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If you are lying down and stand up quickly, you can get dizzy or feel faint. This is because the blood vessels don't have time to expand to compensate for the blood pressure drop. If your brain is 0.4 m higher than your heart when you are standing, how much lower is your blood pressure at your brain than it is at your heart? The density of blood plasma is about 1025 kg/m3 and suppose your maximum (systolic) pressure of the blood at the heart is 116.4 mm of Hg (Note that 120 mm of Hg = 16 kP = 1.6 x 104 N/m2). Since most doctors still use mm of Hg, give your result in those units.
What is momentum of a truck speeding down the highway at a given instant? Discuss how the momentum is changed if the truck loses some of its cargo while maintaining the same velocity.
Four objects are situated along the y axis as follows:a 2.01 kg object is at +2.98 m, a2.90 kg object is at +2.45 m, Where is the center of mass of these objects
A thin uniform rod has a length of 0.550 meter and is rotating in a circle on a frictionless table. The axis of rotation is perpendicular to the length of the rod at one end and is stationary. Estimate what is the mass of the bug
A Doppler blood flow unit emits ultrasound at 5.0MHz. What is thefrequency shift of the ultrasound reflected from blood moving in anartery at a speed of 0.20 m/s?
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, what is the associated uncertainty
A tennis player tosses a tennis ball straight up and then catches it after 1.86s at the same height as the point of release. What is the acceleration of the ball while it is in flight
a bicycle with a 27-in diameter wheels has a chain ring with 52 teeth and a cog with 26 teeth. the cyclist is pedaling
A 4.25 bullet traveling horizontally with a velocity of magnitude 375 is fired into a wooden block with mass 1.10 , initially at rest on a level frictionless surface. The bullet passes by the block and emerges with its speed reduced to 110 .
Water at 20-C flows through a 12-mm-diameter pipe on a downward slope so that Re ¼ 2000. What angle would result in a zero pressure drop?
The cord is then pulled from below, shortening the radius to 1.0 m. The new angular velocity (in rad/s) is
A 350 kg piano slides 3.90 m down a 23 degree incline slope, and is kept from accelerating by a man who is pushing back on it parallel to incline. What is the force completed by the man.
A father pulls his young daughter on a sled with a constantvelocity on a level surface a distance of 10 \rm{m}, how much work does the father do
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