Recent content by SelenaT

Homework Statement [/B] If 1.20 grams of salicylic acid is reacted with excess methanol, what mass of ester should you expect to achieve theoretically? Molar masses of.. salicylic acid is 138.13g/mol methanol is 32.05g/mol ester (methyl salicylate) is 152.16g/mol Mole ratio...

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Will remember to add background of the question. "Calculate the force of friction on your car as it rolls across a smooth level surface." Not sure why it says smooth level surface since there was friction between the car and the floor but... This is a follow up question to an experiment we...

Homework Statement Calculate the force of friction on a toy car as it rolls across a flat floor. Given: mass = 0.293kg time = 3.66 s displacement = 8.7Homework Equations Fnet = mass x acceleration displacement = [(velocity1 + velocity2)/2] time velocity2 = velocity1 + acceleration(time)The...

Sorry, forgot to give a little context. I will remember next time. This is a follow up question for an experiment that I did. Using an open-closed air column, I found that the second resonant length was 0.53m

Homework Statement Calculate the room temperature by using the speed of sound formula and using the given values. Known Data: Frequency = 480 Hz 2nd Resonant length = 54cm or 0.54m Homework Equations v = 331 + (0.60)T T = (v - 331)/0.60 v = fλ (Open-Closed air column) L = (3/4)λ The...

Homework Statement A jeweler heats 25g of pure gold until molten. If the initial temperature of the gold is 22 degrees celsius, calculate the amount of energy required for the process. Homework Equations c = 129 Lf= 64 500 Lv = 1578000 Tmelt = 1064 The Attempt at a Solution Q = mct =...

But the speed isn't incorporated in the answer. The question is asking for the power at a certain speed. I believe do something to 20kW to get the answer

Homework Statement **Rollercoaster is being built and the values are the specifications[/B] Determine the power needed to raise the cars to the top of the hill and have them traveling at the wanted speed. Height of hill: 65m Speed at top of hill: 2.5m/s Time to raise cars: 40 seconds Total...

The fact that every object will remain at rest unless acted upon by an unbalanced force (Newton's first law)? But I don't understand. How is the normal reaction between balls not vertical? Isn't it perpendicular to the horizontal surface?

I need to think of all the physics principles to explain how one can stack spherical items (ex. baseballs) on top of each other. So far I've thought of one. 1. Newton's third law In this case, the reaction is the normal force in each baseball that is stacked and the action is the force of...

I was asked to draw a free body diagram to derive the equation tan θ = µs for the following situation: A box sliding down an inclined plane. My FBD has 3 forces - gravitational forces pointing downward (horizontally) <-- longest vector - normal force perpendicular to the box - frictional...