AN AIR CRAFT HEADS NORTH AT 320KM/H RELATIVE TO THE WIND THE WIND VELOCITY IS 80KM/HFROMNORTH .FIND THE VELOCITY OF THE AIR RELATIVE TO THE GROUND
Answer:
Explanation:
See attached file for answer.
A disturbance that generates a wave may be a simple pulse or shock
True or false
Answer:
That would be true.
-- a bell starts ringing (wave) when you tap it (simple pulse)
-- a pond starts rippling (wave) when a stone drops in (simple shock)
-- a guitar strings starts waving when you pluck it
Electrical current is defined as _____.
the strength of the electric field
the movement of charge past a certain point per unit time
the potential of the battery
the conservation of charge
Answer:
the strength of the electric field
Select the correct answer from each drop-down menu.
Photosynthesis is a process in which plants prepare food using carbon dioxide, chlorophyll, and water in the presence of sunlight.
During photosynthesis,(blank)
energy is transformed into(blank)
1.Chemical,electrical,kinetic, Solar ?
2.Chemical, Electrical, Kinetic, Solar
Answer:
During photosynthesis solar energy is converted into chemical energy
Explanation:
During photosynthesis solar energy is converted into chemical energy in the form of energy rich bond of ATP molecule.
ATP (Adenosine triphosphate) and ADP (Adenosine diphosphate) molecules are termed currency of energy. ADP molecule is converted into ATP molecules, whenever energy is available in certain exothermic reactions of metabolism.
ATP molecules are store- house of energy. ATP molecule is broken down into ADP molecule in presence of enzyme ATPase, releasing energy whenever energy is required.
The synthesis of ATP molecules, utilizing solar energy during photosynthesis, is termed photo-phosphorylation.
These ATP molecules produced during light reaction of photosynthesis are utilized in dark reaction of photosynthesis (Calvin cycle).
ATP molecules synthesized during photo-phosphorylation may also be used in other metabolic reactions.
Photo-phosphorylation is of 2 types, i.e. Cyclic and Non-cyclic photo-phosphorylation.
Chlorophyll molecules entrap solar energy . There are 2 types of photo-systems in chlorophyll. These are photo-system -I and photo-system-II .
The electrons of chlorophyll molecule of photo-system I get excited which pass through series of electron carriers in electron transport system arranged in the order of decreasing energy level.
During the passage of electrons from carriers of higher energy level to the carriers of lower energy level, the energy is lost which is utilized for converting ADP molecule into ATP molecule.
Photo-system I is concerned with light reaction of photosynthesis only, constituting cyclic photo-phosphorylation.
The electron transport during Photo-system II results in the synthesis of NADPH2 in presence of enzyme NADP reductase. NADPH2 is used in reduction reaction of Calvin cycle.
Both Photo-systems participate in non-cyclic photo-phosphorylation that results in the synthesis of NADPH2 in addition to the synthesis of ATP molecules.
Wo do u think the best male tennis player currently still playing?
1. Rafael nadal
2.Roger federer
3.Novak Djokovic
Answer:
--..-...-...-.---..-...-...
Answer: right now its djokovic
Explanation:
I am a federer and nadal fan but djokovic is dominating. federer has retired and nadal isnt at his best due to injuries and his age.
Fission reactions are currently used to provide energy for many different sources. Where does the energy produced during the reaction come from?
Answer: From the mass lost during the reaction, or the mass defect.
The energy produced during a reaction come from the heat energy which is released during splitting of uranium atoms.
What is a fission?Nuclear energy originates from the splitting of uranium atoms in the atmosphere, a process called as fission. This reaction generates heat energy to produce steam, which is used by a turbine generator to generate electric energy. Because, the nuclear power plants do not burn fuel, they do not produce any greenhouse gas emissions.
Uranium and plutonium are the most commonly used atoms for fission reactions in nuclear power reactors because they are very easy to initiate and control with time. The energy which is released by fission in these reactor heats water into the steam. The steam generated is used to spin a turbine to produce carbon-free electric energy.
Learn more about Fission here:
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Xander goes airborne on his scooter as he exits a half-pipe at Newton's Skate Park. Xander and his scooter have a total mass of 50 kg. The net force acting on Xander and the scooter is 25N. What is Xander's acceleration?
