Answer:
True
Explanation:
A convex lens can produce a real image, but not a viral image
The word “radiation" has a negative meaning for many people. Devise an argument to illustrate the
positive aspects of radiation.
Answer: find the answer in the explanation
Explanation:
It is true that the word “radiation" has a negative meaning for many people. Nevertheless there are many uses and significant benefits of radiation to humans. Below are some of the advantages
1.) Its application is useful in Agricultural and scientific research
2.) It is used to induce mutations in plants and animals
3.) It is used in treatment of cancer
4.) It is used to sterilize equipment in hospital and also food.
5.) It is used to study defect in metals and welded joint and to check metal fatigue
6.) It is used to trace underground pipe leakages.
Two identical cows fell into a muddy hole. One fell on its side and the other on its feet.
Which one sunk furthest into the mud and explain your answer
Answer: The one that fell on its feet.
Explanation: The sinking of the two cows will depend on the pressure exert on the mud.
Pressure is the ratio of force to area.
The one which fell on its side would exert lower pressure because of its larger side of area. While the one that fell on its feet will exert greater pressure because of small area of its feet.
Therefore, the one that fell on its feet will sink furthest into the mud because of the ratio of the force to area of its feet ( pressure) is higher.
All lenses are objects that _____.
A. reflect light to create an image
B. refract light to create an image
C. reflect light to spread light rays apart
D. refract light to spread light rays apart
Answer:
B AND D ARE THE CORRECT OPTIONS
HOPE ITS HELPFUL.....
Answer:
B. refract light to create an image
Explanation:
How many kW*h (kilowatt hours) of electricity is consumed by a 500 w light bulb that burns
for seven hours?
Answer: 3.5 kWh
Explanation:
Given that the
Power P = 500 W
To convert watt to kilowatt, divide it by 1000
Power P = 500/1000 = 0.5 kw
Time t = 7 hours
Power is the rate at which work is done. That is,
P = WD/t
Cross multiply
WD = Pt
Where workdone WD is the energy E consumed in kWh .
Substitute P and t in the formula above.
E = 0.5 × 7
E = 3.5 kWh
Therefore, 3.5 kWh (kilowatt hours) of electricity is consumed by a 500 w light bulb that burns.
Water is a compound.
O A. True
B. False
A 60 kg man jumps down from a 0.8 m table. What is the speed when he
hits the ground? ( Take g= 10 m/s2)
Answer: Speed = 4 m/s
Explanation:
The parameters given are
Mass M = 60 kg
Height h = 0.8 m
Acceleration due to gravity g= 10 m/s2
Before the man jumps, he will be experiencing potential energy at the top of the table.
P.E = mgh
Substitute all the parameters into the formula
P.E = 60 × 9.8 × 0.8
P.E = 470.4 J
As he jumped from the table and hit the ground, the whole P.E will be converted to kinetic energy according to conservative of energy.
When hitting the ground,
K.E = P.E
Where K.E = 1/2mv^2
Substitute m and 470.4 into the formula
470.4 = 1/2 × 60 × V^2
V^2 = 470.4/30
V^2 = 15.68
V = square root (15.68)
V = 3.959 m/s
Therefore, the speed of the man when hitting the ground is approximately 4 m/s
How long will it take this wave to travel 3000 m in the x-direction?
Answer:
2.4
Explanation:
i got it right on edge
State the section of the graph (A, B, C, or D) where the car is moving the slowest.
Explain your answer.
b) Calculate the average speed of the car over the whole journey.
100 points and brainliest
Answer:
D 15m/s
Explanation:
1)you find the speed covered in all the points e.g on speed=distance covered
time taken
a)300m\15s=20m/s
b)rest no distance covered
c)(1000-300)=700m time=(60-35)=25. 700m/25s=28m/s
d)(1200-1000)=300m time=(80-60)=20s
200m/20s=10m/s
thus the lowest speed was 10m/s at D
Average speed=average distance
average time
=1200m/80s. =15m/s
Emotional management is to: prevent, control, redirect, and change.
A.
True
B.
False.
HELP MEH
Answer:
true
Explanation:
management -> to control
Answer:
true
Explanation:
I took the quiz
Was the object accelerating during the time interval labeled “B”?
A) Yes
B) No
There's not enough information in the graph to determine whether it was or it wasn't. It could have been, but we can't tell.
Before I explain this answer, it's VERY important to know exactly what "accelerating" means:
-- "Accelerating" does NOT always mean "speeding up".
-- "Accelerating" means ANY change in velocity.
-- That can be ==> speeding up, or ==> slowing down, or ==> turning.
This graph is labeled "Velocity vs Time", but it isn't really. "Velocity" means speed AND direction. The graph only shows us the object's speed, but nothing about its direction.
During time-interval-B, the speed isn't changing, but the object could still be changing direction, like turning a corner, or on a curved path. We don't know. The graph doesn't show us that information.
