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gayaneshka [121]
3 years ago
15

Distinguishing Types of Mirrors Light is coming from the left; which is a concave mirror?

Physics
1 answer:
Snezhnost [94]3 years ago
7 0

A concave mirror is a converging mirror while a convex mirror is a diverging mirror.

<h3>Curved mirrors</h3>

Curved mirrors are different from plane mirrors because they have a center of curvature. The image formed by each type of mirror depends on the position of the object.

There are two types of curved mirrors;

  • Converging mirror
  • Diverging mirror

A concave mirror is a converging mirror while a convex mirror is a diverging mirror. The images are not provided here so we can not really say which is which.

Learn more about curved mirrors: brainly.com/question/8512677

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several months after a forest is cut down, a nearby river becomes much muddier than ever before. Infer how the river changed
ryzh [129]
Well this is just my opinion but I think because all the plants were gone they cant stop mud from rolling into it. Also when it rains the trees wont suck up the water, that will make it over flow and release into the land or dirt on the outsides of it. Mixing those two gives mud and it can potentially flow back in the river in largeish masses causing the river to mix with the mud makinging it more muddy. Hope this helps :D
4 0
4 years ago
What is the peak emf generated (in V) by rotating a 1000 turn, 42.0 cm diameter coil in the Earth's 5.00 ✕ 10−5 T magnetic field
ELEN [110]

Answer:

5.77 Volt

Explanation:

N = 1000, Diameter = 42 cm = 0.42 m,  t = 12 ms = 12 x 10^-3 s

Change in magnetic field, B = 5 x 10^-5 T

The peak value of emf is given by

e = N x dФ / dt

e = N x A x dB/dt

e = (1000 x 3.14 x 0.21 x 0.21 x 5 x 10^-5) / (1.2 x 10^-3)

e = 5.77 Volt

3 0
3 years ago
A radio tower emits energy in the form of waves. These waves travel great distances. Some of them even leave Earth and travel
Elena-2011 [213]
Light because it is an electromagnetic wave and they can travel through the vacuum in outer space.
3 0
3 years ago
Read 2 more answers
Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.05 km long. The density of gold
arsen [322]

Answer:

Resistance of gold wire, R=1977 \times 10^3 ohm

Explanation:

In this question we have given

Density of gold, d=19.3\times 10^3 \frac{kg}{m^3}

resistivity of gold, r=2.44\times 10^{-8} ohm.m

Length of wire, L= 2.05 km

Temperature, T= 20^oC

We know that relation between volume and density is given as

Density= \frac{mass}{Volume}

Therefore, volume occupied by one gram gold is given as,

V=\frac{.001 kg}{19.3\times 10^3 Kg m^{-3}} = 5.181\times 10^{-8} m^3.........(1)

We Know that Volume of gold wire which is cylindrical in shape is given by following formula

V=\pi \times r^2 \times L......(2)

Here,

A= \pi \times r^2...........(3)

here A is the cross sectional area of cylendrical gold wire  

From equation 2 and 3

we got

V=A \times L...............(4)

on comparing equation 1 and equation 4, we got,

A \times L=5.181\times 10^{-8} m^3

A=\frac{5.181\times 10^{-8} m^3}{2050 m}

A=2.53\times 10^{-11}m^2

we know that resistance and resistivity are related by following formula,

Resistance = resistivity\times \frac{L}{A}................(5)

Put values of resistivity, A and L in equation 5, we got

R = \frac{2.44 \times 10^{-8} ohm.m \times 2050 m}{2.53\times 10^{-11} m^2}

R=1977 \times 10^3 ohm

Therefore resistance of gold wire, R=1977 \times 10^3 ohm

7 0
3 years ago
If for 1.00 inch there are 2.54 cm, then how many centimeters are in 4.00 ft
ra1l [238]
121.92 is the answer I believe
7 0
3 years ago
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