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A 50 W bulb works for 2 hours. Energy used?
E = Pt = 50 × (2×3600) = 360000 J
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Asked 38 days ago|1/26/2026 8:26:03 AM
Updated 38 days ago|1/26/2026 8:45:04 AM
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E = Pt = 50 × (2×3600) = 360000 J
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Added 38 days ago|1/26/2026 8:45:04 AM
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Questions asked by the same visitor
A 5 kg block slides 10 m with friction force 20 N. Work done by friction?
Weegy: Friction is a force that is created whenever two surfaces move or try to move across each other. (More)
Question
Updated 38 days ago|1/26/2026 8:38:23 AM
1 Answer/Comment
W = Fd cos(180) = 20(10)(-1) = -200 J
Added 38 days ago|1/26/2026 8:38:21 AM
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A 2 kg object experiences a net force of 10 N. What is its acceleration?
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Updated 38 days ago|1/26/2026 8:37:55 AM
1 Answer/Comment
F = ma
a = F/m = 10/2 = 5 m/s^2
Added 38 days ago|1/26/2026 8:37:55 AM
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A 0.2 kg ball is thrown at 15 m/s. Find momentum.
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Updated 38 days ago|1/26/2026 8:46:09 AM
2 Answers/Comments
p = mv = 0.2 × 15 = 3 kg·m/s
Added 38 days ago|1/26/2026 8:45:53 AM
This answer has been confirmed as correct and helpful.
Momentum = mass × velocity = 0.2 kg × 15 m/s = 3 kg m/s.
Added 38 days ago|1/26/2026 8:46:09 AM
This answer has been confirmed as correct and helpful.
A 2 kg object at 10 m height. Potential energy?
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Updated 38 days ago|1/26/2026 8:45:20 AM
1 Answer/Comment
PE = mgh = 2(9.8)(10) = 196 J
Added 38 days ago|1/26/2026 8:45:20 AM
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A sound wave has intensity 1×10 W/m². Sound level?
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Updated 38 days ago|1/26/2026 8:44:47 AM
1 Answer/Comment
= 10 log10(I/I0) = 10 log10(10^-6 / 10^-12)
= 10 log10(10^6) = 60 dB
Added 38 days ago|1/26/2026 8:44:47 AM
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