Answer:
1. conduction
2. convection
3. radiation
4. conduction
5. convection
6. radiation
7. conduction
8. conduction
9. radiation
10. convection
11. radiation
12. conduction
13. convection
The height of a helicopter above the ground is given by h = 3.0 t^2, where h is in meters and t is in seconds. After 5.0 s, the helicopter releases a small mailbag. How long after its release does the mailbag Preach the ground
Answer:
3.91 s
Explanation:
From the question,
The height of the helicopter is given as
h = 3t²......................... Equation 1
After 5 seconds, The height of the helicopter is given as
h = 3(5²)
h = 3×25
h = 75 m.
Note: The small mailbag falls under gravity.
Hence,
h = ut + 1/2(gt²)....................... Equation 2
Where u = initial velocity of the mailbag, t = time, h = height, g = acceleration due to gravity of the mail bag.
Given: h = 75 m, u = 0 m/s ( at the maximum height).
Constant: g = 9.8 m/s²
Substitute these values into equation 2
75 = 0(t) +1/2(9.8t²)
solve for t
1/2(9.8t²) = 75
4.9t² = 75
t² = 75/4.9
t² = 15.31
t = [tex]\sqrt{15.31}[/tex]
t = 3.91 s
Explain how energy is produced in the Sun
Answer:
The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. ... The sun provides more energy in an hour than the United States can use in a year!
Explanation:
Answer:
Explanation:
Like most stars, the sun is made up mostly of hydrogen and helium atoms in a plasma state. The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. ... Yet this amount of energy is enormous.
.) Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity.
a.) Vector, scalar, scalar
b.) Vector, scalar, vector
c.) Scalar, scalar, vector
d.) Scalar, vector, vector
Answer:
C
Explanation:
mass is a scalar quantity, number of anything is also a scalar quantity, since it lacks direction, and wind velocity is a vector quantity
The given quantities are classified as vector and scalar quantities;
mass of an object (scalar)the number of leaves (scalar)wind velocity (vector)Vector quantities are those quantities that have both magnitude and direction. Examples include the following;
velocity (m/s)acceleration (m/s²)force (N)weight (N)Scalar quantities are those quantities that have only magnitude but no direction. Examples include the following;
speeddistancemasswork, etcThus, from the explanation above, we can classify the given quantities as follows;
mass of an object (scalar)the number of leaves (scalar)wind velocity (vector)Learn more here: https://brainly.com/question/24700357
When a light ray is reflected from a surface, the ratio of the angle of incidence to the angle of reflection is
Answer:
equal to 1
Explanation:
When any ray of light falls or strikes on a surface, the ray is reflected back and the angle of reflection is equal to angle of the incidence, where both the angles are always measured from the path of light that is normal to surface of the point at which the ray of light strikes the surface. This is called as the laws of reflection of light.
And therefore, the ratio of the angle of incidence to the angle of reflection is always equal to 1.
Describe two possibilities of what will happen to the universe in the future.
The Universe in the future have two possibilities:
The Universe will come to an end in the opposite of a Big Bang called The Big Crunch. The other possibility is that we live in an Eternal Universe that will never come to end.What is universe?Universe is the whole cosmic system of matter and energy. The Earth, the Sun, the Moon, the planets, the stars along with the dust , gases, rocks forms the universe.
The big bang is the theory which explains that how the universe began. It says that the universe began with just a single point. It went on expanding and stretched to grow as large as possible. It is still now expanding.
The universe consist of fully dark matter, interstellar gases or dust. The big bang is increasing just because in universe there is abundant of hydrogen and helium. The two possibilities:
The Universe will come to an end in the opposite of a Big Bang.The other possibility is that we live in an Eternal Universe that will never come to end.This universe is still on it way of expanding more.
Thus, the future possibilities of universe are explained.
Learn more about universe.
https://brainly.com/question/9724831
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Which group number below represents the Oxygen Group?
