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faust18 [17]
3 years ago
9

Which of the following helps reduce the flow of thermal energy from within your house to the outside?

Chemistry
1 answer:
NARA [144]3 years ago
7 0

Should be B. It is talking about reducing thermal energy from transferring, so insulation is the only thing that helps. High efficiency appliances saves you electricity, and C is talking about renewable energy.

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What is the work done when a force of 5 N is applied to a ball and it moves 8000 cm?
kolezko [41]

Answer:

Explanation:Given;

applied force, F = 8000 N

time of force application, t = 15 s

Work done is given as the product of force and displacement. Since the car is unable to move, then the displacement is zero and the work done is zero.

Work done = Force x displacement

Work done = 8000 N x 0

Work done = 0

Therefore, the work done is zero.

3 0
3 years ago
Which of the following chemical formulas shows a covalent compound? A.CO2 B.MgO C. NaCl D.HBr
gogolik [260]
A...because both of them(carbon and oxygen)are nonmetal
5 0
4 years ago
Read 2 more answers
How many joules of heat are needed to raise the temperature of 47.5 g of aluminum from 21°C to 94°C , if the specific heat of al
Montano1993 [528]

Answer:

3120.75J

Explanation:

So, we have the formula q = mc\Delta t. For this example, q is the heat energy in Joules, m is the mass in grams, c is the specific heat capacity in \frac{J}{{g\°C}}, and \Deltat is the change in temperature. In this case, m = 47.5g, c = 0.9  \frac{J}{{g\°C}}, and \Deltat  = 94-21 = 73°C. Plugging in the values, we get the joules of heat required to raise 47.5g of Al from 21°C to 94°C which is stated above. You can double check my answer but that should be it. An important thing to be aware of are the units. Sometimes, the heat capacity may not be \frac{J}{{g\°C}}. I may be in Kelvin or something. Anyways, hope this helps.

5 0
4 years ago
Balance this equation-<br> _P4 + _02 --&gt; _P203
ikadub [295]

Answer:

Explanation:

If you insist on filling in the first blank you can put a one.

3 0
3 years ago
In order to digest food, the human body requires ​
ella [17]

Most substances in the food we eat need further digestion and must travel into the intestine before being absorbed. ... Chyme is then squirted down into the small intestine, where digestion of food continues so the body can absorb the nutrients into the bloodstream.

Hopes this helps:)

5 0
4 years ago
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