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The force exerted by the wind on the sails of a sailboat is 460 N north. The water exerts a force of 150 N east. If the boat (including its crew) has a mass of 340 kg, what are the magnitude and dir
A potential difference of 80 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a posi
Discuss the relative value, with respect to bodily homeostasis, of immovable, slightly immovable, and freely movable joints
A cube of ice is taken from the freezer at -8.5 degrees celsius and placed in a 95 g aluminum calorimeter filled with 310 g of water at room temperature at 20 degrees celsius. what was the mass of
Judys dietary intake provides 90 grams of protein. Her total energy intake is 2000 kcal. Approximately what percentage of her energy comes from protein
Assume equilibrium conditions and that the rope is inextensible. How does the magnitude of the force exerted by the rope on the car compare to that of the force exerted by the rope on the tree?
A jet plane lands with a velocity of +103 m/s and can accelerate at a maximum rate of -5.02 m/s2 as it comes to rest. From the instant it touches the runway, what is the minimum time needed before
How are the peritubular capillaries are adapted for receiving reabsorbed substances
Identify a malfunction in each of the two major body systems described
A power station with an efficiency of 0.5 generates 10^8 W of electric power and dissipates 1.00 10^8 W of thermal energy to the cooling water that flows through it. Knowing the specific heat of wa
The catabolism of amino acids is usually initiated by deamination. Briefly identify three means (types of enzymes) of deaminating amino acids. Indicate the most common reaction. Suggest why this react
A 1.4 kg object at x = 2.00 m, y = 3.10 m moves at at an angle 45° north of east. Calculate the magnitude of the object's angular momentum about the origin.
the compressed spring is release what is the work done in compressing the spring,what is the speed of the ball the moment it leaves the spring,suppose the ball is launched straight up into the air h
What is the relationship between oxygen production and assimilation of carbon?
A ceiling fan with 90-{rm cm}-diameter blades is turning at 61 rpm. Suppose the fan coasts to a stop 25 s after being turned off. What is the speed of the tip of a blade 10 {rm s} after the fan is
Compare and contrast how different electrolytes - sodium, potassium and chloride function in the body
A 500 g chunk of unknown metal , which has been in boiling water for several minutes, is quickly dropped into an insulating Styrofoam beaker containing 1.00 kg of water at room temperature (20°
A sphere of mass 2.8 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes an angle of 40° with the vertical when at rest. What is the magnitude of th
In many countries, conservationists are trying to design national park systems so that "islands" of natural area (the big parks) are connected by thin "corridors" of undisturbed habitat. The idea is t
A 0.525 {rm kg} ball starts from rest and rolls down a hill with uniform acceleration. How far did it roll the first 7 seconds of motion?
A balloon with a radius of 14 cm and an electric charge of 3.75 × 10-9 C is brought within the electric field of the larger balloon so their centres are 40.0 cm apart. Determine the magnitude
The radius of a proton is 0.9e-15 m; assume that if the particles touch, the distance between their centers will be twice that. What will be the total kinetic energy of both particles an instant bef
Explain how the change in a particular trait occurs in terms of the four postulates. What are the four postulates?
A 1500-kg submarine rises straight up towards the surface. Seawater exerts both an upward buoyant force of 16480 N on the sub, as well as a downward resistive force of 1160 N. What is the submarine'
A driver in a car traveling at a speed of 72 km/h sees a cat 102 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 98 m?