The Earth is 1.49 × 10^11 m from the Sun. If the solar radiation at the top of the Earth's atmosphere is 1340 W/m2, what is the total power output of the Sun?
a. 2.34 × 10^30 W
c. 6.62 × 10^26 W
b. 3.74 × 10^26 W
d. 7.48 × 10^27 W
B
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A plane is headed eastward at a speed of 156 m/s. A 20.0 m/s wind is blowing southward at the same time as the plane is flying. The velocity of the plane relative to the ground is
A) 157 m/s at an angle 7.31° south of east. B) 157 m/s at an angle 7.31° east of south. C) 155 m/s at an angle 7.36° south of east. D) 155 m/s at an angle 7.36° east of south. E) 157 m/s at an angle 7.36° south of east.
Does Simple Harmonic Motion occur when the force, acting on a mass, is positively proportional to the displacement (F = kx)? Explain
What will be an ideal response?
A scientific model is considered valid if it is consistent with
A) a single observation by an individual scientist B) the opinions of experts in the field C) repeated observations made by an individual scientist D) independent observations made by different scientists
A 5.00-g lead BB moving at 44.0 m/s penetrates a wood block and comes to rest inside the block. If half of its kinetic energy is absorbed by the BB,
what is the change in the temperature of the BB? The specific heat of lead is 128 J/kg ? K. A) 0.940 K B) 1.10 K C) 1.26 K D) 2.78 K E) 3.78 K