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A tree is growing at the edge of a pond. The top of the treeis seen reflected 75m from the base of the tree and 15m from thefeet of an observer whose eyes are 1.8m above thepond/mirror. How tall is the tree?
Your teacher tosses a basketball. The ball gets through the hoop (lucky shot). How long does it take the ball to reach the hoop
A 30 kg girl who's running at 3 m/s jumps on a stationary 10 kg sled on a frozen lake. How fast does the sledwith the girl on it move
The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion km , is meant to orbit the asteroid Eros at a height of about 15km. What will be the period of NEAR as it orbits Eros
In a slow pitch softball game, a .200 kgsoftball crosses the plate at 15.0 m/s at an angle of 45 degreesbelow the horizontal. what is the maximum force on the ball
An archer shoots arrows at a target. Some of the arrows stick inthe target, while others bounce off. Assuming that the masses ofthe arrows and the velocities of the arrows are the same, whicharrows produce a bigger impulse on the target?
A mass M of a liquid at a temperature T1 is mixed with an equal mass of the same liquid at a temperature of T2. The system is thermally insulated. If C is themperature-independent specific heat of that liquid
A charge of 6.53mC is placed at each corner of a square .470 m on a side. Determine the direction of the force on each charge
a target in a shooting range gallery of a square wooden board of side length s 0.500 meter and mass mt 0.750 kg that
How various kilograms of nitrogen are boiled away in time of 7.50 h. car that hits a line of water barrels and takes 1.8s to stop.
The earth is 1.49*10^11 meters from the sun. If the solar radiation at the top of the earths atmosphere is 1340 W/m^2, what is the total power output of the sun
An electron is released from rest at the negative plate of a parallel plate capacitor. How fast is the electron moving just before it reaches the positive plate
The lighter ball is pulled away to a 60 degrees circular angle with the vertical and released. Illustrate what is the speed of the lighter ball before impact?
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