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3 years ago

Bola bermassa 200 gram dilempar

Physics

1 answer:

ikadub [295]3 years ago

8 0

Answer:

0.4

Explanation:

$\frac{1}{2} mv ^{2}$

kinetic energy formula , potential energy is not considered

0.5×0.2×2×2

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The drawing shows an equilateral triangle, each side of which has a length of 2.00 cm. Point charges are fixed to each corner, a

Kipish [7]

Answer:

$-2.60097\times 10^{-6}\ C$

Explanation:

k = Coulomb constant = $8.99\times 10^{9}\ Nm^2/C^2$

r = Distance between charges = 2 cm

The electric force is given by

$F=\dfrac{k4\times 10^{-6}q_A}{r^2}$

Also

$F=\dfrac{k4\times 10^{-6}q_B}{r^2}$

The sum of the force is given by

$\sum F=\dfrac{k4\times 10^{-6}q_A}{r^2}cos 30+\dfrac{k4\times 10^{-6}q_B}{r^2}cos 30\\\Rightarrow \sum F=2\dfrac{k4\times 10^{-6}q_A}{r^2}cos 30\\\Rightarrow q_a=\dfrac{\sum Fr^2}{2\times k4\times 10^{-6}cos30}\\\Rightarrow q_a=\dfrac{405\times 0.02^2}{2\times 8.99\times 10^9\times 4\times 10^{-6}cos30}\\\Rightarrow q_a=2.60097\times 10^{-6}\ C$

Thus $q_a=q_b=-2.60097\times 10^{-6}\ C$ .

The negative sign is because the force points downward which is taken as negative

7 0

4 years ago

The density of un-set concrete is 2.40 x 10 3 kg/m 3 . When a block with volume 0.0708 m 3 is submerged in the liquid, a force o

Alenkinab [10]

Answer:

The answer to your question is weight = 1667 N

Explanation:

Data

density = 2.40 x 10³ kg/m³

volume = 0.0708 m³

Force = 66.7 N

weight of the block = ?

- Formula

density = mass / volume

- Solve for mass

mass = density x volume

-Substitution

mass = (2.40 x 10³)(0.0708)

-Result

mass = 169.92 kg

-Calculate the weight of the body

weight = mass x gravity

-Substitution

weight = 169.92 x 9.82

-Simplification

weight = 1666.9 N ≈ 1667 N

6 0

3 years ago

You place a small air cart on a 4.00 m air track and set it into motion with a speed of 0.75 m/s. Due to very good elastic bumpe

san4es73 [151]

Answer:

6 seconds

0.167 Hz

Explanation:

Distance = 4 m

Velocity = 0.75 m/s

Period is given by

$T=2\times Distance\times Velocity\\\Rightarrow T=2\times 4\times 0.75\\\Rightarrow T=6\ s$

The period of the motion is 3 seconds

Frequency is given by

$f=\frac{1}{T}\\\Rightarrow f=\frac{1}{6}\\\Rightarrow f=0.167\ Hz$

The frequency of the motion is 0.33 Hz

3 0

3 years ago

Which of the following classifications of matter includes materials that can no longer be identified by their individual propert

lozanna [386]

The correct answer is B, I think

hope this helps

3 0

3 years ago

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During the process of psychotherapy, Elaine recovered some long-forgotten and painful memories from her childhood. This experien

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In psychoanalytic therapies, this gives credence and value to an individual's childhood experiences and the unconscious. This would suggest that childhood experiences are highly involve in later life.

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3 years ago