State Kepler's three laws of planetary motion
What will be an ideal response?
1. The orbit of each planet is an ellipse with the Sun at one focus.
2. As a planet moves around its orbit, it sweeps out equal areas in equal times.
3. A planet's period squared is equal to its semimajor axis cubed.
You might also like to view...
New surveys suggest brown dwarfs, stars under the critical mass for stable fusion, are probably very rare.
Answer the following statement true (T) or false (F)
The zirconium nucleus contains 40 protons, and an electron is 1.0 nm from the nucleus. What is the electric force on the electron due to the nucleus? ( e = 1.60 × 10-19 C, k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 2.9 nN B) 1000 C C) 3.7 nN D) 6.8 nN E) 9.2 nN
Plane waves of ultrasound, f = 51.0 kHz, impinge on a flat plane with a 1.00 cm-wide slit. What is the total angular width (2?) of diffracted sound waves when the speed of sound in air is 340 m/sec
a. 167° b. 83.6° c. 19.5° d. 41.8° e. 0.11°
The voltage supplied to an ac circuit is given by v = 120 sin(60t). What are the rms voltage and the frequency?
A. 120 V, 60 Hz B. 120 V, 380 Hz C. 170 V, 9.5 Hz D. 85 V, 9.5 Hz E. 240 V, 30 Hz