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3 years ago

HEY CAN ANYONE PLS ANSWER DIS RQ!!!!

Physics

1 answer:

Bezzdna [24]3 years ago

8 0

Answer:

Negative

Explanation:

If you have to move the decimal point to the right to get the original number, the exponent will be a positive number, if you have to move the decimal point to the left to get the original number, the exponent will be a negative number.

Hope this helped!

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In what state of matter can conduction occur.

son4ous [18]

Answer: Conduction occurs more readily in solids and liquids, where the particles are closer to together, than in gases, where particles are further apart.

7 0

3 years ago

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Lester plays middle linebacker for dices football team. During one play, he made the following movements. First, he back-pedaled

NikAS [45]

Answer:

Explanation:

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4 0

2 years ago

How much time will it take a 75w ceiling fan to convert 1500j of electrical energy into mechanical and thermal energy?

-Dominant- [34]

20h

Explanation:

Given parameters:

Electrical power = 75W

Electrical energy = 1500J

Unknown:

Time taken = ?

Solution:

Electrical power is the amount of voltage that drives current.

P = IV

Electrical energy is the voltage that drives a current per unit of time

E = IVt

E = Pt

Since time is the unknown, we can make it subject of the formula;

t = $\frac{E }{P}$ = $\frac{1500}{75}$ = 20h

Learn more:

Invention of electrical power brainly.com/question/13146914

#learnwithBrainly

4 0

4 years ago

Since force is dp/dt, the force due to radiation pressure reflected off of a solar sail can be calculated as 2 times the radiati

QveST [7]

Answer:

8.67×10⁻⁶ N/m²

Explanation:

p = Momentum of a photon

E = Energy of a photon

c = Speed of light

I = Intensity of light

Force = dp/dt

$p=\frac{E}{c}$

$\\\Rightarrow F=\frac{\frac{dE}{dt}}{c}$

As given in question

$F=2\frac{\frac{dE}{dt}}{c}$

Now F/A = Pressure

$P=\frac{2I}{c}\\\Rightarrow P=\frac{2\times 1300}{3\times 10^{8}}\\\Rightarrow P=8.67\times 10^{-6}\ N/m^2$

∴ Magnitude of the pressure on the sail is 8.67×10⁻⁶ N/m²

4 0

4 years ago

1-D catch-up: Two cars move with constant velocities. At t = 0, a blue car is at xBo = 20 m. After t = 4s in the blue car time f

OlgaM077 [116]

Answer:

5.71 m/s ;

20 m/s

Explanation:

Blue car:

At time, t = 0 ; Initial position = 20 m

Final position, = 60m after 4 seconds

The velocity = change in distance / change in time.

Velocity of blue = (60 - 20)m ÷ ((4 + 3) - 0),

Velocity of blue car = 40 / 7

= 5.71 m/s

Red car:

Initial Position = 0 ; final Position = 60

Time taken = 3 seconds

Velocity of Red car = (60 - 0)m ÷ 3

Velocity of Red car = 60 / 3

= 20 m/s

6 0

3 years ago