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Aleks [24]
3 years ago
14

Now, perform the experiment. Using the straw, blow air onto the sand in pan 3. Then use the hair dryer to blow air on the sand i

n pan 4. Write down your observations about the sand in each pan.
Weathering, Erosion
Pleasssseee help mee
Physics
2 answers:
Fiesta28 [93]3 years ago
8 0
How can i help when we don’t see the experiment?
Zina [86]3 years ago
4 0
I do not know the exact question. But I can explain what weathering and erosion is to possibly help you.
Weathering- The process of wearing or being worn by long exposure to the atmosphere. (Usually rain and wind).
Erosion-The process of eroding or being eroded by wind, water, or other natural agents. (Such as acid rain over time slowly cutting into a rock and breaking it down into minerals).
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Which color of the visible light spectrum has the most energy?
Hitman42 [59]

Answer:

B

Explanation:

6 0
3 years ago
A screwdriver is used to pry the lid off a paint can. The resistance arm is 0.5 cm long and the effort arm is 20 cm long. What i
Lunna [17]

Answer:

40

Explanation:

Mechanical advantage = effort arm / load arm

MA = 20 cm / 0.5 cm

MA = 40

4 0
3 years ago
How is thermal energy transferred between two objects that are at different temperatures?
OLga [1]

Answer:

when you bring two objects of different temperatures together, energy will always be transferred from the hotter to the cooler object. The objects will exchange thermal energy, until thermal equilibrium is reached, until their temperatures are equal. We say that heat flows from the hotter to the cooler object.

6 0
4 years ago
Help me please!!!!!!!!!!!!!/ Science
Elan Coil [88]
I don't understand that I'm sorry what grade is that
5 0
3 years ago
A magnetic field is aligned perpendicular to the plane of a circular loop of wire with radius 5.0 cm and 20 turns. The magnetic
Mariana [72]

Answer:

V = 0.157(-36 e^{-3t} + 1.5)

t = 1.24 s

Part b)

EMF = 0.136(-36e^{-3t} + 1.5)

Explanation:

magnetic field due to external source is given as

B = 12 e^{-3t} + 1.5 t + 6

area of the loop is given as

A = \pi r^2

A = \pi(0.05)^2

A = 7.85 \times 10^{-3} m^2

Now we have

\phi = NBAcos0

\phi = (20)(12e^{-3t} + 1.5t + 6)(7.85 \times 10^{-3})

V = \frac{d\phi}{dt}

V = 0.157\frac{d}{dt}(12e^{-3t} + 1.5t + 6)

V = 0.157(-36 e^{-3t} + 1.5)

now we need to find the time at which voltage is 0.1 Volts so we have

0.1 V = 0.157(-36e^{-3t} + 1.5)

t = 1.24 s

Part b)

If magnetic field is inclined at an angle of 30 degree with the normal of the loop then

\phi = NBAcos30

now we know that induced EMF is given as

EMF = \frac{d\phi}{dt}

EMF = NAcos30\frac{dB}{dt}

EMF = (20)(7.85 \times 10^{-3})cos30(\frac{d}{dt}(12e^{-3t} + 1.5t + 6))

EMF = 0.136(-36e^{-3t} + 1.5)

7 0
3 years ago
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