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3 years ago

Place the following into scientific notation...(.000635) *

Physics

1 answer:

AleksAgata [21]3 years ago

6 0

6.35x10^-4 OR 6.3x10-4 (if only one decimal number is allowed)

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How much heat is absorbed by 60g of copper when it is heated from 20°C to 80°C

nexus9112 [7]

Answer:

I HOPE THIS IS CORRECT

Explanation:

It is heated from 20°C to 80°C. We need to find the heat absorbed. It can be given by the formula as follows : So, 1386 J of heat is absorbed.

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Surgical repair of a muscle

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3 years ago

A small block is attached to a spring with a spring constant of 85 N/m. When the spring is compressed 0.30 meters and the releas

Pachacha [2.7K]

Answer:

Explanation:

These Hooke's Law problems are tricky. Here's what we need to know that clears up the problem entirely. The final and also the max speed of the block will be reached at the point where the potential energy of the system is 0. So the equation we need, namely,

$KE+PE=\frac{1}{2}kA^2$ can be simplified down to

$KE=\frac{1}{2}kA^2$ and we solve this first for KE:

$KE=\frac{1}{2}(85)(.30)^2$ and, paying NO attention whatsoever to significant digits here (because if you did the answer you get is not one of the choices)

KE = 3.825 J. Now we can use that value of kinetic energy and solve for the speed we need:

$KE=\frac{1}{2}mv^2$ so

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$v=\sqrt{\frac{2(3.825)}{.50} }$ so

v = 3.91 m/s

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2 years ago

A flask is filled with 1.57 L (L: liter) of a liquid at 90.6 °C. When the liquid is cooled to 10.2 °C, its volume is only 1.38 L

nydimaria [60]

The coefficient of volume expansion of the liquid = 1.97 × 10⁻³ /⁰C

<h3>What is the coefficient of volume expansion of the liquid?</h3>

The amount of volume that a substance expands by per unit of its original volume for each degree that its temperature rises is known as the coefficient of volume expansion.

As we know, The coefficient of volume expansion of the liquid

= change in volume/(original volume × temperature difference)

= (V₂ - V₁)/[V₁ × (T₂ - T₁)]

Change in volume = (V₂ - V₁)

Here, V₂ ( final volume) = 1.31 L

V₁ (initial volume)= 1.55 L

T₂ (final temperature) = 14.7 degrees

T₁ (initial temperature) = 96 degrees

The coefficient of volume expansion of the liquid

= (1.31 - 1.55) / [1.5 × (14.7- 96)]

= 1.97 × 10⁻³ /⁰C

Thus, the coefficient of volume expansion of the liquid = 1.97 × 10⁻³ /⁰C

To know more about coefficient of volume expansion refer to:

brainly.com/question/24042303

#SPJ1

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1 year ago

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3 years ago