Answer:
true
Explanation:
I need help plssss!!!!
Answer:
C
Explanation:
The other answers don’t make sense
will mark as brainliest . pls help
Answer:
answer D
Explanation:
circuit breaker is useful when you do something with your domestic electric circuit..
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.
(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 mass of a body?
Explanation:
The mass of a body is its inertia or resistance to change of motion. Mass can therefore be measured either by the amount of force necessary to impart to the body a given motion in a given time or by the acceleration produced by a given force. ...
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
Where is the most and the least KENETIC ENERGY
Answer:
Where is kinetic energy the least?, and most?
Explanation:
Least : When the Moon is farthest from Earth in its nearly elliptical orbit, its speed is least. Its kinetic energy has become least, and its potential energy is greatest.
Further : Kinetic energy, form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.
May be different for you, but i really hope I helped out.
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.
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.
What are some of the skills required to play floor hockey?
Answer:
Skills required to play floor hockey include passing, receiving passes, shooting, stick- handling (dribbling), defensive skills and goaltending. Players are allowed to use both sides of the blade of the stick. The front side is called the forehand (face) and the back side is called the backhand.
Could someone please help me..?
The effect an electric charge has on other charges in the space around it is the charge's:
friction
electric current
electric field
induction
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)
Why is the global temperature increasing? Explain the science behind it.
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 :(
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?
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.
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.
Define atmospheric pressure
Answer:
tmospheric pressure, force per unit area exerted by an atmospheric column (the entire body of air above the specified area)
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.
Noah and Nina are 15 m apart in a closed room. Noah
says the same sentence twice. The first time, Nina
does not hear the sound, but she does hear the
sentence the second time.
What best describes the difference between the
second sound wave and the first?
The second sound wave reflects off the walls of the
room, so Nina is able to hear the sound.
O The second sound wave travels faster to Nina, so
less energy is dissipated through the air.
O The air molecules in the compressions of the
second wave are more dense, so the sound is
louder
The air molecules in the second wave are spaced
evenly, so a high-frequency wave is produced.
Answer:
The air molecules in the compressions of the second wave are more dense, so the sound is louder.
Explanation:
In a closed room, Noah and Nina are sitting 15 m apart.
As Noah says the same sentence twice, Nina does not hear the sound the first time but she does hear the sentence the second time.
This happens as the air molecules in the compressions of the second wave are more dense. As a result, the sound is louder.
The correct option is ''The air molecules in the compressions of the second wave are more dense, so the sound is louder''
Answer:
C. The air molecules in the compressions of the second wave are more dense, so the sound is louder.
Explanation:
I can confirm that the answer to your question is C.
Is this correct is so what is wrong I will give Brainlist
Answer:
yes
Explanation:
what is the mass of modelling clay?
the mass of modelling clay is 500g
A force of 120 N is acting on a surface of area 100 cm 2 . Calculate the pressure acting on the surface.
Answer:
Thrust is the force acting normally to a surface. So, Thrust = 1200 N. And , Pressure = Thrust / Area. = 1200 / 0.001. = ...
Explanation:
this right like me
An arrow is fired downward at an angle of 45 degrees from the top of a 200 m cliff with a velocity of 60.0 m/s.
A.how long will it take the arrow to hit the ground?
B.how far from the base
Answer:
A) 3.39 seconds
Explanation:
A) How long will it take the arrow to hit the ground?We can find the time it takes the arrow to hit the ground by using a constant acceleration equation.
Let's make the positive direction upwards and the negative direction downwards. Let's list out the relevant variables:
v₀ = -60 m/sΔy = -200 ma = -9.8 m/s² t = ?Find a constant acceleration equation that contains these four variables.
Δy = v₀t + 1/2at²Substitute known values into the formula and solve for t.
-200 = (-60 · cos(45))t + 1/2(-9.8)t² -200 = (-30√2)t - 4.9t² 0 = -4.9t² - (30√2)t + 200Use the quadratic formula to continue solving for t.
[tex]\displaystyle \frac{-b \pm \sqrt{b^2-4ac} }{2a}[/tex][tex]\displaystyle \frac{-(-30\sqrt{2})\pm \sqrt{(-30\sqrt{2})^2 -4(-4.9)(200)} }{2(-4.9)}[/tex] [tex]\displaystyle \frac{30\sqrt{2} \pm \sqrt{1800+3920} }{-9.8}[/tex][tex]\displaystyle \frac{30\sqrt{2} \pm \sqrt{5720} }{-9.8}[/tex]From this, when we add the discriminant we get -12.04664168. When we subtract the discriminant we get 3.38819129.
Since time cannot be negative, the time it takes for the arrow to hit the ground must be 3.39 seconds.
Answer:V^2=U^2+2gSIN45S
60^2=2asin45x200
3600=400sin45(a)
3600=282•84a
a=3600/282•84
a=12m/s^2
S=ut+0•5gt^2
200=0•5(12)t^2
200=6t^2
t^2=200/6
t^2=33.33
t=5.77s
Explanation:
PLEASE HELP
Question: How do the number of beats relate to the frequencies of the two sound waves?
Answer:
The beat frequency is always equal to the difference in frequency of the two notes that interfere to produce the beats. So if two sound waves with frequencies of 256 Hz and 254 Hz are played simultaneously, a beat frequency of 2 Hz will be detected. ... These sounds will interfere to produce detectable beats.
Explanation:
What is the velocity of an 80 kg person skating across the ice with a kinetic energy of 16, 000 joules?
Answer:
V = 20 m/s
Explanation:
Given the following data;
Mass = 80kg
Kinetic energy = 16,000 joules
To find the velocity;
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Substituting into the formula, we have;
16000 = ½*80*V²
16000 = 40V²
V² = 16000/40
V² = 400
Taking the square root of both sides, we have;
V = 20 m/s
A negative charge of -2.5 C and a positive charge of 2.0 C are separated by 100 m. What is the force between the two charges?
Explanation:
F = k |q1| |q2| / r^2
k = 9 * 10^9
q1 = - 2.5 C
q2 = 2 C
r = 100
r^2 = (10^2)^2 = 10^4
F = (9*10^9) * ( 2.5 ) ( 2) / ( 100)^2
F = 45* 10^9 / 10^4
F = 45 * 10^9 * 10 ^ -4 = 45 * 10^5 N
F = 45 * 10 ^ 5 N
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
-7 and a number 12 units to the rights of -7
Answer:
5
Explanation:
Move 12 spots to the right from -7 on the number line.
10 Points
The low density gas layer surrounding a star is known as the
O A. Corona
B. Core
C. Convective zone
o
D. Radiative zone
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