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Q1. An air molecule is moving at a speed of 450 m/s. How many meters would the molecule move during 7.00 ms (milliseconds) if it didn't collide with any other molecules?
Q2. Albert is piloting his spaceship, heading east with the speed of 0.90c. Albert's ship sends a light beam in the forward (east) direction, which travels away from his ship at speed c. Meanwhile, Isaac is piloting his ship in the westward direction, also at 0.90 c.
(a) Sketch a diagram of this situation. Include Albert, Isaac, the light beam from Albert's ship, and speeds.
(b) With what speed does Isaac see Albert's light beam pass his ship?
Q3. State and in terms of the length of the vector and the angle with the components separated by the comma.
Liquid nitrogen has a boiling point of 77.3 K and a latent heat of vaporization of 2.01 105 J/kg. A 60.0-W electric heating element is immersed in an insulated vessel containing 46.5 L of liquid nitrogen at its boiling point. How various kilograms of..
Two runners start simultaneously from the same point on the circular 200 m track and run in opposite directions. One runs at a constant speed of 6.14 m/s and the other runs at a constant speed of 5.43m/s. When they first meet, for how long a time ..
The pilot of an aircraft wishes to fly due west in a 34.60 km/h wind blowing toward the south. The speed of the aircraft in absence of a wind is 145 km/h.
If you now place a pencil under the edge of the mirror nearer the wall, tilting it upward by 5.0, how much higher on the wall is the spot?
An automobile club plans to race a 780 kg car at the local racetrack. The car needs to be able to travel around several 170 m radius curves at 85 km/h. What must the banking angle of the curves be so that the force of the pavement on the tires of the..
A lead ball is dropped into a lake from a diving board 5 above the water. After entering the water, it sinks to the bottom with the constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 3.20 after it is f..
What is the horizontal distance x to the base of the wall supporting the mirror of the near point on the floor that can be seen reflected in the mirror . What is the speed of the third fragment? Overlook effects due to gravity.
The longest "string" (a thick metal wire) on a particular piano is 3.0 m long and has a tension of 300.0 N. It vibrates with a fundamental frequency of 27.5 Hz. What is the total mass of the wire.
The tension Tu in upper (taut) segment of the belt is 170 N, and flywheel has a clockwise angular acceleration of 1.67 rad/s2. Find out the tension in the lower (slack) segment of the belt.
A young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.32 rad/s^2. If the tangential acceleration of the yo-yo at the end of the string is 0.15 m/s^2, how long is string.
The specific heat of a certain 50 g metallic block is 900 J/kg K. If the block is at an initial temperature of 80 degrees Celsius, and dropped into a 50 g bucket of water at 1 degree Celsius, Find the final temperature of the system
What is the speed of the projectile
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