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3 years ago

What are the phenomena that physics in applied in ?

Physics

1 answer:

Deffense [45]3 years ago

3 0

Answer:

For empiricists like van Fraassen, the phenomena of physics are the appearances observed or perceived by sensory experience. Constructivists, however, regard the phenomena of physics as artificial structures generated by experimental and mathematical methods.

Explanation:

<h3>I hope it's help u </h3><h3>Have a great day </h3>

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50 POINTS! A supplier wants to make a profit by buying metal by weight at one altitude and selling it at the same price per poun

Tems11 [23]

Choice A is the right answer! Buy at high altitude and sell at low altitude

Hope this helps :)

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3 years ago

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Indicate whether each source is reliable or unreliable

Alex73 [517]

Answer:

1.reliable

2.unreliable

3.unreliable

4.reliable

5.reliable

Explanation: edg 2020

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3 years ago

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A 1 170.0 kg car traveling initially with a speed of 25.000 m/s in an easterly direction crashes into the back of a 9 800.0 kg t

kykrilka [37]

Explanation:

It is given that,

Mas of the car, $m_1=1170\ kg$

Initial speed of the car, $u_1=25\ m/s$

Mass of the truck, $m_2=9800\ kg$

Initial speed of the car, $u_2=20\ m/s$

Final speed of the car, $v_1=18\ m/s$

(a) It is a case of elastic collision. Let $v_2$ is the final velocity of the truck right after the collision. Using the conservation of linear momentum to find it :

$m_1u_1+m_2u_2=m_1v_1+m_2v_2$

$v_2=\dfrac{m_1u_1+m_2u_2-m_1v_1}{m_2}$

$v_2=\dfrac{1170\times 25+9800\times 20-1170\times 18}{9800}$

$v_2=20.83\ m/s$

(b) Initial kinetic energy is given by :

$k_i=\dfrac{1}{2}(m_1u_1^2+m_2u_2^2)$

$k_i=\dfrac{1}{2}\times (1170\times (25)^2+9800\times (20)^2)$

$k_i=2325625\ J$

Final kinetic energy is given by :

$k_f=\dfrac{1}{2}(m_1v_1^2+m_2v_2^2)$

$k_f=\dfrac{1}{2}\times (1170\times (18)^2+9800\times (20.83)^2)$

$k_f=2315595.61\ J$

The change in mechanical energy of the car truck system in the collision:

$\Delta K=k_f-k_i$

$\Delta K=2315595.61-2325625$

$\Delta k=-10029.39\ J$

The loss in kinetic energy is 10029.39 Joules.

Hence, this is the required solution.

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3 years ago

The stone in the accompanying ﬁgure can be carried from the bottom to the top of a cliff by various paths. Which path requires m

maxonik [38]

The choice of path should make no difference. The work should depend only on the end points and not on the route between them. But just to make sure, could we please have a look at the accompanying figure ?

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3 years ago

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A barge ﬂoating in fresh water (p = 1000 kg/m3) is shaped like a hollow rectangular prism with base area A = 550 m2 and height H

Karolina [17]

Answer:

a) $\Delta m = 330000\,kg$ , b) $h = 1.268\,m$

Explanation:

a) According the Archimedes' Principle, the buoyancy force is equal to the displaced weight of surrounding liquid. The mass of the coal in the barge is:

$\Delta m \cdot g = \rho_{w}\cdot g \cdot \Delta V$