help please physics !!

Answer:

i would say the third one

Explanation:

may i be brainliest?

Answer:

mark me as the brainly plss

Answer:

2 314.28571 kg / m

Explanation:

divide

and you see

Answer: suppressed; chemotherapy

Explanation:

Chemotherapy is typically a drug treatment whereby powerful chemicals are used to kill the fast growing cells in ones body. Chemotherapy is usually used in the treatments of cancer.

Research revealed that patients who received chemotherapy in a hospital setting subsequently experienced

a (suppressed) immune response when they again visited the hospital. In this example, the (chemotherapy) would be classified as the US.

this is my answer sure po ako n tama iyan

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:

Answer:

[tex]v'_2=3V[/tex]

Explanation:

From the question we are told that:

Bowling ball Speed [tex]v_1=5 m/s[/tex]

Beach ball Speed [tex]v_2=2 m/s[/tex]

Let The Mass be equal i.e

 [tex]M_1=M_2[/tex]

Therefore

Generally the equation for Velocity of beach ball after collision [tex]v'_2[/tex] is mathematically given by

Since Velocity is Vector Quantity

Therefore

 [tex]v'_2=v_1-v_2[/tex]

 [tex]v'_2=5-2[/tex]

 [tex]v'_2=3V[/tex]

Answer:

heat and power

Explanation:

is the simultaneous production of electricity and heat both of which are used

Answer:

0.175g

Explanation:

A = A02^-(t/hl)

= (5.6g)2^-(750/150)

= 0.175g

I am not sure of this, but it is either the third option or the last option.

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

Answer:

(This will depend on the type of fuel, I will assume that the fuel is petrol)

First, let's find the expected energy consumption in the US for the next 10 years.

We know that in one year, a person consumes 3.5*10^11 joules.

There are 310,000,00 people on the US

Then the total consumption in one year is:

310,000,000*3.5*10^11 joules = 1.085*10^20 J

In 10 years the consumption is 10 times the consumption of a single year, then the expected energy consumption in the US for the next 10 years is:

10*1.085*10^20 J = 1.085*10^21 J

Now let's find the mass of fuel required.

We know that a liter of petrol has 31,536,000 joules of energy,

And a liter of petrol weights 0.75 kg

To find the number of liters of petrol that we need, we need to find the quotient between the expected energy consumption in the next 10 years and the energy of a single liter of petrol, this is:

N = (1.085*10^20 J)/(31,536,000 j) = 3.44*10^13

We will need  3.44*10^13 liters of petrol.

And the total mass of petrol will be:

M = 3.44*10^13*0.75 kg = 2.58*10^13 kg of fuel.

Answer:

how tightly strung the wire is

-- Make the string tighter or looser.

-- Keep the same length, but make the string thicker or thinner.

-- Touch the string at a point exactly 1/2, 1/3, 1/4, or 1/5 of its length from one end.

Answer:

Humans survive through gaining nutrients by eating

Answer:

We must have food, water, air, and shelter to survive. If any one of these basic needs is not met, then humans cannot survive.  Oxygen is one of the most essential human needs. Our bodies need a consistent supply of it to function properly. Without access to oxygen, you can experience a condition known as cerebral hypoxia, which affects the brain. As little as five minutes without air can result in brain damage. We get food from plants and animals, we get water from rivers and streams, and we get shelter from building anything that is around.

Explanation:

Answer:the process by which businesses or other organizations develop international influence or start operating on an international scale.

Explanation:

Answer:

The Magnitude of the angle of reflection equals that of Incidence from the Law of reflection

So its 50°.

Explanation:

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

Answer:

El neumático soportará una presión de 1.7 atm.

