Two uses of ultrasound are __________ and __________
Fill in the blank(s) with correct word
forming images of internal organs, navigation by bats, automatic focus cameras, controlling insects
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A ball is thrown straight up. Neglecting air resistance, which statement is not true regarding the energy of the ball?
(a) The potential energy decreases while the ball is going up. (b) The kinetic energy decreases while the ball is going up. (c) The sum of the kinetic energy and potential energy is constant. (d) The potential energy decreases when the ball is coming down. (e) The kinetic energy increases when the ball is coming down.
The inner boundary of the Sun's habitable zone currently lies
A) between the orbits of the Earth and Venus B) between the orbits of Venus and Mercury C) exactly at the distance of the Earth's orbit D) exactly at the distance of Venus
If a 22 
resistor has a current of 2.0 A flowing through it, what is the potential difference across it?
A. 0.091 V B. 44 V C. 11 V D. 24 V E. 20 V
Why does the rotation of our galaxy suggest that it is more massive than previously thought?
What will be an ideal response?