1 point
18
Periodic Table of the Elements
14
15
2
18
16
Oxygen has an atomic number 8, because it has 8 protons and 8 electrons.
The first shell of an atom can hold up to 2 electrons but oxygen has 8 electrons, in that eight electrons 2 are in the first shell, so it has 6 more electrons left. The second shell can hold up to 8 electrons, oxygen has only 6 more electrons after the first shell is full, so it will have 6 electrons in the second shell
From this we know that oxygen has 2 shells so it is in period 2, and by counting from left to right, the sixth box in period 2 lies on group 16
Therefore Oxygen lies on group 16 and period 2
Happy to help :)
If you need my help for any other question, feel free to ask
1.A motorcycle’s velocity at the top of the hill is 11.0 m/s. 4.0 seconds later it reaches the bottom of the hill with a velocity of 20.0 m/s. What is the acceleration of the motorcycle?
2.A motorcycle’s velocity at the top of the hill is 11.0 m/s. 4.0 seconds later it reaches the bottom of the hill with a velocity of 20.0 m/s. What is the acceleration of the motorcycle?
Answer:
1) as far as I remember
Let's take 20 as vf (final velocity) and 11 as (initial velocity) and 4 as time
So we would use this formula a=vf-vi/t
So 20-11/4
Asnwer 2.25
part of the plant that isresponsible for the transport of water from the roots to the leaves
Answer:
if you mean *responsible* for the transport of water from the roots to leaves is Xylem
PLEASE HELP ME THIS IS VERY IMPORTANT!!!!!!!!!!!!! 20 points and I will give brainlyest
The diagram below shows a portion of the rock cycle.
Diagram of the rock cycle including 4 boxes labeled A, B, C, and D. There is an arrow labeled burial cementation extending from underwater sediment to box A. There is an arrow labeled deep burial, heating and pressure extending from underwater sediment to box B. There is an arrow labeled melting connecting box B to box D. There is an arrow labeled slow crystallization connecting box D to box C.
At what location in the diagram is granite most likely formed? (4 points)
Group of answer choices
Location A
Location B
Location C
Location D
Answer: I believe it’s location D. Or whichever is the location of slow crystallization.
Explanation: Slow crystallization of magma forms granite. Hope this helps. :)
Answer:
D
Explanation:
JeLysa Hanson, a 41-year-old female, presents to the ED complaining of shortness of breath and tightness in her ches
examination, she is discharged with a diagnosis of musculoskeletal pain due to overexertion while practicing her new
her backyard
Be sure to list the codes, one code per box, in the correct order, from top to bottom. Capitalization, punctuation, and sp
impact whether or not your answer is correct. Follow coding best practices.
What is/are the correct diagnosis code(s)?
Solution :
It is given that JeLysa Hanson went for a medical examination complaining shortness of breath and tightness in her chest. After the medical examination, she was diagnosed of a musculoskeletal pain that was due to the overexertion while practicing her new hobby of boxing.
Therefore the codes of her examinations are :
ICD Code :
[tex]$R06.02$[/tex] = shortness of breath
[tex]$R07.89$[/tex] = chest pain or chest tightness
[tex]$M79.1$[/tex] = musculoskeletal pain
[tex]$X50.3XXS$[/tex] = overexertion due to the repetitive body movement
A student drops a feather and rock at the same time from Mrs. Taylor's
window. If air resistance wasn't a factor, what should she observe? *
Answer:the rock is heaver and gravity pulls it down while the feather floats for a while and then reaches the ground
Explanation:i dont know if this is the right answer or not
In which of the following is a skater NOT accelerating?
A-going straight while speeding up
B-going straight at constant speed
C-making circles at constant speed
D-going straight while slowing down
An object falls from a height of 12m. The object's potential energy at the top is 50J. Where is the potential energy of the object
25J
Answer:
the height of the is 6 m.
