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1 year ago

One student did an experiment with sand, rocks, pebbles, and water. The steps of the experiment are shown below.

1 answer:

3 0

The intended observation in this experiment is to check the flow of water through the cotton cloth when pouring the water through different material (sand, rocks and pebbles).
We will observe that the rate of water flow changes depending on which material it is flowing through.
The used materials in this experiment (sand, rocks and pebbles) are the same as those forming different layers of the earth.

Therefore, based on the above explanation, we can infer that the best answer is:
D. groundwater moves at different rates through different layers of the Earth

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An ice hockey puck is tied by a string to a stake in the ice. the puck is then swung in a circle. what force is producing the ce

Taya2010 [7]

In a circular motion scenario, the force that pulls the revolving object towards the centre is the force that produces the centripetal acceleration. So, in this case, the tension on the string is the force that pulls the puck towards the centre.

Therefore, it is the tension in the string that causes the centripetal acceleration of the puck

Hope I helped!! xx

8 0

1 year ago

Read 2 more answers

A punted football is observed to have velocity components vhorizontal = 15 m/s to the right and vvertical = 1.25 m/s directed do

enot [183]

Answer:

v₀ₓ = 15 m / s, $v_{oy}$ = 5.2 m / s

v = 15.87 m / s , θ = 19.1

Explanation:

This is a projectile launch problem. The horizontal speed that is constant throughout the entire path is worth 15 m / s, instead the vertical speed changes in value due to the acceleration of gravity, let's look for the initial vertical speed

Vy² = $v_{oy}$ ² - 2 g y

$v_{oy}$ ² = $v_{y}$ ² + 2 g y

$v_{oy}$ = √ ( $v_{y}$ ² + 2 gy

Let's calculate

$v_{oy}$ = √ (1.25² + 2 9.8 1.3)

$v_{oy}$ = √ (27.04)

$v_{oy}$ = 5.2 m / s

The initial speed can be calculated by the initial speed

v = √ v₀ₓ² + $v_{oy}$ ²

v = RA (15² + 5.2²)

v = 15.87 m / s

We look for the angle with trigonometry

tan θ = voy / vox

θ = tan⁻¹ I'm going / vox

θ = tan⁻¹ 5.2 / 15

θ = 19.1

The answer is

v₀ₓ = 15 m / s

$v_{oy}$ = 5.2 m / s

5 0

1 year ago

The charges for four ions are sodium (Na) +1, calcium (Ca) +2, fluorine (F) –1, and sulfur (S) –2. Which would be an ionic bond

Ludmilka [50]

The correct answer would be B. It is the compound Na2S that forms an ionic bond from the given ion above. From the choices, it is the only compound that exist and is available. Metals cannot react with another metal as well as nonmetal to nonmetal.

3 0

2 years ago

Read 2 more answers

A jetboat is drifting with a speed of 5.0\,\dfrac{\text m}{\text s}5.0 s m 5, point, 0, start fraction, start text, m, end tex

love history [14]

The question is incomplete. Here is the entire question.

A jetboat is drifting with a speed of 5.0m/s when the driver turns on the motor. The motor runs for 6.0s causing a constant leftward acceleration of magnitude 4.0m/s². What is the displacement of the boat over the 6.0 seconds time interval?

Answer: Δx = - 42m

Explanation: The jetboat is moving with an acceleration during the time interval, so it is a linear motion with constant acceleration.

For this "type" of motion, displacement (Δx) can be determined by:

$\Delta x = v_{i}.t + \frac{a}{2}.t^{2}$