All categories

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.

You might be interested in

A ball is kicked at 30.0 m/s at an angle of 20.0°. Beneath the tilted columns calculate the vertical and horizontal components.

RSB [31]

The velocities at time t are

• Horizontal:

v = (30.0 m/s) cos(20.0º)

• Vertical:

v = (30.0 m/s) sin(20.0º) - g t

(where g = 9.80 m/s² is the magnitude of the acceleration due to gravity)

If you only want the initial velocities, they are

• Horizontal:

v = (30.0 m/s) cos(20.0º) ≈ 28.2 m/s

• Vertical:

v = (30.0 m/s) sin(20.0º) ≈ 10.3 m/s

(just set t = 0)

As far as starting equations go, you can derive everything from the definition for average acceleration:

a = ∆v / ∆t = (final v - initial v) / t

→ v = u + a t

(here, u stands in for "initial v" and v is simply velocity at time t )

There is no acceleration in the horizontal direction, while the ball is essentially in free-fall in the vertical direction.

6 0

3 years ago

Calculate the magnitude of the focal length and power of a spherical mirror that has a radius of 5.00 cm.

yarga [219]

Answer:

2.5 cm

40 D

Explanation:

When the radius of curvature of a lens is divided by 2 we get the focal length of the lens.

Focal length is given by

$f=\dfrac{R}{2}\\\Rightarrow f=\dfrac{5}{2}\\\Rightarrow f=2.5\ cm$

The focal length of the lens is 2.5 cm

When we divide 1 by the focal length in the unit of meters we get the power of a lens

Power of a lens is given by

$P=\dfrac{1}{f}\\\Rightarrow P=\dfrac{1}{0.025}\\\Rightarrow P=40\ D$

The power of the lens is 40 D

5 0

4 years ago

The gold-like mineral in the metamorphic rock pictured below is known as pyrite. When pyrite is exposed to air and water it can

andreyandreev [35.5K]

Answer: C. Chemical Weathering

Explanation:

3 0

3 years ago

Read 2 more answers

Which of the following is true of children with chronic illness? a.) They are all eligible to recievie special education service

ss7ja [257]

Answer:

c.) Their eligibility for social education services depends on whether their conditions adversely affect their educational functioning.

Explanation:

Chronic Illness is a human health condition in which a particular (or number of) illness is persistent in the body and the effects on the body are long-lasting and are often resistant to treatment. The word chronic is usually used when the disease/illness/sickness and its effects stay in the body for more than three months.

The likeliest answer from the options given is option C because before social education services are given, it has to be decided if their health condition adversely affects their education.

5 0

3 years ago

A. Does this graph represent an endothermic or an exothermic reaction? Explain your answer.

ra1l [238]

Answer:

Exothermic reaction

Explanation:

Exothermic reaction relases energy while endothermic absorbs energy.

8 0

3 years ago