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3 years ago

PLEASE GO ANSWER MY 3 MOST RECENT QUESTION I NEED HELP!!!!!!!!!!!!!!

1 answer:

5 0

Positive or negative charged will induce a dipole on the neutral charge, causing it to attract to either charge. Adding protons to an atom causes positive charge and adding electrons to an atom adds negative charge. Your hair and the gallon are naturally charged, so they induce a dipole in each other and cause themselves to mutually attract. Inducing a dipole is when a neutral charge has some of its positive or negative charges dragged to one side creating net positive charge on one side and net negative charge on the other.

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wo ships, one 200200 metres in length and the other 100100 metres in length, travel at constant but different speeds. When trave

shutvik [7]

Answer:

The speed of the faster ship is 22.5 m/s

Explanation:

The length of the ships are;

Ship 1 = 200 m

Ship 2 = 100 m

The time it takes for the ships to completely cross each other when travelling in opposite directions = 10 seconds

The time it takes both ships to cross each other when travelling in the same direction = 25 seconds

Let x represent the speed of the first ship, ship 1, and y represent the speed of the second ship, ship, 2, we have;

(x + y) × 10 = 200 + 100 = 300

10·x + 10·y = 300...(1)

(x - y) × 20 = 200 + 100 = 300

20·x - 20·y = 300...(2)

Multiply equation (1) by 2, to get;

(x + y) × 10 × 2 = 300 × 2

20·x + 20·y = 600...(3)

Adding equation (1) to equation (3) gives;

20·x + 20·y + 20·x - 20·y = 600 + 300

40·x = 900

x = 900/40 = 22.5

x = 22.5

The speed of the first ship, ship 1 = x = 22.5 m/s

From equation (1), we have;

10·x + 10·y = 300

y = (300 - 10·x)/10 = (300 - 10×22.5)/10 = 7.5

y = 7.5

The speed of the second ship, ship 2 = y = 7.5 m/s

Therefore, the faster ship is ship 1 with a speed of 22.5 m/s

7 0

3 years ago

A 4.40-m-long, 500 kg steel uniform beam extends horizontally from the point where it has been bolted to the framework of a new

icang [17]

Answer:

Torque=13798.4 N.m

Explanation:

Given data

Mass of beam m₁=500 kg

Mass of the person m₂=70 kg

length of steel r₁=4.40m

center of gravity of the beam is at r₂=r₁/2 =4.40/2 = 2.20m

To find

Torque

Solution

Torque due to beam own weight

$T_{1}=m_{1}gr_{1}\\ T_{1}=500*2.2*9.8\\T_{1}=10780N.m$

Torque due to person

$T_{2}=m_{2}r_{2}g\\T_{2}=70*(4.40)*(9.8)\\T_{2}=3018.4 N.m$

Now for total torque

$T_{total}=T_{1}+T_{2}\\T_{total}=10780+3018.4\\T_{total}=13798.4N.m$

4 0

3 years ago

Tyler wants to learn about the types of insects in the soil near his house. Which would be a benefit of carrying out a descripti

lara31 [8.8K]

To gather more information and details on the soil

8 0

3 years ago

What is the work done by the friction when the body slides against a rough horizontal surfaces?

katovenus [111]

Negative work

Hope this helps :)

4 0

2 years ago

What is the size of earth?

shtirl [24]

Answer:

Google it

Explanation:

Best if you use google

4 0

3 years ago

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