Answer:
4cm
Explanation:
If it's a simple ratio 2cm:10N to ?cm:20N, It should be 4cm:20N.
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:
HELP ME PLEASE WITH MY HOMEWORK ILL GIVE BRAINLIEST
Answer: Mass
Explanation:
What makes magnetic objects different from non- magnetic objects?
A 150kg motorcycle starts from rest and accelerates at a constant rate along with a distance of 350m. The applied force is 250N and the coefficient of kinetic friction is 0.03. What is the net force applied to the motorcycle?
Answer:
205N
Explanation:
The net force (F) is the difference between the applied force([tex]F_{A}[/tex]) and the kinetic frictional force([tex]F_{R}[/tex]). i.e
F = [tex]F_{A}[/tex] - [tex]F_{R}[/tex] -----------------(i)
Note that;
[tex]F_{R}[/tex] = μmg
Where;
μ = coefficient of kinetic friction
m = mass of the body
g = acceleration due to gravity = 10m/s²
Equation (i) then becomes;
F = [tex]F_{A}[/tex] - μmg -------------------(ii)
Given from question;
m = mass of motorcycle = 150kg
μ = 0.03
[tex]F_{A}[/tex] = 250N
Substitute these values into equation (ii) as follows;
F = 250 - (0.03 x 150 x 10)
F = 250 - (45)
F = 205N
Therefore, the net force applied to the motorcycle is 205N
Light refracts when it
Please, I need to finish my homework.
An object is to the left of a convex mirror. Describe the two rays needed to indicate the location and height of the image. Additionally, state what side of the mirror the image is on and whether it is real or virtual.
Answer:
mark me as the brainly plss
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
help please physics !!
Answer:
Option A. 1 bar = 1 atm
Explanation:
Pressure has various units of measurement. Each unit of measurement can be converted to other units of measurement. For example:
1 atm = 1 bar
1 atm = 760 mmHg
1 atm = 760 torr
1 atm = 1×10⁵ N/m²
1 atm = 1×10⁵ Pa
With the above conversion scale we can convert from one unit to the other.
Considering the question given above, it is evident from the coversion scale illustrated above that only option A is correct.
Thus,
1 bar = 1 atm
The ship was travelling 77 meters per second, 35 degrees above the x-axis Northeast. Determine the magnitude and direction of the horizontal vector component, Vx
Answer:
vₓ = 63.07 m/s
Explanation:
The horizontal vector component of the velocity can be found by the following formula:
[tex]v_x = vCos\theta[/tex]
where,
vₓ = horizontal vector component of velocity = ?
v = magnitude of velocity = 77 m/s
θ = angle with x-axis = 35°
Therefore,
[tex]v_x = (77\ m/s)Cos\ 35^o[/tex]
vₓ = 63.07 m/s
Si está probando u motor para un nuevo modelo de coche ; este es capaz de pasar de 0 a 100 km/h en 7,5 segundos . Si el coche tiene una masa de 550 kg cuál será la fuerza que realiza el motor ?
Answer:
La fuerza que realiza el motor es 2035 N.
Explanation:
Podemos encontrar la fuerza del motor usando la siguiente ecuación:
[tex] F = ma [/tex] (1)
En donde:
m: es la masa del coche = 550 kg
a: es la aceleración
Se puede calcular la aceleración mediante la siguiente ecuación cinemática:
[tex] v_{f} = v_{0} + at [/tex] (2)
En donde:
[tex] v_{f}[/tex]: es la velocidad final del coche = 100 km/h
[tex] v_{0} [/tex]: es la velocidad inicial del coche = 0
t: es el tiempo = 7,5 s
Resolviendo la ecuación (2) para "a" tenemos:
[tex] a = \frac{v_{f} - v_{0}}{t} = \frac{100\frac{km}{h}*\frac{1000 m}{1 km}*\frac{1 h}{3600 s} - 0}{7,5 s} = 3,70 m/s^{2} [/tex]
Entonces, la fuerza es:
[tex] F = ma = 550 kg*3,70 m/s^{2} = 2035 N [/tex]
Por lo tanto, la fuerza que realiza el motor es 2035 N.
Espero que te sea de utilidad!
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:
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.
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:
how long does it take a ball to fall 5 meters
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.
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
Explain how interactions can both benefical and harmful to the organisms in an community
There are 2 ways of collecting the sun’s energy. What are they? Give an example of each.
