What is the specific 3-step energy generating process in the Sun called?
A. the proton-proton chain
B. radiative transfer
C. hydrostatic equilibrium
D. thermography
Answer: A
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Friction: A 50-kg box is being pushed along a horizontal surface. The coefficient of static friction between the box and the ground is 0.65, and the coefficient of kinetic friction is 0.35. What horizontal force must be exerted on the box for it to accelerate at 1.2 m/s2?
A. 60 N B. 120 N C. 170 N D. 230 N E. 490 N
Around other suns, we have found Jupiters where Mercury should be
Indicate whether the statement is true or false
Spreading centers are marked by mid-ocean ridges where hot mantle material rises upward and then spreads sideways
Indicate whether the statement is true or false
The nuclei of He are also known as
A) ? particles. B) ? particles. C) ? rays. D) x-rays. E) positrons.