The object could be accelerating during time-interval-B. It's true that the speed wasn't changing. But maybe the direction was. If the direction was changing, then we have to say the object was 'accelerating' during the interval labeled B .
Neutralization _____.
A.) forms an acid and a base
B.) occurs when an acid is dissolved in water
C.) occurs when a base is dissolved in water
d.) is a reaction between an acid and a base
The diagram shows the scales used for recording
temperatures. The labels for the scales are missing.
W
х
Y
Water
boils
212
100
373
-
Which labels complete the diagram?
W: Fahrenheit
X: Celsius
Y: Kelvin
OW: Kelvin
X: Celsius
Y: Fahrenheit
W: Celsius
X:Fahrenheit
Y: Kelvin
W:Celsius
X. Kelvin
Y. Fahrenheit
Water
freezes
_32
02
273
-273
Absolute 460
zero
Answer:
A.
W: Fahrenheit
X: Celsius
Y: Kelvin
Explanation:
this is correct, I took the test on edge.
The scales W X Y in that order are; Fahrenheit, Celsius and Kelvin.
What is a temperature scale?The temperature scales essentially provide a basis for the measurement of temperature. The three main temperature scales are; Fahrenheit, Celsius and Kelvin. The Kelvin is called the absolute scale.
Given the values of the boling points of water, the scales W X Y in that order are; Fahrenheit, Celsius and Kelvin.
Learn more aout temperature sclaes: https://brainly.com/question/10095561
What do a mirror and a magnifying glass have in common? What makes them different?
ˆˆI mean this in terms of a physics point of view, like the angles, etc.
Answer:
They both have a reflection, but a mirror just reflects anything in front of it, while a magnifying glass helps you see closer through the reflection of something.
Explanation:
A dog walks along The ground. If the dog applies an action force on the ground, what is the reaction force?
Please HELP
Explanation:
Action and reaction are two forces that are equal in magnitude but the direction is opposite.
When a dog walks along the ground, the action force is the force that dog applies on the ground. On the other hand, the reaction force is the force that the ground applies on the dog. It is based on Newton's third law of motion.
When leaving a fish tank, a ray moving at 31.0 deg in glass (n = 1.50) exits into the air. At what angle does it enter the air?
Answer:
50.5
Explanation:
Using Snell's Law, you can rearrange the equation to solve for the 2nd angle. The most important part of this question is remembering to use the 1.50 n in the numerator and 1.00n in the denominator. The reason for this is because 1.50's degree is already found: 31.0. You're looking for the degree where the ray hits air, which would be the 1.00 n. So, the equation looks like this: Sin^-1 (1.50sin(31)/ 1.00). After solving the equation, you get 50.5 or 50.6 if you round up. I hope this was helpful! :)
Answer:
50.5
Explanation:
right on acellus
The distance between two crests of a transverse wave is referred to as the Question 1 options: medium. amplitude. wavelength. phase.
Answer:
Wavelength
Explanation:
Wavelength
Answer:
Wavelength
Explanation:
Pls can someone help
Answer:
ITS THE LAST ONE(4TH), I THINK
Explanation:
Answer:
The answer is Diagram 2(top right) and Diagram 4(bottom right)
Explanation:
In a magnet, the magnetic field will always move from North to South.
North will give out magnetic field and South will receive it.
hi:) I don’t understand why acceleration of free fall is equal to gravitational field strength. anyone able to help? Thank you :)))!
Explanation:
It was learned that a free-falling object is an object that is falling under the sole influence of gravity. A free-falling object has an acceleration of 9.8 m/s/s, downward (on Earth). ... The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
Hope this helps..
Explanation:
It was learned that a free-falling object is an object that is falling under the sole influence of gravity. A free-falling object has an acceleration of 9.8 m/s/s, downward (on Earth). ... The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
Hope this helps..
Light of wavelength 525 nm passes through a double slit, and makes its second maximum (m = 2) at an angle of 0.482 deg. What is the separation of the slits , d, IN MILLIMETERS ?
Answer:
d = 0.124 mm
Explanation:
It is given that,
Wavelength of light is 525 nm
It makes second maximum at an angle of 0.482 degrees
We need to find the separation of the slits.
For 2nd maximum, the equation for double slip experiment is given by :
[tex]d\sin\theta=n\lambda[/tex]
d = separation of the slits
[tex]d=\dfrac{n\lambda}{\sin\theta}\\\\d=\dfrac{2\times 525\times 10^{-9}}{\sin(0.482)}\\\\d=0.124\ mm[/tex]
So, the separation of the slits is 0.124 mm.
Answer: 0.124
Explanation: TRUST ME BROOO
Convert 55 inches to centimeters.
I need this quick pls
The right answer is 139.7 centimetres
1 inches=2.54 centimetres
Please see the attached picture for full solution
Hope it helps
Good luck on your assignment
Answer:
139.7 cm
Explanation:
WILL GIVE BRAINIEST TO CORRECT ANSWER
Define loudness and intensity of sound. How are the two concepts related?
