Answer:
Explanation:
Notice that nothing but the mass and height are given, and the mass is not really necessary. It will cancel when we do the problem.
So the potential energy at the top equals the Kinetic energy at the bottom.
PE_top = Ke_bottom
mgh = 1/2 m v^2 Divide by m
mgh/m =1/2 mv^2/m
gh = 1/2 v^2 Multiply both sides by 2
2gh = v^2
Givens
g = 9.81
h = 1.5
Solution
2*9.81 * 1.5 = v^2
29.43 = v^2
v = sqrt(29.43)
v = 5.425
A 5.0-ohm resistor, a 10.0-ohm resistor, and a 15.0-ohm resistor are connected in parallel with a battery. The current through the 5.0-ohm resistor is 2.4 amperes. Calculate the amount of electrical energy expended in the 5.0-ohm resistor in 2.0 minutes.
Answer:
E = 3456 J
Explanation:
The electrical energy expended in a resistor can be easily calculated by using the following formula:
[tex]E = Pt[/tex]
where,
E = Energy Expended = ?
I = current through 5 ohm resistor = 2.4 A
R = Resistance = 5 ohms
P = Electrical Power = VI
Since,
V = IR (Ohm's Law)
Therefore,
P = (IR)(I) = I²R = (2.4 A)²(5 ohms) = 28.8 Watt
t = time taken = (2 min)(60 s/1 min) = 120 s
Therefore,
E = (28.8 Watt)(120 s)
E = 3456 J
Question 5
1 pts
A 1.50 cm tall object is placed 20.0 cm from a concave mirror whose radius
of curvature is 30.0 cm. What is the image height?
Answer:
b
Explanation:
A cartoon plane with four engines can accelerate at 8.9 m/s2 when one engine is running. What is the acceleration of the plane if all four engines are running and each produces the same force?
Answer:
The acceleration of the plane is 35.6 meters per square second.
Explanation:
By Newton's Laws of Motion, we know that force ([tex]F[/tex]), in newtons, is directly proportional to acceleration ([tex]a[/tex]), in meters per square second. That is:
[tex]F \propto a[/tex]
If four engines are running simultaneously and each produce the same force, then we find that acceleration of the plane is:
[tex]a_{T} = 4\cdot \left(8.9\,\frac{m}{s^{2}} \right)[/tex]
[tex]a_{T} = 35.6\,\frac{m}{s^{2}}[/tex]
The acceleration of the plane is 35.6 meters per square second.
Radio waves are the ___ waves and have the ___ amount of energy.
The answer would radio waves have the longest waves and have the least amount of energy.
Hope that helps!
EASY BRAINLIEST!!URGENT PLEASE HELP.
-if you answer correctly ill give you brainliest which will give you 27pts-
Answer: I believe that it is A and D. Or A or D.
A, D
Explanation:
Answer: A and C
Explanation: The rest of the thermal energy goes to the engine making it heat up thats why is can overheat also letting it get destroyed
Label the lettered parts of the wave
Answer:
A: Wavelength
B: Crest
C: Trough
D: Amplitude
HELP IM TIMED. ILL MARK BRAINLIEST PLSSSSSS.
A model rocket accelerates at 15.3 m/s2 with a force of 44 N.
Calculate the mass of the rocket. Round your answer to the nearest tenth of a kg.
The mass of the rocket is kg.
Fill in the blank above. Also what is the formula to find the mass. Include that in the answer pls.
Answer:
According to Newton's Second Law of Motion :
Where,
F = Force Applied
m = Mass of the object
a = Acceleration
Now, we will use this law to solve this question.
Given :
Acceleration or a = 15.3 m/s²
Force = 44 N
Mass = ?
Substitute, the given values in the formula.
F = ma
⇒ m = F/a
m = 44/15.3
m = 2.9 kg
Answer:
7.0 n
Explanation:
Give reasons for the following:
a. We should not see the solar eclipse directly through our unaided eyes.
b. Dark patches are seen on the ground when sunlight passes through dense tree.
Answer:
a)The reason why people are advised not to watch the Solar Eclipse with naked eyes is that when the Moon in direcly between the Earth and the Sun, the rays from the Sun that reach the Earth are more powerful and can permanently damage our retina (most important part of the eye).
