3 years ago

Which one of the following is an example of an acid-base reaction?

Physics

1 answer:

Lina20 [59]3 years ago

6 0

Answer:

A. 2HCl + Mg(OH)2 + 2H2O + MgCl2

hope it helps

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Which of the following will attract one another? A. The north pole of magnet and the south pole of another magnet B. The north p

Elena L [17]

A. is the correct answer

7 0

3 years ago

g A 47.3 kg girl is standing on a 162 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a fla

koban [17]

Answer:

Explanation:

mass of the girl m₁ = 47.3 kg

mass of the plank m₂ = 162 kg

velocity of the girl with respect to surface = v₁

velocity of plank with respect to surface = v₂

v₁+ v₂ = 1.36

v₂ = 1.36 - v₁

applying conservation of momentum law to girl and plank.

m₁v₁ = m₂v₂

47.3 x v₁ = 162 x ( 1.36 - v₁ )

47.3 v₁ = 220.32 - 162v₁

209.3 v₁ = 220.32

v₁ = 1.05 m /s

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3 years ago

Two identical masses, A and B, slide down frictionless ramps, both starting at a height of 3M above the ground. Object A slides

balu736 [363]

Answer: c. Neither, they have the same speed.

In both the cases, there will be work done by the gravitational force. Since, the gravitational force is a conservative force, its work done does not depend on the path as it only depends on the initial and final position of the objects. Since, the initial and final positions are same for both the objects, the work done by gravitational force will be same in both the cases.

Hence, Work done by gravitational force = Change in the kinetic energy

So, the kinetic energy will be same for both the object.

Since, the masses are same: Kinetic energy = $\frac{1}{2}mv^2$