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Questions in physics

📝 Answered - Which of the following quantities is inversely proportional to the gravitational pull between two objects? A. The sum of their masses B. The sum of their volumes C. The square of the distance that separates them D. The distance from their center to their surface

📝 Answered - How did the moon form? A. A large body crashed into Earth soon after its own formation. B. A gas cloud condensed around Earth at the same time Earth itself condensed. C. Early Earth was unstable and split into the moon and what became Earth. D. The moon was captured by Earth early on.

📝 Answered - Set the correct answer. [tex] \begin{array}{l} G=6.67 \times 10^{-11} N m^2 / kg^2 \ M_e=5.598 \times 10^{24} kg \ v=\sqrt{\frac{G K}{r}} \end{array} [/tex] What is the velocity of an Earth satellite that is in a circular orbit with a radius of [tex]$7.5 \times 10^7$[/tex] meters measured from the center of the Earth? a. [tex]$29 \times 10^3$[/tex] meters b. [tex]$23 \times 10^{-3}$[/tex] meters c. [tex]$75 \times 10^3$[/tex] meters d. [tex]$50-\omega^3$[/tex].

📝 Answered - An electric dryer connected to a 120-V source draws 8.0 A of current. For the electric dryer, find the number of coulombs that flow through in 0.90 min

📝 Answered - 1. [tex](-5,6)(-3,3)[/tex] a. Draw the Coordinates b. Solve the distance c. Solve the midpoint d. From the origin connect the midpoint e. Solve the vector. f. Solve the angle of Direction 2. [tex]50 mN , 60 mE , 90 m S , 150 m, E , 75 m N[/tex] a. Draw the vector diagram b. Solve the vector c. Solve the angle of direction

📝 Answered - The following table shows the distance from the sun of some unknown planets of equal mass. Distance from Sun | Planet | Distance from Sun | | :----- | :---------------- | | W | 1.5 AU | | X | 0.723 AU | Which of the following best explains which planet revolves at a faster speed? A. Planet X, because the gravitational force is strengthened by distance B. Planet W, because the sun pulls it with a greater force C. Planet W, because the gravitational force is weakened by distance D. Planet X, because the sun pulls it with a less force

📝 Answered - Before reaching Saturn, the Cassini space probe has to pass the orbit of which planet? A. Uranus B. Jupiter C. Neptune

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - Which statement best compares momentum and kinetic energy? A. If you double the velocity of an object, its kinetic energy doubles. But for the same increase in velocity, the momentum increases four times. B. If you double the velocity of an object, its momentum doubles. But for the same increase in velocity, the kinetic energy increases four times. C. If you double the velocity of an object, its momentum and kinetic energy doubles. D. If you double the velocity of an object, its momentum and kinetic energy increases four times.

📝 Answered - We know there is matter that cannot be seen by any means available to us, including the different wavelengths of the electromagnetic spectrum. Yet we know this so-called "dark matter" exists. How? A. Black holes have consumed much of the matter that once existed. B. At the origin of the universe, there was a large amount of antimatter that became hidden. C. Einstein's equation shows us the equivalence of energy that could also be considered matter. D. The spins of galaxies cannot be explained by the amount of known, ordinary matter.