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3 years ago

When you hold a cold glass of water in your warm hand, which way does the heat flow ?

Physics

1 answer:

Tanya [424]3 years ago

6 0

Heat flows naturally from a warmer object (higher energy) to a cooler one (lower energy).

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The same force that causes a pop fly to smack into your baseball mitt keeps the Moon in its orbit around Earth. Agree Disagree E

Mademuasel [1]

Answer:

I agreed because, gravity keeps the moon in orbit and causes a pop fly to smack into your baseball mitt.

Explanation:

yes.

7 0

2 years ago

Question 17

9966 [12]

The first one 76 i think that is it

3 0

2 years ago

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed

mafiozo [28]

Answer:

0.6375 m/s

Explanation:

Let x be the distance of the man from the building

from the figure attached

initially the value of x=12

Given:

$\frac{dx}{dt}=-1.7m/s$

where the negative sign depicts that the distance of the man from the building is decreasing.

Now, Let The length of the shadow be = y

we have to calculate $\frac{dy}{dt}$ when x=4

from the similar triangles

we have,

$\frac{2}{12-x}=\frac{y}{12}$

$y=\frac{24}{12-x}$

Differentiating with respect to time 't' we get

$\frac{dy}{dt}=-\frac{24}{12-x}^2\frac{-dx}{dt}$

$\frac{dy}{dt}=\frac{24}{12-x}^2\frac{dx}{dt}$

Now for x = 4, and $\frac{dx}{dt}=-1.7m/s$ we have,

$\frac{dy}{dt}=\frac{24}{12-4}^2\times (-1.7)$

$\frac{dy}{dt}=-0.6375m/s$

here, the negative sign depicts the decrease in length and in the question it is asked the decreasing rate thus, the answer is 0.6375m/s

4 0

3 years ago

Expresa en terminos de la unidad fundamental

Svet_ta [14]

Answer:

imma be honest I dint really know

5 0

3 years ago

Electromagnetic Induction states that moving a magnet through a loop of wire creates which of the following?

alukav5142 [94]

I am pretty sure that electromagnetic Induction states that moving a magnet through a loop of wire creates B. magnetic field. I consider this option to be correct because according to lenz's law conductor moves through loop and to be more exact in this case through a magnetic field. I hope it help!

5 0

3 years ago