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3 years ago

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The linear expansivity of a metal p Is twice that of metal q. When these metals are heated through the same temperature, their i

ncrease in length is the same. Calculate the ratio of the original length of p to that of q

1 answer:

Sidana [21]3 years ago

4 0

Answer:0-------0

do we have options?

Explanation:

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A spring is hung vertically with a 425g mass attached to it. The mass is at rest. If the mass causes the spring to stretch 0.67

ivann1987 [24]

Answer:

6.22 N/m

Explanation:

F=xk Making k the subject of the formula then

$k=\frac {F}{x}$

But since the applied force F is mg then we substitute mg with F is the formula hence

$k=\frac {mg}{x}$

Converting the given mass from g to Kg, we divide it by 1000 hence m= 0.425 and taking g as 9.81 and substituting x with 0.67 m then

$k=\frac {0.425\times 9.81}{0.67 m}=6.222761194\ N/m\approx 6.22\ N/m$

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3 years ago

Which of these shows the position of the Sun, Moon, and Earth when a full moon phase occurs? (8.7B)

Anvisha [2.4K]

Answer:

Lunar eclipse

Explanation:

Lunar eclipse occurs when Earth comes in between sun and Moon. The moon is either partially or fully blocked and the moon sighting appears to be black from earth since the light rays coming from sun are blocked by Earth. Lunar eclipse occurs only at full moon. The moon is aligned with the position of earth and sun so that they all form a straight line.

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3 years ago

A book lying on your desk will only move if:

liq [111]

Answer:

A frictional force acts on it

8 0

3 years ago

Read 2 more answers

Since this object is traveling at terminal velocity, what must be the value of Fd? (HINT: how to the lengths of both arrows comp

Juli2301 [7.4K]

The magnitude of the air drag when the object is traveling at terminal velocity is C. 850 Newtons

Explanation:

There are only two forces acting on the object here:

- The force of gravity, of magnitude $F_g = 850 N$ , acting downward

- The air drag, $F_d$ , acting upward

Therefore, the equation of motion for the object is

$F_g - F_d = ma$

where m is the mass of the object and a its acceleration.

The object in this problem is traveling at terminal velocity: this means that the acceleration is zero, so

a = 0

Therefore the equation becomes

$F_d = F_g$

which means that the magnitude of the air resistance is equal to the magnitude of the force of gravity:

$F_d = 850 N$

Learn more about acceleration and Newton laws of motion here:

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#LearnwithBrainly

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4 years ago

Which example best demonstrates how unbalanced forces change the speed of an object's motion?

exis [7]

I don’t see a picture but unbalanced forces could be two boys pushing with a combined force of 400 Newton’s but the surface of what the box is laying on being 600 meaning since the ground is creating a higher force in the form of friction it will slow the boys down. When forces are unbalanced it means that the object can not be still or moving at a constant speed when one force is greater by a significant amount the object either slows quickly or accelerates fast depending on which factor is greater.

4 0

3 years ago