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andrey2020 [161]
3 years ago
8

When energy is changed from one form to another, some of the energy is lost to the surroundings as waste thermal energy. The mor

e steps needed to arrive at the desired energy or the more types of energy that are generated, the more energy is wasted.
Which object would likely have the least amount of wasted energy?

A) an electric drill
B) a solar cell
C) a car engine
D) a hydroelectric dam
Physics
2 answers:
Alex3 years ago
8 0

Answer: The correct answer is solar cell.

Explanation:

When energy is changed from one form to another, some of the energy is lost to the surroundings as waste thermal energy.

From the given options,

Electric drill: Electric drill converts the electrical energy into mechanical energy. When the drill break the the object then the mechanical energy is converted into the heat energy.

Car engine: Car engine converts the chemical energy into the thermal energy. This thermal energy gets converted into the mechanical energy. Then, this mechanical energy is used to accelerate the vehicle.

Hydroelectric dam: Here, the potential energy stored in the water at some height is converted into mechanical energy. Then, this mechanical energy is converted into the kinetic energy. Then, finally, this kinetic energy is converted into electrical energy.

In above options, there is a dissipation of energy while one form of energy gets converted into another.

The more steps needed to arrive at the desired energy or the more types of energy that are generated, the more energy is wasted.

Solar cell: The solar cell converts the solar energy into electrical energy.

Therefore, a solar cell have the least amount of wasted energy.

Taya2010 [7]3 years ago
7 0
The answer is B Solar cell just took the test
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Katena32 [7]

Answer:

transparent Prism

Explanation:

The device shown is a prism. It is used to study the refraction of light according with its wavelength as it transverses from a medium (air for example) to another (either glass, fluorite, plastic), and vice versa.

For that reason is also used to separate white light into its spectral wavelength components.

3 0
2 years ago
What is the maximum force that could be applied to anterior cruciate ligament (ACL) if it has a diameter of 4.8 mm and a tensile
vovangra [49]

Answer:

Maximum force, F = 1809.55 N

Explanation:

Given that,

Diameter of the anterior cruciate ligament, d = 4.8 mm

Radius, r = 2.4 mm

The tensile strength of the anterior cruciate ligament, P=100\times 10^6\ N/m^2=10^8\ Pa

We need to find the maximum force that could be applied to anterior cruciate ligament. We know that the unit of tensile strength is Pa. It must be a type of pressure. So,

F=P\times A\\\\F=10^8\times \pi (2.4\times 10^{-3})^2\\\\F=1809.55\ N

So, the maximum force that could be applied to anterior cruciate ligament is 1809.55 N

4 0
3 years ago
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 6.55x10-2 kg/s. The density of the gasoline is 740
klasskru [66]

Answer:

speed = 3.95 m/s

Explanation:

area = π x radius^2

area = π x (2.67 x 10^-3)^2

volume flow rate = area x speed

volume / time = area x speed

density = mass / volume

volume = mass / density

<u>mass / (density x time) = area *speed</u>

mass flow rate = mass / time

<u>mass flow rate / density = area x speed</u>

6.55 x 10^-2 / 740 = pi * (2.67 x 10^-3)^2 * speed

speed =8.8514 x 10-5 /2.2396 x 10-5 m/s

speed = 3.95 m/s

6 0
3 years ago
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maw [93]

Answer:

answer is a pedigree chart :)

Explanation:

5 0
3 years ago
Read 2 more answers
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Helga [31]
1. A broom swishing against the floor
2. a bee buzzing
3. a car engine


hope this helps!
4 0
3 years ago
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