Answer:
3a, 2b,4c,1d
Explanation:
what do I need to explain just something you know
PLEASE HELP ASAP THANKS!!!!
The diagram below shows a light ray striking a plane mirror surface at an angle of 40° to the normal. Which of the following diagrams shows the ray that is reflected from the plane mirror surface?
Answer:
3rd diagram
Explanation:
From the laws of reflection, we understood that the angle of incidence in equal to the angle of reflection.
For example, if a ray of light strikes a mirror at 60°, it reflected at the same angle (i.e 60°)
Considering the diagram given in the question above,
The ray of light strikes the mirror at 40°. Therefore, the light will be reflected with the same angle (i.e 40°)
Thus, the 3rd diagram gives the correct answer to the question.
An archer shoots an arrow 75 m distant target; the bull's-eye of the target is at the same height as the release height of the arrow. If d = 75 m and v = 37 m/s. At what angle must the arrow be released to hit the bull's-eye if its initial speed is 37 m/s?
Answer:
[tex]16.25^{\circ}[/tex]
Explanation:
R = Horizontal range of projectile = 75 m
v = Velocity of projectile = 37 m/s
g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]
Horizontal range is given by
[tex]R=\dfrac{v^2\sin2\theta}{g}\\\Rightarrow \theta=\dfrac{\sin^{-1}\dfrac{Rg}{v^2}}{2}\\\Rightarrow \theta=\dfrac{\sin^{-1}\dfrac{75\times 9.81}{37^2}}{2}\\\Rightarrow \theta=16.25^{\circ}[/tex]
The angle at which the arrow is to be released is [tex]16.25^{\circ}[/tex].
Which example best represents superposition? A. A layered cake B. A pile of toys C. Pens in a jar D. people standing in a group
Answer: I think layered cake.. if I’m wrong sorry
Explanation:
I guessed
More people die cach year in the U.S. as a result of
I would say the Common Cold because it's the main reason why kids and adults miss school or work.
I hope this helps <3 :)
(also please mark brainliest if you want to)
Answer:
For more than a decade, heart disease and cancer have claimed the first and second spots respectively as the leading causes of deaths in America. Together, the two causes are responsible for 46% of deaths in the United States. There is donation center's to help fight back against cancer and heart diseases, There are also of course places you can go to become a organ donner if there is no saving you from something... Hope this helps^_^
Explanation:
plz give brainliest and rating
) The unsaturated hydrocarbons whose structures contain a carbon -carbon triple
bond are called ……..
a) Alkenes b) Alkanes c) Alkynes d) Alcohol
Answer:
C. Alkynes
Explanation:
How would doubling the mass of Earth affect the gravity we experience?
19. Two waves traveling in opposite directions on a rope meet and undergo complete destructive interference.
Which of the following best
describes the waves a moment after the waves meet and coincide?
The waves no longer exist.
The waves continue unchanged.
The waves reflect and travel backward.
A single wave continues along the rope.
a.
b.
c.
d.
Answer:
B
Explanation:
5. What is the frequency of a sound wave when the speed of the sound is 340 m/s and has a wavelength of 1.21 m?
Explanation:
v = f × /\
340 = 1.21f
f = 280.99Hz
What would happen if we do not eat body building food?
Answer:
you would die and be dead.....
Explanation:
Answer:
You may suffer from muscle weakness.
If you want to build muscles, protein is the way to go.
Select all of the mixtures:
oxygen
gold
trail mix
soup
air
Answer:
trail mix, soup, and gold
hope this helps
have a good day :)
Explanation:
Answer:
1: gold 2: trail mix because its a combo of MnM's nuts rasins and whatever else might be in it lastly soup there can be anything in soup
Explanation:
may i be marked brainliest
Define the term ‘lower fixed point’.
Answer:
The lower fixed point, or ice point, is the temperature of pure melting ice at normal atmospheric pressure. Hopes this helps.
Explanation:
Two objects collide. One of the objects deforms upon collision. What type of collision is this?
Select one:
A: Elastic collision, because energy is used to defom the object.
B: Inelastic collision, because energy is conserved.
C: Inelastic collision, because kinetic energy was lost when the object was deformed.
D: Elastic collision, because momentum is conserved.
Answer:
D Elastic collision because momentum is conserved
Explanation:
this is the answer may i be marked brainliest?
Question 4 of 25
Which statement correctly compares nuclear fission with nuclear fusion?
A. Nuclear fission forms a larger nucleus, and nuclear fusion forms
smaller nuclei.
B. Nuclear fission uses a common isotope, and nuclear fusion uses a
rare isotope.
C. Nuclear fission reactions demonstrate the conservation of atomic
number, and nuclear fusion reactions do not.
D. Both nuclear fission and nuclear fusion produce energy from
matter
Help please
Answer:
Both nuclear fission and nuclear fusion produce energy from
matter
:D
Both nuclear fission and nuclear fusion produce energy from matter is the statement correctly comparing nuclear fission with nuclear fusion.
What is nuclear fusion?The process by which two or more tiny nuclei unite to generate a bigger nucleus is known as a nuclear fusion reaction.
The more energy it takes to liberate an electron from a smaller atom. This is referred to as binding energy.
As a result, when two little nuclei fuse together, there is more binding energy than when two big nuclei fuse together.
For example, the fusion of two hydrogen atoms produces more energy than the fusion of one helium atom, and surplus energy is expelled into space upon binding.
