A 2-inch, f/4 reflector has a focal length of:

6 inches
8 inches
4 inches
2 inches

A 2-inch, F/4 Reflector Has A Focal Length Of:6 Inches8 Inches4 Inches2 Inches

Answers

Answer 1
I’m pretty sure it’s 8 sorry if I’m wrong

Related Questions

What is the most accurate way to check your heart rate (bpm)? Help me?

Answers

The neck or wrist ps side of the neck

Answer:

Count your pulse for 60 seconds.  

Explanation:

This isn't physics, this quesiton should be marked in health.

hehe i hate being a single girl....what physical properties dose europium have

Answers

Answer:

Europium has a bright shiny surface. it's steel grey and has a melting point of 826 degree Celsius and a boiling point of about 1,489 degree Celsius.

Explanation:

the density is 5.24 grams per cubic centimeter.

Use the scenario below for questions 4-7.
A rocket launched at a 60-degree angle has a launch velocity of
31.00 m/s.
4. What is the magnitude of the rocket's initial vertical velocity?
a. 10 m/s
b. 15.5 m/s
c. 26.85 m/s
d. 31 m/s

Answers

C is correct answer

I’m a god, a planet, and I measure heat. What am I?

Answers

mercury??????? my only guess

Mercury is that it?                        

If anyone can answer any of these questions it would be so amazing. My teacher for physical science didn't do a good job explaining it and I don't have enough time to teach it to myself.

Answers

Answer:

H,ONCIC1N,ONHCOQ,OH2HOO2CO2NH2N2,OC,O2NO2 N,O

A rubber rod with a negative 4.0 C (-4.0 x 10-6 C) charge is 10 cm east of a pith ball with a positive charge of 5.0 C. A plastic rod with a positive 2.0 C charge is 5.0 cm north of the pith ball.

Answers

552. cm eastthat's the answer

what is reflection of light ? Which type of surface is required for a regular reflection​

Answers

Answer:

MIRROR

Explanation:

Answer:

reflection of light is the bouncing back of light rats when it falls on a smooth surface or polish surface.

15. How mh energy does a 850W microwave transfer reheating a meal for 30s?

Answers

Answer- is 10000000000

Answer: 25500 joules

Explanation: E = P x t

What happens as a bungee jumper gets closer to Earth's surface?
A. Gravity decreases
B. His mass increases
C. Air resistance decreases
D. His velocity increases

Answers

Answer:

Velocity increases

Explanation:

Gravity is constant, except when discussing "apparent weight"

Mass is constant here

Air resistance would actually increase

Velocity DOES increase, because Earth is pulling the jumper downwards with an unbalanced force. The unbalanced force creates acceleration (-9.81 m/s^2), which means his velocity is increasing constantly.

Which of the following shows constant velocity?

Answers

Answer:cool

Explanation:

cool cool cool cool

What is the momentum of a 750 kg car traveling at a velocity of 25 m/s north?

Answers

Answer:

18750 kg-m/s

Explanation:

Momentum = mass x velocity 

Answer:

18750 kg-m/s

Explanation: Momentum = mass x velocity 750x25 = 18750 kg-m/s

Can you brainlist

What must be your average speed in order to travel 350 km in 5.15 h? *
66.0 km/h
67.0 km/h
68.0 km/h
69.0 km/h

Answers

v= s/t

=
5.15/ 350

=68.0 km/h

The temperature of one substance is 90 degrees F and another
substance is 50 degrees F. If they are placed close together, what will
happen

Answers

Answer:

Substance that is 90 degrees will lose energy and the substance that is 50 degrees will gain energy

Explanation:

because that is how energy work duhhhhh

Solve for the gravitational potential energy at point B.

Use the steps below to show all your work for full points

Acceleration due to gravity =9.8 m/s/s

GPE = m*g*h​

Answers

Answer:

GPEb=67.86% of initial GPE at point a

Explanation:

It depends on how massive the ball is, but I can still give an answer comparing original GPE at point A to new GPE at B

GPEa=m*9.8*140

GPEa=1372(m)

GPEb=m*9.8*95

GPEb=931(m)

GPEb=0.6786*GPEa

What will happen when a charged object touches a neutral object?

Answers

if a charged object touches a neutral object it will be a short circuit.

Answer:

will force atom(electrons) within the escort (conductor) to go (move).