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:
brainly.com/question/1932868
#SPJ2
1 Newton = 1,,,,,,,,
Answer:
kg*m/2
Explanation:
hope this helps just did it
Answer:
c
Explanation:
2.List two changes an unbalanced force can cause.
Answer:
By applying an unbalanced force, you can change the motion of an object. Unbalanced forces can make an object at rest start moving, make a moving object stop, or change the direction and speed of the object.
Explanation:
Three resistors of values 2 Q, 3 Q and 5 Q are connected in series with a battery of voltage 6.0 V. Calculate the current through each of the resistors, and the current through the battery.
Answer:
Current = 0.6 A
Explanation:
Given that,
Three resistors 2 ohms, 3 ohms and 5 ohms are connected in series with a battery of voltage 6 V.
In series combination of resistors, the current through each resistor is the same while the voltage divides.
The equivalent resistance in this case is given by :
[tex]R_{eq}=R_1+R_2+....[/tex]
Put all the values,
[tex]R_{eq}=2+3+5\\\\R_{eq}=10\ \Omega[/tex]
Let I be the current. Using Ohm's law,
[tex]V=IR\\\\I=\dfrac{V}{R}\\\\I=\dfrac{6}{10}\\\\I=0.6\ A[/tex]
So, the current through each resistor and the current through the battery is equal to 0.6 A.
-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
4-year-old becomes frightened of the dark and refuses to go to sleep at night. How would a psychoanalyst and a behaviorist differ in their views of how this problem developed?
Answer:
A psychoanalyst would see the 4-year-old as having an unresolved conflict where the brain judges or evaluates how good or bad the darkness is, or the usefulness of sleeping in the dark at night based on a comparison, due to the child's exploration of the world around him. A psychoanalyst might see the child's refusal to sleep at night due to the dark as a fear created for instance when the child sleeps alone without the parent. This might change if the child sleeps at night beside the parent in the dark.
While behaviorists would look at how having previous negative experiences in the dark influences a child's behavior towards staying in the dark. This fear would be reinforced with more negative experiences in the dark such as having a bad nightmare whenever the child sleeps in the dark, a feeling of hearing, or seeing strange things while in the dark. These examples would have built a behavioral pattern where the child would be conditioned to respond fearfully to being in the dark.
What is globalization?
Answer:the process by which businesses or other organizations develop international influence or start operating on an international scale.
Explanation:
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
Indicar objetosque puedan ser observados a simple vista, con microscopio, con microscopio electrico y con miscroscopio de transmicion. Indicar cuel es orden de magnitud de cada uno
Answer:
En esta respuesta voy a usar la unidad μm, tal que:
1 μm = 1*10^(-9) m
Objetos que pueden ser observados a simple vista:
Son todos aquellos objetos que podemos observar simplemente con nuestros ojos, con ellos podemos observar desde un edificio (con tamaños de decenas de metros) hasta algunos cabellos, que pueden tener un diámetro de 0.1 mm
Cosas más pequeñas que estás muy difícilmente se pueden ver a simple vista.
Con un microscopio podremos ver cosas del tamaño de una célula, como glóbulos blancos, rojos, algunos microorganismos, etc, los cuales rondan un tamaño de unos 10 μm. Naturalmente, distintos microscopios tendrán distintas amplificaciones (por lo que con algunos podremos ver objetos muy pequeños que con otros no).
Microscopio eléctrico:
Este microscopio usa electrones en lugar de luz para formar imágenes.
Con él podremos observar cosas como las componentes de una célula (membranas, orgánulos grandes, etc), los cuales pueden medir unos pocos nanómetros (por ejemplo, una membrana celular tendrá un tamaño de entre 5 μm y 10 μm)
Microscopio de transmisión.
Tener en cuenta que el microscopio de transmisión es un microscopio eléctrico, el cual lanza un haz de electrones al objeto que se desea observar, de tal forma que algunos de estos electrones rebotan formando así la imagen virtual amplificada que podemos observar.
Con estos aparatos podemos ver orgánulos pequeños (0.5 μm), y lo más pequeño que podemos ver (con los microscopios más potentes) son columnas de átomos (0.1 μm)
The Playground
A and G are at same height and where
skateboarder starts
E
A
G
ao oon
E
С
vai
OOHO
F
D
O meters
List in order from greatest to least the Kinetic energy from greatest to least.
Drag the boxes in the correct order
1
1
DDDDDD
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.
To learn more about, convex lens, click:
https://brainly.com/question/12213784
#SPJ7
which kind of energy is the most common by-product of the energy transformation?
Answer:
kinetic energy
Explanation:
it is most common