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3 years ago

Airplanes moves in blank dimensions through. What is Blank

Physics

2 answers:

Feliz [49]3 years ago

8 0

Blank is empty/nothing there

raketka [301]3 years ago

6 0

Blank is something empty lol

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An unknown mass of each of the following substances, initially at 23.0, absorbs 1910 of heat. The final temperature is recorded

babymother [125]

The data not given here is the specific heat capacity of pyrex glass equal to 0.75(J/g °C). In this case, heat is equal to mass x specific heat capacity x temperature rise. Temperature difference is then equal to 1910 J / 0.75 J/g °C / 23 g equal to 110. 75 <span>°C </span>

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4 years ago

Which of the following is the best reason that trees care important for overall air quality?

Marina86 [1]

Trees are important because oxygen

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3 years ago

A block is given a very brief push up a 20.0° frictionless incline to give it an initial speed of 12.0 m/s. (a) how far along th

shtirl [24]

The incline is frictionless, this means we can use the conservation of energy: the initial kinetic energy of the block
$K= \frac{1}{2}mv^2$
is converted into gravitational potential energy
$U=mgh$
where h is the height reached by the block as it stops. By equalizing the two formulas, we get
$\frac{1}{2} mv^2=mgh$
$h= \frac{v^2}{2g}= \frac{(12.0 m/s)^2}{2(9.81 m/s^2)} =7.3 m$

However, this is the maximum height reached by the block. The distance along the surface of the plane is given by:
$d= \frac{h}{\sin 20^{\circ}}= \frac{7.3 m}{\sin 20^{\circ}}=21.3 m$

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4 years ago

How are characteristic properties of a given substance different from its other properties and chemical properties

serg [7]

Characteristic properties of a given substance is different from its other properties is that there is no change as to what it is no matter how big or how small the sample of the given substance is. Another thing is that it doesn't affect the chemical nature of the matter. The characteristic properties of a given substance can either be a physical property of the substance or a chemical property of the substance. Either way, there is no change to it even if the size of the substance changes.

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3 years ago

A batter hits a 0.140-kg baseball that was approaching him at 50.0 m/s and, as a result, the ball leaves the bat at 35.0 m/s in

KonstantinChe [14]

Answer:

Impulse, J = 2.1 kg-m/s

Explanation:

Given that,

Mass of baseball, m = 0.14 kg

It was approaching him at 50.0 m/s and, as a result, the ball leaves the bat at 35.0 m/s in the direction of the pitcher. We need to find the magnitude of Impulse delivered to the baseball.

The change in momentum is equal to the Impulse imparted to the ball i.e.

$J=m(v-u)$

$J=0.14(-35-50)$

J = -2.1 kg-m/s

So, the Impulse delivered to the baseball is 2.1 kg-m/s

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3 years ago