Answer:
Tiempo, t = 6.11 segundos.
Explanation:
Dados los siguientes datos;
Distancia = 140 m
Aceleración = 7,5 m/s²
Dado que el objeto partió del reposo, su velocidad inicial es igual a 0 m/s.
Para encontrar el tiempo, usaríamos la segunda ecuación de movimiento;
S = ut + ½at²
Dónde;
S representa el desplazamiento o la 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;
140 = 0*t + ½*7.5*t²
140 = 0 + 3.75t²
140 = 3.75t²
Dividiendo ambos lados por 3,75, tenemos;
t² = 140/3.75
t = √37.33
Tiempo, t = 6.11 segundos
HELP PLZZZ I will give brainliest to who ever helps me the fastest plzzzzzzzz.
Answer: space race automobiles
Explanation:
they were used in space to get to planets
a soccer ball is kicked and left
the ground at angle an 45° above the horizantal, moving at 25 m/s.
calculate for the:
a. hang time of the ball
b. initial horizontal velocity
c. initial vertical velocity
d. maximum height
e. the range travelled by ball
Answer:
Explanation:
Considering that this is parabolic motion, we know that the time the ball is in the air begins the instant it leaves the ground, reaches up to its max height, and then begins falling until it reaches the ground. Duh, right? Some important things happen during this trip. There are a few things we need to know in order to even begin the problem. Parabolic motion has x and y coordinates because it is 2-dimmensional; the acceleration in the x dimension is not the same as the acceleration in the y dimension; the velocity of an object at its max height is always 0; the time it takes to reach its max height (where the max height is half the distance the object travels) is half the time it takes to make the whole trip. Yikes. That's a lot to know and much to remember! Don't you just LOVE physics!?
For a. the hang time is the time the ball was in the air. Some of that stuff we talked about above is pertinent to solving this problem. We know that the velocity of the ball is 0 at its max height, and we also know that if we find the time it takes to reach its max height, we can double that number to find how long it was in the air for the whole trip. Use the one-dimensional equation
[tex]v=v_0+at[/tex] to find out how long it took to reach the max height. Even though we don't yet know the max height, we DO know that the velocity at that point is 0. BUT before we do that, since we are working in the y-dimension only, it would behoove us (benefit us) to find the velocity particular to this dimension. We are going to answer c. first, then backtrack.
c. wants the initial vertical velocity. That is found in the magnitude of the "blanket" or generic velocity times the sin of the angle, namely:
[tex]V_y=25sin(45)[/tex] so
[tex]V_y=[/tex] 18 m/s Now we can use that as the initial upwards velocity in part a:
[tex]v=v_0+at[/tex] and filling in:
0 = 18 + (-9.8)t and
-18 = -9.8t so
t = 1.8 seconds. But remember, this is only half the time it was in the air. The whole trip, then, takes 2(1.8) which is
t = 3.6 seconds
That's a and c. Now for b:
b. asks for the x component of the velocity:
[tex]V_x=Vcos\theta[/tex] which works out to be the same as the vertical velocity, since the sin and cos of 45 degrees is the same:
[tex]V_x=25cos45[/tex] and
[tex]V_x=[/tex] 18 m/s
Onto d:
d. wants the max height. Remember, it took 1.8 seconds to get to the max height, so using yet another one-dimensional equation:
Δx = v₀t + [tex]\frac{1}{2}at^2[/tex] where Δx is the displacement, v₀ is the initial upwards velocity, a is the pull of gravity, and t is the time it takes to reach that max height (Δx, our unknown). Filling in:
Δx = [tex]18(1.8)+\frac{1}{2}(-9.8)(1.8)^2[/tex] and if you do the rounding correctly, you'll end up with this:
Δx = 32 - 16 so
the max height, Δx, is 16 meters.
e. wants the range. That translates to the distance the ball traveled. This is found in a glorified version of d = rt, where d is displacement, r is velocity, and t is...well, time (that doesn't change):
Δx = vt so
Δx = 18(3.6) remember that the ball was in the air for a total of 3.6 seconds, so
Δx = 65 meters.
Phew!!!!! That's a lot! I suggest you learn your physics or this will make you insane by the end of the course!
