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fredd [130]
3 years ago
10

How much electrical is use by a 350 W television that is operating for 25 minutes

Physics
2 answers:
Komok [63]3 years ago
7 0

350Js^¹- *25*60s=525000J

Luda [366]3 years ago
7 0

Answer:

525,000MJ

Explanation:

Power= Energy/ time

Unit of power is watts

1 watt= 1J/s

E= 350J/s × 25mins ×( 60seconds/1minute)

E= 525,000MJ

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A box has a weight of 150 N and is being pulled across a horizontal floor by a force that has a magnitude of 110 N. The pulling
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Answer:

42.99°

Explanation:

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According to question

\frac{F_h}{F_{\theta}}=\frac{2}{1}\\\Rightarrow \frac{\muN_h}{\muN_{\theta}}=2\\\Rightarrow \frac{N_h}{N_{\theta}}=2\\\Rightarrow N_{\theta}=\frac{N_h}{2}\\\Rightarrow N_{\theta}=\frac{150}{2}\\\Rightarrow N_{\theta}=75\ N

Applying Newton's second law in the vertical direction we get

N_h-Nsin\theta=N_{\theta}\\\Rightarrow 150-110sin\theta=75\\\Rightarrow \theta=sin^{-1}\frac{75}{110}\\\Rightarrow \theta=42.99\ ^{\circ}

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