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3 years ago

I’ll give brainliest and 10 points

Physics

1 answer:

leonid [27]3 years ago

7 0

Answer:

what's these its D okkkk

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Which statement correctly describes how thermal energy tends to spontaneously flow

Nitella [24]

#A for plato users, i took the test and got 100!!

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3 years ago

The layer of leaves that blocks most of the sunlight from reaching the ground in the rain forest is called the _____.

love history [14]

The answer should be <span>canopy.</span>

4 0

3 years ago

Read 2 more answers

A sample of gas initially has a volume of 859 ml at 565 k and 2.20 atm. What pressure will the sample have if the volume changes

Brut [27]

Answer:

10.2 atm

Explanation:

Use ideal gas law:

PV = nRT

Initial number of moles is:

(2.20 atm) (0.859 L) = n (0.0821 atm L / mol / K) (565 K)

n = 0.0407 mol

At the new volume and temperature, the pressure is:

P (0.268 L) = (0.0407 mol) (0.0821 atm L / mol / K) (815 K)

P = 10.2 atm

8 0

3 years ago

A certain airplane has a speed of 290.0 km/h and is diving at an angle of 0 : 30.0" below the horizontal when the pilot releases

prisoha [69]

Answer:

10.03 s is the time the decoy is in the air

Explanation:

From the information given we know:

$\theta_{0}=-30$ because is measured clockwise from horizontal.

The initial speed of the decoy is the plane's speed at the moment of release $v_{0}=290 \:\frac{km}{h}$

We will need to work in meters and m/s, so $290 \:\frac{km}{h} \cdot \frac{1000 \:m}{km} \cdot \frac{1\:h}{3600\:s} = 80.56 \:\frac{m}{s}$

The horizontal motion of a projectile is given by:

$x-x_{0}=v_{0x}\cdot t$

because $v_{0x}=v_0cos(\theta_{0})$ , this becomes

$x-x_{0}=(v_0cos(\theta_{0}))\cdot t$

We have that $\Delta x= 700\:m$ , solving for <em>t, </em>we have

$t=\frac{\Delta x}{v_{0}cos\theta_{0}} \\t=\frac{700 \:m}{(80.56 \:\frac{m}{s} )\cdot cos(-30)} \\t= 10.03 \:s$

5 0

3 years ago

When a lens refracts different wavelengths at different angles, causing the light in the lens that passes through the edges to b

kondaur [170]

The technical name was kinda given in the question, and I'm guessing that's what they want: Dispersion. It refers to the phenomenon of different frequencies traveling at different speeds through a medium. This is due to the fact that the relative electric permittivity is a complex quantity that is a function of frequency. The relative electric permittivity, $\epsilon_{r}$ , is related to the speed of the wave in the medium by the relation:
$c' = \frac{c}{ \sqrt{ \epsilon_{r} } }$
Since this speed is a function of permittivity, and permittivity is a function of frequency, speed is a function of frequency.
Probably more info than you needed....

5 0

3 years ago