Recent content by blarginsnarf

Homework Statement An electromagnet is able to exert a force of 1.5x10^2 N when lifting an object. The electromagnet has 1000 turns, a current of 1.5A, and a material in the core with a relative magnetic permeability of 2.0 x 10^3. What force will the electromagnet exert if the following...

I'm only in high school physics so this may seem easy to you all XD Homework Statement The motor for an elevator can produce 14kW of power. The elevator has a mass of 1100kg, including its contents. At what constant speed will the elevator rise?Homework Equations P = E / T? Ek = mv^2 / 2 The...

Wow, I never thought of that XD thank you very much!

Thank you!

Homework Statement Well, I have a project in which I have to relate hockey and basketball with physics(I've finished basketball). One of the questions are "How can you improve your hockey skills?". I have to give THREE ideas on how to improve your skills and relate it to physics. At the moment...

Oh my gosh, I just solved it on paper. Thank you so much! You are a legend!

Alright, so 672 + 13600 + 168tf = 14272 + 168tf? :s I don't know tfNext can you tell me what the heat given off by the hot water is (in formula form)? I THINK it's like this: Q = MCT Q = 0.12 x 4.2 x 10 ^ 3 x(tf - 95) Q = -46368 + 504tf How's that? :D

Well according to my textbook, the heat capacity of ice is: 2.1 x 10 ^ 3 So... I did this: What would be the heat absorbed by the ice (in formula form) to bring it first to the melting point: q = mct q = 0.04 x 2.1 x 10 ^ 3 x 8 q = 672 J then melt it: Latent heat formula...

Alright, this is what I got: 1. delta t= 0 - (- 8) delta t = 8 2. delta t = tf - 0 3. delta t = tf - 95 How's that? :S

Homework Statement An ice cube of mass 40g is transferred directly from the freezer where it is at -8 CELSIUS to a cup containing 120g of water at 95 degrees CELSIUS. Calculate the final temperature of water. Ignore any heat transfer to the cup or its surroundings Homework Equations tf = ti +...