = 0.1252 m/s

Displacement for same time:

$\Delta x = |v|.t$

$\Delta x = 12.52.10^{-2}*1.23.10^{-3}$

$\Delta x =$ 15.4× $10^{-5}$

With doubled tension, it travels $\Delta x =$ 15.4× $10^{-5}$ m

4 0

3 years ago

Velocity is a vector quantity which has both magnitude and direction. Using complete sentences, describe the object’s velocity d

andreyandreev [35.5K]

Answer:

Explanation:

During a course of elliptical motion the direction of the body keeps changing however its magnitude may or may not remain constant.

During a curve path motion the velocity of the object is directed in a tangential direction to the curve.

During the motion on a curved path if the magnitude of a body remains constant then the body is said to have a constant speed which is a scalar quantity. Scalar quantities do not have direction.

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3 years ago

An object is moving with constant non-zero velocity. Which of thw following statements about it must be true

hram777 [196]

Answer:

The net force on the object is zero.

Explanation:

An object is moving with constant non-zero velocity. If velocity is constant, it means that the change in velocity is equal to 0. As a result, acceleration of the object is equal to 0. Net force is the product of mass and acceleration. Hence, the correct option is (d) "The net force on the object is zero".

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2 years ago

A potter's wheel is rotating around a vertical axis through its center at a frequency of 2.0 rev/s. The wheel can be considered

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Answer:

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