Answer:
3
Explanation:
0.40N
weight
apple
50 cm
mark
25 cm
45 cm
pivot
Fig. 3.1 (not to scale)
The centre of mass of the apple is 25 cm from the pivot and the centre of mass of the weight
is 45 cm from the pivot.
Calculate
(i) the weight of the apple,
IO
.. [2]
weight =
(11) the mass of the apple.
[1
mass =
Answer:
Explanation:
dwadad
I WILL GIVE BRAINLYEST!!!!1
Examine the following image. Which ocean-floor feature is indicated by the arrow in the image? (10 points)
Public Domain
Group of answer choices
Abyssal plain
Continental slope
Guyot
Seamount
Answer:
Continental slope
Answer: The answer is Seamount. A seamount is a submarine mountain located on oceanic crust near mid-ocean. The image shows a very long seamount in Massachusetts and that is formed by volcanic activity in New England Seamounts.
You are an astronomer who wants to study a faint star in the process of being born, which gives off most of its faint radiation in the infra-red. Which of the following would NOT be a step you would want to take? a. heat your telescope, so its delicate optics are not cold b. try to have your telescope as high above the layers of water vapor in the Earth's atmosphere as possible c. shield your telescope from the radiation given off by your graduate students d. isolate your telescope in very cold surroundings e. make sure your telescope optics are kept as free of dust as possible
Answer:
a. heat your telescope, so its delicate optics are not cold
Explanation:
If star is just born and giving off faint radiation in infrared. These radiation would be long range infra red radiation as the star is just born having less surface temperature.
In order to locate the star through telescope, it must be positioned at higher altitudes so that water vapor is minimum. The radiation from other heating objects might alter the light coming through the cosmos. Therefore, it is mandatory to shield the telescope from foreign radiations.
For the same reason mentioned above the telescope must have cold surroundings. Moreover, optics of the telescope must also be kept free from dust and dirt for clear vision.
However, Heating of telescope in order to safe optics from cold must not be done. This would change the wavelength of long range infra red radiations from star and hence, its location.
Can someone answer this please, I’ll give brainliest and please answer correctly.
If you have 5.6 grams of a radioactive isotope with a half-life of 150 years:
How much of the isotope will you have left after 750 years?
Answer:
0.175g
Explanation:
A = A02^-(t/hl)
= (5.6g)2^-(750/150)
= 0.175g
What happens when you disconnect an electromagnet from battery?
A.it wil explode
B.it will continue to attract non-metals
C.it will stop from attracting metals
E.nothing will happen
Answer:
b.
If you disconnect the wire, the magnetic field disappears and the nail is no longer a magnet. ... The current flowing through the wire makes the wire hot and drains the battery quickly.
Explanation:
A 13 ohm resistor and a 7 ohm resistor are connected in series in a circuit with a 12 volt battery. Assuming negligible internal resistance in the battery, the current in the first resistor listed will be
Answer:
0.923
Explanation:
Use the formula current equals voltage /resistance
What is the relationship between height of high tide and height of low tide for any location? ( Small answer please :) ! )
Answer:
Tides are very long-period waves that move through the oceans in response to the forces exerted by the moon and sun. They originate in the oceans and progress toward the coastlines where they appear as the regular rise and fall of the sea surface. When the highest part or crest of the wave reaches a particular location, high tide occurs; low tide corresponds to the lowest part of the wave, or its trough. The difference in height between the high tide and the low tide is called the tidal range. Tidal range is the height difference between high tide and low tide.
Find the voltage across the 15 Q resistor.
[?] V
No links please
Answer:
Explanation:
same idea as before Liam, first, find the parallel resistance in 35 || 20
(35*20) / (35+20) = 700 / 55 = 12.727272 ohms
now add the 12.727272 + 15 = 27.727272 ohms total resistance
V = IR
10 = I * 27.727272
10 / 27.727272 = I
0.360655 = I
V = IR (again, but across the 15 ohm resistor)
V = 0.360655 * 15
V = 5.4098
Please help, I need help with this question please
Answer:
The car's kinetic energy is 751,500 J.
The car's potential energy is 0 J.
Explanation:
The kinetic energy equation is used as KE = 1/2mv^2 and the potential energy equation is used as PE = mgh. Your mass for the car is 1670 kg and the velocity would be 30 m/s. 30^2 would equal to 900 and you multiply that by 1670 for 1,503,000. Divide that number by 2 since there is 1/2 behind it to get your car's kinetic energy which is 751,500 J.