Explanation:
b ) The leaves of the trees obstruct (stop) the rays coming from the sun as there is no sun the soil to will be marshy. in some places where the leaves are not thick the sunlight penetrates to the ground... therefore one mostly sees dark patches on the ground in dense forests.
Answer:
The reason why people are advised not to watch the Solar Eclipse with naked eyes is that when the Moon in direcly between the Earth and the Sun, the rays from the Sun that reach the Earth are more powerful and can permanently damage our retina (most important part of the eye).The leaves of the trees obstruct (stop) the rays coming from the sun as there is no sun the soil to will be marshy. in some places where the leaves are not thick the sunlight penetrates to the ground, therefore one mostly sees dark patches on the ground in dense forests.Which of the following is an electric potential?
O A. 2.50
B. 2.5 N
C. 2.5 V
O D. 2.53
Answer:
B
Explanation:
just answered that question
GIZMO
A. Does the car's mass alone determine whether the egg breaks?
B. Does the car's speed alone determine whether the egg breaks?
C. Does the car's momentum determine whether the egg breaks?
D. Does the car's kinetic energy determine whether the egg breaks?
Copernicus patterned his concept of the solar system after that of
Ptolemy
Aristarchus
Galileo
Kepler
Answer:
Aristarchus
Explanation:
don't feel like it
A moving car of mass 1500 kg travels at a constant speed of 4.6 m/s. What is the car's average momentum?
A
6900 kgm/s
B.
1500 kgm/s
C.
2500 kgm/s
D.
3600 kgm/s
Answer:
c
Explanation:
c I think this is the answer
Please help with this
Answer:
D
Explanation:
what is power, and what is its relationship to voltage and amperage?
the net force acting on the ball below is ___ N
The net force applied to the object equals the mass of the object multiplied by the amount of its acceleration." The net force acting on the soccer ball is equal to the mass of the soccer ball multiplied by its change in velocity each second (its acceleration).
PLEASE HELP ME I AM TIMED!
is there any way u can help me
Answer:
get help with your work
try understand your work
ask your teacher for assistance or class
or maybe cheat but understand the work first if you wanna
Un texto de opinión sobre la situación actual del rol de la mujer, el trabajo y las situaciones de violencia en el contexto de Pandemia. Cambió la situación de las mujeres?
Explanation:
Los derechos de las mujeres fueron conquistados a través de importantes luchas llevadas a cabo por mujeres, como el movimiento feminista que tuvo lugar a fines del siglo XIX, cuyo principal reclamo fue el derecho al voto de las mujeres.
Con el tiempo, las mujeres ganaron más derechos y una mayor participación en el mercado laboral y en puestos importantes de la sociedad. Pero aún queda mucho por cambiar, ya que las estadísticas aún muestran que hay pocas mujeres en posiciones de poder en relación a los hombres, y el salario de una mujer que ocupa el mismo puesto que un hombre es siempre menor.
Dado que la sociedad se concibió a través de parámetros sexistas, lo que continúa en la actualidad, es claro que en la pandemia específicamente que generó crisis económicas en todo el mundo, se vio a una gran cantidad de mujeres perder sus empleos, además del expresivo número de casos de violencia doméstica que se agravaron en el período de aislamiento social.
Así que estos hechos solo demuestran que la lucha por la igualdad de género y los derechos de las mujeres aún están en sus inicios, a pesar de muchos logros que las mujeres aún deben luchar por lo básico, que es el apoyo social y político además de una legislación más estricta que castiga con más rigor a las agresoras. Las mujeres deben estar protegidas por la ley y las instituciones y los medios de comunicación deben abordar más el tema y promover el feminismo como una lucha por la igualdad.
An electron acquires 7.45 x 10 ^-16 J of kinetic energy when it is accelerated by an electric field from plate A to plate B. What is the potential difference between the plates, and which plate is at the higher potential?
Answer: Kinetic energy of electron = 7.45 x 10^-16 J We know that Potential difference = Work done per unit charge = Kinetic energy of electron / ( 1.6 x 10^-19 ) = (7.45 x 10^-16) / ( 1.6 x 10^-19) = 4656.25 V
Explanation:
The potential difference between the plates is [tex]4650.43V[/tex]
The Potential difference is also defined as the work done per unit charge.
