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3 years ago

Explain the difference between the precision and accuracy of an experiment.

Physics

1 answer:

krek1111 [17]3 years ago

8 0

Answer:

Accuracy is defined as the extent up to which the calculated value is close to the actual value.

Precision is calculated after several experiments, it is the repeatability of the result. It measures the extent up to which the result is close to each other.

Closer the measurement more accurate is the measurement.

Less is the variation from the exact value more is the Precision.

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Suppose that the ultrasound source placed on the mother's abdomen produces sound at a frequency 2 MHz (a megahertz is 10^610 6

ella [17]

Answer:

the maximum frequency observed is 2.0044 10⁶ Hz

Explanation:

This is a Doppler effect exercise. Where the emitter is still and the receiver is mobile, therefore the expression that describes the process is

f ’= $f_o \ ( \frac{v \pm v_o}{v} )$

the + sign is used when the observer approaches the source

typical speeds of a baby's heart stop are around 200 m / min

let's reduce to SI units

v₀ = 200 m / min (1 min / 60 s) = 3.33 m / s

let's calculate

f ’= 2 10⁶ ( $\frac{1500 \ \pm 3.33}{1500}$ )

f ’= 2.0044 10⁶ Hz

f ’= 1,9956 10⁶ Hz

therefore the maximum frequency observed is 2.0044 10⁶ Hz

8 0

3 years ago

The collision and joining of crustal fragments to a continent is called continental _____.

astra-53 [7]

<h3>Answer;</h3>

Continental accretion

<h3>Explanation;</h3>

The collision and joining of crustal fragments to a continent is called the continental accretion.
Accretion is the process through which materials such as sediment, volcanic arcs, or seamounts or blocks, etc. are added to the tectonic plate or land mass. Many astronomical bodies, such as stars, galaxies or planets are formed by this process.

Where the process of accretion has occurred the tectonic plates may have dense basaltic rocks which are indicative of oceanic lithosphere.

3 0

3 years ago

Question 4 (1 point) ✓ Saved

Kamila [148]

Probably false. but correct me if i’m wrong

6 0

3 years ago

Write a hypothesis for Part II of the lab, which is about the relationship described by F = ma. In the lab, you will use a toy c

Tanzania [10]

If you increase the mass m of the car, the force F will increase, while acceleration a is kept constant. Because F and m are directly proportional.
If you increase the acceleration a of the car, the force F will increase, while mass m is kept constant. Because F and a are directly proportional.

How can Newton's laws be verified experimentally; is by setting this experiment, and changing one variable while keeping the other constant, then observe the change in F.

Hope this helps.

5 0

3 years ago

Read 2 more answers

A 710 kg car drives at a constant speed of 23 m/s. It is subject to a drag force of 500 N. What power is required from the car's

inn [45]

Explanation:

Given that,

Mass of the car, m = 710 kg

Speed of the car, v = 23 m/s

Drag force, F = 500 N

(a) Let P is the power is required from the car's engine to drive the car on the level ground. Power is given by :

$P=F\times v\\\\P=500\ N\times 23\ m/s\\\\P=11500\ W$