4 years ago

How is a light wave likely to react when hitting a shiny opaque object?

Physics

1 answer:

shepuryov [24]4 years ago

6 0

Answer:

Explanation:

The light wave will be reflected

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An electrician reads a resistance of 65 ohms and when energize the circuit runs 1.77 amps. what voltage to the system run on?

Stels [109]

Answer:

115.05 Volts

Explanation:

We can use Ohm's Law!

V=IR

V= 1.77 * 65

V=115.05 Volts

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3 years ago

A car travels 150 meters East of its original starting position in 15s. What is the cars velocity?

Andrew [12]

Answer:

it is 347

Explanation:

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3 years ago

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Suppose a 96.10 kg hiker has ascended to a height of 1841 m above sea level in the process of climbing Mt. Washington. By what p

lbvjy [14]

Answer:

0.029%

Explanation:

Weight on the surface is given by,

$F_W = mg = (96.1Kg)(9.8m/s^2)=941.78N$

The acceleration due to gravity at given height is,

$g_h=\frac{gR^2}{R+h^2}$

The weight in another height is equal to

$F_h=mg_h$

$F_h= m*\frac{gR^2}{R+h^2}$

$F_h = \frac{F_WR^2}{(R+h)^2}$

$F_h=\frac{(941.78)(6.371*10^6)}{(6.371*10^6+1841)}$

$F_h = 941.50N$

The change of the Weight is,

$\frac{F-F_h}{F}*100=\frac{941.78-941.50}{941.78}*100=0.029\%$

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3 years ago

A skydiver jumps out of a plane. How fast would he be falling after 5 seconds? (ignore air resistance)

xxMikexx [17]

Answer:

9.8 times 5?

Explanation:

this is a freefall question so i think that is what it is.

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3 years ago

Why is a steam burn more damaging than a burn from boiling water at the same temperature?

maksim [4K]

The phase change (from gas to liquid) that the steam undergoes right when it touches your skin releases a lot of energy right onto your skin so it burns a ton. The boiling water would just burn you until it reaches the same temperature as your skin.

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3 years ago