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makkiz [27]
3 years ago
9

A scientific hypothesis starts with the lowest level of acceptance but can become stronger as they are used and survive repeated

testing.
1)True
2)False
Physics
2 answers:
Studentka2010 [4]3 years ago
6 0

Answer: 1)True

Explanation:

A scientific hypothesis is a statement which is based on the the direct observation of a scientific event, process or phenomena. It can be based on the assumptions. It is testified using appropriate scientific methodology.

The scientific hypothesis can be proved to be negative or false but repeated experimental trials can prove a hypothesis true and acceptable.  

Pachacha [2.7K]3 years ago
3 0

Answer:

True.

Explanation:

Hypotheses are supposed to be tested, to be proven correct. They usually start from a small thought without 100% correct, but as you do further testing, they become stronger.

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Sobre un gas contenido en un cilindro provisto de un pistón se realiza un trabajo de 7000 Joules, mediante un proceso isotérmico
natita [175]

Answer:

En un proceso isotérmico, es decir, la temperatura no cambia, el trabajo puede escribirse como:

W = n*R*T*Ln(P1/P2)

Donde P1 es la presión inicial y P2 la presión final.

Donde las cantidades:

n =  número de moles

R = constante de los gases ideales

T = temperatura no cambian.

Y sabemos que la ecuación de la energía interna es:

U = C*n*R*T

Donde C es otra constante que depende del gas.

De aca, podemos concluir que ninguna de estas variables cambia en nuestro proceso, por lo que la variación de la energía interna es cero.

U2 - U1 = 0

b) Para el calor cedido o absorbido, la formula básica es:

ΔQ = C*(T2 - T1)

Donde ΔQ es el calor absorbido o cedido por el gas, C es una constante que depende del gas, T2 es la temperatura final del gas y T1 es la temperatura inicial del gas.

Como la temperatura no cambia en el proceso, entonces:

T2 = T1

ΔQ = C*(T2 - T1) = C*0 = 0

No hay calor absorbido ni cedido.

c) Podemos concluir que en un proceso isotérmico la energía interna no cambia, y no hay un intercambio de calor.

8 0
3 years ago
Will Upvote!!!
katrin2010 [14]
The answer is A. Since the car is moving at a constant velocity, the car not accelerate no matter how far it travels.
5 0
3 years ago
What is the importance of iron to the health of human being
mel-nik [20]

Answer:

Iron is an essential element for production of blood cells in the body.

70% of iron in the body is composed in blood haemoglobin.

8 0
3 years ago
I NEED HELP PLEASE, THANKS! :)
Natali5045456 [20]

Answer:

i = -12.7 cm; h =  5.07 cm

Explanation:

1. Find the focal length

The focal length of a concave spherical mirror is half of its radius of curvature.

f = ½r = ½ × 34.0 cm = 17.0 cm

2. Find the image distance

A convex mirror produces a virtual image behind the mirror, so the image distance is negative.

\begin{array}{rcl}\dfrac{1}{o} + \dfrac{1 }{i} & = & \dfrac{1}{f}\\\\\dfrac{1}{50.0} + \dfrac{1 }{i} & = & \dfrac{1}{-17.0}\\\\\dfrac{1}{i}  & = & \dfrac{1}{-17.0} - \dfrac{1}{50.0}\\\\& = & \dfrac{50.0 - (-17.0)}{500\times(-17.0)}\\\\& = & \dfrac{67.0}{-850}\\\\i & = & \dfrac{-850}{67.0}\\\\& = & \textbf{-12.7 cm}\\\end{array}

3. Find the image size

\begin{array}{rcl}\\\\\dfrac{h_{\text{i}}}{ h_{\text{o}}} & = & -\dfrac{i}{o} \\\\\dfrac{h_{\text{i}}}{ 20.0} & = & -\dfrac{-12.7}{50.0} \\\\h_{\text{i}} & = & 20.0 \times  \dfrac{12.7}{50.0}\\\\& = & \textbf{5.07 cm}\\\end{array}

5 0
3 years ago
What energy transformation occurs during the combustion of coal in a power plant?
inn [45]
Hello there, the correct answer is:

B.
4 0
3 years ago
Read 2 more answers
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