Answer:
t = 125 seconds
Explanation:
Given that,
The mass of a train, m = 50,000 kg
Initial speed, u = 5 m/s
Stopping force, F = 2000 N
We know that,
Force, F = ma
Where
a is acceleration
[tex]F=\dfrac{m(v-u)}{t}\\\\t=\dfrac{m(v-u)}{F}\\\\t=\dfrac{50000(0-5)}{-2000}\\\\t=125\ s[/tex]
So, it will take 125 seconds to stop the car.
What is only found in plant cells??
Cell membrane , nucleus, cell wall , vacuole.
which one !!!
What effect would constriction of the blood vessels have on the body?
Answer:
When blood vessels constrict, the flow of blood is restricted or decreased, thus retaining body heat or increasing vascular resistance. this makes the skin turn paler because the blood reaches the surface, reducing the radiation of heat. hope this helps
Reflection off of a smooth surface like a mirror is an example of diffuse reflection.
true or false?
Answer:
true
Explanation:
Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. ... This is called diffuse reflection. Diffuse reflection is when light hits an object and reflects in lots of different directions.
Answer:
false
its regular reflection.
hope it helps.
what is the conclusion of coin and feather experiment?
Answer:
So the conclusion is that in presence of air net force acting downward reduces for feather and hence falls slower than coin. But in absence of air resistance, net downward force is just equal to force due to gravity which is same for both coin and feather and hence they fall down at the same rate.
An object's velocity/speed increases, multiplied by a factor of 7. What factor would its Kinetic Energy increase by?
Answer:
k.E= 49 ms^-2
Explanation:
k.E= 1/2 mv^2
From that formula of k.E
K.E is directly proportional to the ( velocity)^2
K.E directly proportional to (7)^2
so that k.E increase by 49
Which best describes the type of lens that would help someone with one of these eye conditions? Concave lenses would help someone who is nearsighted because the lenses make objects look smaller and closer. Concave lenses would help someone who is farsighted because the lenses make objects look smaller and closer. Convex lenses would help someone who is nearsighted because the lenses can make objects look smaller and closer. Convex lenses would help someone who is nearsighted because the lenses can make objects look larger and farther away.
Answer:
The answer is "Option a".
Explanation:
The concave lenses are there for narrow-sighted people, convex for the far people. In eyewear, curved lenses are used to rectify visibility. Since in nearsighted individuals the width between the eye lens as well as the retina is larger than should be, these readers can't clearly distinguish distant things.
Answer:
The correct answer is - Concave lenses would help someone who is nearsighted because the lenses make objects look smaller and closer.
Explanation:
Concave lenses are related to the condition of nearsightedness whereas convex lens is related to the farsightedness. Nearsightedness is the condition where a person can see closer objects clearly but the objects at a farther distance can not see properly.
Concave lenses make objects look smaller and closer as it makes the image farther than it is actually. It forms a virtual image as it is a diverging lens.
Bryce has selected a major in political science but has a little interest in understanding public relations
Hi, you've asked an incomplete question. However, I assumed you want additional comments about this scenario.
Explanation:
Note, the term Major as used in academic contexts refers to a person's preferred interest or specialization at college or university.
Hence, the statement about Bryce appears to be contradictory, since we are told he "has little interest in understanding public relations".
The shortening of a transmitted signal's wavelength and/or an increase in its frequency, which indicates that the object is
moving toward the observer, is called the
Answer: The Doppler effect occurs when a source of a wave is moving relative to an observer (or the observer is moving relative to the source). In this case, the apparent frequency of the sound, as heard/seen by the observer, is shifted with respect to the original frequency of the wave.
More specifically, the relationship between the apparent frequency, f', and the original frequency, f, is given by:
where:
is the velocity of the wave
is the velocity of the observer relative to the source, and it is positive if the observer is moving towards the source, and negative if the observer is moving away from the source
is the velocity of the source relative to the observer, and it is positive if the source is moving away from the observer, and negative if the source is moving towards the observer
The doppler effect occurs in many daily-life situations: for instance, when an ambulance approaches you, you hear an increase in the apparent frequency of the siren due to the Doppler effect. Another example is the movements of distant galaxies from us: when they move away from us, the apparent frequency of the light they emit decreases, so their wavelengths appear to increase towards the red color (red-shift); on the contrary, when they are moving towards us, the apparent frequency seems to increase, so the wavelength seems to decrease towards the blue color (blue-shift).
Explanation:
¿Qué proporción deberían guardar los platos de una prensa hidráulica para que, aplicando 40N de fuerza en el plato menor, podamos levantar un objeto de 40Kg en el plato mayor?
