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Klio2033 [76]
3 years ago
12

PLEASE HELP ME I AM TIMED!

Physics
1 answer:
IgorLugansk [536]3 years ago
5 0

Answer: B

Explanation: I can tell the block weights more since the water went down

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Three charges 1.5*10-6, 3*10-6, -3*10-6 are placed at three vertices of an equilateral triangle of side 30cm. Find the net force
gulaghasi [49]

Answer:

F = 0N

Explanation:

The force between two charges is given by

F=k\frac{q_1q_2}{r^2}

where r is the distance between the charges and K is the Coulomb's constant

(k=8-89*10^9Nm^2/C^2)

The force in the first charge is only the sum of the forces due to the other charges. Hence we have

F_T=F_1+F_2=k\frac{q_2q_1}{r^2}+k\frac{q_3q_1}{r^2}

F_T=(8.89*10^9\frac{Nm^2}{C^2})\frac{(3*10^{-6}C)(1.5*10^{-6}C)}{(0.3m)^2}+(8.89*10^9\frac{Nm^2}{C^2})\frac{(-3*10^{-6}C)(1.5*10^{-6}C)}{(0.3m)^2}\\\\F_T=0.445N-0.445N=0N

Ft=0N

Hope this helps!!

5 0
3 years ago
Read 2 more answers
The antiseptics used for cuts and wounds in human flesh have low surface tension. Why?
lakkis [162]
Because liquids with low surface tension spread easily, and therefore are easier to apply to cuts and wounds. 
4 0
3 years ago
Kamal, Kamala, Krishna invert a sum of RS= 30,000 on a business in the ratio 2 : 3 : 5. Find the each of their investment.​
Crazy boy [7]

Here's the <em><u>solution</u></em>,

Let the <em><u>shares</u></em> be 2x, 3x and 5x according to their shared <em><u>investment</u></em> ratio,

now, we know :

=》2x + 3x + 5x = 30000

=》10x = 30000

=》x = 3000

So, value of x = 3000

hence, the <em><u>share</u></em> of each <em><u>shareholder</u></em> is :

  • kamal = 2x = 6000
  • kamala = 3x = 9000
  • Krishna = 5x = 15000

i hope it helped.....

3 0
3 years ago
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Explain newton 2nd law ???<br><br>​
shusha [124]

Explanation:

Newton's second law simply says that the net force on an object is equal to the object's mass times its acceleration.

∑F = ma

For example, think of a game of tug-of-war, in which two teams pull on a rope in opposite directions.

If the forces are equal (balanced), then the net force is 0 N, so Newton's second law tells us that the rope's acceleration is 0 m/s².

If the forces are not equal (unbalanced), then the net force is not 0 N, and the rope will accelerate in the direction of the net force.

7 0
4 years ago
Robert dropped his new iPhone from his balcony. It hit the ground 3.5 seconds later. What was the height of his balcony?
Lorico [155]

its B. 60 meters

Explanation:

cause I looked up a calculator and solved it

8 0
3 years ago
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