At the solstice, what is the maximum angle the Sun can be above or below the equator?
What will be an ideal response?
+23.5 degrees in summer and -23.5 degrees in winter.
You might also like to view...
A 12.0-kg mass is placed on a 25.0° incline and friction keeps it from sliding. The coefficient of static friction in this case is 0.580 and the coefficient of sliding friction is 0.520 . The mass is given a shove causing it to slide down the incline. Taking down the incline as positive, what is the acceleration of the mass while it is sliding?
a. -1.99 m/s2 c. -0.477 m/s2 b. 1.99 m/s2 d. 0.477 m/s2
A refrigerator absorbs energy of magnitude |QC | as heat from a low temperature reservoir and transfers energy of magnitude |QH| as heat to a high temperature reservoir. Work W is done on the working substance. The coefficient of performance is given by:
A. |QC |/W B. |QH|/W C. (|QC | + |QH|)/W D. W/|QC | E. W/|QH|
A 20 N horizontal force is applied to a 4.0 kg box. Friction is negligible. The box moves a horizontal distance of 3.0 meters. The work done by the 20 N force is
A. 60 J. B. 80 J. C. 10 J. D. 92 J. E. 65 J.
A bright red nebula is called an HII region when it contains
A. molecular hydrogen gas, H2. B. hydrogen atoms which have been ionized by ultraviolet radiation. C. hydrogen which is generating 21-cm radio waves. D. hot hydrogen gas thermally glowing.