A driver in a car traveling at a speed of 78 kilometers/h sees a cat 101 m away on the road . How long will it take for the car to accelerate uniformly to a stop in exactly 99 m?

Answer:

I Believe the answer is

[tex]D. \: \: atmosphere[/tex]

Explanation:

I hope how this helps!

Answer:

C

Explanation:

During respiration, oxygen diffuses into the lung (carbon dioxide diffuses out), gets into the blood, and is transported around the body. The hemoglobin of the blood distributes the oxygen to the various cells and carbon dioxide from these cells diffuses into the blood. The blood travels back to the lung where the carbon dioxide is exchanged for oxygen once again. The carbon dioxide is eventually exhaled out of the nose.

The correct option is C.

Answer:

The 60 kg skater is traveling at 2.63 m/s in the opposite direction from the 45 kg skater.

Explanation:

The velocity of the 60 kg skater can be found by conservation of linear momentum:

[tex]P_{i} = P_{f}[/tex]

[tex]m_{a}v_{i_{a}} + m_{b}v_{i_{b}} = m_{a}v_{f_{a}} + m_{b}v_{f_{b}}[/tex]  (1)

Where:

[tex]m_{a}[/tex]: is the mass of the first skater = 45 kg        

[tex]m_{b}[/tex]: is the mass of the second skater = 60 kg        

[tex]v_{i_{a}}[/tex]: is the initial speed of the first skater = 0 (he is standing still)

[tex]v_{i_{b}}[/tex]: is the initial speed of the second skater = 0 (he is standing still)

[tex]v_{f_{a}}[/tex]: is the final speed of the first skater = 3.5 m/s

[tex]v_{f_{b}}[/tex]: is the final speed of the second skater =?

By replacing the above values into equation (1) and solving for [tex]v_{f_{b}}[/tex] we have:

[tex]0 = m_{a}v_{f_{a}} + m_{b}v_{f_{b}}[/tex]

[tex]v_{f_{b}} = \frac{-m_{a}v_{f_{a}}}{m_{b}} = \frac{-45 kg*3.5 m/s}{60 kg} = -2.63 m/s[/tex]

The minus sign is because the 60 kg skater is moving in the opposite direction from the other skater.

Therefore, the 60 kg skater is traveling at 2.63 m/s in the opposite direction from the 45 kg skater.

I hope it helps you!

Answer:

El valor de la fuerza entre ambas cargas es 168,750,000 N.

Ambas cargas son positivas, por lo que entre ellas existirá una fuerza de repulsión.

Explanation:

Los responsables de todos los fenómenos eléctricos son los electrones, porque pueden escapar de la órbita del átomo y son mucho más ligeros que las otras partículas.

La carga eléctrica es una propiedad física propia de algunas partículas subatómicas que se manifiesta mediante fuerzas de atracción y repulsión entre ellas. La materia cargada eléctricamente es influida por los campos electromagnéticos, siendo a su vez, generadora de ellos.

Entre dos o más cargas aparece una fuerza denominada fuerza eléctrica cuyo módulo depende del valor de las cargas y de la distancia que las separa, mientras que su signo depende del signo de cada carga.

La fuerza entre dos cargas se calcula como:

[tex]F=k*\frac{Q*q}{d^{2} }[/tex]

donde:

Siendo 1 millicoulomb [mC] = 0,001 coulomb [C] y 100 cm= 1 m, en este caso sabes:

Reemplazando:

[tex]F=9*10^{9}\frac{N*m^{2} }{C^{2} } *\frac{0.005C*0.006C}{(0.04m)^{2} }[/tex]

F= 168,750,000 N

El valor de la fuerza entre ambas cargas es 168,750,000 N.

Las cargas del mismo signo se repelen, mientras que las cargas con diferente signo se atraen. En este caso ambas cargas son positivas, por lo que entre ellas existirá una fuerza de repulsión.

Answer: C. The time taken for the light to travel would have been too little to have been  measured by them.

Explanation:

Light travels at a speed of 300,000 km per second which is much too fast for the naked eye to even comprehend. This is why light shinning in a distance is picked up instantaneously by out eyes.

