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3 years ago

True or false: The quantity represented by theta_0 is a function of time (i.e., is not constant).

Physics

2 answers:

Lapatulllka [165]3 years ago

6 0

It is a measure of an angle

Mumz [18]3 years ago

6 0

It may be constant in some expressions and variable in others.
We don't how you'[re using it.

The same symbol may be used to represent any quantity you want
in any expression you write, as long as you make clear exactly what
it represents.

There's no mystical reason why the Greek letter π must always represent
3.14159... , or why the Greek letter Θ must always represent an angle, or
why the letter 'g' must always represent acceleration due to gravity.

When we see how you've used theta, we can determine whether it's
a constant or a function of time in that expression.

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3 years ago

When hiking at altitude, the air pressure drops to 825,000Pa. Solve the force that site exerts against the side of a rectangular

OLga [1]

Answer:

The force is $1237500N$

Explanation:

We can apply the following expression

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To find the area of rectangular tent wall:

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Now to find the force:

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3 years ago

A cyclist accelerates from a velocity of 10 miles/hour east until reaching a velocity of 20 miles/hour east in 5 seconds. What w

Sliva [168]

Answer:

$a = 0.894\ m/s^2$

Explanation:

<u>Motion with Constant Acceleration</u>

A body moves with constant acceleration when the speed changes uniformly in time. The equation used to find the final speed vf is

$v_f=v_o+at$

Where vo is the initial speed, a is the acceleration, and t is the time.

The cyclist has an initial speed of vo=10 miles/hour and ends up at vf=20 miles/hour in t=5 seconds.

Both speeds are given in miles/hour and we must convert it to m/s:

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3 years ago

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3 years ago

Which process is represented by the PV diagram shown below?

MrMuchimi

Answer: B. the isovolumetric process

Explanation:

In the graph given, the volume is constant throughout. It represents a constant volume process. Such processes are called the isovolumetric process or isochoric process.

<em>Hence, option B is the correct answer.</em>

Option A is incorrect because in an isobaric process, the pressure is constant.

Option C is incorrect because in an isothermal process, the temperature is constant.

Option D is incorrect because in an adiabatic process there is no heat transfer.

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