Ask question

Ask question

All categories

3 years ago

8

The linear expansivity of metal P is twice that of another metal Q. When these materials are heated through the same temperature

change, their increase in length is the same. Calculate the ratio of the original length of P to Q

1 answer:

Free_Kalibri [48]3 years ago

4 0

Answer:

The answer is 1:2.

You might be interested in

You are a traffic accident investigator. You have arrived at the scene of an accident. Two cars of equal mass (1,000 kg each) we

kumpel [21]

6. Is 50 m/s that’s the answer

4 0

3 years ago

A sample of ancient granite crust is dated using potassium-40. Scientists find that 50% of the potassium-40 has decayed to form

damaskus [11]

The find the approximate age of the granite one must know the half-life of potassium-40. The half-life of an element is the period of time in which half atoms of the same substance changes into the isotope of the element. The isotope of potassium-40 is Argon 40. Potassium-40 has a half-life of approximately 1.3 billion years. The rock is approximately 1.3 billion years old.

3 0

3 years ago

Read 2 more answers

Assume that the pictured magnet is being moved into the solenoid. If the polarity of the magnet is reversed and then moved into

KonstantinChe [14]

Answer:

The direction of induced emf is revered and hence the direction of the induced current.

Explanation:

If the polarity of the magnet is reversed, the direction if the field lines through the solenoid is also reversed, which according to Faraday's law means

$\varepsilon =N\dfrac{d\Phi}{dt} \rightarrow -N\dfrac{d\Phi}{dt}$

in other words, the direction of the magnetic flux is revered, and therefore, the direction of the induced emf is also revered.

Furthermore, according to Ohm's law

$I = \dfrac{\varepsilon}{R}$

which tells us that if the induced emf changes sign <em>(is reversed)</em>

$I = -\dfrac{\varepsilon}{R}$

the direction of the induced current is also reversed.

7 0

3 years ago

What overall charge must a compound have

Vanyuwa [196]

The charge? If you mean valance electrons, the answer is 8. All compounds must be equal to that of a noble gas.

4 0

4 years ago

Ben and Andy each pushed an empty grocery cart. Ben used twice the force, but they both did the same amount of work. Explain how

Julli [10]

Ben is weak and andy is stronger

6 0

3 years ago

Read 2 more answers