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Fantom [35]
3 years ago
7

Using the data set (SCHL.Txt), investigate the effect of the categorical predictor schl (School location: 1 = Urban; 2 = Suburba

n; 3 = Rural) on the continuous outcome math (Math Scores).
SAT
1 answer:
enot [183]3 years ago
7 0

Answer:

As space expanded, the universe cooled and matter formed

Explanation:

Amount of time=2.5 hoursamount of time after speed increase=2 hourslet x=the initial speedlet t=the amount of hourslet y=the new speed let z=distance therefore xt=zyt=zplugging everything in,x(2.5)=zy(2)=zusing substitution y=20+x2.5x=z(20+x)(2)=z40+2x.5x=40x=80y=x+20y=100

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The picture below is limestone. That's the rock used to form caves. 

Hope that helps! -UF aka Nadia
</span>

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3 years ago
4 features of bacteria that enable them to survive.
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Answer:

Specific structural features that enable prokaryotes to thrive in diverse environments include their cell walls (which provide shape and protection), flagella (which function in directed movement), and ability to form capsules or endospores (both of which can protect against harsh conditions). Prokaryotes also possess biochemical adaptations for growth in varied conditions, such as those that enable them to tolerate extremely hot or salty environments.

Explanation:

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2 years ago
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3 years ago
Which ion in the ground state has the same electron configuration as an atom of neon.
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Answer:

Highlight to reveal answers and explanations

Questions Answer

38 Which ion in the ground state has the same electron configuration as an atom of neon in the ground state? (1) Ca2+ (2) Cl- (3) Li+ (4) O2-

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3 0
3 years ago
Which characteristics determine an element’s reactivity?.
kipiarov [429]

Answer:

En química, la reactividad de una especie química es su capacidad para reaccionar en presencia de otras sustancias químicas o reactivos (de diferente dominio químico).1​

Se puede distinguir entre la reactividad termodinámica y la reactividad cinética. La primera distingue si la reacción está o no favorecida por entalpía (competencia entre energía y entropía), es decir si es una reacción espontánea o no. La segunda distingue si la reacción tendrá lugar o no en una escala de tiempo dada.

De esta forma, existen reacciones termodinámicamente favorables pero cinéticamente impedidas, como la combustión de grafito en presencia de aire. En casos así, la reacción se dará de una forma muy lenta o, directamente, no se producirá. Si una reacción se encuentra bloqueada cinéticamente, es posible lograr que se produzca alterando las condiciones de reacción o utilizando un catalizador.

La química orgánica y la química inorgánica estudian la reactividad de los distintos compuestos. La fisicoquímica trata de calcular o predecir la reactividad de los compuestos, y de racionalizar los mecanismos de reacción.

Explanation:

8 0
3 years ago
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