A small ball is tied to one end of a light 2.5-m wire, and the other end of the wire is hooked to the ceiling. A person pulls the ball to the side until the wire makes an angle of 35° with the plane of the ceiling and then gently releases it
What is the angular speed of the ball, in rad/s, as it swings through its lowest point?
1.8 rad/s
Physics & Space Science
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The speed of a 10-kHz sound wave in seawater is approximately 1500 m/s. What is its wavelength in sea water?
a. 5.0 cm b. 10 cm c. 15 cm d. 20 cm e. 29 cm
Physics & Space Science
When a boat sails from fresh water to salt water, the boat will float
A) lower in the water. B) higher in the water. C) at the same water level.
Physics & Space Science
The Sun traces a path along the ecliptic in a period that is longer than 365 days
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
Only a hot, thin gas can produce an emission line
Indicate whether the statement is true or false
Physics & Space Science