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DENIUS [597]
3 years ago
15

Joan is setting up an experiment in the lab to observe newton's second law of motion. she has a model car that has a mass of 45

kg, and it is accelerating at 7 m/s/s. she then increases the acceleration to 28 m/s/s. what happens to the force of the car?
Physics
1 answer:
Radda [10]3 years ago
8 0
The force of the car increases because it is proportional to the acceleration of the object (as stated in the second law). If the object accelerates then the force accelerates, if the acceleration decreases then the force decreases. Same for mass. The force of the car would have changed from 315 newtons of force to 1,260 newtons of force.
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Accuracy and precision
igomit [66]

Explanation:

measurement of a set, accuracy is closeness of the measurements to a specific value, while precision is the closeness of the measurements to each other.

Accuracy has two definitions:

More commonly, it is a description of systematic errors, a measure of statistical bias; low accuracy causes a difference between a result and a "true" value. ISO calls this trueness.

Alternatively, ISO defines[1] accuracy as describing a combination of both types of observational error above (random and systematic), so high accuracy requires both high precision and high trueness.

Precision is a description of random errors, a measure of statistical variability.

In simpler terms, given a set of data points from repeated measurements of the same quantity, the set can be said to be accurate if their average is close to the true value of the quantity being measured, while the set can be said to be precise if the values are close to each other. In the first, more common definition of "accuracy" above, the two concepts are independent of each other, so a particular set of data can be said to be either accurate, or precise, or both, or neither.

3 0
3 years ago
Several days after snowfall , the roofs of some homes on your street have almost no snow on them, while the roofs on other homes
Alina [70]

Explanation:

This due to thermal insulation of some of the roof.

An insulator is body is a poor conductor of heat and will require high thermal energy to cause temperature changes.

  • A house with a roof that is thermally insulated will have poor heat conduction.
  • Since little heat is conducted, there wont be enough thermal energy to melt the snow.
  • Thermal energy is directly related to heat.
  • A house that is not insulated will absorb a lot of heat.
  • This will cause the snow to melt very fast.

Learn more:

Electrical conductors and insulators brainly.com/question/3874443

#learnwithBrainly

5 0
3 years ago
What is a model drawing of 2HCI?
klasskru [66]
This is the answer just double it

7 0
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Is a copper wire a conductor or insulator?
irina [24]

Answer:

its a conductor because it conducts electricity

Explanation:

5 0
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people used to think that the sun moved around earth galileo proved this was wrong why is this important
tamaranim1 [39]
To approve to people that the Catholic Church was wrong but they threatened Galileo and he stop
6 0
3 years ago
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