3 years ago

Is it possible to add three vectors of equal magnitude but a different direction to get a null vector?

1 answer:

5 0

Answer:

Yes, it is possible to add three vectors of equal magnitudes and get zero. This can happen if the resultant of the two vectors are equal and opposite in direction to the third vector.

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If a stone with an original velocity of 0 is falling from a ledge and takes 8 seconds to hit the ground, what is the final veloc

sergey [27]

I believe the answer is C - 78.4 m/s.

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2 years ago

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Discuss the formation of thunderstorms and tornadoes

mestny [16]

There diffrent but can cause the same thing

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2 years ago

Find the least frequency of incident light that will knock electrons out of the surface of a metal with a work function of 3eV.

mixer [17]

Answer:

The frequency must be: $725\,\,10^{12} \,Hz$

Explanation:

If the work function of the metal ( $\phi$ ) is 3 eV, then we can use the formula for the kinetic energy of an ejected electron:

$KE= h*f-\phi$

considering for the minimum KE = 0, and using the Plank constant h in eV s as: 4.14 * 10 ^(-15) eV s, to solve for the frequency:

$h*f=\phi\\4.14*10^{-15} * f = 3\\f=3*10^{15} /4.14\,\,\frac{1}{s} \\f=725\,10^{12} \,Hz$

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2 years ago

In which of the following is the speed of sound maximum?<br> Helium<br> Air<br> Aluminium<br> Water

Viefleur [7K]

Answer:

in Aluminum cause sound passes faster than in solid than in liquid and gas

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3 years ago

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To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 14 cm in diameter and 60 cm in length. You woul

OLEGan [10]

Answer:

23.9Km

Explanation:

The following data are given

diameter, d =14cm =0.14m

r=d/2=0.07m

length,l=60cm

current,i=2.2A

magnetic field of 2.5kG we convert to telsa

$1 Gauss=10^{-4}T\\hence \\2500G=2500*10^{-4}\\0.25T$

First we determine the total number of turns from

$B=\frac{U_{0}NI}{h}\\U_{0}=4\pi *10^{-7}\\N=\frac{Bh}{U_{0}*I} \\N=\frac{0.25*0.6}{4\pi *10^{-7}*2.2}\\ N=54257 turns\\$

Sine it is circular, the length of the wire is

$L=N*2\pi r\\L=54257*2\pi *0.07\\L=23864\\L=23.9Km$

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2 years ago