An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 10 N. The radius of the planet is 4.0 × 10^6 m. What is the mass of Planet X? (G = 6.67 × 10^-11 N × m2/kg2)
a. 13 × 10^19 kg
c. 9.6 × 10^24 kg
b. 17 × 10^22 kg
d. 4.8 × 10^24 kg
D
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A thin-walled spherical tank with a diameter of 1.5 m and wall thickness of 65 mm has an internal pres- sure of 20 MPa. The maximum shear stress in the wall of the tank is approximately:
(A) 58 MPa
(B) 67 MPa
(C) 115 MPa
(D) 127 MPa
What is the relationship between the image distance and the object distance for a plane (flat) mirror?
A. They are not related B. The image distance is double the object distance C. The image distance is half the object distance D. They are the same.
To achieve a high equivalent resistance for a pair of resistors, connect them in
A) series. B) parallel. C) either of these
What electric charge is characteristic for an ion of O?
a. 6+ b. 0 c. 2– d. 2+