Answer:
El área de la placa más grande es aproximadamente 9,81 veces el tamaño del área de la placa más pequeña
Explanation:
Los parámetros dados son;
La fuerza aplicada sobre la placa más pequeña, F = 40 N
El culo del objeto levantado en la placa más grande, m = 40 kg
El peso del objeto, W = 40 kg × 9,81 m / s² = 392,4 N
Tenemos la presión en el plato pequeño = La presión en el plato más grande
Por lo tanto;
F / A₁ = W / A₂
Dónde;
A₁ = El área del plato pequeño
A₂ = El área de la placa más grande
Por lo tanto, obtenemos;
40 N / (A₁) = 392,4 N / (A₂)
A₂ / A₁ = 392,4 N / (40 N) = 9,81
∴ A₂ = A₁ × 9,81
El área de la placa más grande, A₂ = 9,81 (9,81 m / s² ≈ g) multiplicado por el área de la placa más pequeña A₁.
can we detect em waves with our eyes?
tru or false
Explanation:
TRUE
Your eyes detect electromagnetic waves that are roughly the size of a virus. Your brain interprets the various energies of visible light as different colors, ranging from red to violet. ... On the other end of the spectrum are gamma rays, with wavelengths billions of times smaller than those of visible light
A 12 kg ball is rolling with a velocity of 10 m/s. How much kinetic energy does the ball have?
Answer:
600 J
Explanation:
KE = 1/2 mv^2
If the speed of an object changes, the object must be experiencing an acceleration.
True or False
Which is not a way in which life is dependent on photosynthesis?
A.) Organisms breathe in the oxygen
B.) Its sugar is used as a food
C.) Helps cure disease
D.) Helps reduce global warming
Answer:
The answer is A
Explanation:
I have had this question before
hope this helps!! <3
The one that is not a way in which life is dependent on photosynthesis is that helping in cure of diseases. The correct option is C.
What is photosynthesis?Photosynthesis is a technique that plants as well as other lifeforms use to transform light energy into chemical energy that can then be released to fuel the organism's activities via cellular respiration.
Photosynthesis' primary function is to convert solar energy into chemical energy and then store that chemical energy for later use. This process powers the majority of the planet's living systems.
Photosynthesis is essential to all living things because it is the primary source of oxygen in the atmosphere.
Without photosynthetic activity, the carbon cycle would not have been possible, oxygen-requiring life would perish, and plants would perish.
Due to photosynthesis, the organisms breathe in the oxygen, sugar is used as a food, and also helps to lower down global warming.
Thus, the correct option is C.
For more details regarding photosynthesis, visit:
https://brainly.com/question/1388366
#SPJ2
A step down transformer has a primary coil consisting of 700 tons and a secondary coil consisting of 300 times. What is the potential difference in the second circuit, if the primary coil is supplied with an effective AC potential difference of 110 V?
Answer is 47.14 v
by the relation
[tex]\frac{V out}{V in } = \frac{N secondary}{N primary }[/tex]
Which of the following depicts xylem?
A food web is shown below. Hawk Fox Snake Mouse Frog Grasshopper Beetle Fungus Grass Which organisms could be both predators and prey depending on the relationship represented on the food web? A Hawk and fox B Grasshopper and beetle C Snake, frog, and mouse D Fungus and grass
Answer:
A
A fox and hawk can be both a predator and prey
Which statement about the minerals plagioclase feldspar, gypsum, biotite mica, and talc can best be inferred from the chart? (1) These minerals have the same
chemical and physical properties. (2) These minerals have different chemical properties, but they have similar physical properties. (3) These minerals have different physical and chemical properties, but they have identical uses. (4) The physical and chemical properties of these minerals determine how humans use them.
Answer:
(4) The physical and chemical properties of these minerals determine how humans use them.
Explanation:
All the materials and the metals found on earth shows certain characteristics naturally or in their physical state. These physical characteristics can be their look, their structure, their color, strength, melting point, boiling point, density, etc.
And chemical properties of the metals are defined as those characteristics or features of the metals that it exhibits when these metals reacts chemically.
The physical properties as well as the chemical properties distinguishes each metal from each other. These properties determines how people use these metals in their life.
If you were to throw one show with a force of 20 Newtons and the other with a force of 10 Newtons, which would accelerate more? Why?
Answer:
The show with 20 N force will accelerate more than the show with 10 N force, because 20 N force is greater than 10 N force.
Explanation:
From Newton's second law of motion, acceleration is the ratio of applied to mass of the object.
[tex]acceleration = \frac{Force}{mass}[/tex]
Acceleration is directly proportional to an applied force. At a constant mass, acceleration increases with an increase in the applied force.
Therefore, the show with 20 N force will accelerate more than the show with 10 N force, because 20 N force is greater than 10 N force.
Give reasons why christian should avoid corruption
Answer: that Christians should not withdraw from the world, but should actively participate in the ... That is perhaps the reason why there is currently such an ... Investigating the root causes and consequences of corruption may contribute to a more.
Explanation:
NO LINKS OR NON USEFUL ANSWERS!!!!!!!! What makes a screw able to hold more or less weight?
Answer:
thread
Explanation:n general, a screw can hold 80-100 pounds. Several factors can impact on the amount of weight the screw can hold. This includes the length of the screw, the type of thread, the quality of the screw, the way it was inserted, and the type of forces that will be acting on it.
