Recent content by Byrne

Lose weight (mass) or train? -- effect of losing weight (mass) on power I'm having troubles wrapping my head around this one (I've provided the example from my class notes below): My question -- how does a decrease in the mass of the rider increase his power producing ability by 18 W...

EDIT -- I posted this here because I figured its more of a conceptual problem than a HW problem, but if people see otherwise, feel free to delete the post. I'm having troubles wrapping my head around this one (I've provided the example from my class notes below): My question -- how does a...

Okay, say I have a coiled conductor below where the direction of the magnetic field is indicated in the North direction. +()()()()()- ---> N If I were to place a compass in the following position, what would happen? (a) COMPASS +()()()()()- (b) +()()()()()- COMPASS Okay, so...

Okay, well a node occurs every 0.50 m and an anti-node is 0.25 m from every node...

The roadrunner has escaped the death microwave trap of the coyote and the poor carnivore is left to return the machine to the ACME company. He has picked up the microwave machine, which cannot be turned off, that is emitting a wavelength of 1.0 m, but quickly begins to feel the burn as the...

When light travels from a less optically dense medium to a more optically dense medium, the refracted ray bends toward the normal (i.e. air -> water). The reverse is true when traveling from a less optically dense medium to a more optically dense medium. Now... why is this? Why does a...

Okay, so say one car accelerates for 20 seconds at a speed of 1.35 m/s2 while a second car accelerates for 10 seconds at a speed of 2.70 m/s2. Notice that the second car accelerates twice as quickly, but in half the time. Now my question lies in describing the displacement of these two cars...

A convertible with the top down is heading for a parking garage entrance at a steady 24 km/h. Directly above this entrance is a window washer who accidentally drops her bucket of water off her rising platform. At this time the car was 12 m from the entrance and the platform was traveling up at...

You are standing on the edge of a pool and a person is swimming towards you under the water. Before the person is close enough to reach the critical angle of your line of sight, what would you see?

the image's height? If so, how? I have the formulas, but see no way of making a substitution. If you wanted to know the problem, it states: The focal length of a camera is 35 mm and the radius of the moon is 1.74 x 106 m. Calculate the diameter of the moon's image that appears on the...

I'm sorry guys, I've been trying to plug in these numbers for the last half an hour and cannot get the right answer. You gave me Galileo's formula to use, but I still don't understand how to use it. I'm plugging in the info I do have and am not getting the answer... (200 m/s)

Okay, well the Galilei's forumula is obviously familiar, but as we learned it, its just one of the five acceration formulas. I guess my teacher doesn't care too much for the formal names of formulas. And I'm not kidding about plastic collision. Thanks to both Berislav and dextercoiby for...

Well, only one out of three of the things you mentioned sound familiar to me. I mean, I am taking a high school physics course and we haven't learned anything about plastic collision or Galilei's formula so using those terms doesn't really help me.

I would help if I could... no one seems to ever reply to my questions either. One time I even went as far as scanning my paper with what I had done so far and no one replied.

Okay, here's the problem: A 24 g bullet is fired horizontally, embedding itself in a 10 kg block initally at rest on a horizontal ice surface. The block slides the ice, coming to rest in 2.0 s at a distance of 60 cm from its original position. Assuming that the frictional force stopping the...