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3 years ago

Is mirage a result of reflection or refraction?

Physics

2 answers:

nata0808 [166]3 years ago

5 0

I believe it isa refraction. hope this helps

Dmitry [639]3 years ago

4 0

Refraction. Light curves through warm, low-density air near the ground, where it travels faster.

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For a railgun, determine the current required to accelerate a 1000kg space vehicle to earths escape velocity on 10km of track wi

Troyanec [42]

Answer:

the current is 15.68 × $10^{5}$ A

Explanation:

mass = 1000 kg

magnetic fied = 2T

rail separation = 2m

escape velocity is 11.2km/s = 11.2 × $10^{3}$ m/s

distance = 10 km = $10^{4}$ m

to find out

determine the current

solution

we know force F = I×L×B

here I is current and L is rail separation and B is magnetic field

so F = I ×2×2 = 4 I

acceleration is a = $\frac{F}{mass}$

a = $\frac{4I}{1000}$ m/s²

so equation of motion

v²-u² = 2 a S

here u is initial velocity and S is distance and a is acceleration and v is final velocity

11.2 × $10^{3}$ - 0 = 2× $\frac{4I}{1000}$ × $10^{4}$

solve we get I

I = 15.68 × $10^{5}$ A

so the current is 15.68 × $10^{5}$ A

4 0

3 years ago

El sonido es una onda que?

Lina20 [59]

Answer:

Ondas y sonido. Una onda es una perturbación que avanza o que se propaga en un medio material o incluso en el vacío. ... El sonido es un tipo de onda mecánica que se propaga únicamente en presencia de un medio material.

Explanation:

3 0

3 years ago

PLSS HELP ASAP

Feliz [49]

40 seconds I’m pretty sure sorry if I’m wrong

6 0

3 years ago

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Is parenting nature or nurture

xxTIMURxx [149]

Parenting is nurture hope this helps!

5 0

3 years ago

Read 2 more answers

a 540 kg satellite moves through deep space with a speed of 27m/s. a booster rocket on the satellite fir 1.4 s, giving the force

sladkih [1.3K]

Answer:

Force = 1544.4N

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

$Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}$

$a = \frac{v - u}{t}$

Where;

a is acceleration measured in $ms^{-2}$

v and u is final and initial velocity respectively, measured in $ms^{-1}$

t is time measured in seconds.

Given the following data;

Mass, m = 540kg

Initial velocity, u = 27m/s

Final velocity, v = 31m/s

Time, t = 1.4 secs

To find the acceleration:

$a = \frac{31 - 27}{1.4}$

$a = \frac{4}{1.4}$

Acceleration, a = 2.86m/s²

Now to find the Force;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

$F = ma$

Where;

F represents force measured in Newton.

m represents the mass of an object measured in kilograms.

a represents acceleration measured in meter per seconds square.

Substituting into the equation, we have;

$F = 540*2.86$

Force = 1544.4N

Therefore, the force given by the booster rocket to the satellite is 1544.4 Newton.

6 0

3 years ago