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A 65 kg man in a 5.9 kg chair tilts back so that all his weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area of radius 0.9 cm. Find the pressure exerted on the floor by each leg. The acceleration of gravity is 9.8 m/s2 .
River Pascal with a volume flow rate of 3.4x10^5 L/s joins with river Archimedes, which carries 1.12x10^6 L/s, to form the Bernoulli River. What is the speed of the water in the Bernoulli River
An ac generator supplies an rms voltage of 5.00 v to an RL circuit. At a frequency of 21.0kHz the rms current in the circuit is 45.0 mA; at a frequency of 26.0 kHz the rms current is 40.0 mA. What is the values of L in this circuit? What is the value..
A 24-V battery is connected in series with a resistor and an inductor, with R = 4.2 ? and L = 6.0 H, respectively. Find the energy stored in the inductor when the current reaches its maximum value
A power supply has an open-circuit voltage of 35.0 V and an internal resistance of 2.00 O. What additional resistance should be added in series
How does an electroscope work? I have a homework problem that is asking me to sketch an arrangement of excess positive or negative charges in various regions on a picture of an electroscope (that is positiv charged) to show what happens to the charg..
The drawing shows a graph of two waves traveling to the right at the same speed. Using the data inthe drawing, determine the wavelength of each wave. The speed of the wavesis 19 m/s; calculate the frequency of each one.
Two cars of the same mass collide at an intersection. Just before the collision one car is traveling east at 40.0 km/h and the other car is traveling south at 70.0 km/h. what is the speed of the cars immediately after the collision
A molecule of DNA (deoxyribonucleic acid) is 2.28 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. Determine the effective spring constant of the molecule
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0°C and rejects heat to a room at 22.5°C, How much heat is discharged into the room
The base of the cloud, which is roughly parallel to the Earth's surface, serves as the negative plate and the region of Earth's surface under the cloud serves as the positive plate. The separation between the cloud base and the Earth's surface is ..
A uniform bar of length 18 m and mass 1 kg is attached to a wall with a hinge that exerts a horizontal force Hx and a vertical force Hy on the bar. find the magnitude of the horizontal force Hx on the pivot
The average lifetime of a pi meson in its own frame of reference is 2.6×10-8 s. (This is the proper lifetime.), What is the average distance it travels before decaying
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