How much current will be flowing through a 40.0 m length of cylindrical metal wire with radius 0.0 mm if it is connected to a source supplying 16.0 V?
The resistivity of this metal is 1.68 × 10-8 ? ? m.
A) 68 nA B) 9.5 × 108 A C) 710 A D) 1200 A
D
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Projectile Motion: A projectile is launched with an initial velocity of 80 m/s at 30° above the horizontal. Neglecting air resistance, what is horizontal component of the projectile's acceleration?
A. 80 m/s2 B. 40 m/s2 C. 9.8 m/s2 D. 0 m/s2 E. 69 m/s2
Arvin the Ant travels 35 cm eastward, then 25 cm northward, and finally 10 cm westward. What is Arvin's direction of displacement with respect to his original position?
Two spheres are made of wood – the first is of a variety of wood whose density is equal to that of water, while the second is of a variety whose density is greater than that of water. These spheres have the same volume – and the first remains wherever it is placed in the water, so it is effectively suspended m in mid-water. The second rests on the bottom, being more dense than water. Compare the buoyant forces on the two spheres.
A. Nothing specifically can be concluded without knowing exactly the densities of the spheres. B. They are identical C. The force on the second is zero, and therefore less than that on the first, which is non-zero. D. The force on the second is non-zero and is less than that on the first.
If the radiant energy from the sun comes in as a plane EM wave of intensity 1340 W/m2, calculate the peak values of E and B
a. 300 V/m, 10?4 T b. 1 000 V/m, 3.35 × 10^?6 T c. 225 V/m, 1.60× 10?3 T d. 111 V/m, 3.00 × 10^?5 T e. 711 V/m, 2.37 × 10^?6 T