The potential energy which is calculated by mass times gravitational energy times height would be 0 J. Because the car is at a standard height on the ground, it would make sense for the height to be 0 meters and when multiplying it, your total potential energy would be 0 J.
When studying atoms, scientists can ignore the ______ force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.
Gravitational
Constant
Normal
Fricitional
Answer:
Gravitational
Explanation:
When studying atoms, scientists can ignore the gravitational force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.
Answer:
Gravitational
Explanation:
Calculate Kinetic Energy The potential energy of a swing is 200 J
at its highest point and 50 J at its lowest point. If mechanical
energy is conserved, what is the kinetic energy of the swing at its
lowest point?
Answer:
150J
Explanation:
Pi = Pf + Kf
200 = 50 + Kf
---> Kf = 150J
The kinetic energy of the swing at its lowest point is 150 J.
What is energy?Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
Given in the question the potential energy of a swing is 200 J at its highest point and 50 J at its lowest point
Pi = Pf + K E
200 = 50 + K E
K E = 150 J
The kinetic energy of the swing at its lowest point is 150 J.
To learn more about energy refer to the link:
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Cual es la respuesta a esta p'regunta.
Answer:
Could you translate it to Korean or English...
Explanation:
40POINTS!!!!Sustainable homes are better for the environment than regular homes. What do you think?
Everyone should live in a sustainable home.
Agree
or
Disagree
Answer:
i agree
Explanation:
EASY BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 100pts-
(if you put links or don't answer accordingly im reporting your account)
Answer:
Solution given:
frequency[f]=60,500,000Hz
velocity[V]=300,000,000m/s
wave length=?
we have
wave length=[tex] \frac{V}{f} [/tex]
=[tex] \frac{300,000,000}{60,500,000} [/tex]
=[tex] \frac{3000}{605} [/tex]=4.96 m
Option A.4.96m
Answer:
Its C, the only thing you do is add both of the numbers and get your answer which is C.
Explanation:
a crane lifts four pallets of bricks each of which weigh 5000 N. the crane lifts each pallet a height of 30m. the crane takes 4 minutes to do this how much useful power did the crane produce to life the bricks?
Answer:
625 W
Explanation:
Applying
P = W/t.................... Equation 1
Where p = power, W = Work, t = time
But,
W = Force (F) × distance (d)
W = Fd........................ Equation 2
Substitute equation 2 into equation 1
P = Fd/t.................... Equation 3
From the question,
Given: F = 5000 N, d = 30 m, t = 4 munites = (4×60) seconds = 240 seconds
Substitute these values into equation 3
P = (5000×30)/240
P = 625 Watt
electromagnetic waves are ........... by shiny surfaces.
1. reflected
2. refracted
3. absorbed
Answer:
Electromagnetic waves are reflected
Explanation:
Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. ... This concept is often termed the Law of Reflection.
Electromagnetic waves are reflected by the shiny surfaces. The correct option is 1.
What are electromagnetic waves?These are the rays which mostly come from the Sunlight. It possess energy or defined by energy of photon.
Reflection of light occurs when the waves strike a surface or boundary that does not absorb the energy of the radiation but bounces the waves away from the surface. This is often called the Law of Reflection.
Thus, the Electromagnetic waves are reflected by the shiny surfaces. The correct option is 1.
Learn more about electromagnetic waves.
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An artificial satellite of mass 900kg Is launched at a speed of 11,000 m/s from its launching station. How much is the kinetic energy imparted to it?
Answer:
KE = 54450 J
Explanation:
Data:
m = 900 kgv = 11.000 m/sKE = ?Use the formula:
[tex]\boxed{\bold{K_{E}=\frac{m*(v)^{2}}{2}}}[/tex]Replace and solve:
[tex]\boxed{\bold{K_{E}=\frac{900\ kg*(11.000\frac{m}{s})^{2}}{2}}}[/tex][tex]\boxed{\bold{K_{E}=\frac{900\ kg*121\frac{m^{2}}{s^{2}}}{2}}}[/tex][tex]\boxed{\bold{K_{E}=\frac{108900\ J}{2}}}[/tex][tex]\boxed{\boxed{\bold{K_{E}=54450\ J}}}[/tex]A kinetic energy of 54450 Newtons is imparted to it.
