A change in the direction of a wave resulting from its meeting an opaque material is called ______________
Fill in the blank(s) with correct word
reflection
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An ac generator has 80 rectangular loops on its armature. Each loop is 12 cm long and 8 cm wide. The armature rotates at 1200 rpm about an axis parallel to the long side
If the loop rotates in a uniform magnetic field of 0.30 T, which is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator? A) 20 V B) 27 V C) 29 V D) 33 V E) 35 V
Lens-Maker Formula: As part of a piece of optical apparatus to be used in air, you need to design a thin lens having faces with radii of curvature of magnitude 24 cm each. When an object 32 mm tall is placed 30 cm from this lens, it must form a real image 60 cm from the lens.(a) What must be the index of refraction of the lens material?(b) What is the height of the image of the object? Is it upright or inverted; is it real or virtual?
What will be an ideal response?
In general, the more massive the star, the ________ its lifetime
Fill in the blank(s) with correct word
You push on box G that is next to box H, causing both boxes to slide along the floor, as shown in the figure. The reaction force to your push is
A) the push of box G on box H. B) the push of box H on box G. C) the push of box G against you. D) the upward force of the floor n box G. E) the acceleration of box G.