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3 years ago

Which of the following is not a characteristic of S waves?

Physics

1 answer:

9966 [12]3 years ago

7 0

Number a is a correct one

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ElenaW [278]

Answer:

II) Kitchen waste: Meal leftovers, Banna peelings

Garden Waste: Camote leaves, Kangkong leaves, weeds

Factory: Glass bottles, carton pieces

III) A

IV) Home: Bottles of shampoo, leftover food, syringe

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Classroom: containers

Laboratory: empty cartridge

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2 years ago

Carbohydrates, fats, proteins: These organic molecules ALL have this element in common. This element can form multiple bonds, an

statuscvo [17]

Carbon is the answer. IF oxygen were on the list it would also be correct but for this its Carbon<span />

6 0

3 years ago

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What is a force that opposes motion between two surfaces that are in contact?

choli [55]

Answer:

Friction is a force that opposes motion.

8 0

2 years ago

12. A diagram of the Earth revolving around the sun shows that less direct sunlight is reaching the Northern Hemisphere than the

Natali [406]

The northern hemisphere season is summer

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2 years ago

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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.

7 0

2 years ago