The device or instrument that transforms light energy to electrical energy

If the latent heat of fusion of ice is 334kj/kg and the specific heat of water is 4.18kj kg-1 k-1 how much heat, in joules, must

lord [1]

The answer is 500 because it is

4 0

3 years ago

Heat would best be transferred by conduction between A) a candle and the air. B) an oven and a glass dish. C) a stove and a copp

postnew [5]

Answer: Option (C) is the correct answer.

Explanation:

Conduction is a process where transfer of heat occurs when two objects of different temperature are held next to each other. Heat gets transferred from hot substance to cool substance.

For example, when a copper pot is placed over a stove then heat transfers from stove to the copper pot.

Thus, we can conclude that heat would best be transferred by conduction between a stove and a copper pot.

6 0

3 years ago

A man can throw a ball a maximum horizontal distance of 56.1523 m. The acceleration of gravity is 9.8 m/s 2 . How far can he thr

IceJOKER [234]

Answer:

hmax= 28.2 m

Explanation:

Horizontal movement:

For the horizontal movement, as once released, nothing exerts any influence on the ball in the horizontal direction, it will keep moving at a constant speed, so, the equation for the horizontal displacement is as follows:

x = v₀*t = 56.1523 m

Vertical movement:

For the vertical movement, once thrown upward, the ball is under the sole influence of gravity, g, which causes the ball to accelerate downward, and which magnitude is 9.8 m/s².
At any time, applying the definition of acceleration, we can find the value of the velocity, as follows:

$vf = vo-g*t$

When the ball reaches to the maximum height, the ball will come momentarily at rest, so vf =0.
At this point, we can find the time at which the ball reached to its highest point, as follows:

$t = \frac{vo}{g}$

In the same way, we can find the maximum height reached by the ball, just replacing this value of time in the equation for the displacement, in the vertical direction, as follows:

$h = vo*t -\frac{1}{2} *g*t^{2}$

$hmax = vo*(\frac{vo}{g}) -\frac{1}{2} *g*(\frac{vo}{g} )^{2} =\frac{vo^{2}}{2*g}$

Now, returning to the horizontal movement, as the time must be the same for both movements, we can replace the value for time we have just found, in the equation for the horizontal displacement:

$x = v0x * t = v0x* \frac{voy}{g}$

But as we know that vox = voy, we can rewrite the equation above as follows:

$x = v0* t = v0* \frac{vo}{g} =\frac{vo^{2} }{g} = 56.1523 m$

We can solve for v₀, as follows:

$vo = \sqrt{56.1523 m *9.8 m/s2} =23.5 m/s$

Now, we can replace this value in the expression for hmax, as follows:
$hmax = \frac{vo^{2}}{2*g} =\frac{(23.5m/s)^{2}}{2*9.8 m/s2} = 28.2 m$

4 0

3 years ago

The unit of force, Newton is a derived unit. (give reasons)

vitfil [10]

Answer:

$\boxed{ \sf{see \: below}}$

Explanation

The unit of force, Newton is a derived unit because it depends on three fundamental units. i.e kilogram , meter and second.

Hope I helped!

Best regards! :D

6 0

3 years ago

In the diagram below, a 5 kg box is pushed from rest by an applied force of 15N for 22 seconds. What was the impulse caused by t

Yakvenalex [24]

Answer:

330Ns

Explanation:

Given parameters:

Mass of the box = 5kg

Initial velocity = 0m/s

Force applied = 15N

Time = 22s

Unknown:

Impulse = ?

Final momentum = ?

Solution:

The impulse of the box can be determined using the expression below:

Impulse = Force x time

Impulse = 15 x 22 = 330Ns

The final momentum is the same as this impulse

The impulse and the final momentum is 330Ns

4 0

3 years ago

The device or instrument that transforms light energy to electrical energy​

The device or instrument that transforms light energy to electrical energy