Both nuclear fission and nuclear fusion produce energy from matter is the statement correctly comparing nuclear fission with nuclear fusion.
Hence option D is correct.
To learn more about nuclear fusion refer to the link;
https://brainly.com/question/14019172
Of the following metals, which one is the BEST conductor of electricity?
Iron
Steel
Aluminum
Silver
Silver
Take a look at the chart attached for most conductive
Which shows transformation of energy in a working television?
A. mechanical energy to sound and light
B. electrical energy to light and sound
C. light to electrical energy to mechanical energy
D. electrical energy to light to sound to heat energy
Explanation:
the answer is b I think.......
a battery causes a current of 2.0 A to flow through a lamp. the power used by the lamp is 12 watts. what is the voltage (i asked this before and never got the answer, i need the answer soon)
Answer: 6V
Explanation:
Two cars of the same mass have different velocities. Which car has more momentum?
Answer:
The car with the higher velocity would have a more impactful momentum.A marathon runner runs a 200m sprint in 10 seconds. It is known that he started standing still. Then determine the acceleration achieved by him knowing that his final speed was 36 km / h.
Answer:
The acceleration of the runner is 0.25 m/s²
Explanation:
Given;
distance covered by the runner, d = 200 m
time of motion, t = 10 s
initial velocity of the runner, u = 0 (he started standing still)
final velocity of the runner, v = 36 km/h = 10 m/s
Therefore, to achieve the final speed of the runner, his acceleration is calculated as follows;
v² = u² + 2as
10² = 0 + (2 x 200)a
100 = 400a
a = 100/400
a = 0.25 m/s²
The acceleration of the runner is 0.25 m/s²
What are two ways you can increase power by climbing the stairs?
Answer:
Eat vegetables and make the stairs
Explanation:
because when the stairs are less deep you use less forced to go up them.
HELP PLEASE:How much work is done to increase the speed of a 2kg body from 36km / h to 72km / h?
Answer:
100 joules (J).
Explanation:
Converting Units - 36 km/h = 10 m/s
72 km/h = 20 m/s ( 1 km/h = 5/18 m/s)
Change in speed = 20 - 10 = 10 m/s
Applying the Work-Energy theorem,
[tex]Work done = \frac{1}{2} 2 (10)^2[/tex]
= 100 J.
A 1.50 kg cart moves in a circular path of 1.30 m radius at a constant speed of 2.00 m/s. (a) Calculate the magnitude of the centripetal acceleration of the cart.
(b) Calculate the magnitude of the centripetal force on the cart.
(c) Calculate the coefficient of friction between the tires and the ground
(d) Describe the direction of the centripetal force.
Answer:
the answer is 1500 because of the internet
the pair of elements with the most similar chemical properties are
a. Na and F
b. O and Kr
c. Ne and Ar
d. Mg and Cl
A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?
Answer:
50 W
Explanation:
Given :Force applied = 100 NDistance covered = 5 metresTime = 10 secondsTo find :
Power
Solution :For calculating power, we first need to know about the work done.
[tex] \bf \boxed{Work = Force \times displacement} [/tex]
Now, substituting values in the above formula;
Work = 100 × 5
= 500 Nm or 500 J
We know that,
[tex]\bf \boxed{Power=\dfrac{Work\:done}{Time\: taken}}[/tex]
Substituting values in above formula;
Power = 500/ 10
= 50 Nm/s or 50 W
Hence, power = 50 W .
What will be the mass of a body at the center of the earth as compared to other places on
the earth?
Answer:
The mass of the object does not change by moving it to another place. ... At the center of the earth the net gravitational force is zero, so the weight will be zero, but its masses will remain same. Hence the mass at the centre of earth will be equl to 50 kg.
Explanation:
It's because the mass of the object doesn't change by moving it to next place.
A 2.0 m wire segment carrying a current of 0.60 A oriented perpendicular to a uniform magnetic field of 0.50 T experiences a force of what magnitude?
a. 0.30 N
b. 0.60 N
c. 0.0 N
d. 0.15 N
IF YOU DONT KNOW THE ANSWER AND WANT TO GUESS, DON'T.
just go away :)
Answer:
The force experienced is 0.60 N (your answer is B.)
Given data:
length of wire L= 2 m
current in wire I= 0.6 A
magnetic field B= 0.5
The force experienced can be represented as 0.60n
brainliest please?
how did you do it i still can't figure it out
Answer:
can you ask clear questions I did not understand your question
formula for linear expansity
The diagram below shows a light ray striking a plane mirror surface at an angle of 40° to the normal.
Which of the following diagrams shows the ray that is reflected from the plane mirror surface?
Answer:
we need to see all of the options
Explanation:
do electronics harm our mental physical and social health
Answer:
(I will talk in my opinion only)
electronics do harm our mental health but they are also helpful ones like mobile both a boon and a curse
physical health is greatly affected and it's something no need to explain
social ( for me ) my only place to be social and talk people is brainly so for me mobile is very important
Answer:
Just a little bit. You should not be on electronics all the time. I know some people that are so addicted to there electronics that they won't even hang out with people. If you are at the point where you think about things other than school, friends, and family...you should think about getting off of your electronics and go play with a neighborhood friend outside, or have a sleepover! Your whole life should not count on your phone, iPad, or your laptop.
Explanation:
Hope this helps! No recorces included in this writing.
can someone help me???
Answer:
heliocentric is when the earth and the other planets revolves around the sun.
Explanation:
I'm not sure about which one but I do know what heliocentric is.