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4 years ago

13

If the energy from the light is captured and stored by the surface without being reflected or transmitted, then it has been ____

___. A. absorbed B. bent C. scattered D. refracted

2 answers:

vekshin14 years ago

6 0

A. ABSORBEDDDDDDDDDDDDDDDDDD

a_sh-v [17]4 years ago

6 0

The answer is A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.

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Consider a step-down transformer with 15 turns in the primary and 6 turns in the secondary windings. Calculate the input impedan

AURORKA [14]

Answer:

Input impedance of this transformer is 50 ohms.

Explanation:

Given that,

Number of turns in the primary coil, $N_p=15$

Number of turns in the secondary coil, $N_s=6$

Output impedance of the transformer, $V_o=8\ \Omega$

The number of turns and the impedance ratio in the step down transformer is given by :

$\dfrac{15}{6}=\sqrt{\dfrac{Z_p}{Z_s}}\\\\\dfrac{15}{6}=\sqrt{\dfrac{Z_p}{8}}\\\\Z_p=50\ \Omega$

So, the input impedance of this transformer is 50 ohms. Hence, this is the required solution.

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3 years ago

The unit of energy is a derived unit why

olga2289 [7]

Answer:

The unit of energy is joule which depends upon the fundamental unit kg, m and sec. So, the unit of energy is a derived unit.

Explanation:

7 0

3 years ago

Read 2 more answers

1.) What things signal the coming of spring?

olasank [31]

Answer:

In Explanation

Explanation:

The signs of the coming of spring include firstly the sight of Robins. It is believed that the sight and singing of the Robins is considered arrival of spring by many in the US. Secondly, the winter is not yet over but the blooming of Daffodils first of all flowers is indication of the spring. As the air gets warmer the flowers bud and new leaves start growing on trees since the days also begin to get longer providing much warmth which also an indicator of the spring.
Without the axial tilt of our Earth, firstly, the Sun would have remained above the equator (Equinox) forever but fortunately due to the tilt we get equinoxes twice a year and not forever. Moreover, the temperature and precipitation levels would not vary much and the equator would remain always warm and the poles always cold. Secondly, due to the tilt as the Earth orbits around the Sun and with changes in solstices we get variety of the seasons which would have been impossible otherwise.

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3 years ago

If forces acting on an object are unbalanced, which factor may result from an unbalanced force? A.The net force is negative. B.T

bezimeni [28]

Answer:

<h2>A. The net force is negative.</h2>

Explanation:

just took the test :)

4 0

3 years ago

Read 2 more answers

A world-class sprinter can reach a top speed (of about 11.8 m/s ) in the first 19.0 m of a race. what is the average acceleratio

Whitepunk [10]

We use the kinematic equation of motion, to calculate the average acceleration

$v^{2} =u^{2} +2a (h-h_{0} )$

or $a=\frac{v^{2} -v_{0}^2}{2(h-h_{0}) }$

Here, $v_{0}$ is initial speed , v is final speed h is covered distance $h_{0}$ is initial position.

Given $v= 11.8 m/s$ , $v_{0} =0$ , $h = 19.0 m$ and $h_{0} =0$ .

Substituting these values in above equation we get,

$a=\frac{(11.8)^2-0}{2(19.0-0)} \\\\\ a =3.66 m/s^2$

Thus, the average acceleration of the sprinter is $3.66 m/s^2$ .

6 0

3 years ago