Answer:
Refraction
Explanation:
A pencil bends when it enters the water media due to the phenomenon of refraction.
Refraction is one of the properties of waves. Refraction of light occurs which it crosses from a region having different density values. Water is denser than air. As light moves from air to wave it becomes refractedSteve and Jose drove Jose's car to the beach during Spring Break. The 495 kilometer drive took them 8 hours and 30 minutes. What was their average speed for the trip?
Answer:
58.24 Km/h.
Explanation:
From the question given above, the following data were obtained:
Distance (d) = 495 Km
Time (t) = 8 h 30 mins
Speed (S) =?
Next, we shall express 8 hours 30 mins to hours.
We'll begin by convert 30 mins to hour.
60 mins = 1 h
Therefore,
30 mins = 30 mins × 1 h/ 60 mins
30 mins = 0.5 hour.
Thus,
8 h 30 min = 8 + 0.5 = 8.5 hours
Speed is define as the distance travelled per unit time. Mathematically, it is expressed as:
Speed = Distance /time
With the above formula, we can obtain the speed as shown below:
Distance (d) = 495 Km
Time (t) = 8.5 hour
Speed (S) =?
Speed = Distance /time
Speed = 495 Km / 8.5 hour
Speed = 58.24 Km/h
Thus, the speed is 58.24 Km/h.
Obi Wan Kenobi is force pushing some bad guys into a forcefield. The bad guys (m= 300 kg) were originally at REST 5 meters away from the forcefield. It took them 0.5 seconds to hit the forcefield. How much force does Obi Wan apply?
Answer:
F = 12000 N = 12 KN
Explanation:
First we need to find the acceleration of the bad boys by using second equation of motion:
s = Vi t + (1/2)at²
where,
s = distance covered = 5 m
Vi = Initial Velocity = 0 m/s
t = time taken = 0.5 s
a = acceleration = ?
Therefore,
5 m = (0 m/s)(0.5 s) + (1/2)a(0.5 s)²
a = 2(5 m)/(0.5 s)²
a = 40 m/s²
Now, we calculate the force applied by Newton's Second Law:
F = ma
where,
F = force = ?
m = mass of bad guys = 300 kg
Therefore,
F = (300 kg)(40 m/s²)
F = 12000 N = 12 KN
John argues that energy is not conserved because when someone presses the brakes in a moving car, kinetic energy is lost. What should you say to correct John?
katniss shoots an arrow horizontally frok a height of 1.8m. if the arrows initial velocity is 32m/s , how far will the arrow travel before hitting the ground
Answer:
19.5 m
Explanation:
EN LANZAMIENTO DE PROYECTILES, LA VELOCIDAD HORIZONTAL
PERMANECE CONSTANTE.
PRIMERO ENCUENTRA LA VELOCIDAD VERTICAL
[tex]v^{2}[/tex]y = 2([tex]9.80 m/s^{2}[/tex])(1.8 m) = [tex]\sqrt{35.3 m^{2}/s^{2}}[/tex] = 5.94 m/s
LUEGO ENCUENTRAS EL TIEMPO QUE LA FLECHA PERMANECE EN EL
AIRE.
t = 5.94 m/s /[tex]9.80 m/s^{2}[/tex] = 0.61 s
FINALMENTE ENCUENTRAS LA DISTANCIA HORIZONTAL TOTAL.
x = 32 m/s(0.61 s) = 19.5 m
A boat with a horizontal tow rope pulls a waterskier. She skis off to the side, the rope makes an angle of 15° with the forward direction of motion. If the tension in the rope is 180 N, how much work does the rope two on the scare during the forward displacement of 300 m?
Answer:
13,976.23JoulesExplanation:
Workdone by the rope is expressed using the formula;
W = Fd sin(theta)
F is the tension in the rope = 180
d is the displacement = 300m
theta is the angle of inclination = 15°
Substitute the given parameters into the formula;
W = 180(300)sin15
W = 54000sin 15
W = 13,976.23
Hence the workdone by the rope is 13,976.23Joules
19. What ingredient makes Electronic Cigarettes and Traditional Ones addictive?
(5 Points)
Tar
Nicotine
Chemicals
all of the above
Answer:
it is nicotine
Explanation:
your welcome
Answer:
Nicotine
Explanation:
A carton of milk contains 128 ounces. Sara’s son drinks 4 ounces of milk at each meal. How many 4-ounce servings will one carton of milk provide? There are _____ servings.
