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3 years ago

Help Please!

Physics

1 answer:

erma4kov [3.2K]3 years ago

8 0

Answer: Subtractive colors absorb OR subtract some lights causing it to reflect, and creating white.

Explanation:

Subtractive colors are created by completely or partially absorbing (or subtracting) some light wavelengths and reflecting others.

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Once again we have a skier on an inclined plane. The skier has mass M and starts from rest. Her speed at the bottom of the slope

mars1129 [50]

Answer:

v = 31.3 m / s

Explanation:

The law of the conservation of stable energy that if there are no frictional forces mechanical energy is conserved throughout the point.

Let's look for mechanical energy at two points, the highest where the body is at rest and the lowest where at the bottom of the plane

Highest point

Em₀ = U = m g y

Lowest point

$Em_{f}$ = K = ½ m v²

As there is no friction, mechanical energy is conserved

Em₀ = $Em_{f}$

m g y = ½ m v²

v = √ 2 g y

Where we can use trigonometry to find and

sin 30 = y / L

y = L sin 30

Let's replace

v = RA (2 g L sin 30)

Let's calculate

v = RA (2 9.8 100.0 sin30)

v = 31.3 m / s

4 0

3 years ago

A playground merry-go-round of radius r = 2.00 m has a moment of inertia = 250 ⋅ , and is rotating at 10.0 rev/min about a frict

bagirrra123 [75]

Answer:

$330kgm^2$

Explanation:

We are given that

Radius,r=2 m

Moment of inertia,I=250 $kgm^2$

Angular velocity, $\omega_1=10 rev/min$

Mass of child,m=20 kg

We have to find the new moment of inertia of the merry go round.

New moment of inertia , $I'=mr^2+I$

Using the formula

$I'=20(2)^2+250$

$I'=80+250=330kgm^2$

Hence, the new moment of inertia of the merry -go-round= $330kgm^2$

8 0

3 years ago

Which statement best describes what happens at the site of a divide?

lilavasa [31]

Answer:

C. Streams on each side of the divide flow in opposite directions.

Explanation:

Just took the assessment on edgenuit.

7 0

3 years ago

Read 2 more answers

Positive Charge is distributed along the entire x axis with a uniform density 12 nC/m. A proton is placed at a position of 1.00

lions [1.4K]

Answer:

b. $\Delta KE = 390 eV$

Explanation:

As we know that the electric field due to infinite line charge is given as

$E =\frac{\lambda}{2\pi \epsilon_0 r}$

here we can find potential difference between two points using the relation

$\Delta V = \int E.dr$

now we have

$\Delta V = \int(\frac{\lambda}{2\pi \epsilon_0 r}).dr$

now we have

$\Delta V = \frac{\lambda}{2\pi \epsilon_0}ln(\frac{r_2}{r_1})$

now plug in all values in it

$\Delta V = \frac{12\times 10^{-9}}{2\pi \epsilon_0}ln(\frac{1+5}{1})$

$\Delta V = 216ln6 = 387 V$

now we know by energy conservation

$\Delta KE = q\Delta V$

$\Delta KE = (e)(387V) = 387 eV$

3 0

3 years ago

Find the mass of the car.

SpyIntel [72]

$\huge\boxed{770.8\overline{3}\ \text{kg}}$

We know that force equals mass times acceleration, so substitute in the known values and solve.

$\begin{aligned}F&=ma\\1850&=m*2.4\\1850\div2.4&=m*2.4\div2.4\\\boxed{770.8\overline{3}}&=m\end{aligned}$

4 0

3 years ago