Recent content by akatsafa

I'm trying to create error bars on excel for a regression problem, but something is not working right. I tried following my instructor's directions, but I think something is wrong with them. Here is the formula I added to the formula bar: $b$30+$b$31*$a2+sqrt($d$26) b30 and b31 are my...

I used the first site, but I'm still a little confused. If I don't put a density less than one in the space, the buoyant force is the same. I put in 4 and then 10, it showed that the buoyant force was the same, but when I put less than one, it showed a smaller buoyant force. The question that...

I went to the website and changed only the density. It did not affect the buoyant force at all. Thank you. That was a good site!

If two objects are the same shape and have the same dimensions, but one object has a bigger density, does that affect the buoyant force? Will the object with a bigger density have a greater buoyant force? They're both immersed in water. I say no because the buoyant force depends on the...

How do I find the period, amplitude, and frequency from a graph? It doesn't give me any numbers except that the voltage scale is 0.200 volts/division and the time scale is 0.50 milliseconds/division. How do I use these numbers to find the period, amplitude, and frequency?

A pendulum of length 150cm swings with an amplitude of 1.8cm. Its mechanical energy is 6mJ. What is the mechanical energy of the same pendulum when it swings with an amplitude of 4.3cm? The answer is supposed to be in mJ. How do I relate the mechanical energy to what they gave me in the...

I solved it. I found out what I was doing wrong.

The pressure inside a champagne bottle is 5.4 atm higher than the air pressure outside. The neck of the bottle has an inner radius of 0.9cm. What is the frictional force on the cork due to the neck of the bottle? I used the equation F=A*P, but I'm getting 137.41N and that's not right. I...

A stone of weight has specific gravity 2.50. (a) what is the apparent weight of the stone when under water? (b) what is its apparent weight in oil (specific gravity=0.90)? I figured out the density to be 2500, but how do i relate the specific gravity and density to find the apparent weight...

An object hanging in the air causes a scale to read 0.0451kg. When the object was submerged in water, the scale is balanced at 0.0370. I found the object of the weight in air to be 0.442N. The question is to find the apparent weight when submerged in water. How do I find the volume to find...

Should I use 4sin30 as my height?

An object slides down an inclined plane of angle 30 degrees and of incline length 4m. If the initial speed of the object is 5m/s directed down the incline, what is the speed at the bottom? Neglect friction. I used Kinitial+Uinitial=Kfinal+Ufinal. I got 2gh+5^2=v^2, but when I solve for v...

Thank you. I had those equations written down too, but I thought it was a harder question than it really was. Thanks again.

An airline executive decides to economize by reducing the energy, and thus the amount of fuel, required forlong distance flights. He orders the ground crew to remove the paint from the outer surface of each plane. The paint removed from a single plane has mass 100 kg. (a) If the airplane...

I'm setting this problem up, but I'm now stuck. A car is safely negotiating an unbanked circular turn at a speed of 17m/s. The maximum static frictional force act on the tires. Suddenly a wet patch in the road reduces the maximum static friction force by a factor of three. If the car is...