This experiment done by Galileo would therefore be unable to measure the speed of light because the light from either lantern would have traveled too fast for Galileo to be able to measure the time taken.

Answer:

D. shortest wavelength

Explanation:

Photons with the highest energy have the shortest wavelength. The shorter the wavelength, the higher the energy of a photon.

A photon is a quantity that transmits electromagnetic energy from one place to the other.

Energy, wavelength and frequency of a photon are connected using the expression:

    E =  h f  = [tex]\frac{hc}{wavelength}[/tex]  

E is the energy

h is the Planck's constant

 f is the frequency.

Answer:

true

Explanation:

PLS MAKE ME AS BRAINLIST

Answer:

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Answer: Image result for What is produced in the nucleolus?

The nucleolus is a region found within the cell nucleus that is concerned with producing and assembling the cell's ribosomes. Following assembly, ribosomes are transported to the cell cytoplasm where they serve as the sites for protein synthesis.

Explanation: hope this helps! PLs mark me as brainliest! Thank you and have a wonderful day/night!

Answer:

Seatbelts

Explanation:

Resistance to change in motion. it presses tour body outside of the loop, keeping you inside the cart

Answer:

Mass wasting

Explanation:

Took the test

Answer:

Mass wasting

Explanation:

because

A magnetic field forms around the wire. and The field is perpendicular to the direction of flow of the current.

A magnetic field is a visual representation of how the magnetic force is distributed around and inside of magnetic objects.

Most people are at least somewhat familiar with common magnetic items and are aware that there may be forces at work between them.

We are aware that magnets have two poles and that the attraction or repulsion between two magnets depends on how they are oriented (similar poles). We are aware that this occurs in a certain area that surrounds a magnet.

Therefore, A magnetic field forms around the wire. and The field is perpendicular to the direction of flow of the current.

To learn more about magnetic field, refer to the link:

https://brainly.com/question/15719243

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Answer:

Explanation:El ejercicio vigoroso previene en mayor medida el síndrome metabólico (un conjunto de enfermedades que aumentan el riesgo cardiovascular         )

mientras que una reacción vigorosa se   produce entre el aluminio y el gas cloro. Como consecuencia de la gran cantidad de energía liberada se producen luz y calor

Answer:

Explanation:

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Answer:

Facilitated diffusion and active transport both utilize proteins to transport substances across membranes. Differences between active transport and facilitated diffusion 1. Active transport requires an input of energy, usually ATP, while facilitated transport does not.

Answer:

Flakes of brick: Athens, Ohio

Cracks in rocks: Sandston, Mudcracks

Lichen growing on rocks: Antarctica living below the surface

Roots or plant growth making cracks in concrete: In the driveway, sidewalk, or road.

Answer:

It would move in a line tangent to the circular path

Explanation:

Answer:

Explanation:idk

Answer:

The distance the plane covered while it was accelerating is 80,633.3 m

Explanation:

Given;

initial velocity of the plane, u = 90 m/s

acceleration of the plane, a = 1.5 m/s²

final velocity of the plane, v = 500 m/s

The distance covered by the plane is given as;

v² = u² + 2ad

where;

d is the distance covered by the plane;

500² = 90² + 2(1.5)d

500²  - 90² = 3d

241900 = 3d

d = 241900 / 3

d = 80,633.3 m

Therefore, the distance the plane covered while it was accelerating is 80,633.3 m

Answer:

Work done = 4 J

Final Kinetic Energy = 4 J

Explanation:

From the question,

Work done = force × distance

W = F×d................... Equation 1

Given: F = 4.0 N, d = 1.0 meter.

Substitute these values into equation 1

W = 4×1

W = 4 Joules.

Also,

Kenetic Energy = 1/2 × mass × velocity×velocity.

K.E = 1/2(mv²)........... (2).

But,

F = ma

Where F = 4 N, m = 1 kg.

a = 4/1 = 4 m/s².

Using,

v² = u² + 2as............. Equation 3

Where u = 0 m/s, a = 4 m/s², s = 1 m.

Substitute into equation 3

v² = 0² +2×4×1

v² = 8

v = √8 m/s.

Substitutting into equation 2

K.E = 1/2(1)(√8)²

K.E = 1/2(8)

K.E = 4 J.

