Which means for obtaining hydrogen from water would require the most energy??

1 answer:

8 0

I think the correct answer would be to electrolyze water (run an electric current through it) to decompose it into hydrogen and oxygen. Assuming 100% efficiency, it is said that it needs about 40kWh per kilogram of water to fully decompose it.

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A 2-kg ball is thrown at a speed of ____, exhibits 25j of kinetic energy.

bogdanovich [222]

Answer:

A 2-kg ball is thrown at a speed of 5 m/s, exhibits 25 J of kinetic energy.

Explanation:

Given that,

The mass of a ball, m = 2 kg

Kinetic energy of the ball, K = 25 J

We need to find the speed of the ball. The formula for the kinetic energy is given by :

$K=\dfrac{1}{2}mv^2\\\\v=\sqrt{\dfrac{2K}{m}} \\\\v=\sqrt{\dfrac{2\times 25}{2}} \\\\v=5\ m/s$

So,

A 2-kg ball is thrown at a speed of 5 m/s, exhibits 25 J of kinetic energy.

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3 years ago

2. A boy kicks the football of mass 500 g which is initially at rest. It starts moving with a

nikdorinn [45]

Answer:

Below given

Explanation:

constant velocity of 5 m/s. Calculate:

(a) the kinetic energy of the boy

(b) the work done by the boy

[Ans.(a) 6.25 ), (b) 6.25]] can some on show me how the answer

came

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3 years ago

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In figure (10), an experiment is set up to find out which metal is the best conductor of heat. Balls are stuck with wax to rods

Alenkasestr [34]

Answer:

You don't have to take my word on this, but given that there is less wax on A after heating, it sent the most heat into the wax balls therefore it is a better conductor if heat

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A disk between vertebrae in the spine is subjected to a shearing force of 600 N. Find its shear deformation, taking it to have a

Verizon [17]

Answer:

The shear deformation is $\Delta x=3.34\times10^{-6}\ m$ .