Recent content by kitty9035

Homework Statement A spring that can be considered ideal hangs from a stand. Suppose the spring is used in a spring scale that is limited to a maximum value of 25 N, but you would like to weigh an object of mass M that weighs more than 25 N. YOu must use commonly available equipment and...

No, I really don't. What's right?

Homework Statement Two identical objects A and B of mass M move on a one-dimensional, horizontal air track. Object B initially moves to the right with speed V0. Object A initially moves to the right with speed 3V0, so that it collides with object B. Friction is negligble. Determine the...

Homework Statement Positive charges are situated at three corners of a rectangle, as shown in the attachment. Find the electric field at the fourth corner. the numbers are: bottom left- 3.00 nC bottom right-5.00 nC top right- 6.00 nC the length of the rectangle is .6 m and the width...

Homework Statement The coefficient of static friction between the person and the wall is .61. The radius of the cylinder is 6.56 m. An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that any person inside is held up against the wall when the...

Homework Statement What is the net upward force on an airplane wing of area 20 m2 if the speed of air flow is 300 m/s across the top and 280 m/s across the bottom. Homework Equations The Attempt at a Solution I have a feeling that this is an easy question, but i just don't know...

I solved for the Force by finding the mass and multiplying it by 9.8. Now I'm having trouble finding the velocity

Homework Statement A fountain sends a stream of water 28.8 m up into the air. The acceleration of gravity is 9.8. IF the base of the stream is 4.38 cm in diameter, what power is required to send the water to this height? Homework Equations The Attempt at a Solution I was...

Homework Statement Water is flowing at 1 m/s in a circular pipe. If the diameter of the pipe decreases to four-ninth its former value, what is the velocity fo the water downstream? Homework Equations AV=AV [b]3. The Attempt at a Solution [/b (Area1)(Velocity1)=(Area2)(Velocity2)...

Homework Statement The density of ice is 920 kg/m3, and that of seawater is 1030 kg/m3. What fraction of the total volume of an iceburg is exposed? Homework Equations The Attempt at a Solution I know your supposed to do volume of the ice divided by the volume of the seawater, x...

Thank you! I got the answer:smile:

would it be PV=nRT? I didn't learn about this yet. I just looked it up. What does the n and R stand for?

[b]1. Homework Statement [/b An automobile tire having a temperature of .64 degrees C is filled to a gauge pressure of 27 lb ft/in2. What would be the gauge pressure in the tire when its temperature rises to 39 degrees C? Homework Equations Assume the volume remains constant, the air...

I thought I did that. Is this the right set up? 0+185N(sin-90)(-1.735m) + 747N(sin-90)(-2.735)-3.47T=0

Homework Statement A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 185 N and is 3.47 m long. What is the tension in the rope nearest the 747 N window washer when he stands 1 m from one end? Homework Equations sum of torques =...