Hence the work done and the Final Kinetic energy are thesame = 4 J

The work done by the Pete is 4.0 J. And its final velocity and kinetic energy are 2.82 m/s and 3.97 J respectively.

Given data:

The force applied by the Pete Zaria is, F = 4.0 N.

The mass of mud is, m = 1.0 kg.

The distance of the countertop is, s = 1.0 m.

The work by the Pete on the mug is equal to the product of applied force and the distance covered by the mug along the rooftop. Therefore,

W = F × s

W = 4.0 × 1.0

W = 4.0 J

Now, apply the third kinematic equation of motion to obtain the final velocity of the mug as,

[tex]v^{2} = u^{2}+2as[/tex]

Here, a is the magnitude of acceleration and its value is,

F = ma

4.0 = (1.0)a

a = 4.0 m/s²

Now,

[tex]v=\sqrt{0^{2}+(2 \times 4 \times 1)}\\\\v = 2.82 \;\rm m/s[/tex]

Now. the kinetic energy of the mug is calculated as,

[tex]KE = \dfrac{1}{2}mv^{2}\\\\KE = \dfrac{1}{2} \times 1.0 \times 2.82^{2}\\\\KE = 3.97 \;\rm J[/tex]

Thus, we can conclude that the work done by the Pete is 4.0 J. And its final velocity and kinetic energy are 2.82 m/s and 3.97 J respectively.

Learn more about the kinetic energy here:

https://brainly.com/question/17858145

Answer:

The steps are:-

Explanation:

R = V / I = 100V / 20A = 5 ohms.

Answer:

Fr = 150 [N]

a = 5 [m/s²]

Explanation:

In order to find the resulting force, we must assume that the thrust force is positive to the right, while the friction force is negative to the left.

[tex]F_{r}=200-50\\F_{r}=150[N][/tex]

Now Newton's Second Law tells us that the sum of the forces or the resulting force is equal to the product of mass by acceleration.

F = m*a

[tex]150 = 30*a\\a=150/30\\a = 5 [m/s^{2} ][/tex]

Answer:

a = 0.1 [m/s²]

Explanation:

To solve this problem we must use the following equation of kinematics.

[tex]v_{f}=v_{o}+a*t[/tex]

Vf = final velocity = 0.8 [m/s]

Vo = initial velocity = 0.3 [m/s]

a = acceleration [m/s²]

t =  time = 5 [s]

[tex]0.8=0.3+a*t\\0.5 = 5*a\\a = 0.1 [m/s^{2}][/tex]

Answer:

Its speed will be 280 m/s

Explanation:

Constant Acceleration Motion

It's a type of motion in which the speed of an object changes by an equal amount in every equal period of time.

If a is the constant acceleration, vo the initial speed, vf the final speed, and t the time, vf can be calculated as:

[tex]v_f=v_o+at[/tex]

The object accelerates from rest (vo=0) at a constant acceleration of [tex]a=8\ m/s^2[/tex]. The final speed at t=35 seconds is:

[tex]v_f=0+8*35[/tex]

[tex]v_f=280\ m/s[/tex]

Its speed will be 280 m/s

Answer:

Explanation: local unit of mass is kilogram

Answer: Wavelength is the measure of the length of a complete wave cycle. The velocity of a wave is the distance traveled by a point on the wave. In general, for any wave the relation between Velocity and Wavelength is proportionate. It is expressed through the wave velocity formula.

Explanation: For any given wave, the product of wavelength and frequency gives the velocity. It is mathematically given by wave velocity formula written as-

V=f×λ

Where,

V is the velocity of the wave measure using m/s.

f is the frequency of the wave measured using Hz.

λ is the wavelength of the wave measured using m. Velocity and Wavelength Relation

Amplitude, Frequency, wavelength, and velocity are the characteristic of a wave. For a constant frequency, the wavelength is directly proportional to velocity.

Given by:

V∝λ

Example:

For a constant frequency, If the wavelength is doubled. The velocity of the wave will also double.

For a constant frequency, If the wavelength is made four times. The velocity of the wave will also be increased by four times.

Hope you understood the relation between wavelength and velocity of a wave. I truely hope this helps you out tho! Goodluck!