Physics, 05.11.2020 03:40 vicbar1024

Which of the following is the cause of an acceleration or a change in an object's motion?

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Answer from: kelsotay623

Net force causes an acceleration or change in the motion of an object.

Newton's first law of motion states that an object in a state of rest or uniform motion in a straight line, will continue in that state unless acted upon by an external force.

The second law states that the force applied to an object is directly proportional to the product of mass and acceleration of the object. The object tends to move in the direction of the net force.

Acceleration is defined the change in the velocity per change in the time of motion of the object.

$a = \frac{\Delta v}{\Delta t} \\\\$

where;

Δv is the change in velocity.

Thus, we can conclude that net force causes an acceleration or change in the motion of an object.

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Answer from: shelbie76

Net force should be the answer.

Explanation: Its not speed because speed can be constant, its not velocity because velocity can be constant as well. Plus velocity is just speed with direction. And its not inertia because inertia is an objects capacity to maintain its state of motion (at rest or in uniform motion)

Hope this helps! :)

Answer from: Quest

the grams of oxygen gas that can be produced is 20.6 grams of o₂

calculation

2liclo₃ → 2 licl + 3 o₂

step 1: find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5 +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281 moles

step 2: use the mole ratio to calculate the moles of o2

from equation above, liclo₃: o₂ is 2: 3

therefore the moles of o₂=0.4281 moles x3/2 =0.6422 moles

step 3: find mass of o₂

mass= moles x molar mass

from periodic table the molar mass of o₂ = 16 x2= 32 g/mol

mass=0.6422 moles x 32 g/mol = 20.6 grams of o₂

Answer from: Quest

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

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