Hello,
QUESTION)According to the 2nd Newton's law,
✔ We have : F = m x a ⇔ a = F/m; with F in N, m in kg, a in m/s²
a = 25/50a =0.5 m/s²Therefore Xander's acceleration is 0.5 m/s².
The total mass of Xander and his scooter is 50 kg and the net force acted due to Xander and his scooter is 25 N then the acceleration will be 0.5 m/s².
What is Acceleration?Acceleration is the rate at which the speed and orientation of a moving object change over time. When a spot or object moves faster or slower along a straight line, it is said to be accelerated. Even though the speed is constant, motion on a circle accelerates so because the direction is always shifting. Both by and to acceleration for all other types of motion.
It is a vector quantity because it has both magnitude and direction.
As per the given information provided by the question,
Mass, m = 50 kg
Force, F = 25 N
F = ma
25 N = 50 × a
a = 25/50
a = 0.5 m/s².
Therefore, the acceleration of Xander's acceleration will be 0.5 m/s²
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To fight a bacterial infection, a patient was given an antibiotic to take for 10 days. After the patient finished taking the antibiotics as directed, almost all the bacteria were killed. After another 10 days, the patient was sick again with the same type of infection.
What most likely happened?
A A few bacteria survived the antibiotics and stopped reproducing.
B The patient’s high fever inactivated the antibiotic, allowing the surviving bacteria to grow rapidly.
C The antibiotic slowed the life cycle of the bacteria.
D Some of the bacteria were resistant to the antibiotic, and they
reproduced.
HELP!!
Answer:
its D
Explanation:
didnt see what u said lol they deleted it again :(
will mark as brainliest . pls help
Answer:
answer D
Explanation:
circuit breaker is useful when you do something with your domestic electric circuit..
who invented Pascal??
If the velocity of a car is 45km/h west, how far can it travel in 0.5 hours
Answer:
22.5km
Explanation:
Since 0.5 of an hour is half of an hour, you have to divide 45 by half, and you would get 22.5 km
Plzzz help!! A stationary speed gun emits a
microwave beam at 2.10x1010 Hz. It
reflects off a car and returns 1030 Hz
higher. What is the speed of the car?
(Unit = m/s)
Answer:
The speed of the car is 14.7m/second or 15 m/second approximately.
Explanation:
A microwave beam at [tex]2.10\times10^1^0Hz[/tex] is generated by a stationary speed gun. It bounces off a car and returns at a higher frequency of 1030 Hz. The car's observed frequency would be the product of adding the two frequencies. That is to say,
F =[tex]2.1\times10^1^0+1030[/tex] =[tex]2.100000103\times10^1^0Hz[/tex]
Using doppler effect formula
[tex]F=\frac{C}{C-V}\times f[/tex]
Where
F = observed frequency
f = source frequency
C = speed of light = [tex]3\times10^8[/tex]
V = speed of the car
Putting the values in the formula -
[tex]2.100000103\times10^1^0=\frac{3\times10^8}{3\times10^8-V}\times2.1\times 10^1^0[/tex]
[tex]\frac{2.100000103\times10^1^0}{2.1\times10^1^0}[/tex] [tex]=\frac{3\times10^8}{3\times10^8-V}[/tex]
[tex]1.000000049=\frac{3\times10^8}{3\times10^8-V}[/tex]
by cross multiplication ,
300000014.7 - 1.000000049V = [tex]3\times10^8[/tex]
Collect the like terms
1.000000049V = 14.71429
Make V the subject of formula
V = [tex]\frac{14.71429}{1.000000049}[/tex]
V = 14.7 m/s
Therefore , the speed of the car is 15m/second approximately.
You ride your bike 5 miles east to school, then 2 miles east to Wawa, return to school, then ride 2 miles west to the library to work on your homework. What is your displacement?
Answer:
3 miles
Explanation:
5 + 2 - 2 - 2 = 3 miles
Putting the moon back to its original size, if it were suddenly to move to twice the
distance from the earth, how would that effect the force of gravitation with the
earth?
(b) Figure 4 shows a car travelling on a motorway.
A passenger wants to check the accuracy of the speedometer of the car.
The car is travelling at a constant speed.
The passenger has a stopwatch.
The lamp posts are 40 m apart.
lamp post
Figure 4
Describe how the passenger could determine the speed of the car as accurately
as possible.
