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r-ruslan [8.4K]
3 years ago
13

The cost, density and resistivity of copper, steel and aluminum

Physics
1 answer:
otez555 [7]3 years ago
3 0
Density of copper: 8,9
Density of steel: 7,7
Density of aluminum: 2,7
And
Resistivity of copper: 1,7
Resistivity of steel: 16,9
Resistivity of aluminum: <span>2,7</span>

Hope I Helped You!!! :-)

Have A Good Day!!!
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At time t=0 a grinding wheel has an angular velocity of 28.0 rad/s . It has a constant angular acceleration of 35.0 rad/s2 until
notsponge [240]

Answer:

a).x_{t}=583.3rad

b).t_{total}=10.52s

c).a=12.62 \frac{rad}{s^2}

Explanation:

The angular acceleration is constant so we can use the formulas of uniform motion with the model of angular acceleration

a).

x_{r}=x_{i}+v_{i}+\frac{1}{2}a_{a}*t^2

x_{r}=0+28.0\frac{rad}{s}*2.20s+\frac{1}{2}*35.0\frac{rad}{s^2}*2.20s

x_{r}=146.3rad

so the total angle between t=0 and the time it stopped is

x_{t}=146.3rad+437rad=583.3rad

b).

w_{f}=w_{o}+a*t

w_{f}=28.0rad/s+35rad/s^2*2.2s=105rad/s=w_{o}

x_{t}-x_{r}=\frac{1}{2}*(w_{o}-w_{f})*t

583.3-146.3=\frac{1}{2}*(105-0)*t

t=\frac{437rad}{105\frac{rad}{s}}=8.32s

t_{total}=8.32+2.2=10.52s

c).

w_{f}=w_{o}+a*t

0=105 rad/s+a*8.32s

a=\frac{105 rad/s}{8.32s}

a=12.62 \frac{rad}{s^2}

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4 years ago
What type of animals does Dr. Grant study?
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Dr. Alan Grant is the main protagonist in Jurassic Park, with the book written primarily from his perspective. He is a paleontology professor at the University of Denver and receives research funding from the Hammond Foundation. He became a world-renowned paleontologist after discovering dinosaur nest fossils in Montana. Billionaire John Hammond chooses Dr. Grant to evaluate his dinosaur amusement park because of his professional expertise and unbiased opinion on dinosaurs.

Idk if this is related to what you ask but it might help.
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3 years ago
Average human body temperature is 98.6°F. What is the equivalent in degrees Celsius?
Gala2k [10]

37° Celsius is equal to 98.6° Fahrenheit

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3 years ago
A child swings on a playground swing. How many times does the child swing through the swing's equilibrium position during the co
Karolina [17]
<h2>The child swing through the swing's equilibrium position 6 times during the course of 3 periods.</h2>

Explanation:

One period means time taken to complete one revolution.

In case of swings in one period time it travels the same position through two times.

Here we need to find how many times does the child swing through the swing's equilibrium position during the course of 3 period(s) of motion.

For 1 period = 2 times

For 3 periods = 3 x For 1 period

For 3 periods = 3 x 2 times

For 3 periods = 6 times

The child swing through the swing's equilibrium position 6 times during the course of 3 periods.

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Nanotechnology is proving ineffective at helping clean up PCB’s. True orFalse
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