The Sun fuses _____ hydrogen nuclei to make one helium nucleus

A) two
B) three
C) four
D) five


C

Physics & Space Science

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Power: When 5.00 A is flowing through an 10.0-? device, how much power is being dissipated in the device?

A. 50.0 W B. 250 W C. 500 W D. 2.50 kW

Physics & Space Science

A surprise from the Pioneer Venus photos was that:

A) the craters on Venus are all large. B) the clouds rotate around the planet in only four days, very unlike the slow surface rotation. C) the clouds of Venus are mainly water vapor, like our own. D) the highest volcano, Maxwell Mons, protrudes above the cloud deck. E) no impact craters at all are found on the Venusian surface.

Physics & Space Science

A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic device that emits a sound with a frequency of 39.6 kHz. A car is approaching him at a speed of 35.0 m/s

The wave is reflected by the car and interferes with the emitted sound producing beats. What is the frequency of the beats? The speed of sound in air is 343 m/s. A) 5000 Hz B) 4500 Hz C) 8490 Hz D) 9000 Hz E) 4250 Hz

Physics & Space Science

Three charged particles are arranged on corners of a square as shown in Figure OQ23.11, with charge -Q on both the particle at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the lower left corner. Suppose the +2Q charge at the lower left corner is removed. Then the magnitude of the field at the upper right corner:

1.becomes larger. 2.becomes smaller. 3.stays the same. 4.changes unpredictably.

Physics & Space Science