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A sealed vertical cylinder of radius R and height h = 0.542 m is initially filled halfway with water, and the upper half is filled with air. By what distance is the depth of the water lowered
A transformer has 350 turns and 94 turns for the primary and secondary respectively. what is the output voltage of the secondary
A coil with an inductance of 1.8 H and a resistance of 6.7 ? is suddenly connected to a resistanceless battery with an ? = 80.0 V. What is the rate at which thermal energy is appearing
In 0.749 s, a 9.43-kg block is pulled through a distance of 4.84 m on a frictionless horizontal surface, starting from rest. By how much does the spring stretch
a teacher standing in a doorway 1.0 m wide blows a whistle with a frequency of 1000 hz to summon children from the playground. which boy may not hear the whistle
A typical adult ear has a surface area of 1.45 × 10-3 m2. The sound intensity during a normal conversation is about 2.49 × 10-6 W/m2 at the listener's ear. How much power is intercepted
A supertanker filled with oil has a total mass of 11.7·108 kg. If the dimensions of the ship are those of a rectangular box 209 m long, 81.7 m wide
An ice cream cone is filled with melted vanilla ice cream of density 1.21g/cm3 The cone is 10.1cm long and has a diameter of 6.1 cm at the larger top end. Find the gauge pressure at the bottom of th
Assuming a constant pressure gradient, if blood flow is reduced by 52%, by what factor is a blood vessel decreased in radius
During a research experiment on the conduction of current in the human body, a medical technician attaches one electrode to the wrist, what is the overall resistance of the patient's arm
An ideal refrigerator maintains a temperature of 8c inside it, whereas in the kitchen the temperature is 25c. find te energy ejected into the kitchen
Two parallel current carrying wires are separated by 12 cm and each are 50 cm in length. Determine the Force acting on each wire due to the other one
A plastic bucket with negligible mass and specific heat holds 2 kg of water at temperature 20c. Find the entropy change of the ice as it cools and freezes into ice
A uniform 1.6-kg rod that is 0.91 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
an electron, proton and an alfa particle, accelerated trough the same potential difference, enter a region of uniform magnetiv field, what are the radii of the electron and alfa particle path
A wheel experiences a time dependant angular acceleration given by ?(t) = 3 + 0.333t^3. Derive an expression for the angular velocity as a function of time
A constant force of 50 N is applied tangentially to the rim of a solid disc with a 60 cm radius. The wheel has a moment of inertia of 40 kgm^2. What is the mass of the disc
One beam so protons is moving with a speed close to speed of light, inside a magnetic field with a strength of 12T on z-direction. Calculate the magnetic force in vectorial form
A 6.43 kg ball is thrown upward with an initial speed of 14.34 m/s. Ignore air resistance when answering the following questions. What is the ball's initial kinetic energy
A flexible chain weighing 37.0 N hangs between two hooks located at the same height. Find the magnitude of the force each hook exerts on the chain
A 450 lb boy pushes on a 300 lb box with a force of 125 lb. If the box slides across the floor with constant velocity, what is the net force on the box
A solid uniform brick is placed on a sheet of wood. When one end of the sheet is raised , What is the width w of the brick
You have been hired as a manufacturing engineer, What is the minimum coefficient of friction between the parts and the belt to ensure none of the parts slip when they are sped up by the belt
A child is trying to stack two uniform wooden blocks, 12 cm in length, so they will protrude as much as possible over the edge of a table
A 5.25 uF capacitor is initially charged to a potential of 15.0 V. It is then connected in series with a 3.55 mH inductor. What is the maximum current in the inductor