Answer:
Hey mate, here's ur answer
-------------------------------------------------------------
Loudness refers to how a sound seems to a listener, whether it's loud or soft.
___________________________
Intensity is the sound power per unit area. It is independent of the sensitivity of the human ears.
___________________________
The loudness of a sound relates the intensity of any given sound to the intensity at the threshold of hearing. It is measured in decibels (dB).
___________________________
Hope this helps
#stayhomestaysafemate
:D
PLEASE HELP <3
what is the mass of mr. thomson’s prius if his kinetic energy is 641300 J when he is driving at a velocity of 22 meters per second on the highway? please show work
Answer:
The mass of Mr. Thomson’s prius is 2650 kg.
Explanation:
We are given with, the kinetic energy of Mr. Thomson’s prius is 641300 J
He is moving with a velocity of 22 m/s
It is required to find the mass of Mr. Thomson’s prius.
Due to his motion, a kinetic energy will possess by him. The mathematical form of kinetic energy is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
Solving for m
[tex]m=\dfrac{2K}{v^2}[/tex]
Plugging all the values, we get :
[tex]m=\dfrac{2K}{v^2}\\\\m=\dfrac{2\times 641300}{(22)^2}\\\\m=2650\ kg[/tex]
So, the mass of Mr. Thomson’s prius is 2650 kg.
2. Elizabeth drove 30 miles to the south, then drove 50 miles to the east. Draw a
vector diagram that shows her resultant displacement. Be sure to label all vectors.
Answer: R = 58.3 miles
Explanation:
Displacement is a vector quantity. That is, it has both magnitude and direction.
As Elizabeth drove 30 miles to the south, then drove 50 miles to the east. The resultant displacement can be achieved by using pythagorean theorem
R^2 = 30^2 + 50^2
R^2 = 900 + 2500
R^2 = 3400
R = sqrt(3400)
R = 58.3 miles
The vector diagram that shows her resultant displacement is attached as a file.
What are two interchangeable terms with radiation?
Answer:
volume and dynamics
Explanation:
A horse runs around a circular track that is 350.0 m long. He runs clockwise from
the start line back to the start line, then turns back and goes counterclockwise back
to the start line again. What is the horses displacement?
A. 0 m
B. 300.0 m counterclockwise
C. 300.0 m counterclockwise
D. 600.0 m
Answer:
A 0m
Explanation:
The horse runs clockwise round the strack, then goes back to the start line ending up back at the same place when it started.
Is the Phosphorus element a metal?
Answer:
No phosphorus is not a metal.
Explanation:
Which of the following statements is true about voltage in a series circuit?
a) The voltage across each branch is the same as the total voltage.
b) The sum of the voltages across each branch is equal to the total voltage.
Oc) There is no voltage in a series circuit.
d) The voltage is the same across each branch in the circuit.
The sum of the voltages across each branch is equal to the total voltage is
true about voltage in a series circuit.
What is a Series circuit?This is the type of circuit in which the whole current flows through each
component and is not divided.
In a series circuit, the total voltage equals the sum of the voltages across
each branch where individual components are present.
Read more about Series circuit here https://brainly.com/question/19865219
hi:)anyone able to help with (2) & explain too? Thank you :)!
Answer:
i think hit the ceiling of the aeroplane
Explanation:
hope it helps u stay safe
The reflection of a 10.0 cm object appears to be 18 cm tall and 9 cm behind the mirror.
What distance is the object from the mirror?
cm
Answer: 5cm
Explanation:
Given the following :
Image height = 18cm
Object height = 10cm
u = object distance
v = image distance = 9 cm
Using the relation:
image height/object height= v/u
18/10 = 9/u
Cross multiply
18 × u = 10 × 9
18u = 90
u = 90/18
u = 5cm
Therefore,
Object distance from mirror = 5cm
Answer:
5 cm
Explanation:
correct on edge 2020/2021
What is the basic premise of the universal gravitational law? Question 7 options: Each object in the universe that has mass attracts every other object that has mass. The motion of an object in a circular path is kept along that path due to gravitational force. The force of an object is equal to the mass of the object multiplied by its acceleration. The acceleration of an object in freefall will always be 9.8 meters per second squared, due to gravitational pull.
The correct answer is A. Each object in the universe that has mass attracts every other object that has mass.
Explanation:
The gravitational law proposed by Newton explains how the gravitational force works. The basic idea or premise in this law is that the gravitational law exists in all the universe, and occurs with all objects that have a mass. This includes the fact all objects or particles that have a mass attract all other objects with mass but this is also influenced by the distance between the objects, and the masses of each object. In this way, the gravitational force is equal to the gravitational constant multiplied by the mass of the two objects and divided by the distance between the objects.
Answer:
A. Each object in the universe that has mass attracts every other object that has mass.
Explanation:
The universal law of gravitation states that every object in the universe that has mass attracts every other object in the universe that has mass. The force increases as the mass of the objects increases, and decreases as the objects become further and further apart.