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3 years ago

What is the reason for heat transfer from one substance to another?

Physics

2 answers:

katrin2010 [14]3 years ago

5 0

C difference in temperature

hichkok12 [17]3 years ago

4 0

Answer:

A I think

Explanation:

heated air molecules have a lot if pressure and they try to release that pressure by either expanding or transfering

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What will happen to the mass and volume of a block if their is two blocks, three, blocks or four blocks? For example, if the mas

Crazy boy [7]

To solve this problem, it would be helpful to know the density of 1 block Density is defined as the mass of the substance per volume. From the example given, The density of the block is (7g)/(15.625 units^3) or 0.448 g/units^3. So, if a block is added, the new mass is 7g + 7g = 14 g And the volume 14 g /(density) = 1 unit^3

7 0

3 years ago

12 seconds after starting from rest a frewly falling cantaloupe has a speed of

adoni [48]

Answer:

The cantaloupe has a speed of 117.6 m/s

Explanation:

Free Fall Motion

It occurs when an object falls under the sole influence of gravity. Any object that is being acted upon solely by the force of gravity is said to be in a state of free fall. Free-falling objects do not face air resistance.

If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is $g = 9.8 m/s^2$ .

The final velocity of a free-falling object after a time t is given by:

vf=g.t

The cantaloupe has been dropped from rest. We are required to find the speed after t=12 seconds.

Calculate the final speed:

vf=9.8 * 12 = 117.6 m/s

The cantaloupe has a speed of 117.6 m/s

3 0

3 years ago

How does a car’s average speed differ from its instantaneous speed?

attashe74 [19]

Answer: Instantaneous speed is measured at each particular instant, and average speed is the sum of the instantaneous speeds.

7 0

3 years ago

Read 2 more answers

What is the speed of a cheetah that travels 176.4 meters in 4.5 seconds?

Ugo [173]

Answer:

$\boxed{ \bold{ \boxed{ \sf{39.2 \: m/ {s} \: }}}}$

Explanation:

Given,

Distance travelled ( d ) = 176.4 meters

Time taken ( t ) = 4.5 seconds

Finding the speed of a cheetah

Speed $\sf{ = \frac{distance \: travelled}{time \: taken} }$

$\sf{ = \frac{176.4}{4.5} }$

$\sf{ = 39.2 \: m/ {s} \: }$

------------------------------------------------------------------------

Let's learn about Speed  :

Suppose a body moves 20 m in 2 seconds, either on a curved path or on a straight path. So , 10 m is the distance travelled by the body in each second which can be written as 10 m/s. This is called speed of the body. Thus, Speed is defined as the distance travelled per unit time. It is the rate of distance travelled by a body.

Mathematically,

$\boxed{ \bold{ \sf{speed = \frac{distance \: travelled}{time \: taken} }}}$

In SI system, the unit of distance is metre and time is second. Thus , the SI unit is speed is m/s.

Hope I helped!

Best regards!!

8 0

3 years ago

I WILL GIVE BRANLIEST TO THE BEST ANSWER

azamat

Hi there!

1. Weather is the condition in a day describing humidity, temperature, and rain or sun conditions. It also includes different features, including hail, snow, and storms.

2. Our atmosphere provides the air we need to breath. It also protects us from harmful UV rays from the sun, and it traps heat to ensure that the planet doesn't freeze.

3. We might have storms such as thunderstorms, or gusts of warm air coming our way. This is caused by the warm front.

4. Yes, it is possible that humans and dinosaurs drank the same water. Because of the water cycle and that water on earth never leaves the atmosphere since it is always cycled or recycled, it is possible that the same water, just in different states, have been in the mouth of a dinosuar.

Hope this helps!

4 0

3 years ago