When an acid reacts with a carbonate or hydrogen carbonate, the products are ______________, carbon dioxide, and a salt
Fill in the blank(s) with correct word
water
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A hollow sphere has a mass of 15 kg, an inner radius of 12 cm and an outer radius of 18 cm. What is the rotational inertia (moment of inertia) of the sphere about an axis passing through its center?
A) 0.15 kg?m2 B) 0.24 kg?m2 C) 0.13 kg?m2 D) 0.17 kg?m2 E) 0.19 kg?m2
Why don't the nuclei of atoms contain any types of quarks but ups and downs?
A: Those are the only kind of quarks that exist. B: Only those types of quarks have positive charges. C: Only those types of quarks have negative charges. D: The other flavors are not massive enough. E: The other flavors do not live for very long.
A 3.0-kg mass is dropped from the edge of a 50-m tall building with an initial speed of zero. The mass strikes the ground with a downward velocity of 25 m/s. Find the change in mechanical energy of the mass caused by air resistance between the point where it is dropped and the point where it strikes the ground
a. ?0.46 kJ b. ?0.53 kJ c. ?0.61 kJ d. ?0.38 kJ e. ?0.81 kJ
Given the following energy profiles, which of the following reactions is endothermic?
A) a B) b C) c D) d E) none of the above