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tatuchka [14]
4 years ago
12

Which of the following statements about electric field lines associated with electric charges is false? Electric field lines can

be either straight or curved. Electric field lines can form closed loops. Electric field lines begin on positive chares and end on negative charges. Electric field lines can never intersect with one another.
Physics
1 answer:
Tcecarenko [31]4 years ago
8 0

Answer:

The false statement is 'Electric field lines form closed loops'.

Explanation:

  • Electric field lines originate from positive end and terminates at negative end,i.e., field lines are inward in direction to the negative charges and outward from the positive charges.
  • These lines when close together represents high intensity and when far apart shows low intensity of the field.
  • These lines do not intersect, as the tangent drawn on these lines provides us with the field direction and intersection of these lines means two field directions which is not possible.
  • These lines unlike magnetic field lines do not form closed loops as they do not turn around but originate at positive end and terminates at negative end which ensures no loop formation.
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La aceleración de un proyectil que describe una trayectoria parabólica cerca de la superficie terrestre es constante o variable
Ann [662]

Answer:

Es una constante porque sigue funcionando y debido a la gravedad, tú tendrías que ser tú quien la detenga si está bajando en lugar de hacia arriba.

Explanation:

5 0
3 years ago
A porsche 911 can go from 0 to 60 mph in 3.4 seconds whats ur acceleration?
viva [34]
60mph= 26.8224 m/s
accelerationn= final velocity-initial velocity/time
3 0
3 years ago
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Oxygen at 50 lbf/in.2, 200 F is in a piston/cylinder arrangement with a volume of 4 ft3. It is now compressed in a polytropic pr
Ksju [112]

Answer:

The value of heat transfer during the process Q = - 29.49 KJ

Explanation:

Given data

P_{1} = 50 \frac{lbf}{in^{2} } = 344.7 k pa

V_{1} = 4 ft^{3} = 0.113 m^{3}

T_{1} = 200 F = 366.4 K

T_{2} = 400 F = 477.6 K

Poly tropic index n = 1.2

gas constant for oxygen = 0.26 \frac{KJ}{kg K}

From ideal gas equation

P_{1} V_{1} = m R T_{1}

Put all the values in above equation we get

⇒ 344.7 × 0.113 = m × 0.26 × 366.4

⇒ m = 0.408 kg

Heat transfer in poly tropic process is given by

Q = \frac{\gamma - n}{( \gamma - 1)( n - 1)} [ {m R (T_{1} - T_{2}  ) ]

Put all the values in above formula we get

⇒ Q = \frac{1.4 - 1.2}{( 1.4 - 1)( 1.2 - 1)} [ {m R (T_{1} - T_{2}  ) ]

⇒ Q = 2.5 × 0.408 × 0.26 × ( 366.4 - 477.6 )

⇒ Q = - 29.49 KJ

This is the value of heat transfer during the process & negative sign shows that  heat is lost during the process.

3 0
4 years ago
A sinusoidal wave of wavelength 2.00m and amplitude 0.100 m travels on a string with a speed of 1.00 m/s to the right. At t = 0
Elanso [62]

The left end of the string is given as y = - 0.100 sin (3.14t )

<h3>How to find the sinusoidal wave</h3>

We would have to create an equation of this form

The wave function equation

y = A sin ( π*x - ω* t )

When we put in the values that we have in the equation

y = 0.100 sin ( 3.14 x - 3.14 t )

Due to the fact that it is the left end of the string, the value that we would have for x is going to be 0, hence we would have

y = 0.100 sin (3.14 * (0) - 3.14t )

Then y would be 0.100 sin (- 3.14t )

This would give us the final equation

y = - 0.100 sin (3.14t )

Hence we would have the left end of the string as y = - 0.100 sin (3.14t )

Read more on sinusoidal wave here:

brainly.com/question/20912200

#SPJ4

5 0
2 years ago
O
lbvjy [14]

Hi there!

1.

The period of a pendulum can be calculated using the following equation:
\large\boxed{T = 2\pi \sqrt{\frac{L}{g}}}

T = period (s)

L = length of string (m)
g = acceleration due to gravity (m/s²)

Plug in the values:

T = 2\pi \sqrt{\frac{4}{9.8}} = \boxed{4.014 s}

2.

Calculate the period:


T = \frac{\text{Time}}{\# of oscillations} = \frac{5}{20} = \boxed{0.4 s }

Frequency is the reciprocal of the period, so:


f = \frac{1}{T} = \frac{1}{0.4} = \boxed{2.5 Hz}

6 0
3 years ago
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