An electron (m = 9.1 × 10^?31 kg) has a speed of 0.90 c. What is the difference between its relativistic momentum and its non-relativistic momentum (in kg m/s)?
a. 4.3 × 10^?22
b. 3.2 × 10^?22
c. 5.4 × 10^?22
d. 6.5 × 10^?22
e. 2.5 × 10^?22
b
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Satellite Motion: The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. The mass of the earth is 5.97 × 1024 kg, the radius of the earth is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2. Assume a circular orbit.(a) What is the period of the International Space Station's orbit?(b) What is the speed of the International Space Station in its orbit?
What will be an ideal response?
If our eyes were sensitive only to X rays, the world would appear __________.
A. gray, black, and white like a medical X ray B. brighter than normal because X rays carry more energy than visible light photons C. dark because X-ray light does not reach Earth’s surface D. green, yellow, and orange, because those are the colors of X rays
A proton is first accelerated from rest through a potential difference V and then enters a uniform 0.750-T magnetic field oriented perpendicular to its path. In this field, the proton follows a circular arc having a radius of curvature of 1.84 cm
What was the potential difference V? (mproton = 1.67 × 10-27 kg, e = 1.60 × 10-19 C)
A 30-?F capacitor is charged to 40 V and then connected across an initially uncharged 20-?F capacitor. What is the final potential difference across the 30-?F capacitor?
A. 15 V B. 24 V C. 18 V D. 21 V E. 40 V