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3 years ago

Help please

Physics

1 answer:

trasher [3.6K]3 years ago

6 0

Answer:

This doesn't seem to really be a physics problem:

In physics stress is usually defined as Young's Modulus or Bulk Modulus

In the case of Young's Modulus Y would be defined as

Y = Stress / Strain or Force / Area

So the stress would be the force acting on some particular area: in the case of a wire the area is merely the area of the wire where the force is applied.

So maybe, they mean that stress would be an increase in blood pressure or some other physiological reaction due to an externally applied force.

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The speed of the fastest pitched baseball was 45 m/s, and the ball’s mass was 145 g. How fast would a 59 g ball have to travel t

dsp73

59 g ball will travel upto 110 m/s

A. 110 m/s

<u>Explanation: </u>

Given datas are as follows

Speed of the pitched baseball = 45 meters/second

Mass of the baseball = 145 gram

Mass of the assumed ball = 59 gram

Both the balls travelled in the same momentum

Formula to find the momentum of an object is,

Momentum (p) = Mass (m) × velocity (v) (unit is kilogram meter per second (kg-m/s))

Momentum = 145 × 45 kilogram meter per second

Momentum = 6525 kilogram meter per second

Now calculate the speed of a ball with mass 59 g to have the momentum of about 6525 kilogram meter per second

Speed = momentum ÷ mass (meters per second)

Speed = 6525 ÷ 59 (meters per second)

Speed = 110 meters per second

Therefore a 59 gram (g) ball have to travel at a speed of 110 meters per second to have the momentum of 6525 kilogram-meter per second.

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3 years ago

The Sun is a type G2 star. Type G stars (from G0 to G9) have a range of temperatures from 5200 to 5900. What is the range of log

otez555 [7]

Answer:

Explanation:

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8 0

3 years ago

You are designing a system for moving aluminum cylinders from the ground to a loading dock. You use a sturdy wooden ramp that is

8_murik_8 [283]

Answer:

a = αR

Then We apply the Newton's second law of motion:

∑ F = ma

F - mg sinθ - f = ma.

F - mg sinθ - μmg cosθ = ma

Using given data we have:

F - 3217 = 470a ........................... (1)

Apply the Newton's law for rotation:

∑τ = I α

FR - (mg sinθ)R = $(\frac{mR^2}{2}+mR^2)\frac{a}{R}$

then: F - mg sinθ = 3ma / 2.

F - 2774 = 705a .......................... (2)

solving 1 and 2 we get:

F = 4103 N

a = 1.885 m/s²

b) In this case the time is given by:

t = $\sqrt{\frac{2d}{a}}$ it comes from: d = $v_ot+\frac{1}{2}at^2$ starting from rest vo = 0

t = $\sqrt{\frac{2*9}{1.885}$ = 3.09 s

8 0

3 years ago

Which of the following is a form of kinetic energy?

Fudgin [204]

Answer:

hope this helps.

Explanation:

______

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3 years ago

A 13.0 g piece of Styrofoam carries a net charge of â5.40 Î¼C and floats above the center of a large horizontal sheet of plastic

kati45 [8]

Answer:

σ =4.180×10^{-9} C/m^2

Explanation:

electric field due to non conducting sheet is

$E=\frac{\sigma}{2\epsilon_0}$

the force acting on the piece of Styrofoam

Eq= mg

⇒E= mg/q

now,

$\frac{mg}{q} = \frac{\sigma}{2\epsilon_0}$

⇒ $\sigma= \frac{2mg\epsilon_0}{q}$

$\sigma= \frac{2\times0.013\times9.81\times8.85\times10^{-12}}{5.40\times10^{-4}}$

charge per unit area (in C/m2) on the plastic sheet σ =4.180×10^{-9} C/m^2

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4 years ago