All categories

3 years ago

Hằng số phổ biến chất khí

Physics

1 answer:

padilas [110]3 years ago

8 0

Answer:

please in english......................................

Explanation:

You might be interested in

A pressure cooker cooks a lot faster than an ordinary pan by maintaining a higher pressure and temperature inside. the lid of a

BlackZzzverrR [31]

Answer:

$m=40.816\ gm$

Explanation:

Given;

The operational pressure of the cooker, $P=10^5\ Pa (gauge)$

area of the opening, $a=4\ mm^2$

We know that the gauge pressure is measured with respect to the atmospheric pressure. As the atmospheric pressure acts on all the components of the system being observed so, we only need to counter the gauge pressure.

As the petcock sits on the opening of the cross-section so, it balances the built-in pressure due to its weight.

<u>Hence:</u>

$m.g=P\times a$

where:

$m=$ mass of the petcock

$g=$ acceleration due to gravity

$m\times 9.8=10^5\times 4\times 10^{-6}$

$m=40.816\ gm$

6 0

3 years ago

The area of the atom surrounding the nucleus is mostly what

alexdok [17]

Empty space; an atom consists of a dense, positively charged nucleus surrounded by a "cloud" of negatively charged electrons

5 0

3 years ago

If the distance from a converging lens to the object is less than the focal length of the lens, the image will be _______ the ob

VLD [36.1K]

<span>virtual, upright, and larger than. just took the test

</span>

6 0

4 years ago

Read 2 more answers

The elevator accelerates upward (in the positive direction) from rest at a rate of 1.95 m/s2 for 2.15 s. Calculate the tension i

sammy [17]

The mass is missing. The mass of the elevator is 1650 kg.

Answer:

The tension in the cable is 19387.5 N.

Explanation:

Given:

Initial velocity of the elevator (u) = 0 m/s

Acceleration in the upward direction (a) = 1.95 m/s²

Time taken by the elevator (t) = 2.15 s

Mass of the elevator and persons (m) = 1650 kg

Let the tension in the cable wire be 'T' Newtons.

Now, there are 2 forces acting in the vertical direction. One is tension in the upward direction and the other the weight of the elevator in the downward direction.

As the elevator is accelerating upward, the net force acts in the upward direction.

So, net force on the elevator is given as:

$F_{net}=T-mg$