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4 years ago

The metric system is also known as_____??? I need a word that has 8 letters in it...

Physics

1 answer:

satela [25.4K]4 years ago

6 0

Answer:

International System of Units is all that i could find

Explanation:

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Jeff is part of a trekking team. As he climbs a hill, he drops his water bottle, which has a mass of 0.25 kilograms.

yulyashka [42]

The vertical height from where Jeff dropped the bottle is 10m.

<h3>What is free falling?</h3>

When an object is released from rest in free air considering no friction, the motion is depend only on the acceleration due to gravity, g.

If we drop an object of mass m near the Earth surface from a height h, it has initial mechanical energy(P.E) of

U =mgh

When the object strikes the ground, all the potential energy converted into kinetic energy.

k.E = 1/2mv²

where v is the speed just before hitting the ground.

From energy conservation principle, initial and final mechanical energy are equal.

mgh = 1/2mv²

Given is Jeff climbs a hill. He drops his water bottle, which has a mass of 0.25 kilograms. The bottle slides down the hill and is moving at a velocity of 14 meters/second the instant it hits the ground.

The height from which bottle could fall is

h = v²/2g

Substitute the values, we get

h = (14)²/(2x9.81)

h =9.99 m

Thus, vertical height from where Jeff dropped the bottle is approximately 10m.

Learn more about free falling.

brainly.com/question/13299152

#SPJ1

8 0

2 years ago

Why is boiling water considered a physical change?

Liono4ka [1.6K]

Answer:

Boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water.

(credits to lumenlearning)

Explanation:

7 0

3 years ago

Read 2 more answers

Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the ________ period d

Naddika [18.5K]

Answer:

Latent period.

Explanation:

Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the Latent period during which the events of excitation-contraction coupling occur.

The period of incubation, the interval preceding exposure to a pathogen, toxin or radiation, and when effects occur. Muscle contracting, the time between a nerve stimulus, and muscle contraction.

5 0

3 years ago

Balance the following equation Choose "blank" if no coefficient other than lis needed

AleksAgata [21]

Answer:its b

Explanation:

7 0

3 years ago

A playground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. A 63.0-kg child, initially at the top, slide

mario62 [17]

Answer:

initial: 1654.6 J, final: 0 J, change: -1654.6 J

Explanation:

The length of the slide is

L = 8.80 ft = 2.68 m

So the height of the child when he is at the top of the slide is (with respect to the ground)

$h = L sin \theta = (2.68 m)sin 25.0^{\circ}=1.13 m$

The potential energy of the child at the top is given by:

$U = mgh$

where

m = 63.0 kg is the mass of the child

g = 9.8 m/s^2 is the acceleration due to gravity

h = 1.13 m

Substituting,

$U=(63.0 kg)(9.8 m/s^2)(2.68 m)=1654.6 J$

At the bottom instead, the height is zero:

h = 0

So the potential energy is also zero: U = 0 J.

This means that the change in potential energy as the child slides down is

$\Delta U = 0 J - (1654.6 J) = -1654.6 J$

7 0

3 years ago