(3)
Answer:
To calculate anything - speed, acceleration, all that - we need data. The more data we have, and the more accurate that data is, the more accurate our calculations will be. To collect that data, we need to measure it somehow. To measure anything, we need tools and a method. Speed is a measure of distance over time, so we'll need tools for measuring time and distance, and a method for measuring each.
Conveniently, the lamp posts in this problem are equally spaced, and we can treat that spacing as our measuring stick. To measure speed, we'll need to bring time in somehow too, and that's where the stopwatch comes in. A good method might go like this:
Press start on the stopwatch right as you pass a lamp postEach time you pass another lamp post, press the lap button on the stopwatchPress stop after however many lamp posts you'd like, making sure to hit stop right as you pass the last lamp postRecord your dataCalculate the time intervals for passing each lamp post using the lap dataCalculate the average of all those invervals and divide by 40 m - this will give you an approximate average speedOf course, you'll never find an *exact* amount, but the more data points you have, the better your approximation will become.
What is the atomic number the atom shown?
A. 3
B. 13
C. 14
D. 27
Answer:
13
Explanation:
Brainlest pls
Answer:
B-13
Explanation:
The protons listed in the atom are 13, and the protons are the same number as the atomic number.
13.If a jet plane with a velocity of 20 m/s at t = 0 accelerates at a rate of 40 m/s²
for 3 seconds, what is its veloaty at time = 3 seconds?
Answer:
140m/s
Explanation:
V=V0+at. V=20+40*3=140m/s
An ant walks 15 m east, then 40 m north, and finally 20 m west. What is the total displacement from the starting point
Answer: 40.311 m
Explanation:
Given
Ant walks 15 m east
then 40 m North and finally 20 m west
from the figure, ant is 40 m North and 5 m west
Using Pythagoras, we can write
[tex]\Rightarrow d=\sqrt{40^2+5^2}\\\Rightarrow d=\sqrt{1625}=40.311\ m[/tex]
How do you think the body deals with consuming a lot more
calories than are burnt?
Answer:
The body stores it as fat
Explanation:
Answer:
The body deals with consuming alot more calories than are burnt by gaining weight or holds it all up, while if you burn your calories, it'll lose weight :3
Explanation:
:3
1
1) If you wanted to save money on your electric bill, all of the following would help except:
OA
using light bulbs that produce more light and less heat
OB.
using a heater that converts more energy into work
O c. lowering the temperature in your hot water
OD. leaving the refrigerator open to increase air circulation
Reset
Next
Answer:
D
Explanation:
I don't know how to explain but D is just weirdly wrong to me.
Three vector are oriented as shown in figure below where. A=20.0units, B=40.0units, And C=30.0. (a) The x and Y component of the resultant vector. (b) The magnitude of the resultant vector. (c) Direction of the resultant vector { please help me}
Answer:
Explanation:
a). Vertical component of vector B = Bsin(45)
= 40sin(45°)
= 28.28 units
Horizontal component of vector B = Bcos(45°)
= 40cos(45°)
= 28.28 units
Vertical component of vector C = Csin(45°)
= 30sin(45°)
= 21.21 units
Horizontal component of vector C = Ccos(45°)
= 30cos(45°)
= 21.21 units
Vertical forces = A + Bsin(45°) - Csin(45°)
= 20 + 28.28 - 21.21
= 27.07
Horizontal forces = Bcos(45°) + Ccos(45°)
= 28.28 + 21.21
= 49.49 units
b). Magnitude of resultant force = [tex]\sqrt{(27.07)^2+(49.49)^2}[/tex]
= [tex]\sqrt{3182.045}[/tex]
= 56.41 units
c). Direction of the resultant force → Along vector B (at an angle of 45° from the horizontal line)
A train and a bicycle have a head-on collision. Compare the force of impact between the train and the bicycle; compare the accelerations of the train and bicycle. (5 points)
Answer:
The train will have a greater impact than the bike
The train will have a bigger net force than the bike, so the acceleration of the train will be slower than the bike. In order to achieve the same acceleration, the train requires a bigger net force.
