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3 years ago

A wooden walkway and a sandy beach are at the same temperature. the sand feels much hotter because it has a greater _____.

1 answer:

6 0

Specific heat capacity.

As it has a greater specific capacity than wood, it takes more heat energy to increase it's temperature by 1 degree Celsius than that of wood. Hence, though both are at the same temperature, sand contains way more heat than wood.

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Which of these would NOT transfer and change electrical energy into another type of energy in a closed circuit? A) fan B) air C)

Nitella [24]

The answer is B) air.

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4 years ago

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Using the rules for significant figures, what do you get when you subtract 15.54 from 508.9538? A. 493 B. 493.4 C. 493.41 D. 493

IceJOKER [234]

You get 493.41 when you subtract 15.54 from 508.953 using the rules for significant figures.

For addition and subtraction, look at the decimal portion (i.e., to the right of the decimal point) of the numbers ONLY. Here is what to do:

1) Count the number of significant figures in the decimal portion of each number in the problem. (The digits to the left of the decimal place are not used to determine the number of decimal places in the final answer.)

2) Add or subtract in the normal fashion.

3) Round the answer to the LEAST number of places in the decimal portion of any number in the problem.

The correct answer between all the choices given is the third choice or letter C. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

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3 years ago

Read 2 more answers

What are the four factors that determine weather?

garik1379 [7]

Solar Radiation, Orbital Distance, Air Pressure, and the Abundance of water.

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3 years ago

Newton's law of cooling states that the rate of change of temperature of an object in a surrounding medium is proportional to th

Nastasia [14]

Answer:

$T = 40 + e^{3.68t} e^{2.99}$

Explanation:

The differential equation for given is given as

$\frac{dT}{dt} = - k(T-T_s)$

integrating above equation we have

ln(T-T_s) = -kt + C

At t = 0 , T(0) = 60

$ln(60- 40) = -k\times 0 + C$

2.99 = C

At t =1 , T(1) = 40.49887

$ln(40.49787 - 40) = -k\times 1 + 2.99$

- k = -3.687

So we have

$T- 40 = e^{3.68t + 2.99}$

$T = 40 + e^{3.68t} e^{2.99}$

4 0

3 years ago

Rhea kicks a soccer ball at 13km/h to Sean after kicking the ball the speed of the soccer ball from Rhea reference frame is 13km

Zinaida [17]

Answer:

Sean is standing still, and Rhea is running toward Sean while kicking the ball.

Note: The question is in complete. The complete question is given below:

Rhea kicks a soccer ball at 13 km/h to Sean. After kicking the ball, the speed of the soccer ball from Rhea's reference frame is 13 km/h. The speed of the soccer ball from Sean's reference frame is 22 km/h. Which conclusion is best supported by the information?

Sean is standing still, and Rhea is running toward Sean while kicking the ball.

Rhea is standing still after kicking the ball, and Sean is running away from Rhea.

Both soccer players are standing still after the ball is kicked.

Both soccer players are running while the ball is in motion.

Explanation:

A reference frame is a position from which something is observed.

Since from the reference frame of Rhea, the ball is moving at a speed of 13 km/h after he kicks the ball at a speed of 13km/h whereas from the frame of reference of Sean, the ball is moving at a speed of 22km/h, there is a difference in the speed of the ball as seen from Rhea's and Sean's frame of reference of about 9 km/h. This difference can only be due to relative motion between the ball and Rhea.

Therefore, the best conclusion supported by the given information is that Sean is standing still, and Rhea is running toward Sean while kicking the ball.

4 0

3 years ago