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kupik [55]
4 years ago
10

99 POINTS HELP

Physics
2 answers:
Anna71 [15]4 years ago
3 0
"

Hybrids come in various different flavors. In parallel hybrids, the engine and the motor both send power to the wheels; in series hybrids, only the motor powers the wheels, while the engine simply drives the motor like a generator, recharging the batteries. Full hybrids have powerful enough electric motors and batteries to drive the engine independently, while in mild hybrids, the motor is too puny to power the car by itself and simply assists the engine (or allows it to switch off when the car is idle in traffic). Ordinary hybrids charge up their batteries using power from the engine and energy recovered from the regenerative brakes (which we'll come onto in a moment); plugin hybrids can also be "refueled" from a charging station or domestic power supply, have much bigger batteries, and can be driven by the motor and batteries alone, so work more like conventional electric cars.

Whatever the coupling of engine and motor, the basic idea is to combine the best of both worlds to boost fuel economy. The big drawback of a hybrid is that its around 20–30 percent more expensive than a comparable gasoline model. It's likely to be 10 percent heavier (despite its lighter engine, it has an electric motor, batteries, regenerative brakes, and all the rest) and have more sluggish performance. But hybrids score far better on both safety and fuel economy than gasoline cars, which makes them popular with eco-conscious families who prize their green credentials." - http://www.explainthatstuff.com/electriccars.html I hope this helps!



julia-pushkina [17]4 years ago
3 0
A hybrid vehicle has components from both gas-powered and electric car. it has a gas engine and an electric motor. the exact way the two different engines drive the vehicle vary with different models.
 
Other components of gas-powered car present include transmission and steering. But the braking system is usually similar to an electric car which is regenerative to recover the mechanical energy. The energy is stored in batteries just like an electric car.

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Angelina_Jolie [31]

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That's because the specific geat of water is greater than the specific geat of cooper.

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Read 2 more answers
A person who weighs 800N on the earth's surface will weigh 200N at what height above the earth
Marina86 [1]

Answer: 6,400 km

Explanation:

The weight of a person is given by:

W=mg

where m is the mass of the person and g is the acceleration due to gravity. While the mass does not depend on the height above the surface, the value of g does, following the formula:

g=\frac{GM}{r^2}

where

G is the gravitational constant

M is the Earth's mass

r is the distance of the person from the Earth's center


The problem says that the person weighs 800 N at the Earth's surface, so when r=R (Earth's radius):

800 N= W=mg=m \frac{GM}{R^2} (1)

Now we want to find the height h above the surface at which the weight of the man is 200 N:

200 N = W' = mg' = m \frac{GM}{(R+h)^2} (2)

If we divide eq.(1) by eq.(2), we get

\frac{800 N}{200 N}=\frac{W}{W'}=\frac{(R+h)^2}{R^2}

4=\frac{(R+h)^2}{R^2}

By solving the equation, we find:

4R^2 = (R+h)^2=R^2+2Rh+h^2\\h^2 +2Rh-3R^2 =0

which has two solutions:

h=-3R --> negative solution, we can ignore it

h=R --> this is our solution

Since the Earth's radius is R=6.4\cdot 10^6 m, the person should be at h=R=6.4\cdot 10^6 m=6400 km above Earth's surface.

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4 years ago
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DedPeter [7]

Answer:

D. make a model

Explanation:

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3 years ago
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