PHYSICS HIGH SCHOOL

All of the following are examples of ways to improve energy efficiency of heating systems, except _______.A. Closing off rooms that aren’t in use.
B. Frequently cleaning the furnace filter.
C. Fixing cracks in the walls and floor.
D. Opening the front door in winter to filter and clean warm air.

Answers

Answer 1
Answer:

Answer:

D. Opening the front door in winter to filter and clean warm ai

Explanation:

All of the following are examples of ways to improve energy efficiency of heating systems, except _______.

A. Closing off rooms that aren’t in use.

B. Frequently cleaning the furnace filter.

C. Fixing cracks in the walls and floor.

D. Opening the front door in winter to filter and clean warm air

for an heating systems it is better to keep the front door shut so that all the heat energy does not escape outside.

when heat energy is within a closed system ,it can still be utilized to keep the inhabitants warm otherwise there will be an exchange with the cold from winter fall outside the air, and the heating system's efficiency will be reduced

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Some vehicles, like _____, have different rules for registration and renewal. A. trailers B. coupes C. sedans D. pickup trucks

Answers

Some vehicles, like trailers, have different rules for registration and renewal

What is the registration process for trailers?

Before registering a trailer, you will generally need to submit a signed title to verify your ownership. Alternately, you might be able to use a manufacturer’s statement of origin.

You will also need to sign and submit an application for the license and title of the trailer, along with receipts of applicable property taxes. Finally, you will need to pay the registration fees.

Before you make a trip to the DMV, make sure to have two forms of photo ID on hand to verify your identity when you speak with an agent. For example, your driver’s license might serve as the primary form of ID, and a passport could serve as the second.

If you do not have a passport, you could use a military identification card instead. If your only form of photo ID is your driver’s license, be sure to have other forms of identification on hand, such as your birth certificate and the card with your Social Security number.

Hence Some vehicles, like trailers, have different rules for registration and renewal.

To know more about trailers follow

brainly.com/question/4295609

Answer:

trailers

Explanation:

Someone please help on this one?

Answers

so other scientists can see how spread out your data are

A car moving with a velocity of 20 meters/second has1.8 * 105 joules of kinetic energy. What is the mass of the car?

Answers

Kinetic energy is the product of mass and the square of the velocity of the moving object. In this case, we substitute the given data, that is 1.8 x10^5 joules = m * (20 m/s2)^2. Extracting the mass, the mass of the car therefore is equal to 450 kg

Explanation :

Given that,

Velocity of the car, v = 20 m/s

Kinetic energy of the car, E_k=1.8* 10^5\ J

Kinetic energy is given by :

E_k=(1)/(2)mv^2

m=(2E_k)/(v^2)

So, m=(2* 1.8* 10^5\ J )/((20\ m/s)^2)

m = 900 kg

Hence, the mass of the car is 900 kg

If you put a pot on the stove, the pot becomes hot. The heat is transferred to the pot on the burner by radiation. Please select the best answer from the choices provideda. True
b. False

Answers

The answer is False. The example of heat transfer in this problem is not by radiation, but by conduction. This is because the pot is put directly on the surface of the stove, which is what conduction is - direct contact between two surfaces at different temperatures. Radiation, on the other hand, involves heat transfer by electromagnetic waves such as heat from the sun to the Earth.
If you put a pot on the stove, the pot becomes hot. The heat is transferred to the pot on the burner by radiation. the answer is false

If your high power objective is 40x and your eyepiece is 15x, the total magnification is _____x. 55 600 900 100

Answers

40 x 15 = 600 is the answer you want

A 7.5 kg block is placed on a table. If it's bottom surface area is 0.6m2, how much pressure does the block exert on the tabletop? A. 376.5 Pa
B. 73.5 Pa
C. 226.5 Pa
D. 122.5 Pa

Answers

Pressure is defined as the force per unit area. This measurement is more convenient to use for describing a force exerted. The standard unit for pressure is Pascal. For this problem, force is the gravitational pull from the block. Calculations are as follows:

P = F/A where F = mg

F = 7.5 ( 9.81) = 73.6 N

P = 73.6 N / 0.6 m^2 = 122.5 Pa

Thus, the answer is D.

Yeh its D.

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