Work done = kinetic energy = [tex]7.45*10^{-16}J[/tex]
Charge on one electron = [tex]1.602*10^{-19}C[/tex]
Potential difference,
[tex]V=\frac{7.45*10^{-16}}{1.602*10^{-19} }=4650.43Volt[/tex]
Hence, the potential difference between the plates is [tex]4650.43V[/tex]
Learn more:
https://brainly.com/question/12918923
Write 3 major differences between a shadow and a image?
Explanation:
Image Shadow
2. We are able to see images when light refraction enters our eyes.
In the case of shadow no light enters our eyes.
3. Image contains colour, structure etc. of the object.
Shadow does not give any information about the object as it is colourless
Answer:
We know that an image is a picture of an object while shadow is formed an object comes in between the surface and light. ... The formation of image takes place when the light rays are reflected by an object. The formation of shadow takes place when the light falls on an opaque object.
How do the phases change when our perspective changes from the Earth to the Moon?
A book weighing 18.0 N is lifted from the floor and placed on a shelf 1.5 m high. What is the minimum amount of work required to accomplish this
task?
a. 120J
B. 12 J
c.270J
D. 27 J
A book weighing 18.0 N is lifted from the floor and placed on a shelf 1.5 m high. The minimum amount of work required to accomplish this task is
What is Work ?Work done is the amount energy gained (loosed) in bringing the body from initial position to final position. It is denoted by W and its SI unit is joule(J). i.e. Work(W) is force(F) times displacement(s). W=F× s When a body is displaced with 1 newton of force by 1 m, then we can say that work has been done on the body by 1 joule. Writing for it's dimension, W=F× s Force has dimension [L¹ M¹ T²] Displacement has dimension [L¹] multiplying both the dimensions Force and Displacement we get, dimension of Work [L² M¹ T²].
Given,
Weight F = 18 N
Height h = 1.5 m
Work W = F × h = 18 × 1.5 = 27 J
To know more about Work :
https://brainly.com/question/18094932
#SPJ2.
2. A hit used on a ball below the shoulders
1. Bump
2. Set
3. Serve
4. Spike
Answer:
Bump
Explanation:
Also called the forearm pass; An underhand pass hit with your forearms when the ball is below your shoulders; used to receive the serve.
How can we relate density and pressure in liquids ??
How can we relate density and pressure in liquids ??
[tex] \huge{ \texttt{ \red{answers}}}[/tex]
It is the pressure at each point of a static fluid. When we immerse ourselves in a liquid, the pressure increases with depth.In the case of a liquid (constant density) the pressure increases linearly with depth.⭐ ----------------------------------------------------------------------------------⭐
[tex] \bold{BRAINLY MENTALMENTE}[/tex]
Over the course of 30 seconds, 3 waves hit the shore. What is the period of the waves?
Answer:
3 per 10 seconds.
Explanation:
If it's 30 seconds and 3 waves hit throughout that time period, dividing should get you your answer..
30/3 = 10.
Hope this helped!
Source(s) used: N/A
HELP MEEE
Resonance occurs in the middle ear.
Please select the best answer from the choices provided
T
F
Answer:
The answer should be True, but it's False on Edge 2021
Explanation:
이것이 도움이 되었기를 바랍니다.
(✿◡‿◡)
#LearnWithBrainly
-Jiyen~
can someone give me 3 examples of newtons first law of motion
Answer:
1. A biker running into a stop sign.
2. A ball rolling down a hill, being stopped by a car running over it and deflating the ball.
3. A boy kicking a soccer ball on a soccer field.
Explanation:
hey guys this is physical science can i get help
answer:
1=c
2= d
3=e
4=a
5=b
When an object slides,there is less friction than when it rolls
Answer:
False
Explanation:
Rolling friction takes place when an object rolls on the surface. Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction is much less than sliding friction for same pair of bodies. When one body rolls upon another, there is theoretically no sliding or slip between them.
How far can you get away from your little brother with the squirt gun filled with paint if you can travel at 3 m/s and you have 0.25 min before he sees you?
Answer:
s = 45 m
Explanation:
The velocity given in the question is uniform. Hence, the formula for the uniform velocity shall be used here. The formula is given as follows:
[tex]s = vt[/tex]
where,
s = distance traveled away from the brother = ?
v = constant speed = 3 m/s
t = time taken = (0.25 min)(60 s/1 min) = 15 s
Therefore, using these values in the formula we get:
[tex]s = (3\ m/s)(15\ s)\\[/tex]
s = 45 m