Explanation:

Podemos encontrar la presión final del neumático usando la ecuación del gas ideal:

[tex] PV = nRT [/tex]

En donde:

P: es la presión

V: es el volumen

n: es el número de moles del gas

R: es la constante de gases ideales

T: es la temperatura

Cuando el neumático soporta la presión inicial tenemos:

P₁ = 1.5 atm

T₁ = 300 K

[tex] V_{1} = \frac{nRT_{1}}{P_{1}} [/tex]  (1)  

La presión cuando T = 67 °C es:

[tex] P_{2} = \frac{nRT_{2}}{V_{2}} [/tex]   (2)

Dado que V₁ = V₂  (el volumen del neumático no cambia), al introducir la ecuación (1) en la ecuación (2) podemos encontrar la presión final:

[tex] P_{2} = \frac{nRT_{2}}{V_{2}} = \frac{nRT_{2}}{\frac{nRT_{1}}{P_{1}}} = \frac{P_{1}T_{2}}{T_{1}} = \frac{1.5 atm*(67 + 273)K}{300 K} = 1.7 atm [/tex]  

Por lo tanto, si en el transcurso de un viaje las ruedas alcanzan una temperatura de 67 ºC, el neumático soportará una presión de 1.7 atm.

Espero que te sea de utilidad!

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.

Answer:

Explanation:

Quantum mechanics tells us that light can behave simultaneously as a particle or a wave. However, there has never been an experiment able to capture both natures of light at the same time; the closest we have come is seeing either wave or particle, but always at different times.When UV light hits a metal surface, it causes an emission of electrons. Albert Einstein explained this "photoelectric" effect by proposing that light – thought to only be a wave – is also a stream of particles

Why is light considered a wave and a particle?

Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. They also found that increasing the intensity of light increased the number of electrons ejected, but not their speed

Answer:

400N

Explanation:

F= ma

F= 100 x 4

F= 400N

Answer:

Explanation:

potential energy=mass*height*gravity

=10*10*9.8

=100*9.8

980 joule

Answer:

Hey!

_________________

Voltage (V) = 0.8V

Current (I) = 200 mA = 200/10^3 = 2/10

Resistance = ?

Resistance = Voltage / Current

Voltage = Current × Resistance

0.8 = 2/10 × Resistance

0.8×10/2 = Resistance

8/2 = Resistance

Resistance = 4 ohm

_________________

Hope it helps...!!!

Explanation:

Respuesta:

a) 12.3 m/s²

b) 153.75 m

c) 36.9 m/s

Explicación:

Paso 1: Información provista

Paso 2: Calcular la aceleración (a) del cochecito

Usaremos la segunda ley del movimiento de Newton.

F = m × a

a = F/m = 8 N / 0.650 kg = 12.3 m/s²

Paso 3: Calcular el espacio recorrido (x) en 5 segundos (t).

Usaremos la siguiente fórmula cinemática para un movimiento rectilineo uniformemente acelerado.

x = 1/2 × a × t²

x = 1/2 × 12.3 m/s² × (5s)² = 153.75 m

Paso 4: Calcular la velocidad (v) a los 3 segundos si parte del reposo

Usaremos la siguiente fórmula cinemática para un movimiento rectilineo uniformemente acelerado.

v = a × t

v = 12.3 m/s² × 3 s = 36.9 m/s

Los cálculos dados serían los siguientes:

a). Aceleración = 12,3 m / s ^ 2

B). Distancia recorrida en 5 segundos = 153,75 m

C). Velocidad en 3 segundos = 36,9 m / s

Dado que,

Fuerza aplicada = 8N

Peso de la silla de paseo en gramos = 650g

a). To find the aceleración,

[tex]F = m[/tex] × [tex]a[/tex]

[tex]a = F/m[/tex]

[tex]= 8 N/0.650 kg[/tex]

[tex]= 12.3 m/s^2[/tex]

Now,

b). :-espacio recorrido en 5 segundos y

Using the Kinematic formula:

[tex]x = 1/2[/tex] × [tex]a[/tex] × [tex]t^2[/tex]

[tex]x = 1/2[/tex] × [tex]12.3 m/s^2[/tex] × [tex](5s)^2[/tex]

= 153.75 m

c). Using the same formula,

velocidad a los 3 segundos si parte

[tex]v = a[/tex] × [tex]t[/tex]

[tex]v = 12.3 m/s^2[/tex] × [tex]3 s[/tex]

= 36.9 m/s

Learn more about "Acceleration" here:

brainly.com/question/3046924