Which car has the greatest efficiency?
The answer to this question depends on a variety of factors, such as the type of car, its engine size, and the type of fuel it uses. Generally speaking, electric cars tend to have the greatest efficiency, followed by hybrid cars.
WHich car has the greatest efficiency?
A 1,200 kg car that travels 20 km per liter of fuel (my answer)
A 900 kg car that travels 20 km per liter of fuel
A 900 kg car that travels 15 km per liter of fuel
A 1,200 kg car that travels 15 km per liter of fuel
Based on the given options, the 1,200 kg car that travels 20 km per liter of fuel has the greatest efficiency. It travels the farthest distance on one liter of fuel compared to the other options.
Why are incandescent light bulbs considered to be lower efficiency than LED bulbs?
A smaller percentage of the energy output of the LED bulb goes toward light
A greater percentage of the energy output of the incandescent bulb goes toward heat
A smaller amount of energy is wasted by the incandescent bulb
A greater amount of energy is required for the same light output from the LED bulb.
A greater percentage of the energy output of the incandescent bulb goes toward heat. Incandescent bulbs produce light by heating a filament until it glows, but this process also produces a lot of heat, which is wasted as energy. In contrast, LED bulbs use a more efficient process that converts almost all of the energy they consume into light, with very little energy wasted as heat. This makes LED bulbs much more efficient and longer-lasting than incandescent bulbs.
What can be done to improve the efficiency of a ramp?
smooth the surface
add a rough surface
insulate the surface with foam
make it shorter and steeper
The efficiency of a ramp can be improved by making it shorter and steeper. A shorter and steeper ramp reduces the distance over which an object has to travel horizontally and thus reduces friction and increases efficiency. Smoothing the surface may also help, as it reduces the roughness that slows down an object as it moves along the ramp. Adding a rough surface or insulating the surface with foam are unlikely to improve efficiency as they will increase friction and decrease the smoothness of the ramp surface.
fulcrum= fixed point about which a lever rotates
Yes, that is correct. A fulcrum is a fixed point or pivot point around which a lever rotates when a force is applied to it. The position of the fulcrum determines how much force is needed to lift an object with the lever.
A pulley system is operating at only 50% efficiency. How could efficiency be increased?
By decreasing the amount of weight being lifted
by reducing the friction on the pulleys
by having a second person pull the rope
by adding more pulleys to the system