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3 years ago

Slove the following equation for v A=v/t

Physics

1 answer:

LenKa [72]3 years ago

7 0

If you meant solve, the answer would be v= A times t

You see, to get rid of an variable on one side, you must do the opposite of what is being done to it, in this case, multiply because division. After this, we must do what we did to one side to the other side. This creates the equation above!

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Use your knowledge of the properties of the different states of matter to determine in which state sound would travel the fastes

Marizza181 [45]

Answer:

Explanation:

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4 years ago

Find the kinetic energy ofan electron that moves at half the speed of light to four significant digits.

Vlad1618 [11]

Answer:

Ke=electron kinetic energy= $10.24*10^{33} J$

Explanation:

The electron has a mass of $9.1*10^{-31} kg$

The speed of light in a vacuum is a universal constant with the value 299 792 458 m / s (186 282,397 miles / s), although it is usually close to $3*10^{8} \frac{m}{s}$

Kinetic energy (K) is the energy associated with bodies that are in motion, depends on the mass and speed of the body and is calculated using the formula:

$K=\frac{1}{2} *m*v^{2}$ Equation(1)

K=kinetic energy (J)

m =mass of the body (kg)

v= speed of the body $(\frac{m}{s} )$

for this problem We replace in the equation (1)

$me=9.1*10^{-31} kg$ = electron mass

$ve=1.5*10^{8} \frac{m}{s}$ =Half the speed of light

=electron speed

We replace in the equation (1) :

$Ke=\frac{1}{2}*me*ve^{2}$

$Ke=\frac{1}{2} *9.1*10^{-31} *(1.5*10^{8} )^{2}$

$Ke=4.55*10^{-31} *(1.5)^{2} *(10^{8} )^{2}$

$Ke=10.24*10^{33} J$

The energy kinetic of the electron is $10.24*10^{33} Joules$

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3 years ago

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malfutka [58]

Answer:

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Explanation:

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3 years ago

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padilas [110]

Answer:

position 3

Explanation:

in position 3 PE is least as height is least

so KE is most as energy is always conserved

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3 years ago

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Irina-Kira [14]

Answer:

(1) t = 4.29 s

(2) h = 58.98 m

(3) v = 20.04 m/s (downward)

(4) h = 0.94 m

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Explanation:

Assumption:

during downward motion, acceleration due to gravity, g is positive. (+g)

during upward motion, acceleration due to gravity, g is negative. (-g)

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final velocity of the ball, v = 0

time of flight is given by;

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gt = u

t = u / g

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(2)

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h = v²/2g

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h = 58.98 m

(3)

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time of motion, t = 4.8s

final velocity, v = ?

v = u + gt

v = 27 + (-9.8 x 4.8)

v = 27 - 47.04

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(4)

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final velocity of the lizard at maximum height, v = 0

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(5)

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height of the bridge, h = 18 m

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3 0

3 years ago