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shtirl [24]
4 years ago
11

A student visits the beach and wants to explore how landforms, such as sand dunes, are the result of changes caused by wind. wha

t is the best tool to use while observing these changes?
A Graduated cylinder
B Hand lens
C Camera
D Microscope
Physics
2 answers:
ella [17]4 years ago
7 0
Camera because it would be helpful to photograph the dunes at different times and compare the differences resulting from wind.
posledela4 years ago
3 0
C Camera. I think this because you can make timelapses with cameras which makes it easy to see.
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A car speeds up from 3 m/s to 10 m/s in 8 s. How far does the car travel while doing this? 2. A
yarga [219]

Initial velocity=u=3m/s

Final velocity=v=10m/s

Time=t=8s

\boxed{\sf Acceleration=\dfrac{v-u}{t}}

\\ \sf\longmapsto Acceleration=\dfrac{10-3}{8}

\\ \sf\longmapsto Acceleration=\dfrac{7}{8}

\\ \sf\longmapsto Acceleration=0.8m/s^2

  • Distance =s

Using second equation of motion

\\ \sf\longmapsto s=ut+\dfrac{1}{2}at^2

\\ \sf\longmapsto s=3(8)+\dfrac{1}{2}(0.8)(8)^2

\\ \sf\longmapsto s=24+0.4(64)

\\ \sf\longmapsto s=24+25.6

\\ \sf\longmapsto s=49.6m

5 0
3 years ago
Mutations _____.
NeTakaya

Answer:

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8 0
3 years ago
Liquid water at 120 kPa enters a 7-kW pump where its pressure is raised to 5.6 MPa. If the elevation difference between the exit
ziro4ka [17]

Answer:

The answer is given below

Explanation:

Things provided in the statement:

Pressure <em>P1</em> = 120 kPa and <em>P2</em> = 5.6 MP or 5600 kPa

Power, <em>W</em> = 7 kW

Elevation difference = ∆z = 10 m

Mass of flow = m˙

So potential energy changes may be significant

Specific volume of water V= 0.001 m³/kg

Now putting the values in the formula

Power, <em>W </em>= m˙  x V (<em>P1 - P2</em>) + m˙ x g x ∆z

             7 = m˙  x 0.001 (5600 - 120 ) + m˙ x 9.8 x 10 x (1 kJ/kg/ 1000 m^2/s^2)

             7 = m˙ x 5.48 + m˙ x 0.098

             7 = m ˙x 5.38

            m˙ = 7/5.38

          So mass flow m˙  =  1.301 kJ/s

8 0
3 years ago
When the rate of motion is the same direction the speed will decrease.<br><br> True<br> False
slega [8]
A)true is the answer
6 0
3 years ago
A parallel-plate capacitor is charged by a 14.0 V battery, then the battery is removed. You may want to review (Pages 692 - 695)
Anika [276]

Answer:

Potential Difference = 14 V

Explanation:

We are told that when the capacitor plates are charged to a certain voltage, then we have;

ΔV = 14 volts

Now, the battery is disconnected, so here we have the potential difference between the plates to be given by the formula;

ΔV = Q/C

Now, the charge is conserved on the plates and the capacitance is constant, therefore in this case, the potential difference will remain the same.

Thus;

Potential Difference = 14 V

6 0
3 years ago
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