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3 years ago

Why does methane have a low boiling point?

Physics

2 answers:

svlad2 [7]3 years ago

4 0

The molecules held together are to weak so the substance melt and boil at low points.

SashulF [63]3 years ago

4 0

The molecules are held together by weak forces so the substances have low boiling points. It doesnt have electricity.

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The speed of sound in air is about 340 m/s. What is the wavelength of sound waves produced by a guitar string vibrating at 512 H

expeople1 [14]

The answer to this question would possibly be E.

3 0

4 years ago

) A skier starts down a frictionless 32° slope. After a vertical drop of 25 m, the slope temporarily levels out and then slopes

EastWind [94]

Answer:

The skier’s speed on the two level stretches are 22.13 m/s and 27.29 m/s.

Explanation:

Given that,

Slope down = 32°

Height = 25 m

Before leveling,

Slope down = 20°

Height = 38 m

We need to calculate the skier’s speed on the two level stretches

Using formula of energy

$P.E=K.E$

$mgh=\dfrac{1}{2}mv^2$

$v=\sqrt{2gh}$

For first stretch,

Height = 25 m

Put the value into the formula

$v=\sqrt{2\times9.8\times25}$

$v=22.13\ m/s$

For second stretch,

Height = 38 m

Put the value into the formula

$v=\sqrt{2\times9.8\times38}$

$v=27.29\ m/s$

Hence, The skier’s speed on the two level stretches are 22.13 m/s and 27.29 m/s.

5 0

4 years ago

Please help very easy 5th grade work giving brainliest

zhenek [66]

Answer:

the answer is option B because opposit sides of the magnets attract each other

8 0

3 years ago

Suppose a NASCAR race car rounds one end of the Martinsville Speedway. This end of the track is a turn with a radius of approxim

crimeas [40]

Answer:

Centripetal acceleration of the car is 17.4 m/s²

Explanation:

It is given that,

Radius of the track, r = 57 m

Speed of car, v = 31.5 m/s

We need to find the centripetal acceleration of the race car. The formula for the centripetal acceleration is given by :

$a=\dfrac{v^2}{r}$

$a=\dfrac{(31.5\ m/s)^2}{57\ m}$

$a=17.4\ m/s^2$

So, the centripetal acceleration of the race car is 17.4 m/s². Hence, this is the required solution.

5 0

3 years ago

Dos automóviles que marchan en el mismo sentido, se encuentran a una distancia de 126 Km. Si el más lento va a 42 Km/h, calcular

puteri [66]

Answer:

<em>La velocidad del más rápido deberá ser de 63 Km/h</em>

Explanation:

<u>Movimiento Rectilíneo Uniforme (MRU)</u>

Un cuerpo se dice que tiene MRU cuando recorre iguales distancias en tiempos iguales y en línea recta.

Tenemos dos automóviles viajando en el mismo sentido. Uno, el más lento va por delante del otro que le ancanzará en t=6 horas una vez que supere la ventaja que le lleva el otro.

La velocidad se puede calcular con la fórmula:

$\displaystyle v=\frac{x}{t}$

Donde x es la distancia y t el tiempo que tarda en recorrerla.

El vehículo más rápido alcanzará al otro cuando logre superar los x=126 Km que le lleva. Si esto lo hace en t=6 horas, entonces la velocidad adicional que deberá desarrollar es:

$\displaystyle v=\frac{126}{6}=21\ Km/h$

Esa velocidad se suma a la del primer vehículo y tendremos la velocidad necesaria: 42 Km/h + 21 Km/h = 63 Km/h

La velocidad del más rápido deberá ser de 63 Km/h

5 0

3 years ago