By which method does heat travel from the sun to Earth? A. Conduction B. Convection C. Evaporation D. Radiation

What is the formula for potassium iodide

musickatia [10]

Potassium iodide

Molar mass: 166.0028 g/mol

Formula: KI

3 0

4 years ago

The displacement (in meters) of a particle moving in a straight line is given by the equation of motion s = 6/t2, where t is mea

ycow [4]

Answer:

Velocity of the particle at time t = a

$v(a)=-\frac{12}{a^3}$

Velocity of the particle at time t = 1

$v(1)=-12m/s$

Velocity of the particle at time t = 2

$v(2)=-1.5m/s$

Velocity of the particle at time t = 3

$v(3)=-0.44m/s$

Explanation:

Displacement,

$s(t)=\frac{6}{t^2}$

Velocity is given by

$v(t)=\frac{ds}{dt}=\frac{d}{dt}\left ( \frac{6}{t^2}\right )=-\frac{12}{t^3}$

Velocity of the particle at time t = a

$v(a)=-\frac{12}{a^3}$

Velocity of the particle at time t = 1

$v(1)=-\frac{12}{1^3}=-12m/s$

Velocity of the particle at time t = 2

$v(2)=-\frac{12}{2^3}=-1.5m/s$

Velocity of the particle at time t = 3

$v(3)=-\frac{12}{3^3}=-0.44m/s$

8 0

3 years ago

A uniform continuous line charge with net positive charge Q and length L lies on the x-axis from −L2 to +L2. This problem asks a

irakobra [83]

Answer:

(C) zero (there is no net horizontal component of the E-field)

Explanation:

If we subdivide the bar into small pieces, each piece (dx) contains a charge (dq), the electric field of each piece is equivalent to the field of a punctual electric charge, and has a direction as shown in the attached figure. For each piece (dx) in the negative axis there is another symmetric piece (dx) in the positive axis, and as we see in the figure for symmetry the sum of their electric fields gives a resultant in the Y axis (because its components in X are cancelled by symmetry).

Then the resultant of the electric field will be only in Y.

(C) zero (there is no net horizontal component of the E-field)

5 0

4 years ago

Why is the power of concave lense negative

Travka [436]

Answer:

because the focal length is negative.

Explanation:

Power of a lens (P) is the reciprocal of its focal length (f).

4 0

3 years ago

A volcano erupts, and a chunk of hot magma is launched horizontally with a speed of 205 m/s from a height of 550 m. We can ignor

Over [174]

Answer:

2170

Explanation:

the calcuations add up to it

7 0

3 years ago

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