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3 years ago

In order to be considered science, a body of knowledge must be

2 answers:

6 0

Science is a body of knowledge about the natural world around us. This knowledge is a result of groups and individuals making observations, testing predictions, and using rational thinking to better understand what was happening in the world around them.

Observable and testable "B"

A body of knowledge must be _________ in order to be considered science. (1 point)

a realistic and reliable.

b observable and testable.

c factual and testable.

d believable and reliable.

Ne4ueva [31]3 years ago

3 0

<span>In order to be considered science, a body of knowledge
must be testable and observable. (D)</span>

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What year will y'all graduate

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I will graduate on the year 2022

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3 years ago

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3 years ago

A synthesis reaction occurs when a substance breaks down into two or more simple

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A car with a mass of 710 kg is traveling at 37 km/hr. It accelerates to a speed of 120 km/hr in 12.6 seconds. What is the net fo

guajiro [1.7K]

Answer: The net force acting on the car 1,299.3 N.

Explanation:

Mass of the car = 710 kg

Initial velocity of the car of the ,u= 37 km/h= 10.27 m/s $(1km\h=\frac{5}{18} m/s)$

Final velocity of the car,v = 120 km/h = 33.33 m/s

time taken b y car = 12.6 sec

v-u=at

$33.33m/s-10.27m/s=23.06 m/s=a(12.6 sec)$

$a = 1.83 m/s^2$

$Force=mass\times acceleration$

$Force=710 kg\times 1.83 m/s^2$

$Force=1,299.3 N$

The net force acting on the car 1,299.3 N.

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3 years ago

A crowbar 2727 in. long is pivoted 66 in. from the end. What force must be applied at the long end in order to lift a 600600 lb

NikAS [45]

To solve this problem we will apply the concepts related to equilibrium, for this specific case, through the sum of torques.

$\sum \tau = F*d$

If the distance in which the 600lb are applied is 6in, we will have to add the unknown Force sum, at a distance of 27in - 6in will be equivalent to that required to move the object. So,

$F*(27-6)= 6*600$

$F = \frac{6*600}{21}$

$F= 171.42 lb$

So, Force that must be applied at the long end in order to lift a 600lb object to the short end is 171.42lb

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3 years ago