Answer:
32 four ounce servings
Explanation:
if you take the total amount of ounces the carton holds (128 ounces)and divide it by the number of ounces the son consumes per serving(4ounces) you will get the total amount of servings(32servings)
What happens in the gray zone between solid and liquid?
MORE POINTSSSSSSS TAKE 'EM SOOOONNNNNN
Please Answer the question to get them
Answer:
Hence from liquid to solid or solid to liquid the transition has to cross the grey zone. This grey zone transition is is very crucial which includes the intermolecular forces acting on the molecules and each atoms which makes the change in state from hot to cold and cold to hot.
Explanation:
Calcular el diámetro que debe tener en el embolo mayor un gato hidráulico, para obtener una fuerza de 3500N. Cuando el embolo menor tiene un diámetro de 16 cm y se le aplica una fuerza de 250N
Responder:
0.6 m
Explicación:
Responder:
0,15 m
Explicación:
Paso uno:
dado
Fuerza F = 250N
diámetro d1- 16 cm am = 0.16 m
A1 = πd1 ^ 2/4 = 3.142 * 0.16 ^ 2/4
= 0.02 m ^ 2
Carga L = 3500N
A2 =?
Segundo paso:
sabemos que la presión aplicada a un extremo para levantar una carga en el otro extremo se expresa matemáticamente como
F1 / A1 = F2 / A
sustituir
250 / 0.2 = 3500 / A
cruzar multiplicar
A2 = 0.02 * 3500/250
A2 = 70.3 / 250
A2 = 0.28
sabemos que área = πd ^ 2/4
0.28 = πd2 ^ 2/4
0.28 = 3.142 * d2 ^ 2/4
0.28 * 4 / 3.142 = d2 ^ 2
0.36 = d ^ 2
d = √0.36
d = 0.6 m
el diámetro debe ser de 0.6 m
What does the concentration of damaging earthquakes indicate about the underlying rock structure of the area?
Answer:it is unstable and may be fragmented or lie along a fault line
Explanation:
A car traveling at 100km/hr .how many hours will it take to cover a distance of 750 km
Answer:
7.5 right?
Explanation: if im wrong shoot me
Answer:
7.5 hours( 7 hours 30 minutes)
Explanation:
Speed = distance/time
time = distance/speed
750 km divided by 100 km/hr = 7.5 hours
300 watts of power is produced over 15 seconds. How much work was done transferring the power?
Answer:
4500
Explanation:
Formula: power x time
300 x 15 = 4500
10. A car starts from rest and travels for 5.0 s with a constant acceleration of -1.5 m/s/s.
A. What is the final velocity of the car?
B. How far does the car travel in this time interval?
Answer:
a.-7.5 m/s
b.18.75 m
Explanation:
hope it helps
HEEEEELLLPPPPPP!!!!!!!!!!! PPPPPPPPPPPLLLEAASSEE!!!
I will give brainliest
Why do the north poles of these two magnets repel each other?
Answer:
The arrows always start at the magnet's north pole and point towards its south pole. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).
In each case, three charged particles are fixed in place at the vertices of an equilateral triangle. The triangles are all the same size. Rank the magnitude of the net electric force on the lower-left particle. Greatest ______ _______ _______ _______ Least Explain your reasoning.
Answer:
hello your question is incomplete attached below is the complete question
answer : [tex]F_{E} > F_{F} > F_{A} = F_{B} > F_{C} =F_{D}[/tex]
Explanation:
The explanation behind the reasoning is attached below
Ranking the magnitude of the net electric force on the lower-left particle from the greatest to the least
[tex]F_{E} > F_{F} > F_{A} = F_{B} > F_{C} =F_{D}[/tex]
The magnitude of the net electric force on the lower-left particle. greatest to least in order of [tex]\rm F_E > F_F > F_A= F_B > F_C=F_D[/tex]
What is electric force?The electric force between the two charges is directly propotional to the product of the charge and inversly propotional to the square of the distance between them.
The electric force for each case found as;
[tex]\rm F_1 = \frac{2K q^2}{q^2} \\\\ \rm F_2 = \frac{2K q^2}{q^2} \\\\[/tex]
[tex]\rm F_3= 2 m \\\\ \rm \rm F_4= 4\sqrt{3} m\\\\ \rm F_5= 4m[/tex]
Hence the magnitude of the net electric force on the lower-left particle. greatest to least in order of [tex]\rm F_E > F_F > F_A= F_B > F_C=F_D[/tex]
To learn more about the electric force refer to the link;
https://brainly.com/question/1076352
Which one is it
Plz help me :)
Answer:
5 I think will be none of the above and 6 could be all of the above
Which of the following statements about the unit of measurement called the Newton is true? Select the two correct answers.(1 point)
As an object's distance from Earth increases, its Newtons increase.
