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stealth61 [152]
3 years ago
5

Quartz gold and calcite are examples of?coal is what

Physics
1 answer:
givi [52]3 years ago
5 0
Quartz, gold and calcite are examples of minerals, coal is a fossil fuel
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An aluminum bar 600mm long, with diameter 40mm, has a hole drilled in the center of the bar. The hole is 40mm in diameter and 10
s2008m [1.1K]

Answer:

<em>1.228 x </em>10^{-6}<em> mm </em>

<em></em>

Explanation:

diameter of aluminium bar D = 40 mm  

diameter of hole d = 30 mm

compressive Load F = 180 kN = 180 x 10^{3} N

modulus of elasticity E = 85 GN/m^2  = 85 x 10^{9} Pa

length of bar L = 600 mm

length of hole = 100 mm

true length of bar = 600 - 100 = 500 mm

area of the bar A = \frac{\pi D^{2} }{4} =  \frac{3.142* 40^{2} }{4} = 1256.8 mm^2

area of hole a = \frac{\pi(D^{2} - d^{2}) }{4} = \frac{3.142*(40^{2} - 30^{2})}{4} = 549.85 mm^2

Total contraction of the bar = \frac{F*L}{AE} + \frac{Fl}{aE}

total contraction = \frac{F}{E} * (\frac{L}{A} +\frac{l}{a})

==> \frac{180*10^{3}}{85*10^{9}} *( \frac{500}{1256.8} + \frac{100}{549.85}) = <em>1.228 x </em>10^{-6}<em> mm </em>

6 0
3 years ago
As water rises through the troposphere and cools, it changes from a(n) ————- to a(n) ———— through the process of condensation; w
Hoochie [10]

Answer:

GAS,   LIQUID,    CLOUDS

Explanation:

Water can be in three states: solid, liquid and gas, passing from one to another depending on the pressure and temperature.

In this complementation exercise.

When the water cools down the GAS goes to the LIQUID state, these small drops unite and form the CLOUDS

4 0
3 years ago
How far did a boulder roll if its speed was 2.6 m/s and it rolled for 160 s?
miv72 [106K]
The answer is 4.8 I know yes because I did the question and Good luck on edunity
5 0
3 years ago
A force is a push or a pull applied to a body or an object. Consider the workout you just participated in. What forces were pres
Law Incorporation [45]
Gravity and friction
7 0
3 years ago
. A crane does 62,500 joules of work to lift a boulder a distance of 25.0 meters. How much did the boulder
ELEN [110]

Answer:

<h2>2500 N</h2>

Explanation:

The weight of the object can be found by using the formula

f =  \frac{w}{d}  \\

w is the workdone

d is the distance

From the question we have

f =  \frac{62500}{25}  \\

We have the final answer as

<h3>2500 N</h3>

Hope this helps you

3 0
3 years ago
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