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3 years ago

What are the differences between convex lens and convex mirrors ?

Physics

1 answer:

MaRussiya [10]3 years ago

4 0

Answer:

The mirror is opaque while the lens is transparent

Explanation:

The lens is transparent throughout (lets light pass through), while the mirror reflects light. You are basically asking for the difference between a lens and a mirror

But how about the the behaviors of the convex mirror and convex lens? The convex lens will let light pass through and focus it on the other side of it. If you stand on one side of the lens, you can see what is on the other side of it. Think about a camera lens that's just curved!The convex mirror will reflect the light on the same side of it you'll basically will just see yourself but you'll look funny.

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If the releases 39.4 kj of energy, how many kilocalories does it release? (1 cal = 4.184 j) (round off answer to 2 decimal place

REY [17]

By using unit conversion, the energy released in kilocalories is 9.42 kcal.

We need to know about unit conversion to solve this problem. There are several energy units which able to explain how much the energy is such as calories and joule. The energy unit can be converted to another unit by unit conversion. The unit conversion of calorie to joule is

1 cal = 4.184 joule

From the question above, we know that

E = 39.4 kJ

By using the unit conversion, we can convert the energy into calorie

E = 39.4 kJ

E = 39.4 x 10³ J

E = 39.4 x 10³ / 4.184 cal

E = 9.42 x 10³ cal

E = 9.42 x 10³ /10³ kcal

E = 9.42 kcal

Hence, the energy released in kilocalories is 9.42 kcal.

Find more on unit conversion at: brainly.com/question/141163

#SPJ4

8 0

2 years ago

A 5.0 kg box is moving at 8.0 m/s on a level surface in the position. What force will bring the box to a rest in 10 meters

77julia77 [94]

Oh Okie is going to go to sleep lol is

7 0

3 years ago

What is needed for a complete circuit? a Charge flows along a complete conducting path b High Resistance c Wires connected to a

Ilia_Sergeevich [38]

Answer:

a Charge flows along a complete conducting path

Explanation:

6 0

3 years ago

where would a bowling ball and a napkin fall with the same acceleration. Check all that apply. A. Dropped off of the Leaning Tow

Kazeer [188]

Answer: here ya go

A Bowling ball and a napkin would fall with the same acceleration in space where there is vacuum. Basically where there is no drag force and the two objects are freely falling under gravity. The two objects would fall with same acceleration due to gravity.

Explanation:

7 0

3 years ago

The starter motor of a car engine draws a current of 140 A from the battery. The copper wire to the motor is 4.20 mm in diameter

GenaCL600 [577]

Answer:

(a)106.4C

b)0.5676mm

Explanation:

(a)To get the charge that have passed through the starter then The current will be multiplied by the duration

I= current

t= time taken

Q= required charge

Q= I*t = 140*0.760 = 106.C

(b) b. How far does an electron travel along the wire while the starter motor is on?(mm)

diameter of the conductor is 4.20 mm

But Radius= diameter/2= 4.20/2=

The radius of the conductor is 2.1mm, then if we convert to metre for consistency same then

radius of the conductor is 0.0021m.

We can now calculate the area of the conductor which is

A = π*r^2

= π*(0.0021)^2 = 13.85*10^-6 m^2

We can proceed to calculate the current density below

J = 140/13.85*10^-6 = 10108303A/m

According to the listed reference:

Where e= 1.6*10^-19

n= 8.46*10^28

Vd = J/(n*e) = 10108303/ ( 8.46*10^28 * 1.6*10^-19 ) =0.0007468m/s=0 .7468 mm/s

Therefore , the distance traveled is:

x = v*t = 0.7468 * 0.760 = 0.5676mm

7 0

3 years ago