The Newton is used to measure gravitational force.
The Newton is used to measure mass of objects.
An object with a mass of 1 kilogram has a gravitational attraction to Earth of about 9.8 Newtons.
Answer:
The Newton is used to measure gravitational force.
An object with a mass of 1 kilogram has a gravitational attraction to Earth of about 9.8 Newtons.
Explanation:
The two true correct statements about the unit of measurement called the Newton are ,
Newton used to measure gravitational force.
An object with a mass of 1 kilogram has a gravitational attraction to Earth of about 9.8 Newtons.
Therefore the correct answers are the option c and option D
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
The mathematical expression for Newton's second law is as follows
F = ma
Where F represents the force.
The SI unit of force is Newton.
Newton used to measure gravitational force.
An object with a mass of 1 kilogram has a gravitational attraction to Earth of about 9.8 Newtons.
Thus, the correct answers are the option C and option D
To learn more about Newton's second law, refer to the link here;
brainly.com/question/13447525
#SPJ2
Please help! I really need it.
I believe the answer is Justine, correct me if I’m wrong.
If you want to increase the acceleration of a baseball when you throw it, what must you increase to make this happen?
A. Acceleration
B. Newton's 2nd law
C. Force
B. Mass
Answer: I think c force
Explanation:
A skier descends a mountain at an angle of 35.0º to the horizontal. If the mountain is 235 m long, what are the horizontal and vertical components of the skier's displacement?
Choose the pair of elements that will most likely have the least ionic character.
a. Na and Cl
b. O and Cl
c. H and O
d. Na and O
Answer:
b. O and Cl
Explanation:
Which statement correctly describes plastic?
A. It has a low resistivity and allows charges to move freely.
B. It has a high resistivity and prevents charges from moving freely.
C. It has a high resistivity and allows charges to move freely.
D. It has a low resistivity and prevents charges from moving freely.
Answer:answer is B
Explanation:
scientific laws explain _________
a) why a pattern in nature occurs
b) strong evidence in support of a hypothesis
c) how a pattern in nature occurs
d) a pattern in nature observed over and over
Answer:
Answer:
Explanation:
Explanation:
I think its D.
3. When two liquids are mixed and a solid
forms as a reaction, the solid is called a
A. precipitate
participant
c. percipitate
D. polypeptide
And why?
Answer:
D
Explanation:
WILL GIVE BRAINLIEST (c) 3 pts. In order to stop the evil Magneto, Jean Grey needs to fly from
rest on the ground to the top of the Statue of Liberty (46 m) in 2.0
seconds. What is her minimum average acceleration during her
ascent? Assume constant
acceleration for the entire distance and that
she does not decelerate near the top.
Answer:
Acceleration, [tex]a=23\ m/s^2[/tex]
Explanation:
Given that,
The statue of Liberty is at a height of 46 m.
Jean Grey needs to fly from rest on the ground to the top of the Statue of Liberty (46 m) in 2.0 seconds.
We need to find her minimum average acceleration during her ascent. Let it is t. Using the second equation of motion to find it.
[tex]h=ut+\dfrac{1}{2}at^2\\\\h=\dfrac{1}{2}at^2\\\\a=\dfrac{2h}{t^2}\\\\a=\dfrac{2\times 46}{(2)^2}\\\\a=23\ m/s^2[/tex]
So, the constant acceleration is [tex]23\ m/s^2[/tex] for the entire distance.
a.
Study harder than everyone else
c.
Learn faster than other students
b.
Study more often than everyone else
d.
Make studying part of their daily routine
Please select the best answer from the choices provided
A
B
C
D
Answer:
d one
Explanation:
d one frome my site
Answer:
d
Explanation:
d
What happens to an object at rest if there is no net force
on the object?
Answer:it will continue in its state of rest.
Explanation:
A crane moves a 250 kg scoreboard from the ground to the height of 100 m. What is the work done on the scoreboard?
Answer:
You will have to do the last PE - the initial PE
Explanation:
Which of the following examples shows the greatest amount of biodiversity
Question 2 options:
A large amount of salmon swimming upstream
A lake full of a larger variety of fish, frogs, and birds
A densely populated city full of all different kinds of people
An empty field where only grass and insects are living
Answer:
A lake full of a larger variety of fish, frogs, and birds
What causes the attraction between protons and neutrons?
Answer:
The nuclear force
Explanation:
hope this helps