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3 years ago

What is terminal velocity?

1 answer:

3 0

<span>the constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration.</span>

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A 2000 kg car experiences a constant braking

bezimeni [28]

Solving for acceleration:

F = ma
10000 = 2000*a
a = 5 m/s^2

Solving for velocity:

Vf = Vi + a(t)
0 = Vi - (5)(6)
Vi = 30 m/s

Solving for displacement or distance:

S = Vi*t - 1/2 * a * t^2
S = 30(6) - 1/2 (5)(6)^2
S = 90m

The car would have traveled 90m before coming to rest.

5 0

3 years ago

Why is hygiene a valued health practice in workout facilities?

MariettaO [177]

This is one method of how infectious diseases like skin infections spread. Keeping the gym clean is essential to maintaining everyone's health and safety.

<h3>Which skin illness is the worst?</h3>

Necrotising fasciitis is just a severe infection of the skin, including tissue beneath the skin, and the fascia (the fibrous tissue that divides muscles and organs), which causes necrosis, or the death of tissue. If not identified and treated promptly, the infection spreads quickly, is lethal.

<h3>A skin infection: how do you treat it?</h3>

Depending on the infection's origin and intensity, different treatments are available. It may take days or weeks for some viral skin infections to heal on their own. Antibiotics taken orally or administered topically to the skin are frequently used to treat bacterial infections.

To know more about skin infection visit;

brainly.com/question/7656575

#SPJ1

4 0

1 year ago

The density of a solid cube is 678.2 kg/m^3. (Note that each edge is 4.8 cm in length and the mass is 75g.) When the cube is pla

Galina-37 [17]

Answer:

Part a)

F = 0.735 N

Part b)

$percentage = 67.9%$

Explanation:

As we know that mass of the cube is given as

$M = \rho V$

$M = \rho a^3$

$M = (678.2) (4.8 \times 10^{-2})^3$

$M = 0.075 kg$

Now we know that cube is floating in the water

So net force due to weight of the cube must be counter balanced by buoyancy force on the liquid

so we have

$F_b = mg$

$F_b = 0.075 \times 9.81$

$F_b = 0.735 N$

Part b)

Percentage of volume submerged into the liquid is given as

$F_b = \rho V g$

$0.735 = 1000 V \times 9.8$

$V = 7.71 \times 10^{-5} m^3$

now percentage of submerged liquid is given as

$percentage = \frac{7.71 \times 10^{-5}}{(4.8 \times 10^{-2})^3}\times 100$

$percentage = 67.9%$

5 0

3 years ago

A star with no measurable parallax is very close to Earth. Please select the best answer from the choices provided T F

katrin [286]

A star with no measurable parallax is very close to Earth. The statement is FALSE because Parallax angles of less than 0.01 arcsec are too difficult to measure from Earth because of the effects of the Earth's atmosphere, <span>only the </span>closer<span> ones have a </span>parallax<span> that is large enough to be measured, a</span>nd the diameter of the Earth's orbit is small compared to the distance to all but the nearest stars.

6 0

3 years ago

Read 2 more answers

A beam of light traveling in air strikes a glass slab at an angle of incidence less than 90°. After entering the glass slab, wha

ad-work [718]

Answer:

True A and B

Explanation:

Let's propose the solution of the exercise before seeing the affirmations.

We use the law of refraction

n₁ sin θ₁ = n₂. Sin θ₂

Where n₁ and n₂ are the refractive indices of the two means, θ₁ and θ₂ are the angles of incidence and refraction, respectively

sin θ₂ = (n1 / n2) sin θ₁

Let's apply this equation to the case presented. The index of refraction and airs is 1 (n1 = 1)

Sin θ₂ = (1 / n2) sin θ₁

the angle θ₂ which is the refracted angle is less than the incident angle

Let's analyze the statements time

A. False. We saw that it deviates

B. True Approaches normal (vertical axis)

C. False It deviates, but it is not parallel to normal

D. False It deviates, but approaching the normal not moving away

E. True. Because its refractive index is higher than air,

8 0

3 years ago