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Leto [7]
3 years ago
11

A boat travels 90 m in 10 seconds, what is its speed? 90 m/s 9 mi/hr 9 m/s 900 m/s

Physics
1 answer:
rodikova [14]3 years ago
8 0

Answer:

it is 9m/s , hope it helps

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Three ropes A, B and C are tied together in one single knot K. (See figure.)
masha68 [24]

The tension in the rope B is determined as 10.9 N.

<h3>Vertical angle of cable B</h3>

tanθ = (6 - 4)/(5 - 0)

tan θ = (2)/(5)

tan θ = 0.4

θ = arc tan(0.4) = 21.8 ⁰

<h3>Angle between B and C</h3>

θ = 21.8 ⁰ + 21.8 ⁰ = 43.6⁰

Apply cosine rule to determine the tension in rope B;

A² = B² + C² - 2BC(cos A)

B = C

A² = B² + B² - (2B²)(cos A)

A² = 2B² - 2B²(cos 43.6)

A² = 0.55B²

B² = A²/0.55

B² = 65.3/0.55

B² = 118.73

B = √(118.73)

B = 10.9 N

Thus, the tension in the rope B is determined as 10.9 N.

Learn more about tension here: brainly.com/question/24994188

#SPJ1

6 0
2 years ago
Find the acceleration of a forklift of mass 1400 kg pushed by a force of 2100 N that is opposed by friction force of 425 N
pantera1 [17]
(2100N-425N)/1400kg=1.19m/s
7 0
3 years ago
Suppose a ray of light traveling in a material with an index of refraction n a reaches an interface with a material having an in
KATRIN_1 [288]

Answer: C and D

Explanation: One of the first rule for total internal reflection to occur is that the ray must move from a dense to a less dense medium, hence refractive index of medium a must be greater than that of b.

When a ray moves from a dense to a less dense medium, the refracted ray moves away from the normal thus increasing the size of the angle of refraction (total internal refraction occurs when the angle of refraction is 90° and the angle of incidence at this point is known as the critical angle), hence the angle of incidence must be greater than the critical angle.

These points verifies option C and D

5 0
3 years ago
Part B Next you'll investigate how precipitation varies throughout Earth. Visit the My NASA Data e website and select Data Set i
Lera25 [3.4K]

The patterns you see in the precipitation on Earth are that it is often distributed evenly or unevenly via:

  • Geographical method
  • Temporal method
  • Seasonal method

<h3>What is the pattern of precipitation on earth?</h3>

The yearly precipitation over the Earth is found to be approximately about 100 cm (that is 39 inches).

Note that is one that is often distributed unevenly. The areas of highest rainfall is known to be in the equatorial zone and the monsoon area of Southeast Asia.

Learn more about precipitation from

brainly.com/question/1783904

#SPJ1

6 0
2 years ago
Se usa una bombona de He para inflar globos, de volumen 15L con una presión de 200 atm. Si los globos tienen un volumen de 1.5L
Bingel [31]

Answer:

La cantidad de globos llenos es de aproximadamente 1.974 globos

Explanation:

Los parámetros dados son;

El gas utilizado para inflar el globo = Él

El volumen del gas He, V₁ = 15 L

La presión del gas He, P₁ = 200 atm = 20,265,000 Pa

El volumen de cada globo = 1,5 L

La presión del He dentro del globo, P₂ = 770 mmHg = 102,641 Pa

Sea 'V₂', que represente el volumen total que el gas ocupa en todos los globos, y 'x', que represente el número de globos;

Por lo tanto, tenemos;

1,5 · x = V₂

Según la ley de Boyle, tenemos;

P₁ · V₁ = P₂ · V₂

∴ V₂ = P₁ · V₁ / (P₂)

Al introducir los valores conocidos, obtenemos;

V₂ = 20,265,000 Pa × 15 L / (102,641 Pa) = 2,961.53548 L

1,5 L × x = V₂

∴ 1,5 L × x = 2,961,53548 L

x = 2,961.53548 L / (1.5 L) = 1,974.35699 redondeamos hacia abajo para obtener un número entero de globos de la siguiente manera;

El número de globos, x ≈ 1,974 globos.

8 0
3 years ago
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