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3 years ago

The increase in the greenhouse effect is caused primarily by the rise of _____ in the atmosphere.

Physics

2 answers:

Kruka [31]3 years ago

6 0

By the rise of Carbon dioxide

SIZIF [17.4K]3 years ago

5 0

The answer is carbon dioxide.

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How to find power of each resistor in a parallel circuit

lesya692 [45]

The power dissipated by each be found using any of the equation relating power currents voltage and resistance

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3 years ago

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The most basic difference between elliptical galaxies and spiral galaxies is that ________.

USPshnik [31]

Alliptical galaxies lack anything resembling the disk of a spiral galaxy.

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4 years ago

A skateboarder travels on a horizontal surface with an initial velocity of 4.0 m/s toward the south and a constant acceleration

Alenkinab [10]

Answer:

a) 0.32 m b) -2.4 m c) 1.08 m/s d) -4 m/s

Explanation:

As the x and y axes (as chosen) are perpendicular each other, the movements along these axes are independent each other.
This means that we can use the kinematic equations for displacements along both axes.
In the x direction, as the only initial velocity is in the south direction (-y axis), the skateboarder is at rest, so we can write:

$x =\frac{1}{2}*a*t^{2} (1)$

In the y-direction, as no acceleration is acting on the skateboarder, we can write the following displacement equation:

$y = v_{0y} * t (2)$

For t = 0.6s, replacing by the givens, we get the position (displacement from the origin) on the x-axis, as follows:

$x =\frac{1}{2}*a*t^{2} =\frac{1}{2} * 1.8 m/s2*(0.6s)^{2}\\ x = 0.32 m$

From (2) we can get the position on the y-axis (displacement from the origin) as follows:

$y = v_{0y} * t = -4 m/s * 0.6 s = -2.4 m$

In the x- direction, we can find the component of the velocity along this direction, as follows:

$v_{fx} = a*t$

Replacing by the values, we have:

$v_{fx} = a*t = 1.8 m/s2 * 0.6 s = 1.08 m/s$

As the skateboarder moves along the y-axis at a constant speed equal to her initial velocity, we have:

vfy = voy = -4 m/s

8 0

4 years ago

A capacitor with initial charge q0 is discharged through a resistor. a) In terms of the time constant τ, how long is required fo

-BARSIC- [3]

Answer:

It would take $\tau(\ln 9 - \ln 8)$ time for the capacitor to discharge from $q_0$ to $\displaystyle \frac{8}{9} \, q_0$ .

It would take $\tau(\ln 9 - \ln 7)$ time for the capacitor to discharge from $q_0$ to $\displaystyle \frac{7}{9}\, q_0$ .

Note that $\ln 9 = 2\,\ln 3$ , and that $\ln 8 = 3\, \ln 2$ .

Explanation:

In an RC circuit, a capacitor is connected directly to a resistor. Let the time constant of this circuit is $\tau$ , and the initial charge of the capacitor be $q_0$ . Then at time $t$ , the charge stored in the capacitor would be: