Recent content by Kdawg

I missed a day of class the other day so I don't have any notes on how to do this. If someone could please give me some tips or a site that helps explain how to do problems like these it would be greatly appriciated. Violet light falls on two slits separated by 1.92 10-5 m. A first-order...

I have a few mirror questions. I missed class and didnt get the formulas to do these. If some one could help me out it would be appriciated. The formulas I have in my notes are 1/f = 1/do + 1/di and hi = (ho * di) / do. I don't think I have enough info to use these formulas and I am guessinf...

Need some help with this question. I think I know how to do it but I don't know the speed of sound. Could someone let me know what it is? A rifle is fired in a valley with parallel vertical walls. The echo from one wall is heard 6.0 s after the rifle was fired. The echo from the other wall is...

Could someone help me with the set up of these problems? 1.)A hockey puck, mass 0.120 kg, moving at 30.0 m/s, strikes an octopus thrown on the ice by a fan. The octopus has a mass of 0.275 kg. The puck and octopus slide off together. Find their velocity. 2.)A 0.21-kg ball is placed on a...

I was wondering what the formula was?

How would I calculate this A horizontal force of 809 N is needed to drag a crate across a horizontal floor with a constant speed. Pete drags the crate using a rope held at an angle of 33°. What force does Pete exert on the rope?

thank you, I just needed that little hint

lol, duh F=ma

A woman at an airport is pulling her 24.0 kg by a strap at an angle of 22 ° above the horizontal as shown in figure Fig. P5.44. She pulls on the strap with a 45.0 N force, and friction is negligible. How would you find acceleration in this problem, there doesn't seem to be enough info but I...

This can't be that hard

No one knows this? I really need to do this soon.

You are pushing a wooden crate across the floor at constant speed.You decide to turn the crate on end, reducing by half the surface area in contact with the floor. In the new orientation, to push the same crate across the same floor with the same speed, the force that you apply must be what...

I first converted calculated the Force Weight because the answer needs to be in Newtons. Then I put a pivoit on the side closest to the window washer and balanced the forces. (754.6 * 1.7) + (666.4 * 3.05) = 6.1x 543.5 = x Then I subtracted that from the...

A scaffold of mass 68 kg and length 6.1 m is supported in a horizontal position by one vertical cable at each end. A window washer of mass 77 kg stands at a point 1.7 m from one end. What is the tension in the cable closer to the painter? What is the tension in the cable further from the...

An archer stands 42.0 m from the target. If the arrow is shot horizontally with a velocity of 95.0 m/s, how far above the bull's-eye must he aim to compensate for gravity pulling his arrow downward? A beach ball, moving with a speed of +1.30 m/s rolls off a pier and hits the water 0.73 m from...