How do the rotation and the revolution of Earth affect the apparent motion of celestial objects in the night sky?

What causes the apparent motion of these stars and constellations?

Which is a group of constellations through which the Sun appears to move ? A. ecliptic B. equinox C. solstice D. zodiac

The sun appears to move across the sky, because the earth spins on its axis. To a person standing on the earth, the sun subtends an angle of

$$\theta _ { \operatorname { sun } } = 9.28 \times 10 ^ { - 3 } \mathrm { rad }$$

How much time (in seconds) does it take for the sun to move a distance equal to its own diameter?

Predict The constellation Orion appears in the eastern sky in December. Where would you expect it to appear in March? Why?

Use the change-of-base theorem to find an approximation to four decimal places for each logarithm. $\log _{2} 5$

Solve each equation. $\sqrt{2} x^{2}-4 x+\sqrt{2}=0$

On a cool morning, when the temperature is $15^{\circ} \mathrm{C}$, you measure the pressure in your car tires to be 30 psi. After driving 20 mi on the freeway, the temperature of your tires is $45^{\circ} \mathrm{C}$. What pressure will your tire gauge now show?

A $20 \mathrm{cm} \times 20 \mathrm{cm}$ square loop has a resistance of $0.10 \Omega$. A magnetic field perpendicular to the loop is $B=4 t-2 t^{2}$, where B is in tesla and t is in seconds. What is the current in the loop at t = 0.0 s, t = 1.0 s, t = 2.0 s?

Which of the following statement(s) is(are) true? In a concentration cell electrons always flow from the compartment with the lower ion concentration to the compartment with the higher ion concentration.

Define and describe cycle efficiency.

Why is the following situation impossible? A technician is measuring the index of refraction of a solid material by observing the polarization of light reflected from its surface. She notices that when a light beam is projected from air onto the material surface, the reflected light is totally polarized parallel to the surface when the incident angle is $41.0^{\circ}$.

A 200 $\Omega$ resistor is connected to an AC source with $\mathcal{E}_{0}=10 \mathrm{V}$. What is the peak current through the resistor if the emf frequency is (a) 100 Hz? (b) 100 kHz?

A certain lightbulb is rated at 60.0 W when operating at an rms voltage of 120 V. (a) What is the peak voltage applied across the bulb? (b) What is the resistance of the bulb? (c) Does a 100-W bulb have greater or less resistance than a 60.0-W bulb? Explain.