Explanation:
Given;
potential energy of the object, P.E = 50 J
Height of fall of the object, H = 12 m
Determine the mass of the object, m
P.E = mgh
m = (P.E) / (gh)
m = (50) / (9.8 x 12)
m = 0.425 kg
Let the height of the object at 25 J = h₂
mgh₂ = 25
h₂ = (25) / (mg)
h₂ = (25) / (0.425 x 9.8)
h₂ = 6 m
Therefore, the height of the object at 25 J is 6 m.
An object that looks white when exposed to sunlight reflects all colors of light. What
does a white object look like when it is exposed to blue light?
heathers uncle has HIV/Aids .after visiting ,heathers uncle kisses her good bye on the cheek. Should heather and her uncle be concerned about HIV transmission ?
Answer:
no
Explanation:
HIV transmits only during fluid interaction, only if she Heather had an cut exposing the inner skin then HIV can be transmitted
Help please hurry! ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️
Helppppp!!!!!!!!!!!!!! It's due Today!!!!!!!!!!!! NO LINK PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
It means that if force is constant, as mass is increased, acceleration decreases. resistance to changes in motion (also known as INERTIA.) ... If the net force on an object is doubled, its acceleration will double If the mass of an object is doubled, the acceleration will be halved
Explanation:
When an object is moving to the left and slowing down, what direction is the acceleration?
Answer:
According to our principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object has a negative acceleration. In Example D, the object is moving in the negative direction (i.e., has a negative velocity) and is speeding up.
Explanation:
Is a plant a vertebrate or invertebrate
Answer:
Veterbrate
Explanation:
how do i find the weight of the suitcase
pls help asap
2. A 4.0 kg magnetic toy car traveling at 3.0 m/s east collides and sticks to a 5.0 kg toy magnetic car also traveling at 2.0 m/s east. Calculate the final speed and direction of the magnetic car (coupled) system?
Answer:
2.44 m/s due East
Explanation:
From the question given above, the following data were obtained:
Mass of 1st car (m₁) = 4 Kg
Velocity of 1st car (u₁) = 3 m/s
Mass of 2nd car (m₂) = 5 Kg
Velocity of 2nd car (u₂) = 2 m/s
Final velocity (v) =?
The final velocity can be obtained as follow:
v(m₁ + m₂) = m₁u₁ + m₂u₂
v(4 + 5) = (4×3) + (5×2)
9v = 12 + 10
9v = 22
Divide both side by 9
v = 22/9
v = 2.44 m/s
Thus, the final velocity is 2.44 m/s.
Since both cars was moving due East before collision, and after collision, they stick together, then their direction will be due East.
How many protons does Silicone have
A.2
B.14
C.28
D.28.08
Answer:
14
Explanation:
the left top is protons
hope this helps :)
You are on a road trip. You drive 80
miles in 1.5 hours. Then you take a
lunch break for 30 minutes. You then
continue 140 miles for 2 hours. What is
your average speed for the trip?
Answer:
Jsdiwkwdmxxj we
Explanation:
hcndjnjwidjxnwnjwi
Select all the correct answers.
According to Newton's law of universal gravitation, which statements are true?
As we move to higher altitudes, the force of gravity on us decreases.
D As we move to higher altltudes, the force of gravity on us Increases.
0 As we gain mass, the force of gravity on us decreases.
As we galn mass, the force of gravity on us increases.
. As we move faster, the force of gravity on us increases.
Answer:As we galn mass, the force of gravity on us increases.
Explanation:
can a body have zero velocity and finite acceleration?Explain
Answer:
Kinda? Depends what the question is fully asking
Explanation:
Acceleration is a change in velocity. So I guess if the velocity of something is -2 m/s and its positively accelerating at a value of +1 m/s, then that means every second its velocity changes by +1m/s.
So that -2 m/s thing after one second will be going -1 m/s.
After another second it'll be going 0 m/s.
After another itll be going +1 m/s and so on.
So at one point for a brief moment, it can have an acceleration but be at 0 m/s velocity.
