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3 years ago

A temperature of 34 fereheight is equal to blank kelvin

Physics

2 answers:

nikitadnepr [17]3 years ago

6 0

Answer:

T = 274.11 K

Explanation:

As we know that the freezing temperature and boiling temperature in Fereheight scale is given as

$T_f = 32^o F$

$T_b = 212 ^o F$

now we also know that the freezing and boiling temperature in kelvin scale is given as

$T_f = 273 K$

$T_b = 373 K$

now by the linear scale temperature range we know that

$\frac{34 - 32}{212 - 32} = \frac{T - 273}{373 - 273}$

$\frac{2}{180} = \frac{T - 273}{100}$

$T = 274.11 K$

Oksanka [162]3 years ago

5 0

247.11 Kelvin, you have to convert the 34 Fahrenheit to get to the answer that you need.

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"A 0.4 kg mass, attached to the end of a 0.75 m string, is whirled around in a circular horizontal path. If the maximum tension

Nimfa-mama [501]

Answer:

The maximum velocity the mass can have if the string is not to break = 29.05 m/s

Explanation:

The force balance in the mass:

The tension in the string must always be equal to the force keeping the mass in horizontal circular motion.

The force keeping the mass in circular motion is given by

F = mv²/r

m = mass of body = 0.4 kg

v = speed of the body in circular motion

r = radius of the circular motion = 0.75 m

Maximum tension the string can withstand will correspond to the maximum velocity of the body in horizontal circular motion

T = F = mv²/r

450 = (0.4)(v²)/(0.75)

v² = 450×0.75/0.4 = 843.75

v = 29.05 m/s

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2 years ago

Read 2 more answers

Which statement is incorrect when considering gases? 1. Gas molecules are in constant, random motion at room temperature 2. The

vova2212 [387]

Answer:

Explanation:

For gases :

1. The motion of gases molecule is in random manner at the room temperature.

2.The distance between the gas molecule is more and that is why gas can be compress.

3.The attraction force between the gas molecule is negligible or we can say that there is no any force between the gas molecules.that is why gas can be filled in the container.But the motion of the gas molecule does not stop they are still moving inside the container but the space for movement become less.When a gas container heated then the container start to vibrate because the movement of the gas molecule.

So the option 4 is incorrect.

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2 years ago

A 3.0kg mass tied to a string

dem82 [27]

Answer:

$\boxed{\sf Tension \ in \ the \ string \ (T) = 3 \ kN}$

Given:

Mass (m) = 3.0 kg

Uniform speed (v) = 20 m/s

Length of string (r) = 40 cm = 0.4 m

To Find:

Tension in the string (T)

Explanation:

Tension (T) is the string will be equal to centripetal force ( $\sf F_c$ ).

$\boxed{ \bold{ T = F_c = \frac{m {v}^{2} }{r} }}$

Substituting value of m, v & r in the equation:

$\sf \implies T = \frac{3 \times {20}^{2} }{0.4} \\ \\ \sf \implies T = \frac{3 \times 400}{0.4} \\ \\ \sf \implies T =3 \times 1000 \\ \\ \sf \implies T =3000 \: N \\ \\ \sf \implies T =3 \: kN$