3 years ago

Recall: earth applies _____________ on Earth or equivalently

Physics

1 answer:

Olin [163]3 years ago

4 0

Answer:

gravitational attraction

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A krypton laser produces a cylindrical red laser beam 2.40 mm in diameter with 1.70 W of power. What is the light intensity 1.76

marta [7]

Answer:

$I=3.75\times 10^5 W/m^2$

Explanation:

Given that

Diameter of laser beam d= 2.4 mm

Radius of laser beam r= 1.2 mm

Power P =1.7 W

We know that intensity(I) of laser beam given as follows

$I=\dfrac{P}{\pi r^2}$

Now by putting the values

$I=\dfrac{P}{\pi r^2}$

$I=\dfrac{1.7}{\pi \times 0.0012^2}$

$I=3.75\times 10^5 W/m^2$

So the intensity at 1.76 m away from laser

$I=3.75\times 10^5 W/m^2$

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3 years ago

Give three practical uses of electromagnets

PtichkaEL [24]

Three practical uses of electromagnets would be
Light. The waves
Electric locks. The bolts that are used by the
coils
Cranes. The electric ones that are found in
scraps
Cars computers washing machines all use
Electromagnets . Even CD players DVDs
Players

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4 years ago

If the same quantity of heat is added to both a 2-liter and a 4-liter container of water, the temperature change for water in th

VikaD [51]

Answer:

brainly.com/question/10966794

Explanation:

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3 years ago

B. Using the equation above, solve for t when vy = 0.0 m/s, vy(initial) = 57.45 m/s, and

tekilochka [14]

Answer:

-5.86secs

Explanation:

Using the equation of motion;

vy (final) = vy(initial) + gt

Substitute

0.0 = 57.45 + 9.81t

-57.45 = 9.81t

t = -57.45/9.81

t = -5.86secs

Hence the value of t is -5.86secs

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3 years ago

From the three lines in our Displacement vs Time graph, which line represents the highest velocity?

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Answer:

line 3.

Explanation:

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