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3 years ago

Answer the following questions. Use complete sentences.

Physics

1 answer:

k0ka [10]3 years ago

8 0

Answer:

The motion of a projectile consists of two independent motions:

- A uniform motion (constant velocity) along the horizontal direction

- A uniformly accelerated motion (constant acceleration, equal to the acceleration due to gravity) along the vertical direction

In terms of vectors, we have the following:

Velocity:

- The horizontal velocity does not change - therefore, this vector is constant

- The vertical velocity changes, as the vertical motion is accelerated - therefore, this vector changes. This is because there is a downward force acting on the projectile, the force of gravity.

Acceleration:

- There is no acceleration along the horizontal direction, so here the vector is zero

- The acceleration along the vertical direction is constant, and it is $9.8 m/s^2$ in the downward direction (acceleration due to gravity)

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Now, let's see what happens when the cannon is high above the ground. Click on the cannon, and drag it upward as far as it goes

kipiarov [429]

Answer:

Explanation:

Range in projectile is defined as the distance covered in the horizontal direction. It is expressed as R = U²sin2Ф/g

U is the initial velocity of the body (in m/s)

Ф is the angle of projection

g is the acceleration due to gravity.

Given U = 14m/s, g = 9.8m/s and range R = 15 m

we will substitute this value into the formula to get the projection angle Ф as shown;

15 = 15²sin2Ф/9.8

15*9.8 = 15²sin2Ф

147 = 225sin2Ф

sin2Ф = 147/225

sin2Ф = 0.6533

2Ф = sin⁻¹0.6533

2Ф = 40.79°

Ф = 40.79°/2

Ф = 20.39° ≈ 20°

Hence, the range is greatest at angle 20°

5 0

3 years ago

a standing wave in a pipe with both ends open has a frequency of 348. hz. the next higher harmonic has a frequency of 522. hz.

miskamm [114]

Answer:

A pipe open at both ends would have an antinode at each end and its length would be λ/ 2

The next such points would be λ and 3 λ / 2

The ratio of 522 / 348 is 1.5 so the harmonic at 348 is one wavelength and the next harmonic is 3 λ / 2 at 1 1/2 wavelengths

348 hz would occur at one wavelength

f λ = v = f L where the length of the pipe is one wavelength

if we use 331 as the speed of sound then

L = 331 / 348 = .95 m for the length of the pipe

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2 years ago

Eric is creating a timeline of the formation of the solar system. Which sequence best describes the formation of the solar syste

vlada-n [284]

The answer is C. nebular are star nurseries. When the massive gas being collapsing in its own weight. Local areas of gas begin to coalesce under gravity. Due to enormous pressure, nuclear fusion begins and a protostar is formed. The protostar grows into the sun as more hydrogen fuses at the core. The planetesimal materials at the edges of the protostellar discs coalesce to form planets that orbit the star.

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3 years ago

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Acid rain is an example of which type of chemical weathering?

tino4ka555 [31]

The answer is Carbonic acid

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3 years ago

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A large negatively charged object is placed on a wooden table. A neutral metallic ball rolls straight towards the object but sto

bazaltina [42]

Answer:

the charge of each small sphere, which is + Q / 2

Explanation:

For this exercise we must use the fact that a charged object induces charges on nearby bodies

Induced charge comes from the fact that charges of the same sign repel and charges of different signs attract.

In this case the large, fixed ball with a -Q charge induces a positive charge in the nearest part and the negative charges are repelled to the furthest point, but the net charge on the metallic sphere remains zero. It should be emphasized that since the charges are of different signs, there is an attractive force between the two spheres.

This first metallic sphere now has a negative charge on the back, this charge induces a positive charge on the second sphere, as the charges are of a different sign, they attract each other, which is why the force is attractive.

When the first sphere stops the second sphere hits it, at this moment the charge of the two spheres is equal, therefore the induced charge in the two spheres is + Q. When the two spheres are separated, the charge on each of them is half, that is, the sphere has a charge + Q / 2 and the second sphere has a charge + Q / 2.

Therefore the first sphere is subjected to two forces: an attractive force with the large sphere of charge -Q and a repulsive force with the second sphere of charge + Q / 2.

So the first sphere must approach the big ball and the second sphere must move away from the big sphere.

This is the process of the movement of this exercise, unfortunately the statements with which to compare this process do not appear, but one of the most common questions of what is the charge of each small sphere, which is + Q / 2

4 0

3 years ago