Un tren de alta velocidad (TAV) o tren bala es aquel que alcanza velocidades iguales o superiores a 200 km/h. La energía que tiene el tren en su recorrido habitual es: *
Answer:
B. Cinética, debido a que esta energía está asociada con la velocidad que posee el tren.
Explanation:
Un tren de alta velocidad (TAV) o tren bala es aquel que alcanza velocidades iguales o superiores a 200 km/h. La energía que tiene el tren en su recorrido habitual es
A. Cinética, debido a que existen trenes elevados los cuales poseen altura y la altura está asociada con la energía cinética.
B. Cinética, debido a que esta energía está asociada con la velocidad que posee el tren.
C. Rápida, porque la energía cinética es sinónimo de rápido.
D. Potencial, debido a la potencia que tiene el tren para moverse.
Solution:
La energía cinética es la energía contenida en un objeto en movimiento. La energía cinética se puede definir como la cantidad de energía necesaria para que un objeto se acelere desde el reposo hasta su velocidad final.
La energía cinética (KE) viene dada por:
KE = (1/2) * masa * velocidad²
Podemos ver que la energía cinética depende de la masa del objeto y la velocidad del objeto.
El tren de alta velocidad posee energía cinética debido a la velocidad del tren.
How much power is needed to lift a 20-kg object to a height of 4.0 m in 2.5 seconds?
Answer:
313.92w
Explanation:
Formula for power:
P=W/∆t = Fv
Givens:
m=20kg
∆y=4.0m
∆t=2.5s
a=9.81m/s²
In order to find power, we first need to solve for work.
W=Fd (force*displacement), f=mg
W=mg∆y
W=(20kg)(9.81m/s²)(4.0m)
W=784.8J
P=W/∆t
P=784.8J/2.5s
P=313.92 watts
A train can travel at 300km/h. How long will it take to to travel 12.000km?
Answer:
Train will take 156 sec to travel 12km.
A yo-yo is twirled on a 4 meter long string so that its tangential
speed is 16 m/s. If the string is only 2 meter long and the revolutions per
second stay constant, what is the new tangential speed?
Answer:
8m/s
Explanation:
i think i had this question on a test i'm taking so i'm assuming i cannot say for sure if this is correct
Una bola se lanza verticlamente de la parte superior de un edificio con una velocidad inicial 25 m/s la bola impacta al suelo en la base del edificio 7 segundos despues de ser lanzada ¿que altura subio la bola
Answer:
S = 415.1 meters
Explanation:
Dados los siguientes datos;
Velocidad inicial = 25 m/s
Tiempo, t = 7 segundos
Para encontrar la altura (desplazamiento) de la pelota, usaríamos la segunda ecuación de movimiento;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Dónde;
S representa el desplazamiento o altura medida en metros.
u representa la velocidad inicial medida en metros por segundo.
t representa el tiempo medido en segundos.
a representa la aceleración medida en metros por segundo cuadrado.
Sustituyendo en la ecuación, tenemos;
[tex] S = 25*7 + \frac {1}{2}*(9.8)*7^{2}[/tex]
[tex] S = 175 + 4.9*49 [/tex]
[tex] S = 175 + 240.1 [/tex]
S = 415.1 meters
A ball is launched horizontally at a speed of 4.0m/s from the top of a cliff that is 24.6 meters high. Where in the ball's trajectory is the horizontal speed a maximum? Explain how you know.
Answer:
The horizontal speed of the ball is constant where there is little resistance from the air
Explanation:
From the given parameters of the ball, we have;
The horizontal speed of the ball = 4.0 m/s
The height of the cliff from which the ball is launched = 24.6 meters
The direction in which the ball is launched = Horizontally
The components of the forces acting on the ball are;
The vertical force = The Earth's gravitational attraction
The horizontal force = 0 N (There are no horizontal forces acting on the ball)
According to Newton's first law of motion, the ball will continue in its uniform motion or in its rest state unless acted upon by a force
Therefore, given that there are no horizontal forces component acting on the ball, (little air resistance) the ball will continue with the initial horizontal velocity, such that the horizontal velocity of the ball remains constant.
In a series circuit, there is a 2-ohm resistor with a current of 5A. If there is another resistor with a resistance of 5 ohms, what is the current inside that resistor?
Answer:
if 2ohms gives 5A
then 5ohms will give 12.5A
since its directly proportional
V=IR
Sunlight is a form of electromagnetic energy.
Please select the best answer from the choices provided
T
F
Answer: True
Explanation: Hope this helps :)