When potential energy decreases, kinetic energy
Answer:
Kinetic energy increase
Answer:
increases
Explanation:
Matt has a portable basketball goal in his driveway. He has the basket set 8 ft (2.4 m) high so he can practice dunking the ball. He slams the ball through the hoop and then hangs onto the rim. This exerts a downward force of 600 N on the front of the rim. The front of the rim is 1.1 m in front of the front edge of the portable basketball goal%u2019s base. The mass of the whole portable basketball goal is 70 kg. The center of gravity of the portable basketball goal is 1.0 m behind the front edge of its base.
a. How much torque is produced around the front of the goal base by the 600 N force Matt exerts on the front of the rim?
b. How much torque would be needed to tip the goal?
c. What is the largest vertical force that can be exerted on the front edge of the rim before the portable basketball goal begins to tip?
Answer:
a) τ₁ = 660 N m, b) τ’= 686 N m, c) F = 623.6 N
Explanation:
a) For this exercise let's use the concepts of torque and rotational balance.
For this we set a reference system at the base and assuming that the counterclockwise rotations are positive
where the force F = 600 N, the distance to the axis is x = 1.1 m, the mass of the system m = 70g and the weight is placed at the point of the center of gravity x_{cm} = -1.0 m
The torque at the front is
τ₁ = F x
τ₁ = 600 1.1
τ₁ = 660 N m
b) let's write the rotational equilibrium condition
∑ τ = 0
τ'- W x_{cm} = 0
τ ’= mg x_{cm}
τ’= 70 9.8 1.0
τ’= 686 N m
c) the greatest force Matt can apply
τ’= F x
F = τ’/ x
F = 686 / 1.1
F = 623.6 N
___________containing powerful telescopes have been built throughout the world to study features of stars, galaxies, planets, and other objects in the sky
a
heliocentric model
b
Space Station
c
star chart
d
Observatories
WILL GIVE BRAINLIEST
1. In a demonstration, Mr. K stretches a steel wire to a length 1.23 meters and braces both ends so that they are not free to vibrate. He attaches a fancy piece of equipment which he calls a mechanical oscillator to the wire and explains how it works. Then Mr. K turns the oscillator on and tunes the frequency to 588 Hz. To the amazement of the class, the wire begins vibrating in the sixth harmonic wave pattern. a. Determine the speed of waves within the wire. b. Determine the frequency at which the wire will vibrate with the first harmonic wave pattern. c. Determine the frequency at which the wire will vibrate with the second harmonic wave pattern.
Answer:
a.241.08 m/s b. 196 Hz c. 392 Hz
Explanation:
a. Determine the speed of waves within the wire.
The frequency of oscillation of the wave in the string, f = nv/2L where n = harmonic number, v = speed of wave in string, L = length of string = 1.23 m.
Since f = 588 Hz which is the 6 th harmonic, n = 6. So, making v subject of the formula, we have
v = 2Lf/n
substituting the values of the variables into v. we have
v = 2 × 1.23 m × 588Hz/6
v = 241.08 m/s
b. Determine the frequency at which the wire will vibrate with the first harmonic wave pattern.
The first harmonic is obtained from f when n = 1,
So, f = v/2L = 241.08 m/s ÷ 1.23m = 196 Hz
c. Determine the frequency at which the wire will vibrate with the second harmonic wave pattern.
The second harmonic f' = 2f = 2 × 196 Hz = 392 Hz
A 10 ohms resistor, 10 mh inductor, and 10micro farad capacitor are connected in series with a 10khz voltage source. The rms current through the circuit is 0.20A. Find the rms voltage drop across each of the three elements
Answer:
126 V
Explanation:
The computation of the rms voltage is shown below:
= I × R
=(.2) × (10)
= 2 V voltage drop across capacitor
= I × 1 ÷ (?C)
= I ÷ (2 × pi × f × C)
= (.2) ÷ (2 × pi × 10,000 × 10 × 10^-6)
= .318 V voltage drop across inductor
= I × ?L
= I × 2 × pi × f × L
= .2 × 2 × pi × 10,000 × .010
= 126 V