Mitchell records the amount of time a toy car takes to travel down a ramp one time for each of four slope angles. his lab partner, sarah, suggests that he run the same set of trials two more times. what arguments should sarah use to support her suggestion? check all that apply. more trials will prove the results. more trials will reduce mistakes. more trials will guarantee correct results. more trials will increase confidence in the results. more trials will identify other possible solutions.

More trials will increase confidence in the results

Explanation:

1) More trials will not prove the results , since doing more trials gives more data for the same experiment , but it will not tell us anything about the conditions that judge the validity of the hypothesis.

2) More trials will not reduce mistakes , but it will help us to identify if there was a mistake in one of the trials → if there is 1 result that deviates significantly from the other 2

3) More trials will not guarantee correct results →  since there is always deviations to the right value

4) More trials will increase the confidence in the results →  since more trials will focus the mean of the results into the right value ( will reduce the standard deviation of the mean).

5) More trials will not help us to identity other possible solutions → since more trials will gives us more data of the same experiment under the same conditions , but it will not analyse the results.

Experiments needs to be as accurate and precise as possible. Accuracy and precision helps to keep errors within reasonable limits as they are unavoidable.

How do can we now obtain an accurate and precise result?

After checking that all sources of errors are kept at bay and the procedures perfectly matches the hypothesis being test, it is best to repeat the experiment a few number of times.

Repeating an experiment is scientifically permitted as it helps to eliminate error to a reasonable extent.

Repeating an experiment will also help to authenticate Mitchell's claim and provide a confidence limit to draw a sound conclusion from.

From the repeated results, some statistical parameters that further provide solid backing for the hypothesis being tested will surface.

One of the key attribute of a hypothesis to be acceptable as being valid is that it must be repeatable.

you go to your settings preference and in the end youll see sth that says "i want to delete my acc" click on it and u'll acc will be deleted but u have to wait.

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft