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Temka [501]
3 years ago
12

Which of the following is a scientific law?

Physics
2 answers:
Varvara68 [4.7K]3 years ago
7 0

Answer:

B. For a gas in a closed container at a constant temperature, the product of the pressure and the volume remains constant.

Explanation:

The rest are societal laws, as they are telling you something you should avoid or follow.

Hope this helps :)

Gelneren [198K]3 years ago
5 0
B: For a gas in a closed container at a constant temperature, the product of the pressure and the volume remains constant.
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Q:1 write down the differences between mass and weight ?​
Evgesh-ka [11]

Answer:

mass is the amount of "matter" in an object. weight is the force exerted on an object by gravity

Explanation:

7 0
3 years ago
A continuous length of wire is made into 10 coaxial loops, located in the plane of this page. Each loop has a cross sectional ar
AleksandrR [38]

Answer:

e = 10 V

Explanation:

given,

number of the coaxial loops = 10

Cross sectional area =  0.5 m²

magnitude of magnetic field =

B = 3 T + (2 T/s)*t.

B = ( 3+ 2 t ) T

induced potential difference = ?

At time = 2 s

we know,

induced emf

e = - N\dfrac{d\phi}{dt}

∅ = B . A

e = - N\dfrac{d(BA)}{dt}

e = - NA\dfrac{dB}{dt}

e = - 10 \times 0.5 \times \dfrac{d}{dt}(3 + 2 t)

e = - 10 \times 0.5 \times 2

e = -10 V

magnitude of induced emf

|e| = |-10 V|

e = 10 V

the induced potential difference in the loop = e = 10 V

7 0
3 years ago
A busy waitress slides a plate of apple pie along a counter to a hungry customer sitting near the
Ostrovityanka [42]

Answer:

a. 0.5307 sec

b. 0.4458 m

c. =v_x=0.84\ m/s\ ,\ v_y=5.2\ m/s

Explanation:

Horizontal Motion

It describes the dynamics of an object thrown horizontally in free air. The initial horizontal velocity is maintained all the time since no horizontal forces are acting. The initial vertical velocity is zero at launch time, but it grows downwards powered by the acceleration of gravity.  

The object hits the ground at a distance x from the point of launching, after having traveled a vertical distance y_o, taking a time t to complete the travel. The formulas who relate the different magnitudes are

v_x=v_o

The horizontal velocity v_x is the same regardless of the elapsed  time

v_y=gt

x=v_ot

\displaystyle y=y_o-\frac{gt^2}{2}

The plate of apple pie left the counter at a speed  

v_o=0.84\ m/s

The counter is y_o=1.38\ m high.

a.

Knowing that

y_o=1.38\ m

We use this formula to compute t

\displaystyle y=y_o-\frac{gt^2}{2}

At the moment when the plate hits the floor y=0

\displaystyle 0=y_o-\frac{gt^2}{2}

\displaystyle y_o=\frac{gt^2}{2}

Solving for t

\displaystyle t=\sqrt{\frac{2y_o}{g}}

\displaystyle t=\sqrt{\frac{2(1.38)}{9.8}}

t=0.5307\ sec

b.

x=(0.84)(0.5307)

x=0.4458\ m

c.

v_x=0.84\ m/s

v_y=(9.8)(0.5307)

v_y=5.2\ m/s

3 0
4 years ago
A pilot heads her jet due east. The jet has a speed of 425 mi/h relative to the air (in other words, if the air were still, the
Elza [17]

Answer:

The resultant velocity of the jet as a vector in component form 426.87 mi/hr 5.36 degrees North.

Explanation:

Vectors are quantities that have their magnitude and direction .

Sketching out the problem given, by using straight lines to represent each of the vectors, we will have a right angled triangle as shown below.

The solution can be obtained by applying Pythagoras theorem to

resolve the vectors.

Velocity of jet plane = 425 mi/hr

velocity of air = 40 mi/hr

Resultant of the vectors =\sqrt[]{425^{2}+40^{2}}=426.87 mi/hr

Vector direction =tan^{-1}(\frac{40}{425})= 5.36 degrees

hence the velocity is 426.87 mi/hr in a direction 5.36 degrees inclined Northward

5 0
3 years ago
Physical Science, please explain your answer!
Svetach [21]

Answer:

The answer to your question is: 5 N to the west  or to the left

Explanation:

Both forces go to the left, so the net force will be the sum of them.

         Net force = 3 N + 2 N

         Net force = 5 N

         to the left, because the arrows signal to that direction

4 0
3 years ago
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