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dont know what it is please help?

Let Q = heat required to raise water temp Q = 2.3*(4.2 x 10^3)*(55 - 10) Q = 434,700 joules Let Qs = heat given off by stove in 10 minutes Qs = 1 kw * 1000 w/kw * 10 min * 60 sec/min = 600,000 joules Heat loss = Qs - Q = 600,000 - 434,700 = 165,300 joules Hope this helps.

<< How high does it go? (In meters) >> Working formula is Vf^2 - Vo^2 = 2gs where Vf = final velocity = 0 (when ball is at its maximum height) Vo = initial velocity = 17 m/sec (given) g = acceleration due to gravity = 9.8 m/sec^2 (constant) s = maximum height attained by ball Substituting...

The answer actually will depend on what assumptions are made regarding this problem.

Use the law of conservation of energy, i.e. (KE + PE) @ Point A = (KE + PE) @ Point B (1/2)m(3)^2 + mg(15) = (1/2)(m)(Vb)^2 + mg(7) where m = mass of the roller coaster g = acceleration due to gravity = 9.8 m/sec^2 (constant) Vb = velocity of coaster at point B Since "m" appears on both...

First working formula is D1 = VoT + (1/2)gT^2 where D1 = distance that bullet has travelled upward Vo = initial velocity of bullet = 30 m/sec. (given) T = time of travel g = acceleration due to gravity = 9.8 m/sec^2 (constant) Substituting values, D1 = 30T - (1/2)(9.8)T^2 NOTE the negative...

Buying a book(except when it is a required textbook) is more of a personal choice, in my humble opinion. I suggest you go to a book store and browse through various books on electronics. By doing so, I am sure you will come across a book whose explanations/sample problems and other...

<< What is the magnitude of block's acceleration? >> I will ASSUME that the "horizontal force of magnitude 40 N" is directed parallel to the incline. Thus being said, 50 - F = ma where F = frictional force acting on the block m = mass of the block a = acceleration of the block Since F =...

If you analyze the forces acting on the roof, then Frictional force = F = mg(sin Θ) where F = 430 N (given) m = mass of the worker g = acceleration due to gravity = 9.8 m/sec^2 (constant) Θ = 23 degrees (given) Hence, substituting appropriate values in the above equation, 430 = (m)(9.8)(sin...

The number that should be taken off is 9 (Option b). If this number is taken off, then the remaining numbers will have a common difference of 3 between two consecutive ones. Hope this helps.

Your answer is Option "b" in your listed choices.

Your answer is Option "b" in your listed choices.