3 years ago

Name three gases in the atmosphere

Physics

2 answers:

igomit [66]3 years ago

6 0

Oxygen
Nitrogen
Carbon Dioxide (:

4vir4ik [10]3 years ago

5 0

Nitrogen, argon, oxygen

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A) At a certain instant, a particle-like object is acted on by a force F = (3.0 N) ihat - (3.0 N) jhat + (9.0 N) khat while the

Paha777 [63]

Answer:

a) Instantaneous rate at which the force does work on the object = -6 W

b) $\texttt{Velocity of object,}\vec{v}=4\hat{j}$

Explanation:

a) Given that

$\vec{F}=3\hat{i}-3\hat{j}$

and

$\vec{v}=-2\hat{i}+4\hat{k}$

Instantaneous rate at which the force does work on the object is called power.

Power is the dot product of force and velocity.

$P=\vec{F}.\vec{v}=(3\hat{i}-3\hat{j}).(-2\hat{i}+4\hat{k})=-6W$

Instantaneous rate at which the force does work on the object = -6 W

b) Here given that $\vec{v}=-a\hat{j}$

Power = -12 W

$P=\vec{F}.\vec{v}=(3\hat{i}-3\hat{j}).a\hat{j}=-12W\\\\-3a=-12\\\\a=4\\\\\vec{v}=4\hat{j}$

$\texttt{Velocity of object,}\vec{v}=4\hat{j}$

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3 years ago

The blocks shown in the pictures below are all made of wood. Which car will move the fastest?

Ne4ueva [31]

Answer:

The one with the less mass

Explanation:

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3 years ago

Help me, please

Mars2501 [29]

Wish I could help you you rock

6 0

2 years ago

Answer fast , is si unit newton/meter square or pascal or both

Readme [11.4K]

Answer:

Both

Explanation:

The S.I. unit of pressure is newton/meter square or pascal as both represent the same dimensional value.

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2 years ago

In California the pacific plate slides past the North American plate. If the pacific plate is moving at a speed of 5 centimeters

RUDIKE [14]

Answer:

2000years

Explanation:

We will either convert the distance to centimeters or speed to meters/second.

Converting distance to centimeters: 100 meters= 100*100centimeters =10000centimeters.

time=distance/speed

t=10000/5=2000 years

5 0

3 years ago