All the known matter, both normal and dark, only gives us an ?o of about .3
Indicate whether the statement is true or false
TRUE
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Who discovered Uranus?
a. Galileo Galilei b. William Herschel c. John Couch Adams d. Urbain Le Verrier e. Clyde Tombaugh
At t = 0, a particle leaves the origin with a velocity of 12 m/s in the positive x direction and moves in the xy plane with a constant acceleration of 
m/s2. At the instant the y coordinate of the particle is 18 m, what is the x coordinate of the particle?
A. 30 m B. 21 m C. 27 m D. 24 m E. 45 m
A hot air balloon has a volume of 2.00 × 103 m3 when fully inflated, and the air inside the balloon is always at atmospheric pressure of 1.01 × 105 Pa
because of the large opening used to fill the balloon and heat the air inside it. What is the mass of hot air inside the balloon if its temperature is 120°C? The universal gas constant is 8.314 J/mol•K. (Assume a molecular weight of 28.8 g/mol for air.) A) 1780 kg B) 5850 kg C) 203 kg D) 62.0 kg
If the displacement of an object, x, is related to velocity, v, according to the relation x = Av, the constant, A, has the dimension of which of the following?
a. acceleration b. length c. time d. area