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150 grams of boiling water (temperature 100 C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 850 grams and initial temperature 22 C (the heat capacity of aluminum is 0.9
The time constant of an RC circuit is 6.93s. How much time t is required for the capacitor(uncharged initially) to gain one-half of its full equilibrium charge?
An athlete at the gym holds a 5.23 kg steel ball in his hand. His arm is 71.6 cm long and has a mass of 6.74 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight
The skater farthest out has a mass of 80.0 kg and is 6.35 m from the pivot. He is skating at a speed of 7.60 m/s. Determine the magnitude of the centripetal force that acts on him.
The cup with water, do you see more of the penny, less of the penny or the same amount as the penny as you did without the water? Explain your answer.
Black Holes are suspected when a visible star is being noticeably pulled by an invisible partner that is more than 3 times as massive as the Sun. A red giant star is accelerated in a linear directi
If you were given a flat piece of plastic from a hit and run, write down a procedure to figure out what type of car was involved in the hit and run.
The container of oil and the air bubble are at 20° C where the density of air is 1.20 kg/m3. What is its terminal velocity? Answer given in cm/s.
A ball of mass 7 kg is thrown straight up in the earth's gravitational field with an initial speed v0 = 10 m/s. How do you find the speed of the ball at a height h=1.9m?
Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10-2 cm, mounted coaxially within a cylindrical anode with a radius of 0.5580 cm. The potential difference between the
Clyde pushes from behind with 445{rm N} of force while Bonnie pulls forward on a rope with 325{rm N} of force. What is the coefficient of friction of the safe against the floor?
Bonnie and Clyde are sliding 370 {rm kg} bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 390 {rm N} of force while Bonnie pul
A shotputter throws the shot with an initial speed of 15.9m/s at a 36.0 angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height o
A 66.0-{rm kg} person stands on a scale in an elevator.What does the scale read (in {rm N}) when the elevator is at rest? What does the scale read (in {rm N}) when the elevator is climbing at a cons
If the composition of the upper atmosphere were changed to permit a greater amount of terrestrial radiation to escape, what effect would this have on Earth's climate?
A stone hangs by a fine thread from the ceiling, and a section of the same thread dangles from the bottom of the stone. If a person gives a sharp pull on the dangling thread, where is the thread li
An electron rotates in a circula orbit about a heavy fixed proton. the radius of the orbit is 10^-8 cm. Find the velocity of the electron.
It has 40 gallons of gasoline in its tanks and the passengers and pilot weigh 340 lbs. How much water is displaced given that the weight density of gasoline is 5.67 lbs/gal?
For your science fair project you need to design a diffraction grating that will disperse the visible spectrum (400-700 nm) over 30 degrees in first order.
A 380 kg piano slides 3.9m down a 27 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Determine the force exerted by the man
Parallel-plate capacitor is made from two plates 12.0 {rm cm} on each side and 4.50 {rm mm} apart. Half of the space between these plates contains only air, but the other half is filled with Plexig
A viewing window in the Atlanta aquarium is 69 inches wide and 41 inches high. If the average pressure of the water inside the tank is 17.3 psi, what is the outward force on the window?
What is the total electric potential at the center of the square?
A capacitor is connected to an ac generator that has a frequency of 2.4 kHz and produces a rms voltage of 2.5 V. The rms current in the capacitor is 32 mA.
A block with mass m = 19.0 kg slides down an inclined plane of slope angle 17.8 ° with a constant velocity. It is then projected up the same plane with an initial speed 1.35 m/s. How far up the