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labwork [276]
4 years ago
12

Two people pull on a horizontal spring that is attached to an immovable wall. Then, they detach it from the wall and pull on opp

osite ends of the horizontal spring. They pull just as hard in each case. In which situation, if either, does the spring stretch more?
Physics
1 answer:
zimovet [89]4 years ago
3 0

Answer:In first case

Explanation:

When two People pull the spring, let the applied force by each person be F_o

and spring constant of spring be k

so Total force is 2F_o

total extension according to Hooke's law is

x=\frac{2F_o}{k}

When they detach the spring and apply force in opposite direction then force on either side is F so net extension is

x'=\frac{F_o}{k}

so in first case there will be more extension

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0.001225 kg/L x 720 000 000L =?
I am Lyosha [343]

Answer:

0.001225 kg/L × 720 000 000 L = 882000 kg

Explanation:

Given:

The equation to solve is given as:

0.001225 kg/L × 720 000 000 L = ?

Let us write each term of the product in terms of power of 10.

As 0.001225 has 6 digits after the decimal place, therefore, we use the exponent 6 for 10 and the sign is negative. This gives,

0.001225\ kg/L = 1225\times 10^{-6}\ kg/L

Now, for 720000000 L there are 6 zeros after 720. So, we use exponent 6 but with a positive sign. This gives,

720000000\ L=720\times 10^{6}\ L

Now, finding the product, we get:

0.001225\ kg/L\times 720000000\ L\\\\=1225\times 10^{-6}\ kg/L\times 720\times 10^6\ L\\\\=(1225\times 720)\times (10^6\times 10^{-6})\ (\frac{kg}{L}\times L)\\\\=882000\times 10^{6-6}\ kg\\\\=882000\times 10^0\ kg\\\\=882000\times 1\ kg\\\\=882000\ kg

Therefore, the product is equal to:

0.001225 kg/L × 720 000 000 L = 882000 kg

6 0
4 years ago
Which of the planets do not have moons?
lubasha [3.4K]

Answer:

Mercury and Venus

Explanation:

7 0
4 years ago
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Why do you need to wear a seatbelt when you are in a car?
Crank

Answer:

To protect you from fatal injuries and keep you secured in the case of an accident (my definition)

Explanation:

(Definition) Being buckled up during a crash helps keep you safe and secure inside your vehicle; being completely ejected from a vehicle is almost always deadly. If you don't wear your seat belt, you could be thrown into a rapidly opening frontal air bag. Such force could injure or even kill you.

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77julia77 [94]

Answer:

Dynamic exercises

Explanation:

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3 years ago
Malcolm and Ravi raced each other. The average of their maximum speeds was 260 km/h If doubled, Malcolm's maximum speed would be
AfilCa [17]

Answer

Given,

Average speed of Malcolm and Ravi = 260 km/h

Let speed of the Malcolm be X and speed of the Ravi Y.

From the given statement

\dfrac{X+Y}{2}=260

X + Y = 520 ....(i)

2X - Y = 80  ....(ii)

Adding both the equations

3 X = 600

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Putting value in equation (i)

Y = 520 - 200

Y = 320 Km/h

Speed of Malcolm = 200 Km/h

Speed of Ravi = 320 Km/h

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