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3 years ago

Unlike images produced by a convex spherical mirror, images produced by concave spherical mirrors

Physics

2 answers:

daser333 [38]3 years ago

7 0

I think it's B, I know it's not C

Olenka [21]3 years ago

6 0

<h3>Answer;</h3>

B. can be real or virtual depending on the object's placement.

<h3>Explanation;</h3>

Unlike images produced by a convex spherical mirror, images produced by concave spherical mirrors can be real or virtual depending on the object's placement.
Concave mirror and convex mirror are two types of spherical mirrors, where a convex mirror has a reflecting surface that bulges outside while a concave mirror has a reflecting surface that bulges inwards.
Convex mirror forms images that are virtual and diminished, while a concave mirror forms an image that may either be real or virtual, diminished or enlarged depending on the position of the object from the mirror.

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A car travels for 5.5 h at an average speed of 75 km/h. How far did it travel? T TE

ANEK [815]

Answer:

$\boxed {\boxed {\sf 412.5 \ kilometers }}$

Explanation:

Distance is the product of speed and time.

$d=s*t$

The speed of the car is 75 kilometers per hour. It traveled for 5.5 hours.

$s= 75 \ km/hr \\t= 5.5 \ hr$

Substitute the values into the formula.

$d= 75 \ km/hr * 5.5 \ hr$

Multiply. Note that the hours will cancel each other out.

$d= 75 km * 5.5 \\d= 412.5 \ km$

The car travelled 412.5 kilometers.

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2 years ago

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials’ boat pulls

babunello [35]

Answer:

They are 7.4m apart.

Explanation:

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$Y=Yo+Vo*t+\frac{1}{2}*a*t^2$

considerating only the movement on Y axis:

$0=4.6-(9.81)*t^2\\t=0.68s$

Because we have a contant velocity motion on X axis:

$xs=vs*t\\xs=17m/s*(0.68s)\\xs=11.6m$

and

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the distance between them is given by:

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2 years ago

A type of Lead (Pb) ion has a + 4 oxidation number. Sulfur (S) has a — 2 oxidation number. What would be the chemical formula fo

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Answer: The chemical formula for the compound of these two elements is $PbS_2$

Explanation:

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Here metal lead is having an oxidation state of +4 called as $Pb^{4+}$ cation and sulphur non metal has oxidation state of -2 called as $S^{2-}$ . Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $PbS_2$

The chemical formula for the compound of these two elements is $PbS_2$

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3 years ago

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Rufina [12.5K]

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