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Arte-miy333 [17]
3 years ago
12

how much heat is produced in one hour by an electric iron which draws 2.5ampere when connected to a 100V supply​

Physics
1 answer:
love history [14]3 years ago
6 0

Explanation:

I=2.5 Ampere ; V=100V ;t = 1 hour=60secs

We know Heat = VIt

H=100×2.5×60=15,000J

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A particular baseball pitcher throws a baseball at a speed of 39.1 m/s (about 87.5 mi/hr) toward home plate. We use g = 9.8 m/s2
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There is no acceleration in the horizontal direction (just g in the vertical), so we can use v = d/t, where v is velocity, d is distance and t is time. We can solve for time like so: t = d/v, we can plug in numbers (v is 39.1m/s completely in the horizontal direction, so no need to break it down with sin's and cos's, just plug it in) and we get t = (16.6m)/(39.1 m/s) = 0.42 s. Keep in mind it wouldn't fall far enough vertically to hit home plate (though we don't know the ball's initial height anyway), but would be in the air just above it. Cheers!
6 0
3 years ago
During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between
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Answer:

a. 12.12°

b. 412.04 N

Explanation:

Along vertical axis, the equation can be written as

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Along horizontal axis, the equation can be written as

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(a)/(b) given us

Tan A = (mg - T_1sin12.5) / T_1 cos12.5

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A = 12.12 °

(b) T2 cosA = T1 cos12.5

T2 = 413cos12.5/cos12.12

= 412.04 N

4 0
3 years ago
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Answer:

it's is because the heavier the object is the more it will be pulled down by gravity n the lighter the object the lesser the gravity will pull it down

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The value of the underlined 8 is, hundred billion's. Hope this helped!
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A beaker has a mass of 125g. What is the mass of this beaker in decigrams
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1250 decigrams
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4 0
3 years ago
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