The Moon is made up of minerals similar to those on Earth, which areA. rilles.
B. lunar breccias.
C. silicates.
D. highlands.

Answers

Answer 1

Answer: Let's look at them in turn until we find the correct answer:

A) Rile is a kind of formation on the moon, but it's not a mineral
B) brecchia is a kind of rock composed of broken minerals. But, lunar breccias would not be similar to those found on earth
C) is the correct answer! it's a mineral containing silica

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What does temperature measure?a. the amount of disorder in a substance
b. the average kinetic energy of molecules
c. the average potential energy of molecules
d. the direction of the moving molecules in a substance

Answers

temperature is somewhat the heat result by the kinetic energy of an object when its whether emit some heat or being produced by a friction with another object. So the answer is (B.) the average kinetic energy of molecule, in a matter or object

Final answer:

Temperature measures the average kinetic energy of molecules in a substance.

Explanation:

The correct answer is b. the average kinetic energy of molecules.

Temperature measures the average kinetic energy of molecules in a substance. When the temperature of a substance increases, the molecules move faster and have more kinetic energy. This is why substances generally expand when heated and contract when cooled.

For example, when you heat water, the temperature increases, and the water molecules move faster, eventually reaching a boiling point where they have enough kinetic energy to break the bonds and escape as steam.

Learn more about temperature measurement here:

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Which factor does not affect the resistance of a material?A. thickness

B. weight

C. length

D. temperature

Answers

Answer: The correct answer is option B.

Explanation:

Resistance is the property of the material which resists the flow of current.

The expression for the resistance is as follows:

$R=(\rho l)/(A)$

Here, $\rho$ is the density of the wire, l is the length of the wire and A is the area of the cross section of the wire.

The resistance of the wire depends on the length of the wire, area of the cross section of the wire and the temperature.

The thicker wire has less resistance. The thinner wire has more resistance.

The longer wire has more resistance in comparison to the shorter wire in length. The resistance of the wire increases with increase in temperature.

The resistance does not depend on the weight of the wire.

Therefore, the correct option is weight.

the best answer is b

How do scientific tests help determine the properties of substances

Answers

It can help determine substances that appear similar but react differently under the same circumstances.

A car is moving in uniform circular motion. If the car's speed were to double to keep the car moving with the same radius, the acceleration wouldincrease by a factor of 2
increase by a factor of 4
decrease by a factor of 2
decrease by a factor of 4

Answers

Answer:

Increase by a factor of 4.

Explanation:

The acceleration of a car moving with speed v in a circle of radius R is given by:

$a=(v^2)/(R).$

Now if we double the speed $v$ in the equation above, it becomes $2v$ . Thus:

$a=(v^2)/(R)\:\: {\rightarrow}\:\: a_n=((2v)^2)/(R)=4(v^2)/(R)=4a.$

Therefore the acceleration is increased by a factor of 4.

250j of chemical energy are stored in the battery. calculate how many joules of kinetic energy will the electric car

Answers

Answer:

To calculate how many joules of kinetic energy an electric car can have using the 250 joules of stored chemical energy from the battery, you'll need to consider the efficiency of the energy conversion from chemical to kinetic energy. Electric cars are not 100% efficient in converting stored energy to kinetic energy due to losses in the system, including in the motor, transmission, and drivetrain.

Let's say the efficiency of the conversion is "η," where η is a value between 0 and 1 (e.g., 0.85 for 85% efficiency). The kinetic energy (KE) the car can have will be:

KE = η * 250 joules

You can calculate the kinetic energy for different efficiency values by substituting η into the formula.

For example, if the efficiency is 85%:

KE = 0.85 * 250 joules = 212.5 joules

So, with an 85% efficiency, the electric car can have approximately 212.5 joules of kinetic energy from the 250 joules of stored chemical energy in the battery. The actual efficiency may vary depending on the specific car and its components.

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