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2 years ago

Can any one please help

Physics

1 answer:

Alenkasestr [34]2 years ago

8 0

Answer:

20meters per second

Explanation:

2000meters/50seconds= 20m/s

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You add 50 mL of water at 20C to 200 mL of water at 70C. What is the most likely final temperature of the mixture?

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100*20 + 200*80 = 300* T
T = 60

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3 years ago

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A 1.50 µF capacitor and a 3.50 µF capacitor are connected in series across a 2.50 V battery. How much charge (in µC) is stored o

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Explanation:

The given data is as follows.

$C_{1} = 1.50 \times 10^{-6} F$

$C_{1} = 3.50 \times 10^{-6} F$

Voltage = 2.50 V

Hence, calculate the equivalence capacitor as follows.

$\frac{1}{C} = \frac{1}{C_{1}} + \frac{1}{C_{2}}$

$\frac{1}{C} = \frac{1}{1.50 \times 10^{-6} F} + \frac{1}{3.50 \times 10^{-6} F}$

= $0.945 \times 10^{-6} F$

C = $1.06 \times 10^{-6} F$

Now, we will calculate the charge across each capacitance as follows.

Q = CV

= $1.06 \times 10^{-6} F \times 2.50 V$

= $2.65 \times 10^{-6} C$

= $2.65 \mu C$

Thus, we can conclude that $2.65 \mu C$ is the charge stored on each given capacitor.

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3 years ago

If the distance between the levers input force and the fulcrum is 8 cm, and the distance between the fulcrum and the output forc

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Answer:

Ideal mechanical advantage of the lever is 3.

Explanation:

Given that,

The distance between the levers input force and the fulcrum is 8 cm, $d_i=8\ cm$

The distance between the fulcrum and the output force is 24 cm, $d_o=24\ cm$

To find,

The ideal mechanical advantage of the lever.

Solution,

The ratio of the distance between the fulcrum and the output force to the distance between the levers input force and the fulcrum is called the ideal mechanical advantage of the lever. It is given by :

$m=\dfrac{d_o}{d_i}$

$m=\dfrac{24}{8}$

m = 3

So, the ideal mechanical advantage of the lever is 3.

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3 years ago

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Answer:

volume of substance of weight of mercury is 13593 kilograms

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2 years ago

Two children of mass 20.0 kg and 30.0 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. If t

s2008m [1.1K]

Answer:

The distance from the pivot point that the small child will sit in order to maintain the balance is 1.8 m

Explanation:

Given;

mass of the bigger child, M = 30 kg

mass of the smaller child, m = 20 kg

distance between the two children, d = 3 m

This information can be represented diagrammatically;

|<------------------------------------------------>|

----------------------------------------------------------------------------

↓ x Δ 3-x ↓

20kg 30kg

x is the distance from the pivot point that the small child will sit in order to maintain the balance

Take moment about the pivot;

Clockwise moment = anticlockwise moment

30(3-x) = 20x

90 -30x = 20x

90 = 20x + 30x

90 = 50x

x = 90 / 50

x = 1.8 m

Therefore, the distance from the pivot point that the small child will sit in order to maintain the balance is 1.8 m

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2 years ago