Astronomers have discovered more planets around other stars than in our Solar System

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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A simply supported steel beam of length L 5 1.5 m and rectangu-lar cross section (h 5 75 mm, b 5 20 mm) carries a uniform load of q 5 48 kN/m that includes its own weight. The maximum transverse shear stress on the cross section at 0.25 m from the left support is approx-imately:


(A) 20 MPa
(B) 24 MPa
(C) 30 MPa
(D) 36 MPa

Physics & Space Science

The Earth and Moon always keep the same side towards each other

Indicate whether the statement is true or false

Physics & Space Science

An electron in a hydrogen atom makes a transition from the n = 3 to the n = 1 energy state. Determine the wavelength of the emitted photon (in nm)

a. 1006 b. 209 c. 306 d. 103 e. 821

Physics & Space Science

Suppose you want to set up a simple pendulum with a period of 2.50 s. How long should it be

(a) on Earth, at a location where g = 9.80 m/s2? (b) on a planet where g is 5.00 times what it is on Earth?

Physics & Space Science