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3 years ago

Urgent!!!I need this fast!!!!!

Physics

1 answer:

VMariaS [17]3 years ago

7 0

28: b
29: a
30: c
31: Not sure because wool comes from sheep and rabbits and there are wools that are petroleum based..
32: a
33: a
34: d
35: d

Hope this helps :)

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An atom has a negative charge which if the following must have occurred

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A pan hangs from a 50 cm spring. When a 10 kg mass is placed in the pan, it stretches the spring 6 cm. What is a function rule l

MrRissso [65]

Answer:

Explanation:

A Spring stretches / compresses when force is applied on them and they are governed by the Hookes Law which states that the force required to stretch or compress a spring is directly proportional to the distance it is stretched.

$F = -kx$

F is the force applied and x is the elongation of the spring

k is the spring constant.

negative sign indicates the change in direction from equilibrium position.

In the given question, we dont have force but we know that the pan is hanging. We also know from the Newton's second law of motion that

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$mg=-kx$

computing it for x,

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This is the model which will tell the length of the spring against change in the mass located in the pan.

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3 years ago

The human tibia breaks under an impulse of 55 Ns. If after falling a person typically comes to eat in a time span of 0.005 s how

ozzi

Answer:

0.73 m/s

Explanation:

From Newton second law of motion,

I = m(v-u)...................... Equation 1

Where I = Impulse, m = mass of the person, v = final velocity, u = Initial velocity.

make v the subject of the equation

v =(I/m)+u................. Equation 2

Note: u = 0 m/s as the person is falling from an height.

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