Recent content by needhelpfast

I have the same problem but with different numbers. When I use the equations you guys are using, though, I keep getting 13.4 kg*m^2, which is not correct. Could you help me? A grinding wheel is initially at rest. A constant external torque of 51.9 N· m is applied to the wheel for 18.8 s...

Yeah I was pretty sure it was 1.65 cm, but apparently that's not right! Let me know if you make any progress! I am going to keep trying

Ball in a Beaker - Diameter - Please Help! Homework Statement A thread attaches a 2.73-g Ping-Pong ball to the bottom of a beaker. When the beaker is filled with water so that the ball is totally submerged, the tension in the thread is 6.75 mN. Determine the diameter of the ball...

Pressure In a Horizontal Pipe - Please Help! Homework Statement The pressure in a section of horizontal pipe with a diameter of 2.40 cm is 143 kPa. Water flows through the pipe at 2.90 L/s. If the pressure at a certain point is to be reduced to 101 kPa by constricting a section of the pipe...

nevermind, got it!

nevermind, got it!

Homework Statement A small solid sphere of mass M0, of radius R0, and of uniform density ρ0 is placed in a large bowl containing water. It floats and the level of the water in the dish is L. Given the information below, determine the possible effects on the water level L, (R-Rises, F-Falls...

Homework Statement Blood is a viscous fluid. If due to plaque, the cross-sectional area of an artery is reduced by a factor 4 over a segment with a length of 1.5 cm, approximately by what factor would the pressure difference between both ends of this segment need to be increased in order to...

Thanks for your help!

Homework Statement Leaving all other quantities unchanged, what happens in the scenarios below? • If you use a cart with half the mass, you cover distance during pushing. • If you push twice as long, you reach final speed. • If you push twice as long, you cover distance during...

so since every equation above contains a vy0 or vxo, that would means that each answer is dependent on the angle?

There is an option that says "depends on the angle."

thank you!

is it false that velocity vectors and acceleration vectors are always perpendicular? because the velocity vector is changing?

Homework Statement Which, if any, of the following statements about a particle in uniform circular motion is/are true? Its acceleration vector is a constant. Its velocity and acceleration vectors are always perpendicular. The direction of its acceleration is toward the center of...