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Shtirlitz [24]
3 years ago
12

How can the rate of a reaction be increased?

Physics
2 answers:
VladimirAG [237]3 years ago
7 0

Answer:

<u>A - Increasing the temperature.</u>

<u></u>

Explanation:

<em>Raising the reaction temperature by 10 °C can double or triple the reaction rate. This is due to an increase in the number of particles that have the minimum energy required. The reaction rate decreases with a decrease in temperature.</em>

artcher [175]3 years ago
3 0
I think the answer is A- increasing the temperature.
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The circuit shown in the figure (Figure 1) uses a neon-filled tube. This neon lamp has a threshold voltage V0 for conduction, be
Svetllana [295]

Part 1)

Answer:

Explanation:

As we know by equation of charging of the capacitor we will have

V = E(1 - e^{-t/RC})

so we will have

87 = 105(1 - e^{-t/RC})

here we know that

R = 3.00 \times 10^6 ohm

C = 0.250 \mu F

so we have

t = 1.32 s

Part b)

Answer:

The time will increase.

Explanation:

As we know that on increasing the value of the resistance the the product of the resistance and capacitance will increase so the time will increase to get the above voltage.

Part c)

Answer:

The capacitor discharges through a very low resistance (the lamp filled with ionized gas), and so the discharge time constant is very short. Thus the flash is very brief.

Explanation:

Since the lamp resistance is very small so the energy across the lamp will totally lost in very short interval of time

Part d)

Answer:

Once the lamp has flashed, the stored energy in the capacitor is gone, and there is no source of charge to maintain the lamp current. The lamp "goes out", the lamp resistance increases, and the capacitor starts to recharge. It charges again and the process will repeat.

Explanation:

Since we know that the battery is connected to the given system so after whole energy of capacitor is flashed out it is again charged by the battery and the process will continue

3 0
3 years ago
An astronaut is out in space with an extremely precise timing device measuring the speed of various fast‑moving objects. A laser
Leviafan [203]

Answer and Explanation:

with reference to Einstein's theory of special relativity, the speed of an electromagnetic radiation, here, laser will not change in any inertial frame or remains same irrespective of any change in inertial frame.

Therefore, the speed of light measured in both the cases, i.e., in astronaut's reference frame and spaceship's reference frame will be equal to the speed of light in vacuum, i.e., 3\times 10^{8} m/s.

The laser gun's speed in astronaut's reference frame is the same as the speed of the spaceship as it mounted on it, i.e., the speed of the laser gun is 200 million m/s.

The laser gun's speed measured in spaceship's reference frame will be zero, as it is mounted on the spaceship and is stationary in the spaceship's reference frame.

5 0
3 years ago
How strong is the electric field between the plates of a 0.86 µf air-gap capacitor if they are 2.0 mm apart and each has a char
Gala2k [10]
The electric field between the plates is equal to the potential difference across the plates divided by the separation of the plates.
The potential difference across the plates is equal to the charge stored divided by the capacitance.
7 0
3 years ago
Four point charges each having charge Q are located at the corners of a square having sides of length a.
Murljashka [212]

Answer:

Explanation:

Given

Four Point charges are Placed at the corner of a square with side length a

Length of diagonal a\sqrt{2}

Distance of charge from center \frac{a\sqrt{2}}{2}=\frac{a}{\sqrt{2}}

Potential at the center due to four charges is given by

V=\frac{4\cdot k\cdot Q}{\frac{a}{\sqrt{2}}}

as all the four charges are equal and placed symmetrical about center

Work done required to bring a fifth charge q from infinity to the center of the square

W=qV

W=\frac{4\sqrt{2}kQq}{a}    

7 0
3 years ago
Why only magnetic substances are used to make a magnet?​
Elina [12.6K]

Answer:

In substances such as iron, cobalt, and nickel, most of the electrons spin in the same direction. This makes the atoms in these substances strongly magnetic—but they are not yet magnets. To become magnetized, another strongly magnetic substance must enter the magnetic field of an existing magnet.

7 0
2 years ago
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