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A current of 0.307 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat and disrupting the flow of blood (and thus oxygen) to your brain. If that curren
A man of mass 71.6 kg is forced to stand on the very end. If the end of the board drops by 5.60 cm because of the man's weight, find the shear modulus of the wood.
An electron is accelerated by a constant electric field of magnitude 290 N/C. (a) Find the acceleration of the electron. (b) Use the equations of motion with constant acceleration to find the electr
On a typical day and at altitudes less than 11km , the temperature at an altitude y is given by T=To-alphaY , where = 12.5C and alpha=(6.00C)/(1000m) Find the altitude y (measured from sea level) a
The coefficient of kinetic and static friction between the stone and the hoizontal ground are .20 and .80, respectively.
A uniform rod of length L and mass m is suspended by two light strings, each of length l. Find the tension in the strings by drawing the FBD for the rod first.
A 2.00 kg block is pushed against a spring with negligible mass and force constant k = 400 N/m, compressing it 0.220m.
Question: When a person inhales, air moves down the bronchus (windpipe) at 17 cm/s. The average flow speed of the air doubles through a constriction in the bronchus. Assuming incompressible flow, d
A bathysphere used for deep-sea exploration has a radius of 1.52 m and a mass of 1.23 x 104 kg. In order to dive, this submarine takes on mass in the form of sea water.
Calculate the work done by on the particle as it moves along the purple path (OAC).
The rope and pulley have negligible mass and the pulley is frictionless. The coefficient of kinetic friction between the 8.00 kg block and the table top is uk = 0.250. The block are released from es
A 14.1-g bullet is accelerated from rest to a speed of 793 m/s in a rifle barrel of length 66.9 cm. (a) Find the kinetic energy of the bullet as it bullet as it leaves the barrel.
What is the speed of the object when it reaches the point x=5.00 m? What is the instantaneous power at x=5.00 m?
A 500-kg package slides 1.50 m down a long ramp that is inclined at 24.0 degree below the horizontal. The coeficient of kinetic friction between the package and the ramp is uk+0.310. Calculate a) th
You throw a ball vertically upward so that it leaves the ground with velocity 2.49 m/s (a) What is its velocity when it reaches its maximum altitude?
Water is pumped into a storage tank from a well delivering 21.0 gallons of water in 27.0 seconds through a pipe of 1.00 in.2 cross-sectional area. What is the average velocity of the water in the p
The frequency is either 444 or 436 Hz, and the property is the Doppler Effect, Fundamental Frequency, Harmonics, Speed of Sound in Air. (I think it's Doppler Effect.)
Water is pumped into a storage tank from a well delivering 15.0 gallons of water in 34.0 seconds through a pipe of 1.00 in.2 cross-sectional area. What is the average velocity of the water in the p
An object weighing 335 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 265 N. Immersed in oil, the object weighs 285 N. (a) Find the density o
A bathysphere used for deep-sea exploration has a radius of 1.50 m and a mass of 1.19 x 104 kg. In order to dive, this submarine takes on mass in the form of sea water.
An empty rubber balloon has a mass of 0.0115 kg. The balloon is filled with helium at a density of 0.181 kg/m3. At this density the balloon is spherical with a radius of 0.400 m. If the filled ball
calculate the following (a) the work done by this force on the particle J (b) the change in the potential energy of the system J (c) the kinetic energy the particle has at x = 4.90 m if its speed is
What is its kinetic energy at this moment? Find the net work done on the object if its velocity changes to (8.00i + 4.00 j) m/s.