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Ulleksa [173]
2 years ago
10

A proton initially has V=4.0 i -2.0 j +3.0 k and then 4 seconds later has v= -2.0 i -2.0 j +5.0 k (in meters per second).A) For

that 4 seconds, what is the protons average acceleration in unit vector notationB) What is the proton's average acceleration in magnitude and find the angle between the average acceleration vector and the positive direction of the x-axis?
Physics
1 answer:
Dafna1 [17]2 years ago
5 0

Answer:

Explanation:

\overrightarrow{u}=4\widehat{i}-2\widehat{j}+3\widehat{k}

\overrightarrow{v}=-2\widehat{i}-2\widehat{j}+5\widehat{k}

time, t = 4 s

(a) Acceleration is defined as the rate of change of velocity.

\overrightarrow{a}=\frac{\overrightarrow{v}-\overrightarrow{u}}{t}

\overrightarrow{a}=\frac{-2\widehat{i}-2\widehat{j}+5\widehat{k}-4\widehat{i}+2\widehat{j}-3\widehat{k}}{4}

\overrightarrow{a}=-1.5\widehat{j}+0.5\widehat{k}

(b) Magnitude of acceleration is

a = \sqrt{(-1.5)^{2}+(0.5)^{2}}

a = 1.58 m/s²

It is parallel to x axis.

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2 years ago
The variation in the pressure of helium gas, measured from its equilibrium value, is given by ΔP = 2.9 × 10−5 cos (6.20x − 3 000
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Answer:

The wavelength of this wave is 1.01 meters.

Explanation:

The variation in the pressure of helium gas, measured from its equilibrium value, is given by :

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The general equation is given by :

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On comparing equation (1) and (2) :

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Since, k=\dfrac{2\pi}{\lambda}

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6 0
3 years ago
If the Sun suddenly went dark, we would not know it until its light stopped arriving on Earth. How long would that be, in second
Gre4nikov [31]

Answer: 500 s

Explanation:

Speed v is defined as a relation between the distance d and time t:

v=\frac{d}{t}

Where:

v=3(10)^{8}m/s is the speed of light in vacuum

d=1.5(10)^{11}m is the distance between the Earth and Sun

t is the time it takes to the light to travel the distance d

Isolating t:

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t=\frac{1.5(10)^{11}m}{3(10)^{8}m/s}

Finally:

t=500 s

5 0
2 years ago
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Explanation:hope tht gave u a clue have a wonderful Christmas Eve time with your family!❄️

3 0
2 years ago
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