When a rocket lifts off what provides the momentum match of the upper lift

1 answer:

5 0

The momentum of the mass expelled in the opposite direction ... the rocket-engine exhaust, or the ionized matter expelled from an ion drive.

THAT's why every propulsion engine has outlet nozzles designed with super-high-intensity math, to achieve the highest possible velocity for the mass that gets shot out the back ... so that it will carry the maximum possible momentum.

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Why is magnesium the limiting reactant in this experiment

Keith_Richards [23]

Answer:

Explanation:

Magnesium is being oxidized by the oxygen in the air to magnesium oxide. This is a highly exothermic combustion reaction, giving off intense heat and light. The reaction of the combustion of magnesium in oxygen is given below:

2Mg(s) + O2(g) → 2MgO(s)

The stoichiometric factor is 2 moles of magnesium are burned for every 1 mole of oxygen (2mol Mg/1mol O2). If the magnesium strip weighs 1 gram, then there is 0.04 mol of magnesium (1 gram divided by 24.3 grams/mol Mg) available in the reaction. The amount of oxygen required to completely react with the magnesium strip is:

0.04 mol Mg x (1 mol O2 / 2 mol Mg) = 0.02 mol O2 x 16 g/mol O2 = 0.32 gram O2.

The magnesium will burn until consumed entirely. There is much more oxygen available in the atmosphere than needed to consume the magnesium. Thus the magnesium is the limiting reactant because it determines the amount of product formed.

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3 years ago

50 N of force is exerted on a crate. It accelerates at a rate of 1.2 m/s/s. Calculate its mass

vitfil [10]

Answer:

m = F/a = 50 / 1.2 = 41.6666.... 42 kg

Explanation:

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3 years ago

A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car. During the collision:

dexar [7]

Answer:

B. the force of on the truck due to the collision is exactly equal to the force on the car.

Explanation:

At the time of collision between two objects of unequal or equal masses two forces emerge at the point of collision .They are called action and reaction force . According to third law of Newton , they are equal . So in the instant case of collision between car and truck , force on both of them will be equal.

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3 years ago

What is the speed of sound in solid? <br>

sasho [114]

The speed of sound in a solid would be 6000 metres per second

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Plzz answer this question correctly

Lelechka [254]

Answer:

I'm not sure sorry.... shshsjsk

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3 years ago