# Search results

1. ### Domain and image of a function

We recall that Z is the set of all integers. For each i, j in Z, let f(i,j) be the larger of the two integers i and j. Do these remarks define a function? If so, what are the domain and the image? I'm not sure how to do this. I believe that the remarks do define the function. But I don't know...
2. ### I dont understand why this is wrong. can someone me?

ok i got it. thank you sooo much for your help! i really appreciated it! :)
3. ### I dont understand why this is wrong. can someone me?

Mountaineers often use a rope to lower themselves down the face of a cliff (this is called rappelling). They do this with their body nearly horizontal and their feet pushing against the cliff. Suppose that an 82.5 kg climber, who is 1.54 m tall and has a center of gravity 1.3 m from his feet...
4. ### Speed problem

A 10,500kg railroad car travels alone on a level, frictionless track with a constant speed of 15.0 m/s. An additional 5,000kg load is dropped from a tower onto the car. What will then be its new speed? 2. Homework Equations Momentum of conservation: m1i+m2i=(m1+m2)vf 3. The...
5. ### Moment of inertia !

is it 11/16mL^2 then?
6. ### Moment of inertia !

Small blocks, each with mass m, are clamped at the ends and at the center of a rod of length L and negligible mass Compute the moment of inertia of the system about an axis perpendicular to the rod and passing through a point one-fourth of the length from one end. Express your answer in...
7. ### Maximum distance

Ok. so how about: 1/2mv^2= 1/2 kx^2 F= - k x where F= mg = (0.150-) (9.80m/s2) F = 1.47 N 1.47 N= -k ( - 0.050 ) k = 1.47N/0.050m k = 29.4N/m then: v22 = v12 - 2gh, where v1 = 0 and h =- 30 cm = - 0.30m v22 = -...
8. ### Maximum distance

A 0.150-kg frame, when suspended from a coil spring, stretches the spring 0.050 m. A 0.200-kg lump of putty is dropped from rest onto the frame from a height of 30.0 cm. Find the maximum distance the frame moves downward from its initial position in meters. First I found the spring...
9. ### Find the x coordinate of the center of mass of the system of three chocolate blocks

for your x i got .055543. try that and see if it works. I did it how you had it up there and that is what I got. I did this on my homework yesterday and got it right so it should be right. :)