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3 years ago

What is force? In physics class eleven

Physics

1 answer:

spayn [35]3 years ago

4 0

Answer:

Explanation:

In Physics, force is defined as: The push or pull on an object with mass that causes it to change its velocity. Force is an external agent capable of changing the state of rest or motion of a particular body. It has a magnitude and a directionForce is an external agent capable of changing the state of rest or motion of a particular body. It has a magnitude and a direction. The direction towards which the force is applied is known as the direction of the force and the application of force is the point where force is applied.

The Force can be measured using a spring balance. The SI unit of force is Newton(N).

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What is the most likely reason that horses and mountain goats have hooves?

Nastasia [14]

Answer:

They have homologous structures because they have a common ancestor.

Explanation:

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3 years ago

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The left side of the heart creates a pressure of 120 mm Hg by exerting a force directly on the blood over an effective area of 1

jeka57 [31]

Answer:

23.99N

Explanation:

Given:

Pressure created by the heart = 120mm of hg

converting the pressure into the standard unit of N/m²

1mm of hg = $\frac{1}{760}atm=\frac{1}{760}\times 1.013\times10^5N/m^2$

now, 120 mm of hg in N/m² will be

120mm of hg = $\frac{12}{760}\times 1.013\times10^5N/m^2$

also

given effective area = 15.0 cm² = 15 × 10⁻⁴m²

Now,

Force = Pressure × Area

thus,

Force exerted will be = $\frac{120}{760}\times 1.013\times10^5N/m^2$ × 15 × 10⁻⁴m²

Force exerted will be = 23.99N

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3 years ago

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An acorn falls from a tree and hits the ground in 0.8 s. How far did the acorn fall . Use g = 9.8 m/s^2. Round your final result

mylen [45]

The distance covered by the acorn is 3.136 m.

<u>Explanation:</u>

The time taken for the acorn to hit the ground is 0.8 s. As it is a free fall, the acorn will be completely under the influence of gravity. So the acceleration will be acceleration due to gravity.

Then using the second law of equation,

$s=ut+\frac{1}{2}gt^{2}$

Since the initial velocity and time is zero, then the time taken to reach the ground is stated as 0.8 s, so

$s=0+\left(\frac{1}{2} \times 9.8 \times 0.8 \times 0.8\right)=\frac{6.272}{2}=3.136 \mathrm{m}$

So the distance covered by the acorn is 3.136 m.

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4 years ago

In a standard gas grill propane tank, there is approximately 4,579 mL of propane (C3H8). At a temperature of 55˚C, the tank has

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Answer:

7300 mL

Explanation:

The question is a bit misleading, since tanks generally have a constant volume. But anyway, using ideal gas law:

PV = nRT

If amount of gas (n) is constant, then:

PV / T = constant

P₁V₁ / T₁ = P₂V₂ / T₂

(1798 kPa) (4579 mL) / (55 + 273) K = (1025 kPa) V / (25 + 273) K

V = 7298 mL

Rounded to two significant figures, the volume is 7300 mL.

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4 years ago

A rabbit hops through a vegetable garden. He first hops 2 m south, then 4 m west, then 3 m south, and finally 1 m east. What dis

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Answer:

Distance = 10m

Imagine a triangle

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Height = 2 + 2 =4

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4 years ago

What is force? In physics class eleven​

What is force? In physics class eleven