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].
The Cockroach is an amazing bug that can compass itself into half of its normal height.
A. True
B. False
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.
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
What is the speed of a wave in (m/s) with a 5 meter wavelength and a period of 20 seconds?
Answer: 0.25 m/s
Explanation: Speed = wavelengt · frequency
v = λf and frequency is 1/period f = 1/T
Then v = λ/T = 5 m / 20 s = 0.25 m/s
Help please:Calculate the mechanical energy of a bird flying at a speed of 10 m / s at an altitude of 15 m. If its mass is 150 g and the influence of gravitational force is 9.81 m / s²?
Mass of the bird(m) = 150 g = 0.15 kg
Speed (v) = 10 m/s
Kinetic Energy = [tex]\frac{1}{2}m v^{2} = \frac{1}{2} 0.15 (10)^{2}[/tex] = 7.5 J
Altitude (h) = 15 m
Gravitational Potential Energy = (0.15)(9.81)(15) = 22.0725 J
Mechanical Energy = Kinetic Energy + Potential Energy = 7.5 + 22.0725
= 29.5725 J
Name a track field event. Describe the event. Is it running. jumping. or throwing even?(there wasn’t an option for gym but here)
Answer:
Javelin Throw (My favorite event)
Explanation:
Javelin Throw is a spear about 8 feet long and is used to throw for maximum distance.The participant runs first within a predetermined area and then throws the javelin.
If you have any questions revolving around this this topic,feel free to ask me and I will be happy to help,Good luck! :)
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 .
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 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:
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.
Which planet has the most important role in changing the direction of a comet's path?
A.
Earth because of its atmosphere of nitrogen and carbon dioxide
B.
Mars because of its position near the asteroid belt
C.
Jupiter because of its strong gravitational force
D.
Saturn because of its large ring system
Answer:
C.
Jupiter because of its strong gravitational force
Explanation:
Jupiter planet has the most important role in changing the direction of a comet's path. The correct option is C.
What are gravity and gravitational force?Gravity is a fundamental force in the universe that causes objects with mass or energy to attract one another. It is a force of attraction between any two objects in the universe that have mass. The force of gravity is directly proportional to the masses of the objects and inversely proportional to the distance between them.
Mathematically,
F=G×m1×m2/r²
The gravitational force is the force of attraction between two objects due to their masses. It is the force that causes objects to be drawn toward one another.
The strength of the gravitational force between two objects is determined by the mass of each object and the distance between them. The larger the mass of an object, the greater its gravitational force, and the closer two objects are, the greater their gravitational force.
Gravitational force is responsible for keeping the planets in orbit around the sun, for the tides on Earth, and for many other natural phenomena. The gravitational force is one of the four fundamental forces of nature, along with the strong nuclear force, the weak nuclear force, and the electromagnetic force.
Here in the question
Jupiter's strong gravitational force can significantly influence the trajectory of a comet, causing it to change direction or even collide with the planet. This is due to Jupiter's massive size, which creates a powerful gravitational pull that can affect objects within its vicinity. In fact, Jupiter is often referred to as the "vacuum cleaner of the solar system" because it has such a strong gravitational pull that it can attract and capture comets and asteroids.
Hence C. Jupiter because of its strong gravitational force, plays a most important role in changing the direction of a comet's path.
To learn more about gravitational force click:
https://brainly.com/question/12528243
#SPJ2
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?
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 is potential energy?
Answer:
energy that is stagnant and cannot be changed
Answer:
Potential energy is a form of mechanical energy in which an object is at rest or it's not moving
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.
4. Anaerobic exercise helps type 2 diabetes.
a. True
b. False
Answer:
true
Explanation:
b/c anaerobic exercis helps type 2 diabetes
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
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.
) 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 did you do it i still can't figure it out
Answer:
can you ask clear questions I did not understand your question
how do u cure a headache without any pills no bots or I will report u?
Answer:
Try a Cold Pack. Use a Heating Pad or Hot Compress. Ease Pressure on Your Scalp or Head. Dim the Lights. Try Not to Chew. Hydrate. Get Some Caffeine. Practice Relaxation.
Answer:
Listen to calming music
Explanation:
Thats what I do. You could also sleep ;)
HELP ME PLEASEEEEEEEEEEEEEEE
Use the kinetic energy equation to explain why speed has a greater impact on kinetic energy than mass.
Answer:
KE = 1/2 M V^2 Equation to express kinetic energy
Since the result depends linearly on M and to the second power on V,
V has greater effect on the result.
What is Carnot engine ?
A Carnot heat engine is a theoretical engine that operates on the Carnot cycle. The basic model for this engine was developed by Nicolas Léonard Sadi Carnot in 1824. ... In the process of going through this cycle, the system may perform work on its surroundings, thereby acting as a heat engine.
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
A car tire rotates with an average angular speed of 29 rad/s. In what time interval will the tire rotate 3.5 times?
Answer:
"0.758315 sec" is the appropriate choice.
Explanation:
The given values are:
Angular speed,
= 29 rad/s
or,
= [tex]\frac{29}{2 \pi} \ rps[/tex]
Tire rotates,
= 3.5 times
Now,
The time interval will be:
⇒ [tex]\Delta t=\frac{3.5}{\frac{29}{2 \pi} }[/tex]
⇒ [tex]=\frac{2 \pi\times 3.5}{29}[/tex]
⇒ [tex]=\frac{21.99}{29}[/tex]
⇒ [tex]=0.758315 \ sec[/tex]
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 reason Senators are in office for 6 years is...
No links pls or I’m reporting you :)
1) To separate Senators from the whims of the
general public.
2) to save money in elections
3) Because Senators are required to be older
than representatives
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.