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harkovskaia [24]
3 years ago
5

How can I change my Brainly username?

Physics
2 answers:
Ainat [17]3 years ago
8 0
In the current brainly version, unfortunately you could not change your username.

The only way is to create a new account, but of course all of your points will be gone
mina [271]3 years ago
4 0

Answer:

Hi there! For changing your username you can contact to administrator of the site. If you are using app then go to message option. Then search "rishilaugh" then you can message him.

Explanation:

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A 60 kg man jumps down from a 0.8 m table. What is the speed when he
Rom4ik [11]

Answer: Speed = 4 m/s

Explanation:

The parameters given are

Mass M = 60 kg

Height h = 0.8 m

Acceleration due to gravity g= 10 m/s2

Before the man jumps, he will be experiencing potential energy at the top of the table.

P.E = mgh

Substitute all the parameters into the formula

P.E = 60 × 9.8 × 0.8

P.E = 470.4 J

As he jumped from the table and hit the ground, the whole P.E will be converted to kinetic energy according to conservative of energy.

When hitting the ground,

K.E = P.E

Where K.E = 1/2mv^2

Substitute m and 470.4 into the formula

470.4 = 1/2 × 60 × V^2

V^2 = 470.4/30

V^2 = 15.68

V = square root (15.68)

V = 3.959 m/s

Therefore, the speed of the man when hitting the ground is approximately 4 m/s

4 0
3 years ago
What are tiny sacs at the end of the bronchioles filled with air called?
WARRIOR [948]

Answer:

Alveoli

The bronchioles end in tiny air sacs called alveoli, where oxygen is transferred from the inhaled air to the blood.

Hope this helps :)

7 0
3 years ago
consider the mirror from the last question. an object 4cm tall stands 10cm in front of a converging mirror of focal length 5cm.
aleksandr82 [10.1K]
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6 0
3 years ago
Read 2 more answers
A 4.44 l container holds 15.4 g of oxygen at 22.55°c. what is the pressure?
padilas [110]
We will use the ideal gas equation:
PV = nRT, where n is moles and equal to mass / Mr
P = mRT/MrV
P = 15.4 x 8.314 x (22.55 + 273) / 32 x 4.44
P = 266.3 kPa
5 0
3 years ago
Convert time from 12-hour to 24-hour clock. ​
Kamila [148]
22:54 is the answer you are looking for
6 0
3 years ago
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