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A person shoots a tennis ball out of a launcher. The tennis ball rises to a maximum height of 38 meters.
a. What is the initial velocity of the tennis ball out of the launcher?
b. How long (in seconds) is the tennis ball in the air before it hits the 38 meter mark?
c. Graph y as a function of t. What is the equation of this graph? What is the first derivative of this equation?
d. Graph v as a function of t. What is the equation of this graph? What is the first derivative of this equation?
e. Graph a as a function of t. What is the equation of this graph?
A copper wire has a square cross section 2.7 on a side. The wire is 3.8 long and carries a current of 4.0 . The density of free electrons is 8.5*10^28 m^-3.
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
One of the harmonics of a column of air open at one end and closed at the other has a frequency of 448 Hz, What is the fundamental frequency of the air column
A person with perfect pitch sits on a bus bench listening to the 445 Hz horn of an approaching car. If the person detects the frequency of 488 Hz, how fast is the car moving.
In one form of plethysmograph (a device for measuring volume), a rubber capillary tube with an inside diameter of 1.22 mm is filled with mercury at 20°C, Calculate the resistance of the mercury
Point A is at position (4j -3k)cm. Point B is at position -3cm k. Point C is at position (3i -2j + 5k) cm. Point D is at position 4cm j. Charges of -4 and +5uC are at A and B respectively. What is the electric potential energy of an electron at D
A rock is released from rest into water. The magnitude of Fd of the drag force acting on the rock due to its motion through water can be modeled as Fd = Cd(v), where v is the speed of the rock and Cd is the constant drag coefficient. Determine the..
An object initially at rest explodes in two fragments of masses 2.6 kg and 3.3 kg that move in diametrically opposite directions. find the internal energy of the explosion
A crate of mass 10.3 kg is pulled up a rough incline with an initial speed of 1.51m/s. The pulling force is 97N parallel to the incline, which makes an angle of 20.3 ° with horizontal. The coefficient of kinetic friction is 0.400, and the crate is..
A cubical box with sides of length a#consists of five metal plates which are welded together and grounded, Find the potential everywhere inside the box
What frequency will hear after the train passes
A window washer is climbing up a ladder to wash a window. The end of the 10.5 foot ladder exactly touches the windowsill, How far off the ground is the windowsill
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