There are two main groups of recyclable material,

Warm air aloft is normally higher pressure relative to colder air aloft, which is normally of lower pressure (at equivalent alti

Allisa [31]

Answer:

the statement given is False.

Explanation:

The pressure is defined by

P = F / A

The force of the air is its weight,

P = W_air / A

The weight of an air column on us depends on the energy of the molecules that is related to the temperature

E = 3/2 K T

When the air is warmer it has more energy so the molecules can move more distance and therefore the average density of the gas decreases, as the density decreases, the weight of the column on us also decreases, therefore the pressure low.

The correct statement is: When the air is hotter it has less pressure than when the air is cold.

It is summary the statement given is False

6 0

4 years ago

A tank with a volume of 0.150 m3 contains 27.0oC helium gas at a pressure of 100 atm. How many balloons can be blown up if each

jekas [21]

Answer:

884 balloons

Explanation:

Assume ideal gas, since temperature is constant, then the product of pressure and volume is constant.

So if pressures reduces from 100 to 1.2, the new volume would be

$V_2 = \frac{P_1V_1}{P_2} = \frac{100*0.15}{1.2} = 12.5 m^2$

The spherical volume of each of the balloon of 30cm diameter (15 cm or 0.15 m in radius) is

$V_b = \frac{4}{3}\pir^3 = \frac{4}{3}\pi 0.15^3 = 0.014 m^3$

The number of balloons that 12.5 m3 can fill in is

$V_2/V_b = 12.5 / 0.014 = 884$

8 0

3 years ago

Below is an oscilloscope trace from an AC supply. Calculate the frequency of the supply if each horizontal division represents 0

GuDViN [60]

Answer:

20 hertz of frequency produced.

Explanation:

$\boxed{frequency = \frac{1}{period} }$

Here we will find frequency and period should be in second, here given: 0.05 seconds

using the formula:

$\boxed{frequency = \frac{1}{0.05} }$

$\boxed{frequency =20}$

8 0

3 years ago

What is the kinetic energy of a 750 kg car moving at 50.0 km h?

Step2247 [10]

The kinetic energy of a 750 kg car moving at 50.0 km h is 72300 joules.

Given,

mass of car (m)= 750 kg

speed of car (v)= 50 km/h

= 50 x 5/18

= 13.9 m/s

we know that kinetic energy= 1/2 x m x v*v

= 1/2 x 750 x 13.9 *13.9

= 72300 joules

so the kinetic energy is 72300 joules.

Energy is the capacity of an object to do work, and like work, energy's unit is the joule (J). Energy exists in many different forms, but the one we think of most often when we think of energy is kinetic energy. Kinetic energy is often thought of as the energy of motion because it is used to describe objects that are moving.

Learn more about kinetic energy here :-

brainly.com/question/999862

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4 0

1 year ago

A 102 kg box is pushed on a linoleum floor with an acceleration of 2.5 ms to the second power. The force of the kinetic movie fr

maria [59]

A force is the push or pull acting on an object as a result of its interaction with another object. Here the net force acting on the box is 297 N

From the question

Given that,

Mass of the box ,m = 102 kg

Acceleration of the box ,a = 2.5 m/s²

Frictional force acting between the box and the floor ,f = 42 N

Here we have to find the net force acting on the body, F = ?

By Newton's second law of motion,

∑F = ma,

where, F is the net force

m is the mass of the body

a is the acceleration of the moving body

If the body is considered moving in the x-direction then,

F-f = ma

F - 42 = 102 x 2.5

= 255

F = 255 + 42 = 297 N

To learn more about force : brainly.com/question/12800231

#SPJ1

8 0

2 years ago