Venus' rotation period is longer than its year

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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An experiment for determining the value of the universal gravitational constant G was devised by Jolly

He placed a 5.00-kg sphere on a balance and, after it was balanced, he moved a 5775-kg lead sphere under the 5.00-kg sphere, causing the balance to tilt off its equilibrium position. The distance between the centers of the two spheres was 0.569 m. Knowing that G = 6.67 x 10-11 N•m2/kg2, what mass did he need to add to the other side of the scale to bring it back in balance? A) 0.606 mg B) 5.94 mg C) 3.39 mg D) 0.345 mg E) 0.912 N

Physics & Space Science

Why do we believe that most of the mass of the Milky Way is in the form of dark matter?

A) The orbital speeds of stars far from the galactic center are surprisingly high, suggesting that these stars are feeling gravitational effects from unseen matter in the halo. B) Theoretical models of galaxy formation suggest that a galaxy cannot form unless it has at least 10 times as much matter as we see in the Milky Way disk, suggesting that the halo is full of dark matter. C) Although dark matter emits no visible light, it can be seen with radio wavelengths, and such observations confirm that the halo is full of this material. D) Our view of distant galaxies is sometimes obscured by dark blotches in the sky, and we believe these blotches are dark matter located in the halo.

Physics & Space Science

At the point of fission, a nucleus of U-238, with 92 protons is divided into two smaller spheres each with 46 protons and a radius of 5.9 × 10^?15 m. What is the repulsive force pushing the two spheres apart when they are just touching one another? (The mass of the U-238 nucleus is 3.98 × 10^?25 kg.)

Physics & Space Science

A wave in which the particle displacement is parallel to the wave motion is called a(n) ______________ wave

Fill in the blank(s) with correct word

Physics & Space Science