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igomit [66]
3 years ago
12

Identify three pieces of evidence that indicate the continents were once closer than they are today

Physics
1 answer:
nadya68 [22]3 years ago
3 0

Answer:

fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.

Explanation:

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A scientist who studies teenage behavior was interested in determining if teenagers spend more time playing computer games then
natita [175]

Answer:

greater than 0.10

Explanation:

The null hypothesis is:

H_{0} = 10.2

The alternate hypotesis is:

H_{1} > 10.2

Our test statistic is:

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the statistic, \mu is the mean, \sigma is the standard deviation and n is the size of the sample.

We have that:

t = 0.45

We are testing if X is greater than 0.45, so our pvalue is 1 subtracted by the pvalue of z = t = 0.45.

z = 0.45 has a pvalue of 0.6736

1 - 0.6735 = 0.3264

So our pvalue is 0.3264, which is greater than 0.10.

So the correct answer is:

greater than 0.10

7 0
3 years ago
The car A has a weight of 4000 lb and is traveling to the right at 3 ft/s. Meanwhile a 2000 lb car B is traveling at 6 ft/s to t
iVinArrow [24]

To solve this problem we should apply Newton's third law for which it is defined that there must be an equal reaction in the opposite direction.

From this law, if Car A generates a force on car B, that car must have opposed a force exactly the same but in the opposite direction. The car A moved to the left and generates a force of 900lb so the magnitude of the force in the car B is also 900lb but to the right (opposite direction to the first car)

The correct option is 900lb to the right.

6 0
3 years ago
Find the x and y components of each of the following vectors.
Furkat [3]

Answer:

x =

- 15 \times \frac{ \sqrt{3} }{2}  \frac{m}{s}

y = 7.5m/s

8 0
3 years ago
How do convection currents form in air?
Kisachek [45]

Convection currents form when you have a liquid or gas have regions with a difference in temperature and there is a heat source feeding the system. Colder areas are going to want to fall and hotter regions want to rise.
8 0
3 years ago
What is defined as a special kind of systematic observation, used by correlational researchers,
erica [24]

Longitudinal design is defined as a special kind of systematic observation, implemented by correlational researchers, which involves the tasks of obtaining measures of variables of interest in multiple waves over time.

<u>Explanation: </u>

Longitudinal design is one of the known systematic observation pattern followed by the correlational researchers in which a subject of experiment is observed for a significantly long span.

The three types of longitudinal design are: panel study, cohort study and retrospective study. The complete design involves the multiple set of observations over a variable or subject. Longitudinal design is often used in clinical psychology to study rapid fluctuations in the behaviour.

7 0
4 years ago
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