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A 55 kilogram person holds a weight of 20 kilogram on his head. Obtain what is the work done by him against gravity if he moves a distance of 20 meter
(1) on a horizontal road,
(2) on an incline of 1 in 5?
An "energy bar" contains 21g of carbohydrates. If the energy bar was his only fuel, how far could a 68 kg person walk at 5km/hr? Express your answer using two significant figures.
The speed of sound in bone is 3500 m/s. How much time does it take the echo of a sound wave to travel from the back of the bone to the front of the bone if the bone is 2.50 cm thick.
Two point masses m1 = 2 kg and m2 = 1 kg are connected by a thin massless rod of length L = 2 m, What is the kinetic energy of this rotation
An astronaunt has landed on a strange new planet and conducts an experiment to determine the acceleration of gravity. She uses a pendulum that has a period of oscillation of 2.84 s on the strange planet and 11.85 s on Earth. What is acceleration of g..
A 200-turn rectangular coil having dimensions of 3.0 cm by 5.0 cm placed in a uniform magnetic field of magnitude 0.90T. Find the current in the coil if the maximum torque exerted on it by the magnetic field is 0.15 N.m
Find equation for the ground state energy for a particle in a spherically symmetric potential well,V(r) = -ad(r-a), and show that the bound state appears only when a is greater than some critical value.
An anemometer for measuring wind speed consists of four metal cups, each of mass m = 140 g, mounted on the ends of four essentially massless rods of length R= 0.37 m. The rods are at right angles to each other and the structure rigidly rotates..
A diverging lens (f = –12.0 cm) is located 19.0 cm to the left of a converging lens (f = 27.0 cm). A3.00-cm-tall object stands to the left of the diverging lens, precisely at its focal point.
What are the two types of errors one encounters in experiments? Give an example of each, What does standard deviation of measured data tell you
An electron is inside a solenoid, 28 cm from the solenoid axis. At what rate is the solenoid's magnetic field changing
a 71 tall graduated cylinder is filled with 21 of glycerin density 1260 and 50 of water. find the pressure difference
An induced emf of 12V is produced when a 350 loop coil, ofradius 4.2cm is placed perpendicular to a magnetic field and turn90deg in 0.08s. calculate the intensity of the megnetic field
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