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Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 19.0 m/s at an angle 48.0 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the ground.
1) What is the vertical component of the ball's velocity right before Sarah catches it?
2) How high above the ground will the ball be when it gets to Julie?
Two freight cars, each with a mass of 2.9 x 10^5 kg, collide and stick together. One was initially moving at 2.80 m/s and the other was at rest. What is the final speed.
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. How wide is the slit
For an atom (mythical), there are three possible energy levels between which an electron can jump
Waves on a 10 meter rope travel at 20 m/s. You shake the rope back and forth until you get a standing wave with a single antinode. find the wavelength and frequency of each standing wave
A vertical straight wire carrying an upward 26 A current exerts an attractive force per unit length of 9.0*10^-4 N/m on a second parallel wire 9.0 cm away
An electron enters a region of constant electric field that is produced by a parallel-plate capaci- tor, find the velocity of the electron when it exits the capacitor
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.65 s, What is the mass of the grapes
The wavelength of visible light ranges from 400 {\rm nm} to 700 {\rm nm}. Find the ranges of this light's angular frequency
An insulating sphere has a total excess charge Q distributed uniformly throughout the shere. Use Gauss's Law to calculate the electric field inside the sphere at a distance r
your digital camera has a lens with a 50 mm focal length and a sensor array that measures 4.82 mm x 3.64 mm. Suppose you're at the zoo, how far away from the object should you be
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.139 N when their center-to-center separation is 69.5 cm.
In which scenario do you experience the larges acceleration? Explain why using physical principles you have learned.
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