Apa saja manfaat sumber daya hewan?

1 answer:

8 0

Hewan peliharaan, seperti ternak, memberi kita makanan, serat, dan kulit. Hewan liar, termasuk burung, ikan, serangga, dan penyerbuk, penting untuk mendukung jaring aktivitas dalam ekosistem yang berfungsi. Populasi tumbuhan dan hewan yang sehat sangat penting bagi kehidupan.

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A force of 150 N is used to push a motorcycle 10 m along a road in 20 s.

Grace [21]

Answer:

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7 0

2 years ago

A projectile is launched from ground level at an angle of 30 degrees above the horizontal. Neglect air resistance and consider t

Oduvanchick [21]

Answer:

just before landing the ground

Explanation:

Let the velocity of projection is u and the angle of projection is 30°.

Let T is the time of flight and R is the horizontal distance traveled. As there is no force acting in horizontal direction, so the horizontal velocity remains constant. Let the particle hits the ground with velocity v.

initial horizontal component of velocity, ux = u Cos 30

initial vertical component of velocity, uy = u Sin 30

Time of flight is given by

$T = \frac{2u Sin\theta }{g}$

Final horizontal component of velocity, vx = ux = u Cos 30

Let vy is teh final vertical component of velocity.

Use first equation of motion

vy = uy - gT

$v_{y}=u_{y}- g \times \frac{2u Sin\theta }{g}$

$v_{y}=u Sin 30 - 2u Sin 30$

vy = - u Sin 30

The magnitude of final velocity is given by

$v = \sqrt{v_{x}^{2}+v_{y}^{2}}$

$v = \sqrt{\left (uCos 30 \right )^{2}+\left (uSin 30 \right )^{2}}$

v = u

Thus, the velocity is same as it just reaches the ground.

6 0

3 years ago

The index of refraction of a substance is 1.5. Find the sine of the angle of refraction if the sine of the angle of incidence is

Mariulka [41]

We can answer the problem by Snell's Law:

Snell's law (also known as Snell–Descartes law and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.

7 0

3 years ago

Derive the formula v= u+ at please derive in detail

gogolik [260]

Lets do

We know

The rate of change of velocity is acceleration .

$\\ \sf\longmapsto a=\dfrac{dv}{dt}$