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andrew-mc [135]
3 years ago
11

A cue ball with mass 170g hits a stationary number 8 ball, which has mass 160g. The cue ball

Physics
1 answer:
forsale [732]3 years ago
3 0

Answer:

0.49 m/s

Explanation:

The law of conservation of linear momentum states that the sum of momentum in a system before and after collision are same. Momentum is a product of mass and velocity of an object hence in this case

m_cu_c+m_8u_8=m_cv_u+m_8v_8

Where m represent mass, u and v represent the initial and final velocities respectively, subscripts c and 8 represent cue ball and number 8 ball respectively.

Since number 8 ball is initially at rest, its initial velocity is zero. Replacing mass of cue ball with 170 g while mass of number 8 ball with 160g, then taking final velocity of cue ball as 0.2 m/s and final velocity of 8 ball as 0.3 m/s then we get

170u_c+160*0=170*0.2+170*0.3\\u_c\approx 0.49 m/s

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Mamont248 [21]

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Explanation:

Clinical Thermometer is meant for clinical purposes. It is developed for measuring the human body temperature. A laboratory thermometer, which is colloquially known as the lab thermometer, is used for measuring temperatures other than the human body temperature.

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Which statement best describes why specific heat capacity is often more useful than heat capacity for scientists when comparing
maks197457 [2]

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Specific heat capacity is an intensive property and does not depend on sample size.

Explanation:

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3 years ago
The elements are mostly likely to form more than one type of ion are the
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Alkali Metals ......................................

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A runner moves 2.88 m/s north. She accelerates at 0.350 m/s^2 at a -52.0 angle. At the point in the motion where she is running
MrRissso [65]

The runner has initial velocity vector

\vec v_0=\left(2.88\dfrac{\rm m}{\rm s}\right)\,\vec\jmath

and acceleration vector

\vec a=\left(0.350\dfrac{\rm m}{\mathrm s^2}\right)(\cos(-52.0^\circ)\,\vec\imath+\sin(-52.0^\circ)\,\vec\jmath)

so that her velocity at time t is

\vec v=\vec v_0+\vec at

She runs directly east when the vertical component of \vec v is 0:

2.88\dfrac{\rm m}{\rm s}+\left(0.350\,\dfrac{\rm m}{\mathrm s^2}\right)\sin(-52.0^\circ)\,t=0\implies t=10.4\,\rm s

It's not clear what you're supposed to find at this particular time... possibly her position vector? In that case, assuming she starts at the origin, her position at time t would be

\vec x=\vec v_0t+\dfrac12\vec at^2

so that after 10.4 s, her position would be

\vec x=(10.1\,\mathrm m)\,\vec\imath+(17.2\,\mathrm m)\,\vec\jmath

which is 19.9 m away from her starting position.

8 0
3 years ago
Read 2 more answers
The critical angle in air for a particular type of glass is 39.0°. What is the speed of light in this class glass? (c = 3.00 × 1
hodyreva [135]

Answer:

speed of light in glass ≈ 1.89*10^{8}m/s

Explanation:

refractive index (n) =\frac{1}{sinC}            .......................equation 1

refractive index (n) = velocity of light in air/ velocity of light in medium  ....equ2

equate equation 1 and two;

\frac{1}{sinC} = \frac{c}{speed of light in glass}

speed of light in glass = c*sinC

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speed of light in glass = 188,796,117.314 m/s

speed of light in glass ≈ 1.89*10^{8}m/s

7 0
3 years ago
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