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Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; the force which generates the motion is located in between the pivot point and the resistance force. The elbow acts as the pivot point, the biceps muscle pulls up on the forearm to move the mass which is held in the hand. Imagine you are holding an object in your hand with your forearm horizontal and your upper arm vertical so your elbow creates a 90° angle. If your biceps attach to your forearm 0.0511 m from the elbow and make an angle of 30.0° with the vertical while a 2.00 kg mass is held in your hand 29.89 cm from the elbow, what force is exerted by the biceps muscle? Ignore the mass of the forearm.
An uncharged 20 F capacitor is connected to a power supply set to 10 V. How much charge flows onto the capacitor plates, how much more charge flows onto the plates
At the end of the first fiscal year, $3,000,000 has been spent on the project. $1,500,000 has been collected from the grantor. Explain how should the grantee's Enterprise Fund statement of cash flows report the cash inflows?
Imagine a spherical planet of radius R and an average density of 5.0*10^3 kg/m3; this is approximately the average density of the Earth. What is the radius of the planet
A motor running at 1500 revs/min has on its shaft three pulleys, of radii 6, 10 and 25 cm, respectively. Find the linear velocity of the outside rim of each pulley
q1. at the point of fission a nucleus with 98 protons is divided into two smaller spheres each with 49 protons and a
A revolving door consists of four rectangular glass slabs,with the long end of each attached to a pole that acts as the rotation axis. Find the rotational inertia of the entire door
Messages reach at random to be sent across a communications link with a information rate of 9600 bps. The link is 70 percent utilized, and the average message length is 1000 octets.
A cylinder of mass M=30 kg and radius R=2m rolls without slipping. What is the acceleration of the center of the cylinder
Although the cross-sectional area of a capillary is much smaller than that of the aorta, there are many capillaries, so their total cross-sectional area is much larger. calculate the total cross-sectional area of the capillaries
a greased pig is at the top of a 3m high frictionless hill moving at a speed of 5m/s. what is the pig's speed when it gets to the bottom of the hill
The resistance of a copper wire of length L meter is 0.1 ohms. If the diameter of the wire is 0.045cm, find out its specific resistance.
When the minimum angle of deviation of a light ray passing through an isosceles triangular prism is 36 degrees and its vertex angle is 40 degrees, The angle of refraction of the light ray in the prism, in degrees
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