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3 years ago

5

Which device converts chemical energy directly into electrical energy?

2 answers:

LUCKY_DIMON [66]3 years ago

7 0

A battery has it's energy stored in form of chemical energy which is active in it's materials, and can be converted into electric energy on demand . electrical energy then flows in form of a current in circuits. The correct answer is A battery.

Molodets [167]3 years ago

4 0

Answer:

A

Explanation:

Name me brainliest plzzzzz

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Stolb23 [73]

The distance is 6+4 which =10 miles. The displacement would be 7.21 miles. This is because you have to use the Pythagorean theorem so a^2 + b^2 = c^2. So 6^2 + 4^2 = 52. Then take the square root and you get 7.21.

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3 years ago

2. If, in the previous question, there is a 15 N kinetic frictional force opposing the motion, how much work is

NeTakaya

Answer:

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I have to write an essay about Quantum Mechanics. I need to know everything about it. Please Help!

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3 years ago

Read 2 more answers

A 12 kg block is released from the top of an incline that is 5.0 m long and makes an angle of 40.0º to the horizontal. A force o

Allushta [10]

Answer:

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Explanation:

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3 years ago

As a stunt for movie two cars are to collide with each other head on. The two cars are initially 125 apart. Car A is heading str

Tema [17]

Answer:

3.39724 seconds

23.0824792352 m, 101.917520765 m

13.58896 m/s

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

The equation of motion will be

$s=ut+\dfrac{1}{2}at^2\\\Rightarrow 125=30\times t+\dfrac{1}{2}\times 4\times t^2\\\Rightarrow 2t^2+30t-125=0\ m$

$t=\frac{5\left(\sqrt{19}-3\right)}{2},\:t=-\frac{5\left(3+\sqrt{19}\right)}{2}\\\Rightarrow t=3.39724, -18.39724$

The time at which the cars collide is 3.39724 seconds

$s=ut+\dfrac{1}{2}at^2\\\Rightarrow s=0\times t+\dfrac{1}{2}\times 4\times 3.39724^2\\\Rightarrow s=23.0824792352\ m$

Car B traveled 23.0824792352 m and Car A traveled 125-23.0824792352 = 101.917520765 m

$v=u+at\\\Rightarrow v=0+4\times 3.39724\\\Rightarrow v=13.58896\ m/s$

The speed of car B is 13.58896 m/s

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3 years ago