In our Sun, the spectral lines of hydrogen are weak, compared to their appearance in hotter stars
Indicate whether the statement is true or false
TRUE
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A soda-lime
At one instant a heavy object in air is moving upward at 50 m/s. One second later its speed is approximately
A) 40 m/s. B) 50 m/s. C) 55 m/s. D) 60 m/s.
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively. An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain
The near-point distance of the person using the microscope is 25.0 cm. What is the final magnification of the microscope? A) -190 B) -240 C) -300 D) -310 E) -470
A solid sphere, a solid cylinder, a spherical shell, and a hoop all have the same mass and radius. Each are rolling on a horizontal surface with the same center of mass speed, and then they roll up identical inclines. Which one goes the greatest distance up its incline?
a. the hoop b. the solid sphere c. the spherical shell d. the cylinder e. They all go the same distance up their inclines.