Recent content by jahrollins

From those two, I came out with vi2 = vf2?

In mava = v(mball +mblock) why would the final velocity be the same for both the ball and the block?

Homework Statement A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest. It swings downward and strikes a block initially at rest on a horizontal frictionless surface. Air resistance is negligible...

Alright so since sin2Θ + cos2Θ = 1 then... For y: 0.15sinΘa - 0.25sinΘb = 0 15sinΘa = 25sinΘb 225sin2Θa = 625sin2Θb For x 0.15cosΘa + 0.25cosΘb = 0.25 15cosΘa = 25 - 25cosΘb 225cos2Θa = (25 - 25cosΘb)2 225cos2Θa = 625 - 1250cosΘb +625cos2Θb Add together: 225 = 625 - 1250cosΘb +...

Homework Statement Two hockey pucks collide with each other. Puck 1 has a mass of 0.050 kg and an initial velocity of 5 m/s in the x direction. It collides with puck 2 which is initially at rest and has a mass of 0.10 kg. The collision isn't head-on. After the collision, Puck 1 flies off in...

So, basically just solve since we have all the values already... W = 240N(cos(20))*8m W = 1800J

Ah, okay. Then since the the frictional force would be opposite the displacement the angle would be 180? That makes it W = (85kg*9.8m/s2 - 240sin20) * 0.200(cos(180))*8m W = -1200 J

Homework Statement 2.40 *102 N force is pulling 85.0 kg refrigerator across a horizontal surface. The force acts at an angle of 20.0 degrees above the surface. The coefficient of kinetic friction is 0.200 and the fridge moves a distance of 8.00 m. Find the the work done by the kinetic...

2. Which occupies the greatest volume: 1 g of ice, 1 g of liquid water, 1g of water vapor? - They are all the same mass, but are they the same volume? 9. What is the common name for dioxygen oxide? Recheck this one and the next~ a. carbon dioxide escapes upon the opening of a soda can.

Recheck your psi to atm conversion.

Yes, the atomic number would be in the subscript(bottom) to the left, and the atomic mass as the superscript(top). For example, carbon-13 would be written as 136C.

Homework Statement A boat is 400 kg and cruising along with a constant speed of 4.0 m/s in a direction 30 degrees north of east. The boat suddenly begins to feel a force from the wind that is 45 degrees north of east and has a magnitude of 100N. After a 10 second period what is the velocity...

Use dimensional analysis. I believe you're trying to find the amount of time it takes for light to travel over 93x10^6 miles, thus converting from miles to minutes.

y1 doesn't equal y2. The ball is being thrown from the building so their displacements will be different.

So all the oxides would be solids? I thought it might be that... but the way the question was presented made me think it would just be one.