Greetings.
true or false when the net force on an object is zero the forces are unbalanced
the answer is true like and sub to zeelitmotion :
Which statement is the best interpretation of the ray diagram shown?
A. A convex lens forms a larger, virtual image. B. A convex lens forms a larger, real image.
C. A convex mirror forms a larger, real image.
D. A convex mirror forms a larger, virtual image.
Answer:
a convex lens forms a larger, virtual image
Explanation:
The ray diagram shows that a convex lens forms a larger, virtual image. So, option a is correct.
What is meant by a convex mirror?A convex is defined as a lens in which the reflecting surface is bent inwards. It is thicker in the middle and thinner at the edges.
Here,
The convex lenses are the type of lens that can converge the beam of light coming from outside and reflect the rays and focus them on a point at the other side.
Convex lens is also known as a converging lens.
The image of the object here is formed on the opposite side of the object, so it is a virtual image that has been formed here.
The size of the image formed here is larger when compared to the size of the object. Thus larger image formed.
Thus the convex lens formed a larger and virtual image of the object here.
Hence,
The ray diagram shows that a convex lens forms a larger, virtual image. So, option a is correct.
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A car was running in the velocity of 72km/h. What will be its velocity after 5s if it's acceleration is -2m/s^2 ?
Answer:
10m/s
Explanation:
a = v- u/ t
=> v = at + u
= -2 × 5 + 20
= 10m/ s. ( 72 km/ h = 20 m/ s)
:((( please, i need help
Answer:
When you move players towards home plate in order to make the play at home.
For an object of mass m and acceleration a, which equation can be used to
calculate the applied force on the object?
O
A. F =ma
m
B. F =
a
O
C. Fa"
a
D. F
m
SUM
Answer:
The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.
Explanation:
I hope that helps! (B is the answer)
The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.
What is Force?A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the objects.
The force is no longer felt by the two objects when the interaction ends. Only when there is interaction do forces actually exist.
Action-at-a-distance forces are those that happen even when the two interacting objects are not physically touching each other but are nevertheless able to push or pull against each other despite their physical separation.
Therefore, The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.
To learn more about Force, refer to the link:
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What is a conceptual model?
A. An image that helps you understand something complicated
B. A mathematical formula that helps you describe something
C. A computer that can make predictions about something
D. An object that looks just like something you are studying
Answer:
D
Explanation:
A conceptual model is a representation of a system, made of the composition of concepts which are used to help people know, understand, or simulate a subject the model represents.
EASY BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 35pts-
(if you put links or don't answer accordingly im reporting your account)
Answer:
Solution given:
frequency[f]=60,500,000Hz
velocity[V]=300,000,000m/s
wave length=?
we have
wave length=[tex] \frac{V}{f} [/tex]
=[tex] \frac{300,000,000}{60,500,000} [/tex]
=[tex] \frac{3000}{605} [/tex]=4.96 m
Option A.4.96m
Answer:
4.96
Explanation:
Wavelength = Speed ( velocity ) over Frequency
If frequency = 60,500,00 and Velocity = 300,000,000
Then, Wavelength = [tex]\frac{300,000,000}{60,500,00}[/tex] which is equivalent to 4.96
-183° degrees Celsius to kelvin
Answer:
90.15K
Explanation:
The formula is x°C + 273.15 = yK
Answer:
(-183°C) = 90.15K
Explanation:
-183°C is given
Now,
K = °C + 273
K = (-183) + 273.15
K = 90.15
Thus, (-183°C) = 90.15K
-TheUnknownScientist
Marine science what is climate change?
Answer:
In marine ecosystems, climate change is associated with concurrent shifts in temperature, circulation, stratification, nutrient input, oxygen content, and ocean acidification. There are also strong linkages between climate and species distributions, phenology, and demography.
Explanation:
Mark her brainliest
two identical 1.00 x 10^-4 C charges have an electric potential energy of 100 J. how far apart are they. (Unit = m)
Answer: 0.899
Explanation:
acellus
Answer: 0.899
Explanation: It's right in acellus I just did it