प्राण

A seismic wave is energy released as the result of rock movement along a fault.<br> T/F

Vladimir [108]

Answer:

TRUE

Explanation:

7 0

3 years ago

Xenon hexafluoride was one of the first noble gas compounds synthesized. The solid reacts rapidly with the silicon dioxide in gl

Oxana [17]

Answer:

0,93 atm

Explanation:

For this we will use PV = nRT

P is what we want to find

V = 1 L

n = $\frac{8.53}{223.23}$ = 0,038 moles

R = 0,082 $\frac{L atm}{K mole}$

T = 25°C = 298,15 K

P * 1 = 0,038 *0,082 * 298,15

P = 0,93 atm

5 0

3 years ago

You wish to place a spacecraft in a circular orbit around the earth so that its orbital speed will be 4.00×103m/s. What is this

Levart [38]

Answer:

The radius of orbit= $2.49\times 10^7 m$

Explanation:

We are given that

Orbital speed= $4.00\times 10^3$ m/s

We have to find the radius of orbit of spacecraft.

We know that

Gravitational constant= $6.67\times 10^{-11}m^3/kgs^2$

Mass of earth= $5.972\times 10^{24} kg$

Orbital speed= $\sqrt{\frac{GM}{r}}$

Where G= Gravitational constant

M=Mass of earth

r=Radius of orbit

Substitute the values in the formula

$4\times 10^3=\sqrt{\frac{6.67\times 10^{-11}\times 5.972\times 10^{24}}{r}$

Squaring on both sides

$16\times 10^6=\frac{6.67\times 10^{-11}\times 5.972\times 10^{24}}{r}$

$r=\frac{6.67\times 10^{-11}\times 5.972\times 10^{24}}{16\times 10^6}$

$r=2.49\times 10^7 m$

Hence, the radius of orbit= $2.49\times 10^7 m$

7 0

4 years ago

Set up a parallel circuit with three resistors. Set up the battery to be 9 V, one resistor at 10 Ohms, the other at 21 Ohms, and

valina [46]

In a parallel circuit, the equivalent resistance is the reciprocal of (the sum of the individual reciprocals).

1/R = 1/10 + 1/21 + 1/13

1/R = 0.225 mhos

R = 4.45 ohms

I = V / R

The total current out of the battery is

I = (9v)/(4.45ohms)

I = 2.02 Amperes

As the total current leaves the battery, it splits into 3 paths, and each resistor gets part of it. The 10ohm resistor gets the most current; the 21ohm resistor gets the least current. After flowing through the resistors, the 3 currents join and add up to 2.02 Amperes again, and the same current returns to the battery.

Each resistor has the same 9v of EMF across it.

4 0

3 years ago

A light bulb emitting 1750 Im of luminous flux shines on a book that is 3.0

denis-greek [22]

The illumination of the book is found to be approximately equal to 15 lx.

Option 1.

Explanation:

Luminous flux is the measure of power of the light emitted from a source and illumination is the property of the light to illuminate a given surface when it falls on the surface. So the measure of the region the light flux illuminates the surface is termed as illumination.

As here the luminous flux is given as 1759 lm and the distance of the object which has to be illuminated is placed 3 m away from the source ,the illumination is found to be directly proportional to the luminous flux and inversely proportional to the square of the distance between them

$illumination = \frac{Luminous flux}{4\pi d^{2} } \\\\illumination = \frac{1750}{4*3.14*3*3} = 15.48 lx = 15 lx$

So, the illumination of the book is found to be approximately equal to 15 lx.

5 0

3 years ago