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A stone is dropped from rest into a well. The sound of the splash is heard exactly 2.00 s later. Find the depth of the well if the air temperature is 14.0°C. meter.
The blue line of the hydrogen emission spectrum has a wavelength of 433.9 nm. Calculate the energy of one photon of this light
A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.80 cm into the water. What is the weight of the truck
A disc spins at 20 [rpm]. Calculate the period of rotation (which is the time interval required for 1 revolution)
When people sleep, their metabolic rate is about 2.6 10-4 C/(s • kg). How many Calories does an 83 kg person metabolize though getting a good night's sleep of 9.0 hours.
Light from a laser beam with a wavelength of 600 nm passes through a narrow single slit and observed on a screen 1.5 m behind the slit. The first minimum of the diffraction pattern is 1.5 cm from the central maximum. How wide is the slit?
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of81.0m/sat ground level. What is its velocity just before it hits the ground
A 2-kg block of ices slides frictionlessly down a plane inclined at 22° a distance of 2 m. What is the normal force on the block of ice
A circular wire loop of radius 19.1 cm carries a current of 3.62 A. What is the magnitude of the torque acting on the loop
A system does 4.3 x10^4 J of work, and 7.7 x10^4 J of heat flows into the system during the process
A lens is placed 15 cm from the lamp, and the image is observed 32 cm from the lamp. find the distance of the second image from the lamp
Two 0.80g spheres are charged equally and placed 2.0cm apart. When released, they begin to accelerate at 160m/s^2. What is the magnitude of the charge on each sphere?
Ball A is attached to one end of a rigid massless rod, while an identical ball B is attached to the center of the rod, Find the tension in each half of the rod
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