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3 years ago

List the metric base units for the following:

2 answers:

7 0

The base unit for length is meters, which can be compared to yards in the American system.

Generally length and distance mean the same thing, but seeing as they are listed separately here I will assume it means distance as in travel. The metric system used kilometers for distance, which can be compared to American miles.

The mass of objects is measured in grams, which is sort of like ounces in the American system.

Finally, temperature is measured in Celsius, which is Fahrenheit with the American system.

77julia77 [94]3 years ago

4 0

Meter
meter
gram
Celsius

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What is beats means and its equation

Debora [2.8K]

When a crest-trough meet the interference produced will be destructive in nature hence they both will cancel out and the amplitude produced will be equal to zero hence the loudness will reduce to zero.

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2 years ago

A worker lifts a 20.0-kg bucket of concrete from the ground up to the top of a 25.0-m tall building. The bucket is initially at

yuradex [85]

Answer:

Minimum work = 5060 J

Explanation:

Given:

Mass of the bucket (m) = 20.0 kg

Initial speed of the bucket (u) = 0 m/s

Final speed of the bucket (v) = 4.0 m/s

Displacement of the bucket (h) = 25.0 m

Let 'W' be the work done by the worker in lifting the bucket.

So, we know from work-energy theorem that, work done by a force is equal to the change in the mechanical energy of the system.

Change in mechanical energy is equal to the sum of change in potential energy and kinetic energy. Therefore,

$\Delta E=\Delta U+\Delta K\\\\\Delta E= mgh+\frac{1}{2}m(v^2-u^2)$

Therefore, the work done by the worker in lifting the bucket is given as:

$W=\Delta E\\\\W=mgh+\frac{1}{2}m(v^2-u^2)$

Now, plug in the values given and solve for 'W'. This gives,

$W=(20\ kg)(9.8\ m/s^2)(25\ m)+\frac{1}{2}(20\ kg)(4^2-0^2)\ m^2/s^2\\\\W=4900\ J +160\ J\\\\W=5060\ J$

Therefore, the minimum work that the worker did in lifting the bucket is 5060 J.

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2 years ago

Refer to the diagram to answer the question. Which part of the eye enables it to focus? A B C D E

Ilia_Sergeevich [38]

Answer:

what are the A B C D E

Explanation:

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2 years ago

A steel rod has a diameter of 3.75cm.Express it's diameter in millimeters and meter

romanna [79]

Answer:

3.75cm into millimetres

= 3.75 * 10

37.5 millimetres

3.75 cm into metres

3.75/100

= 0.0375m

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3 years ago

An airplane of mass 39,043.01 flies horizontally at an altitude of 9.2 km with a constant speed of 335 m/s relative to Earth. Wh

Likurg_2 [28]

Answer:

1.2 x 10¹¹ kgm²/s

Explanation:

m = mass of the airplane = 39043.01

r = altitude of the airplane = 9.2 km = 9.2 x 1000 m = 9200 m

v = speed of airplane = 335 m/s

L = Angular momentum of airplane

Angular momentum of airplane is given as

L = m v r

Inserting the values

L = (39043.01 ) (335) (9200)

L = (39043.01 ) (3082000)

L = 1.2 x 10¹¹ kgm²/s

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2 years ago