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Veronika [31]
2 years ago
13

When an object is falling and reaches a constant velocity, the net force on the object is ____ and the weight of the object is e

qual to____
A. zero; the mass of the object
B. 10; the speed at which the object is falling
C. 10; acceleration due to gravity
D. Zero; the force of air resistance against the object
Physics
1 answer:
Maslowich2 years ago
5 0

When an object is falling and reaches a constant velocity, the net force on the object is <em>zero</em> (it's not accelerating), and the weight of the object is equal to <em>the force of air resistance against the object</em>.  (choice-D)

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balandron [24]

Answer:

The work done will be "763 J". A further explanation is given below.

Explanation:

The given values are:

Q_1=1000 \ J

Temperature,

T_1=900^{\circ} C

i.e,

    =1173

T_2=5^{\circ}C

i.e.,

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As we know,

⇒  \eta =1-\frac{T_2}{T_1}

On substituting the values, we get

⇒     =1-\frac{278}{1173}

⇒     =\frac{1173-278}{1173}

⇒     =\frac{895}{1173}

⇒     =0.763

then,

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⇒       =0.763\times 1000

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3 years ago
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Carbon dioxide initially at 50 kPa, 400 K, undergoes a process in a closed system until its pressure and temperature are 2 MPa a
mrs_skeptik [129]

Answer:

\Delta S=-0.11\frac{kJ}{kg*K}

Explanation:

Hello,

In this case, we can compute the entropy change by using the following equation containing both pressure and temperature:

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8 0
3 years ago
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vova2212 [387]

The speed of the particle is proportional to = √t

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If work is proportional to time

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Speed is the time rate at which an object is shifting along a path, even as speed is the fee and route of an item's movement. Positioned every other manner, speed is a scalar value, even as pace is a vector.

Velocity (or price, r) is a scalar quantity that measures the gap traveled (d) over the alternate in time (Δt), represented via the equation r = d/Δt.

The Italian physicist Galileo Galilei is credited with being the first to measure speed by considering the gap blanketed and the time it takes. Galileo described pace as the gap covered in line with unit of time.

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8 0
1 year ago
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Answer:

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Explanation:

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