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telo118 [61]
2 years ago
6

Two construction cranes are used to lift identical 1200-kilogram loads of bricks the same vertical distance. The first crane lif

ts the bricks in 20. Seconds and the second crane lifts the bricks in 40. Seconds. Compared to the power developed by the first crane, the power developed by the second crane is.
SAT
1 answer:
Murljashka [212]2 years ago
6 0

The power developed by the second crane is half that of the first crane.

<h3>Power</h3>

Power is the ratio of the amount of energy to the total time. It is given by:

Power = Energy / time

Energy = mass * g * h

Let g represent the acceleration due to gravity and h the vertical height, for the first crane:

Power = 1200gh/20

For the second crane:

Power = 1200gh/40

Ratio of power in second crane to that of first = (1200gh/40) / (1200gh/20) = 0.5

The power developed by the second crane is half that of the first crane.

Find out more on Power at: brainly.com/question/24898587

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Which statement best describes an oxidation-reduction reaction.
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1. The correct statement that describes a Redox reaction is ( D ) ; A chemical reaction in which electrons are transferred between reactants.

2. The chemical formula that shows the correct subscripts is ( D ) BeF₂

3. The type of reaction that is shown is ; ( C ) decomposition reaction

A Redox reaction ( oxidation-reduction reaction ) involves the exchange/transfer electrons between reactants and the change in the oxidation number of the molecules involved in the reaction changes when an electron is either gained or lost.  

Given that the Be has four ( 4 ) electrons and Fluorine has nine ( 9 ) electrons when they  combine Fluorine will be left with an excess of electrons therefore the correct chemical formula will be BeF₂

The breaking up of an element into its smaller parts in a chemical reaction is known as a decomposition reaction.

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3 years ago
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1. Is there something wrong with the friend's response to your mother's hospitality? 2. Is there something problematic about you
Oksi-84 [34.3K]

Based on the information given, there's something wrong with the response of the friend towards the hospitality shown to him.

<h2>What is hospitality?</h2>

From the question, it was stated that a friend came visiting and the friend's mum was hospitable to him and cooked for him. He wanted to pay for the food when he gets as he was going and this is wrong.

It's problematic that the friend is asking for payment for her loving presence. This illustrates that he hasn't been shown kindness or has probably been paying for things and doesn't have loving people around him.

In conclusion, it's awkward because one isn't meant to pay for a hospitable act.

Learn more about hospitality on:

brainly.com/question/22080023

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Which of the following examples is from the lower paleolithic period?.
Solnce55 [7]

Answer:

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