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scoundrel [369]

2 years ago

15

In which medium would sound travel the fastest? a)across a room b)in a swimming pool c)through outer space d)through a railroad

track

1 answer:

lora16 [44]2 years ago

7 0

d)through a railroad track

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All matter is made up of subatomic particles that contain atoms.TrueFalse

antiseptic1488 [7]

All matter is made up of subatomic particles that contain atoms. This is false statement.

Everything in the universe is made of matter, and so, everything in the universe is made of atoms. An atom itself is made up of three tiny kinds of particles called subatomic particles: <u>protons, neutrons, and electrons</u>.

All matter is made up of substances called elements, which have specific chemical and physical properties and cannot be broken down into other substances through ordinary chemical reactions.

Matter is anything which have mass and occupy some volume.

On earth, solid, liquid, and gas are the most common states of matter. Not only is water the most common substance on earth, but it is also the only substance that commonly appears as a solid, a liquid, and a gas within the normal range of earth's temperatures.

Learn more about matter here:- brainly.com/question/16982523

#SPJ9

3 0

10 months ago

An airplane flying at an altitude of 6 miles passes directly over a radar antenna. When the airplane is 10 miles away (s = 10),

Novosadov [1.4K]

Answer:

Explanation:

Given

altitude of the Plane $h=6\ miles$

When Airplane is $s=10\ miles$ away

Distance is changing at the rate of $\frac{\mathrm{d} s}{\mathrm{d} t}=290\ mph$

From diagram we can write as

$h^2+x^2=s^2$

differentiate above equation w.r.t time

$2h\frac{\mathrm{d} h}{\mathrm{d} t}+2x\frac{\mathrm{d} x}{\mathrm{d} t}=2s\frac{\mathrm{d} s}{\mathrm{d} t}$

as altitude is not changing therefore $\frac{\mathrm{d} h}{\mathrm{d} t}=0$

$0+x\frac{\mathrm{d} x}{\mathrm{d} t}=s\frac{\mathrm{d} s}{\mathrm{d} t}$

at $s=10\ miles\ and\ h=6\ miles$

substitute the value we get $x=\sqrt{10^2-6^2}=8\ miles$

$8\times \frac{\mathrm{d} x}{\mathrm{d} t}=10\times 290$

$\frac{\mathrm{d} x}{\mathrm{d} t}=362.5\ mph$

5 0

3 years ago

The climate of an area is based on A) Rivers and lakes B) natural resources. C) mountain and valleys. D) Precipitation and tempe

LenaWriter [7]

It is D as it is the only answer referring to weather and climate.

3 0

3 years ago

. What will happen if there is an oil spill in the Arctic Ocean based on the statements above? A) The Atlantic and Southern Ocea

Daniel [21]

Answer: a

Explanation:

8 0

3 years ago

Read 2 more answers

A small, 0.100 kg cart is moving at 1.20 m/s on a frictionless track when it collides with a larger, 1.00 kg cart at rest. After

spayn [35]

Answer:

$V_2=0.205m/s$

Explanation:

From the question we are told that

Moving Mass $m_1=0.1kg$

Velocity of cart $u_1=1.20 m/s$

Stationary Mass $m_2= 1.00 kg$

Recoil velocity $V_1=0.850 m/s$

Generally the equation of momentum is mathematically given by

$m_1u_1+0=m_1v_1+m_2v_2$

$(0.1)(1.20)+0=(0.1)(-0.850)+(1)v_2$

$V_2=0.205m/s$

Therefore speed of the stationary mass after collision is $V_2=0.205m/s$

4 0

2 years ago