Recent content by MKM

A person's body is producing energy internally due to metabolic processes. If the body loses more energy than metabolic processes are generating, its temperature will drop. If the drop is severe, it can be life-threatening. Suppose a person is unclothed and energy is being lost via radiation...

Liquid helium is stored at its boiling-point temperature of 4.2 K in a spherical container (r = 0.251 m). The container is a perfect blackbody radiator. The container is surrounded by a spherical shield whose temperature is 72.8 K. A vacuum exists in the space between the container and shield...

I think its W= density .28V x 9.8

A duck is floating on a lake with 28% of its volume beneath the water. What is the average density of the duck? This question seems pretty straight froward I realize ultimately that in order to find the answer the duck density= duck mass/duck V. If it is 28% I am assuming that should equal...

A mercury barometer reads 740 mm on the roof of a building and 760.0 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building. Okay I understand to find the h I use the formula h=patm/densityxg, and P2-Patm=pgh yet I am confused...

Hey thanks I finally found it !

Okay I keep pluging in my numbers for mgh=1/2mvsquared -1/2mvsqaured I get 4.11 and it's wrong am I usign the write formula I am confused about what to get rid of and what I don;t need . I know I don;t need the mass.

okay I have evrything set up but I dont; understnad how to aply the tension formula which I think is T= mv squared/ L. Also when I am looking for the sum of the torques should I just add the tension to the other forces and find Rx and Ry?

wow It's exactly like your second attachment . I actually had the Tension facing outward perpendicular to the support cable but maybe I was wrong.

I think I might have to use the conservation of total mechanical energy and try and find w and I? does that sound right?

This is how I set up my equation Torque sum = -2820N (L/2)sin 138 + T(3/4)L sin 90 - 5910sin138 =0 and I get 6530 ? What I realized later was...

Do you mean the energy? or the velocity it self?

I thought about using the kinematics but I am confused about where to find the mass. SHould I just cancel it out?

In outer space two space modules are joined together by a massless cable. These probes are rotating about their center of mass, which is at the center of the wire, because the modules are identical (see the drawing). In each probe, the cable is connected to a motor, so that the modules can pull...

A bowling ball encounters a 0.760-m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. The translational speed of the ball is 5.64 m/s at the bottom of the rise. Find the...