3 years ago

Sleepwalking, night terrors, and restless leg syndrome are all examples of what?

Physics

1 answer:

boyakko [2]3 years ago

4 0

Your answer in sleep insomnia, or the inability to affectively sleep

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What is a transformer

Leto [7]

A robot character that can transform into a car

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3 years ago

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1/A ball is dropped from the top of a building. After 3 seconds, its speed is measured to be 29.4 m/s. Calculate the acceleratio

AleksAgata [21]

Answer:

9.8

Explanation:

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2 years ago

A 47.2 kg girl is standing on a 177 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat,

Softa [21]

Answer:

v_g,i = 1.208 m/s

Explanation:

We are given;

Mass of girl; m_g = 47.2 kg

Mass of plank; m_p = 177 kg

Let the velocity of girl to ice be v_g,i

Let the velocity of plank to ice be v_p,i

Since the velocity of the girl is 1.53 m/s relative to the plank, then;

v_g,i + v_p,i = 1.53

From conservation of momentum;

m_g × v_g,i = m_p × v_p,i

Thus;

47.2(v_g,i) = 177(v_p,i)

Dividing both sides by 47.2 gives;

v_g,i = 3.75(v_p,i)

v_pi = (v_g,i)/3.75

Thus, from v_g,i + v_p,i = 1.53, we have;

v_g,i + ((v_g,i)/3.75) = 1.53

v_g,i(1 + 1/3.75) = 1.53

1.267v_g,i = 1.53

v_g,i = 1.53/1.267

v_g,i = 1.208 m/s

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3 years ago

What is the maximum possible resultant of two vectors with magnitudes of 2 and 4 units? what is the minimum possible resultant?

Alexeev081 [22]

When two vectors are in same direction then we add up to get their resultant and in this case resultant would be maximum

R = A + B

R = 4 + 2

R = 6

If vectors are in opposite direction then they provide minimum resultant and in this case we subtract them

R = A - B

R = 4 - 2

R = 2

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3 years ago

If a spring stores 5 j of energy when its compressed by 0.5 m. what is the spring constant

aliya0001 [1]

The elastic potential energy stored in a spring is given by:

$E=\frac{1}{2}kx^2$

where k is the spring constant, and x=0.5 is the compression of the spring. Re-arranging the formula and using E=5 J, we find the spring constant:

$k=\frac{2E}{x^2}=\frac{2(5 J)}{(0.5 m)^2}=40 N/m$

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3 years ago

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