Explanation:

All matter is made up of very small particles called. ?

Answers

Answer:

All matter is made up of very small particles called atoms.

A larger car takes more force to move._
O Newton's 1st law
O Newton's 2nd law
O newton's 3rd law
O newton's 4th law

Answers

newton’s 2nd law
———

Newton's second law states that the acceleration of an object is directly related to the force on it, and inversely related to the mass of the object. You need more force to move or stop an object with a lot of mass (or inertia) than you need for an object with less mass. .

what determines the color of light?

1. wavelength
2. wave height
3. wave speed
4. wave amplitude

Answers

answer: wave length
(Please Mark brainly or like I’m trying to get points lol!)

Answer:

wave length

Explanation:

Why is ultraviolet radiation considered more dangerous to humans than infrared radiation?
ANSWER:Ultraviolet radiation has a shorter wavelength than infrared radiation, and thus, the waves have higher energy. This allows them to penetrate the first layers of skin on humans and can mutate the DNA in the cells of the skin. This can result in cancer because of the mutations caused by the ultraviolet radiation.

Answers

answer is in the question :)

Pls help it’s dues today


Sam studied kinetic and potential energy by observing apples on a tree during a field investigation. Explain what type of energy these apples have.

Answers

Answer: Gravitational Potential Energy

Explanation:

The box in the right diagram takes 1.1 sec to strike the floor after being released from rest. Find the landing speed of the 0.3-kg box, the tension of the rope, and moment of inertia of the pulley.

Answers

Answer:

dhrh4b

Explanation:

hours rbergrehebbeb3j3

nsiz. hs aj. he zj xuw x

HELPPPPPPP MEEEEEEE ASAP PLZZZZZZZZZ

Answers

the answer is 24 atoms.

Hey guys I really need help can you please come and help me on struggling please help I choose one but that could be wrong

Answers

Answer:

It's solar because if you leave a tv on for longer it gets hot and obviously it produces light and sound so, by subject of elimination, it's solar.

Explanation:

Answer:

I think solar because the thermal and sound and light are like a part of the tv (sorry for my English)

A 780 kg vehicle accelerates at 4 m/s2. How much force is the car generating?

Answers

Explanation:

Given

mass (m) = 780 kg

acceleration (a) = 4 m/s²

Force (F) = ?

We know

F = m * a

= 780 * 4

= 3120 Newton

The car is generating 3120 Newton force.

Hope it helps :)

Calculating net force

Answers

Answer:

0N.

Explanation:

Net force is the sum total of forces acting on an object.

The Fn which is the net force is

450+ (-250) + (-600)+ 600+ 0 + 250 + (-450)

= 450-250+(-600)+ 600+0+250-450

= 0N

The net force is 0

briefly explain transport of oxygen by blood ​

Answers

Answer:

Once oxygen has entered the blood from the lungs, it is taken up by haemoglobin (Hb) in the red blood cells. ... Each molecule of haemoglobin can hold four oxygen molecules. It is haemoglobin that carries the oxygen as it is transported around the body in the blood.

Explanation:

a force of 25N acts on an object. The work done by the force is 400J. How far dose the object move in the direction of the force?

A. 6.3cm
B. 16cm
C. 16m
D. 10km​

Answers

Answer:
C
Explanation:
d=w/f
d=400/25
d= 16

The distance moved by the object in the direction of the force is equal to 16 m. Therefore, option (B) is correct.

What is the work?

Work can be demonstrated as the energy employed when a force is exerted to move an object through a specific distance. The work done depends upon both the exerted force on the object and the displacement.

The action of the force when the object is moving in a straight line in the direction of the exerted force over a distance 'd'.

W= F ×d

Where 'd' is the displacement, 'F' is the applied force and W is the work done.

Given, the work done by the applied force, W = 400 J

The force applied on the object, F = 25 N

The distance moved by the object, d = W/F

d = 400/25

d = 16 m

Therefore, the object moves a distance of 16 m in the direction of the force.

Learn more about work, here:

brainly.com/question/13662169

#SPJ2

Your personal hygiene is more important to avoid you becoming ill, more so than spreading germs.
True
False

Answers

I think it’s False, because spreading germs can impact and spread way easier than having a good hygiene ( but still wash your hand!)

What is the velocity of a 24 kg object with 108 kg m/s of momentum?

