3 years ago

Happy Gilmore hits a golf ball off a tee at an angle of 25 degrees and a velocity of 98

Physics

1 answer:

Nina [5.8K]3 years ago

5 0

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A piece of Nichrome wire has a radius of 6.5 104 m. It is used in a laboratory to make a heater that uses 4.00 102 W of power wh

Delvig [45]

Answer:

$L=4.8*10^{17}m$

Explanation:

Given data

Power P=4.00×10²W

Radius r=6.5×10⁴m

Voltage V=120V

To find

Length of wire L

Solution

We know that resistance of wire can be obtained from

$P=\frac{V_{2}}{R}\\ R=\frac{V_{2}}{P}$

We also know that R=pL/A solving the length noting that A=πr²

and using p=100×10⁻⁸Ω.m we find that

$L=\frac{RA}{p}\\ L=\frac{\frac{(V^{2})}{P}(\pi r^{2}) }{p} \\L=\frac{V^{2}(\pi r^{2})}{pP}\\ L=\frac{(120V)^{2}\pi (6.5*10^{4} m)^{2} }{100*10^{-8}(4.00*10^{2} W) }\\ L=4.8*10^{17}m$

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3 years ago

a supertanker traveling at 7.2 m/s decelerates to a halt in 12 min. Calculate the magnitud of its average decelaration in meters

Nataliya [291]

Explanation:

Acceleration is change in velocity over change in time.

a = Δv / Δt

a = (0 m/s − 7.2 m/s) / (12 min × 60 s/min)

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Gravity is affected by mass and distance

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galina1969 [7]

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Arisa [49]

When jumping on a trampoline, the energy changes from potential to kinetic energy constantly. when you begin to jump in the air there is kinetic energy present, and when you reach maximum height then potential energy takes over for a little bit. Then, when going back down, kinetic energy takes over again until you land on the trampoline.

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Trey

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4 years ago

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