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A baseball is thrown with an inital velocity of 20 m/s along the horizontal axis and 15 m/s along the vertixal axis. The ball soon reaches the highest point, what is the speed at that point? (ignore air friction) I know the answer is 20 m/s, just need to know why and how to get there.
A person is standing outdoors in the shade where the temperature is 33° C. What is the radiant energy absorbed per second by his head when it is covered with hair
A large water tank has an inlet pipe and an outlet pipe. The inlet pipe has a diameter of 2.05 cm and is 2.15 m above the bottom of the tank. What is the gauge pressure in the outlet pipe
As a spaceship flies past with speed v, you observe that 1.0000s elapses on the ship's clock in the same time that 1.0000min elapses on Earth. How fast is the ship traveling, relative to the Earth
In a Certain Organic molecule, the nuclei of two carbon atoms are separated by a distance of 0.25 nm. What is the magnitude of the electric force between them
An object is solid throughout. When the object is completely submerged in ethyl alcohol, its apparent weight is 14.9 N. compute the volume of the object
1. A communications system uses QPSK instead of binary PSK. How much bandwidth is saved 2. A modem utilizes 8PSK modulation. If the modem's baud rate is 24 kbps, what is the information rate in kbps
A mirror creates an image of magnification ?1/3. (a) Is the image upright or inverted? (b) If the object is 7.75 cm tall, what is the height of the image
A sealed tube (0.5 L) in volume confines two moles of an ideal gas at a pressure of 2 atm. what is the new pressure of the ideal gas
What is the magnitude of the horizontal net force. An 845-N sled is pulled a distance of 168 m. The task requires 1.20 multiplied by 104 J of work and is done by pulling on a rope with the force of 121 N. At what angle is the rope held.
A power supply that provides a voltage of 42.0 V·sin(362·t), where t is in seconds, is connected across a resistor R = 119 ?. Calculate the average power dissipated in the resistor
Then the driver sees a red light up ahead at next intersection, and starts slowing down at the constant rate. The car stops at the red light, 180 {rm m} from where it was at t = 0.
Two waves have the exact same frequency, wavelength, and amplitude. They are both travelling in the +x direction, What is the phase difference between the two waves.
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