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3 years ago

Which of the following actions will always decrease voltage?

Physics

2 answers:

Bad White [126]3 years ago

7 0

Answer:

D. Increasing resistance and keeping current from A P E X :))

Explanation:

Sindrei [870]3 years ago

3 0

Answer: D

Explanation:

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Determine the centripetal force upon a 40-kg child who makes 10 revolution around the cliffhanger in 29.3 seconds.the radius of

zysi [14]

Answer:

The centripetal force acting on the child is 39400.56 N.

Explanation:

Given:

Mass of the child is, $m=40\ kg$

Radius of the barrel is, $R=2.90\ m$

Number of revolutions are, $n =10$

Time taken for 10 revolutions is, $t=29.3\ s$

Therefore, the time period of the child is given as:

$T=\frac{n}{t}=\frac{10}{29.3}=0.341\ s$

Now, angular velocity is related to time period as:

$\omega=\frac{2\pi}{T}=\frac{2\pi}{0.341}=18.43\ rad/s$

Now, centripetal force acting on the child is given as:

$F_{c}=m\omega^2 R\\F_{c}=40\times (18.43)^2\times 2.90\\F_{c}=40\times 339.66\times 2.90\\F_{c}=39400.56\ N$

Therefore, the centripetal force acting on the child is 39400.56 N.

8 0

3 years ago

Is the following sentence true or false trace fossils are not fossils of the animals themselves but are impressions of their act

Mekhanik [1.2K]

Answer:

It is false, many fossils have bones and fur (etc) in them

6 0

4 years ago

The momentum of a 0.1 kg object traveling at 2000 m/s is 20,000 kg·m/s. True or False

Alina [70]

That's false.

The definition of momentum is (mass) x (speed), so they must be multiplied.

"20,000 kg-m/s" has the correct units resulting from multiplication, but the number could only be the result of division.

3 0

3 years ago

benzene c6h6 and toluene c6h5ch3 for ideal solutions. at 35c the vapor pressure of benzene is 160 torr and that of toluene is 50

LuckyWell [14K]

Answer:

mole fraction of toluene 0.53

Explanation:

given data:

vapor pressure of benzene = 160 torr

vapor pressure of toluene = 50 torr

mole of benzene = 3.8 mol

mole of toluene = 5.7 mol

calculate total pressure

here total pressure = mole fraction of toluene x vapour pressure of toluene + mole fraction of benzene x vapor pressure of benzene

mole fraction of toluene $= \frac{5.7}{5.7+3.8}$

mole fraction of Benzene $= \frac{3.8}{5.7+3.8}$

$= \frac{5.7}{( 5.7 + 3.8 )}*50 + \frac{3.8}{5.7 + 3.8}*160$

= 94 torr

we have mole fraction of toluene in vapor phase =\frac{50}{94} =

= 0.53 (ans)

6 0

3 years ago

How many sig figs does 0.009 have?

VLD [36.1K]

There are 6 sig figs

4 0

3 years ago