An inventor discovers a harmless and tasteless salt, which when added to water changes its boiling point. The market value for this salt will be better if the salt
A) lowers the boiling point of water.
B) raises the boiling point of water.
C) either raises or lowers the boiling point, as the food would be cooked either way.
D) none of the above
Answer: B
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There are no _______________ rocks on the surface of the Moon
Fill in the blank(s) with correct word
A spring-powered launcher has a spring with a spring constant of 50.0 N/cm. The launcher is prepared to launch a projectile by compressing the spring by 5.00 cm. If the mass of the projectile is 10.0 grams, then what is the velocity of the projectile when it is launched from the launcher?
A. 65.4 m/s B. 52.8 m/s C. 45.7 m/s D. 40.5 m/s E. 35.4 m/s
The figure above shows two yo-yos that have the same mass and rotational inertia. The one on the right has a thicker axle than the one on the left. The torque produced by gravity is
A. zero; there is no net torque on the yo-yos. B. larger for the yo-yo on the right. C. larger for the yo-yo on the left. D. the same for both yo-yos.
The gold in Uncle Harry's teeth fillings originated in
A) the deep interior of the Earth. B) fusion processes that date back about 5.5 billion years. C) the Big Bang. D) stars that blew up eons ago. E) Fort Knox.