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3 years ago

15

Where does the energy to turn a flashlight on come from

2 answers:

Ne4ueva [31]3 years ago

8 0

Answer:

Electrical energy is the energy of electricity—electrical charges moving through a conductor. Electricity can be transported through wires to places where it is needed and then converted into other forms. In a flashlight, the electrical energy becomes light energy and thermal energy in the bulb.

Explanation:

Anastasy [175]3 years ago

5 0

Answer:

the battery

Explanation:

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What statements best describe magnets?

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Answer:

they stick together when they get close

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3 years ago

liubo4ka [24]

Answer:

1.9 km

Explanation:

The equation for vertical motion is ...

h(t) = -4.9t^2 +26t +20

This will have a zero near t = 5.988 seconds.*

The horizontal distance traveled in that time is ...

(310 m/s)(5.988 s) ≈ 1856 m ≈ 1.9 km

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4 years ago

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3 years ago

Write 200m and 2 ×10^4m in km<br><br><br>write 5000ms and 5×10^7ms in seconds

WINSTONCH [101]

Answer:

a) 20.2 kilometers

b)50 005 seconds

Explanation:

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3 years ago

A 64.0 kg pole vaulter running at 10.2 m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar i

Lubov Fominskaja [6]

Answer:

h = 5.05 m

Explanation:

given,

mass of pole vaulter, m = 64 Kg

speed of the vaulter,V = 10.2 m/s

horizontal component of velocity in air, v = 1 m/s

height of the jump,h = ?

using energy conservation

$E_i = E_f$

$\dfrac{1}{2}mv_i^2 + m g h_i= \dfrac{1}{2}mv_f^2+m g h_f$

initial height of the vaulter is equal to zero.

$\dfrac{1}{2}v_i^2 = \dfrac{1}{2}v_f^2+gh_f$

$h =\dfrac{v_i^2-v_f^2}{2g}$

$h =\dfrac{10^2-1^2}{2\times 9.8}$

h = 5.05 m

height of the jump is equal to 5.05 m.

4 0

4 years ago