A) 3 m/s
B) 4.5 m/s
C) 6 m/s
D) 84 m/s

Answers

Answer:

The velocity of the object is 4.5 m/s

Explanation:

Momentum is equal to mass times velocity.  We can rearrange that relationship to say that velocity is equal to momentum divided by mass.  With that we can say:

v = 108 kg m/s / 24kg

v = (108 / 24) m/s

v = 4.5 m/s

Write S if the given quantity is scalar and V if the quantity is a vector

_100° Celsius
_50 m/s²
_300 s
_250 m/s, northwest
_1m, to the right
_10 cm,upwards
_525 600 mins.
_90 km/h,east
_5 000 kg
_1.5 L

Answers

Answer:

1. Scalar_100° Celsius

2. Vector_50 m/s²

3. Scalar_300 s

4. Vector_250 m/s, northwest

5. Vector_1m, to the right

6. Vector_10 cm, upwards

7. Scalar_525 600 mins.

8. Vector_90 km/h,east

8. Scalar_5 000 kg

10. Scalar_1.5 L

Explanation:

A scalar quantity can be defined as a quantity that has magnitude but no direction. Some examples of scalar quantities are speed, mass, temperature, volume, length, etc.

On the other hand, a vector quantity has both magnitude and direction. Some examples of vector quantities are acceleration, velocity, displacement, etc.

1. Scalar_100° Celsius (Temperature).

2. Vector_50 m/s² (Acceleration).

3. Scalar_300 s (Time).

4. Vector_250 m/s, northwest (Velocity).

5. Vector_1m, to the right (Displacement).

6. Vector_10 cm, upwards (Displacement).

7. Scalar_525 600 mins. (Time).

8. Vector_90 km/h,east (Velocity).

8. Scalar_5 000 kg (Mass).

10. Scalar_1.5 L (Volume).

Other Questions
Freedom PopFreedom PopFreedomFreedom Pop Pop they right? what do you do when you get a 25 on a 20 question test Should possession be a crime? Help please-6 + 2/5c = 24 What is the molar mass of PbSO4? help me with this too please (80 points)RequirementsYou must include each of the following in your diagram, story/explanation:1. precipitation2. runoff3. evaporation4. condensation5. transpiration6. infiltration7. groundwater 8. clouds9. collection areas (example: ocean or lake)Instructions1. Complete either the diagram or written explanation 10 points Diagram you will draw the water cycle process. You must include each of the required items and label each. You are not required to color it, but it is encouraged to help differentiate between the processes. Written Explanation for either of these options you need to include each of the processes. It may be beneficial to explain them in the order in which they occur but is not necessary. 2. Answer the questions Questions1. What process drives evaporation and transpiration? Explain how this process operates in the water cycle? (2 Points) 2. What role does gravity play in the water cycle? Hint: it is in more than 1 process (2 Points)3. What states of matter will your find water in going through the water cycle? (1 Point) My assignment for photography is below...Create a presentation of two photographs on one of your interests.In the first photograph, show how copyright laws and good etiquette are not followed.In the second photograph, show how copyright laws and good etiquette are followed.WHAT IN THE WORLD DO I PHOTOGRAPH??? The eiffel tower stands 1,986 ft tall. the chrysler building in New your city is 319 meters. Which is taller? Solve by using dimensional analysis define private equity funds economics. Which is NOT an example of a fossl fuelO CoalO OllO WaterO Natural gasPlease help ASAP Find the unit rate.Round to the nearest hundredth,if necessary. 2.99 for 16 lb I REALLY NEED HELP !!! newtons = mass x _______a) capacitanceb) inductancec) gravitational field strength I rlly need help with these two questions so I would rlly appreciate it if someone helped me out loll I will mark you as brainliest if you answer this correctly pls and ty Resolver las siguientes operaciones de sumas con monomios: almenos una gracias 7 xy +2yx + 4xy +5 =5x^2 y+3xy^2+x^2 y I need help now assssssap How is your mental health?? How did the rona change your life By how much is -23 less than 23? helllllllllllllllppppppppppppp WILL MARKBRIANLIST A child standing on a river bank ten feet above the river throws a toward the river at a speed of 12 feet per second . How long does it take before the rock splashes into the river ? Use the equation h=-16t^ 2 +vt+sPLEASESE HELP