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3 years ago

Two boys, Shrijan having weight 600N and Shrijesh having weight

Physics

1 answer:

andreev551 [17]3 years ago

5 0

Answer:

to be balanced moments should be equal

Explanation:

$fd = fd \\ 600 \times 2 = 300 \times x \\ \frac{600 \times 2}{300} = x \\ 4m$

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Explain why teens are especially weak at impulse control

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Answer:

One explanation may be that as a group, teenagers react more impulsively to threatening situations than do children or adults, likely because their brains have to work harder to rein in their behavior, a research team reported here yesterday at the Society for Neuroscience meeting

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3 years ago

NO LINK ANSWERS NEED HELP FAST

Maru [420]

Answer:

B would be the correct answer

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3 years ago

Read 2 more answers

(Conservation of Momentum)

Rainbow [258]

Answer:

I haven't learnt physics at all yet but I'll try.

After the two cars collide, they move at 6 m/s.

This tells us that the 2nd car which collided with the first car which is 2000 kg is much heavier than the 1st one, if the second one was lighter, the two cars coupled together speed would be much more than just 6 m/s.

Refer to explanation for working.

Explanation:

Now find out how much g or kg is the 2nd car more than the 1st.

2000 ÷ 10 = 200 (I don't really know how to explain this part)

10 - 6 = 4 (Difference for 1st car average speed per second and the coupled cars average speed per second)

200 x 4 = 800

2000 + 800 = 2800 kg

(Final answer)

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3 years ago

How many significant digits is found in the number 1.87 x 10^6

aniked [119]

Answer: 3 significant digits

Explanation:

When a number is written in scientific notation (representing the number using powers of base ten) it is expressed so that it contains a digit in the place of the units and all other digits after the decimal point, multiplied by the respective exponent.

Then, the significant figures (or significant digits) will be the digits that are before the power of ten.

For example, the number $5.234(10)^{3}$ has 4 significant figures.

Now, in the case of the number $1.87(10)^{6}$ it contains 3 significant figures.

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4 years ago

Many cultures around the world still use a simple weapon called a blowgun, a tube with a dart that fits tightly inside. A sharp

Yuki888 [10]

Answer:

F = 1.06N

Explanation:

In order to calculate the force that produces the given pressure you take into account the following formula:

$P=\frac{F}{A}$ (1)

P: pressure = 6.0kPa = 6.0*10³ Pa

F: force = ?

A: cross-sectional area of the tube = π r^2

r: radius of the tube = 1.5cm/2 = 0.75cm = 0.75*10^-2 m

You solve the equation (1) for F, and replace the values for the area A and the pressure P:

$F=PA=(6.0*10^{3}Pa)(\pi(0.75*10^{-2}m)^2)\\\\F=1.06N$

The force tha produces a pressure of 6.0kPa in a tube with a diameters of 1.5cm is 1.06N

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4 years ago