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An adventurous crosses between two rock cliffs by slowly going hand over hand along a rope stretched between the cliffs. He stop to rest at the middle of the rope. The rope will break if the tension in it exceeds 2.50x10^4 N, and our hero's mass is 90.0 kg. a) If the angle 0 is 10.0degree, find the tension of the rope b) What is the smallest value the angle 0 can have if the rope is not to break?
Large conventional electromagnets use water cooling to prevent excessive heating of the magnetic coils. ow many liters of water must circulate by the coils each second if the temperature of the coils is not to exceed 50 degree C
What is the smallest diameter spot the eye can produce on the retina if the pupil diameter is 4.50mm ? Assume light with a wavelength of = 510nm
A sled weighs 100 N. It is held in place on a frictionless 20 degree slope by a rope attached to a stake at the top of the slope; What is the normal force acting on the sled
A standing wave on a string is produced when one end is fixed and the other is driven by a 76 Hz oscillator, what is the total length of the string in meters
A projectile is fired vertically from Earth's surface with an initial speed of 9.6 km/s. Neglecting air drag, how far above the surface of Earth will it go
A cylindrical copper rod of length 1.30 m and radius 1.60 cm is insulated to prevent heat loss through its curved surface. find the rate at which entropy increases for the rod-reservoirs system
A capacitor with parallel circular plates of radius R is discharging via a current of 20.0 A. How much displacement current is encircled by the loop
Testing Tennis Balls Tennis balls are tested by being dropped from a height of 2.5m onto a concrete floor. The 57g ball hits the ground, compresses, How fast is the ball moving just before it hits the floor
A rifle bullet with mass 8.00g strikes and embeds itself in a block with a mass of 0.992 kg that rests on a frictionless, Find the magnitude of the block's velocity just after impact
A power station with an efficiency of 0.5 generates 10^8W of electric power and dissipates 1.00 x10^8 W of thermal energy to the cooling water that flows through it.
In an action-adventure film, the hero is supposed to throw a grenade from his car, which is going 94.0 km/h, to his enemy's car, which is going 112 km/h. Find the magnitude of the velocity relative to the earth
You stand at the center of a carousel spinning at rate w. You throw a ball horizontally with velocity Vo from a heigh h. what is the centrifugal force on the ball? what is the coriolis force on the ball?
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