Matter cant be created or destroyed
true
false
Answer: True
no matter can be created nor destroyed in any process. if something is burned, made in a compound or anything like that all matter is still the same amount from beginning to end.
Explanation:
A) write the name of any two instrument based on atmoshpheric pressure.
B)Which chemical is used to increase the setting period of cement?
C)What are the near point and far point of normal eye?
Answer:
Explanation:(a)Mercury Barometer and Aneroid Barometer
(b)Gypsum
(c)Near point of human eye is 25 cm and the far point is infinity.
Please help, I’m being timed! I will give brainliest!!!!!!!
Answer:
The Answer is gonna be A. It will speed up
Explanation :if it has the same velocity it will only change if the weight is less
This is the Answer
I hope I helped
I hope you are having a great day :3:3:3:3:3:3
Answer:
B
Explanation:
Why would it speed up if it is the same velocity??
It would stay at teh same speed. It would only increase if it weighed less.
Which beach balls have potential energy and not kinetic energy?
Answer:
Beach ball 4
Explanation:
it is because, Potential Energy = M G H
P(e) directly proportional to H.
if H increase then P energy also increases
A(n) _________ is an object that is thrown.
Answer:
projectile
Explanation:
Answer:
the answer is projectile
Explanation:
this is because like take a nerf gun for example when u fire it PROJECTS the dart from the gun. may i be marked brainliest?
1. बालू के एक कण की त्रिज्या 1.6 x 10-4मी है। इस कण की त्रिज्या
ऐंग्स्ट्रॉम में होगी
(a) 1.6x106A
तन (b) 1.5x106A
(c) 14x10A
(d)1.2x106A
Answer:
BOIIII english????
Explanation:
If the wavelength of a wave stays the same and the speed doubles, what happens to the frequency of the wave?
Explanation:
velocity = wavelength × frequency => v= f1 × λ => f1 = v/ λ
λ = stays the same
v = doubles
2v = f2 × λ
2v/λ = f2
now ,
f2/f1= 2vλ/ vλ = 2
f2 = 2f1
therefore frequency is doubled
An asteroid has a mean radius equal to 17 times that of Earth. Using Kepler's 3rd law find its period. T^2=a^3
Answer:
If T^2 = a^3
T1^2 / T2^2 = a1^3 / a2^3
Or T2^2 = T1^2 * ( a2^3 / a1^3)
Given T1 = 1 yr and a2 / a1 = 17
Then T2^2 = 1 * 17^3
or T2 = 70 yrs
A DVD spins with a period of 0.016 seconds. With what frequency is the DVD
spinning?
Answer:
It spins on the side where it looks shiny.
Explanation:
Answer:
9120-25600 RPM mate
Explanation:
I know your thinking it's crazy because of the other answer. but don't worry i looked it up for ya.
1.-Una fuerza horizontal de 40 N es apenas suficiente para poner en marcha un trineo de 600 N sobre nieve compacta. Después de empezar el movimiento se requieren tan solo 10 N para mantener el trineo a rapidez constante. Halle los coeficientes de fricción estática y cinética
Answer:
Los coeficientes de fricción estática y cinética son [tex]\frac{1}{15}[/tex] y [tex]\frac{1}{60}[/tex], respectivamente.
Explanation:
Por la Primera Ley de Newton, sabemos que la fuerza externa debe tener igual magnitud y dirección contraria a la fuerza de reacción (fricción). Puesto que el trineo se mueve sobre una superficie horizontal, la magnitud de la fuerza normal es la del peso ([tex]W[/tex]), en newtons. El coeficiente de fricción estática ([tex]\mu_{s}[/tex]), sin unidad, es la razón de la fuerza de fricción justo antes del movimiento inminente ([tex]F[/tex]), en newtons, a la fuerza normal ([tex]N[/tex]), en newtons:
[tex]\mu_{s} = \frac{F}{W}[/tex] (1)
Si sabemos que [tex]F = 40\,N[/tex] y [tex]W = 600\,N[/tex], entonces el coeficiente de fricción estática es:
[tex]\mu_{s} = \frac{F}{W}[/tex]
[tex]\mu_{s} = \frac{40\,N}{600\,N}[/tex]
[tex]\mu_{s} = \frac{1}{15}[/tex]
El coeficiente de fricción cinética ([tex]\mu_{k}[/tex]), sin unidad, es la razón de la fuerza de fricción experimentada por el trineo en movimiento ([tex]F[/tex]), en newtons, a la fuerza normal:
[tex]\mu_{k} = \frac{F}{W}[/tex] (2)
Si sabemos que [tex]F = 10\,N[/tex] y [tex]W = 600\,N[/tex], entonces el coeficiente de fricción cinética es:
[tex]\mu_{k} = \frac{F}{W}[/tex]
[tex]\mu_{k} = \frac{10\,N}{600\,N}[/tex]
[tex]\mu_{k} = \frac{1}{60}[/tex]
Los coeficientes de fricción estática y cinética son [tex]\frac{1}{15}[/tex] y [tex]\frac{1}{60}[/tex], respectivamente.