1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nutka1998 [239]
3 years ago
12

Which describes the correct energy conversion when a solar cell is used to light a street lamp?

Physics
2 answers:
Zinaida [17]3 years ago
7 0
I think its A Solar to light
Lady_Fox [76]3 years ago
3 0
I think it's a solar power might seem strange or futuristic but it's already quite common place you might have a solar powered quartz watch on your wrist or solar powered pocket calculator
You might be interested in
A 0.25-kg ball attached to a string is rotating in a horizontal circle of radius 0.5 m twice every second, what is the tension i
Svetradugi [14.3K]

Answer:

T = 19.75 N

Explanation:

given,

mass of ball = 0.25 Kg

radius = 0.5 m

frequency = 2 s⁻¹

tension in the string = ?

angular velocity

ω = 2 π f

ω = 2 π x 2

ω = 12.57 rad/s

tension on the string is equal to the centripetal force

T = m ω² r

T = 0.25 x 12.57² x 0.5

T = 19.75 N

Tension in the string is equal to T = 19.75 N

3 0
3 years ago
A stationary shell is exploded in to three fragments A, B, C of masses in the ratio 1:2:3. A travels
spin [16.1K]

Answer:

20 m/s

Explanation:

If the mass of fragment A is m, then the mass of fragment B is 2m, and the mass of fragment C is 3m.

The velocity of A is 60 m/s at angle 0°.

The velocity of B is 30 m/s at angle 120°.

The velocity of C is v at angle θ.

In the x direction:

Momentum before = momentum after

(m + 2m + 3m) (0) = m (60 cos 0°) + 2m (30 cos 120°) + 3m (v cos θ)

0 = 60m − 30m + 3m v cos θ

0 = 30m + 3m v cos θ

-30m = 3m v cos θ

-10 = v cos θ

In the y direction:

Momentum before = momentum after

(m + 2m + 3m) (0) = m (60 sin 0°) + 2m (30 sin 120°) + 3m (v sin θ)

0 = 0 + 30√3 m + 3m v sin θ

-30√3m = 3m v sin θ

-10√3 = v sin θ

Square the two equations and add together:

(-10)² + (-10√3)² = (v cos θ)² + (v sin θ)²

100 + 300 = v² cos² θ + v² sin² θ

400 = v² (cos² θ + sin² θ)

400 = v²

v = 20

The speed of fragment C is 20 m/s.

7 0
3 years ago
What effect do shiny metals have on radiant energy?
Andreyy89

Answer:

Metals conduct heat and reduce the kinetic energy within the components that need to remain cool

4 0
3 years ago
Read 2 more answers
What statement is true about a spring?
snow_tiger [21]
I think B is the most correct, because logically it's harder to bend a stiffer spring than it is to bend a softer one. Also, I don't think length comes into play. So B.
8 0
3 years ago
Read 2 more answers
What are three types of variables in a controlled experiments?
blsea [12.9K]

The answers to your question are,

Independent, Dependent, and Control.

-Mabel <3

7 0
3 years ago
Other questions:
  • PLZ HELP ME ASAP 30 POINTS
    6·1 answer
  • Plz can somebody explain for me how we do this exercice...thx
    11·1 answer
  • A wave with a short wave length will also have...?
    15·1 answer
  • The electrical resistance of a wire varies directly as its length and inversely as the square of its diameter. a wire with a len
    11·1 answer
  • Why do solid have fixed shape?
    7·2 answers
  • Dose sound travel faster in a warm room or a cold room? explain your answer
    11·1 answer
  • Identify three pollutants released into the air when fossil fuels are burned.
    9·2 answers
  • What is the central idea for stacking rocks vertically to test the effects of forces
    15·1 answer
  • Jxjxjfjfjfknfnfnnfmfgmmmmmmmm(xmpqitexsy.)​
    12·2 answers
  • What is acceleration of a body moving with uniform velocity? (convert 50km/hr into m/s)​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!