What is an object’s acceleration if it is moving at 40 m/s and comes to a stop in 5 s?


35 m/s 2

8 m/s 2

–8 m/s 2

200 m/s2

The transmission time from when a signal first leaves a satellite and then arrives at a ground station is called round-trip delay time.

The round-trip delay time is the total amount of time it takes for a signal to travel from a satellite to a ground station and back. It is an important metric used in satellite communications to determine the quality of the link between the satellite and the ground station and to correct for any transmission delays that may affect the accuracy of the data being transmitted.

The delay time is affected by several factors, including the distance between the satellite and the ground station, the altitude of the satellite, and the atmospheric conditions along the signal path.

By measuring the round-trip delay time, engineers can make necessary adjustments to the satellite and ground station equipment to ensure reliable and efficient communication.

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The sum of gravitational and elastic potential energies of the system increases as the mass is pulled down in a spring-mass system.

When the mass is pulled down in a spring-mass system, two potential energies are at play: gravitational potential energy and elastic potential energy. Gravitational potential energy depends on the height of the mass above a reference point, while elastic potential energy is related to the displacement of the spring from its equilibrium position.

As the mass is pulled down, the gravitational potential energy increases because the height decreases. Simultaneously, the elastic potential energy increases because the spring is stretched or compressed further from its equilibrium position. Therefore, the sum of gravitational and elastic potential energies of the system increases when the mass is pulled down in a spring-mass system.

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Answer:

c human have eukaryotic cell

Human beings have eukaryotic cells. So, the correct option is (C).

Eukaryotic cells are defined as having a nucleus enclosed within a nuclear membrane and make up large and complex organelles. Protozoa, fungi, plants and animals all contain eukaryotic cells which are classified under the kingdom Eukaryota.

These can maintain different environments in the same cell which allows them to carry out different metabolic reactions which helps them to be many times larger than prokaryotic cells.

Some characteristics of these cells are:

Thus, Human beings have eukaryotic cells. So, the correct option is (C).

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Explanation:

The density of silver is 10.5g/cm3

=2500.0g/10.5g/cm3

=238.09cm3

238.1cm3 to nearest tenth.

I hope my answer helps. Please mark as brainliest.

DayDreamer Travel Inc. uses customization or personalization to please its customers.

DayDreamer Travel Inc. focuses on customization or personalization to ensure customer satisfaction. By allowing customers to choose their preferred budget, destination, and activities, DayDreamer Travel tailors vacation packages specifically to individual preferences and desires. This approach enables customers to have a more personalized and tailored experience that aligns with their unique preferences and interests.

Whether it's a cruise, a beach resort, or any other type of destination wedding vacation package, DayDreamer Travel aims to create memorable and fulfilling experiences by catering to the specific desires and preferences of its customers.

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Answer:

increase in amount or extent.

Explanation:

in other words speed up or go faster in a less time period

Answer:

D. circumpolar

Explanation:

A circumpolar star is a star, as viewed from a given latitude on Earth, that never sets below the horizon due to its apparent proximity to one of the celestial poles.

-Wikipedia

Alpha and beta rays are deflected in opposite directions in a magnetic field because they have opposite charges.

Alpha particles are positively charged while beta particles are negatively charged. When they enter a magnetic field, they experience a force that is perpendicular to their direction of motion and to the direction of the magnetic field. The direction of this force depends on the charge of the particle. Since alpha and beta particles have opposite charges, they experience opposite forces and are deflected in opposite directions.

The magnitude of the force also depends on the velocity of the particle, which is why particles with different energies will be deflected differently. This property of magnetic fields is used in many applications, including in particle accelerators and in medical imaging techniques such as magnetic resonance imaging (MRI). The other options listed in the question are not correct, as the direction of the magnetic force does not depend on the spin of the particle or on the presence of nucleons.

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Answer:

It orbits our sun is the correct answer

Sagittarius A* is 26,000 light-years away from earth. Hence, option (C) is correct.

Sagittarius A* (Sgr A*), a supermassive black hole at the center of the Milky Way Galaxy with a mass equal to four million Suns, is seen in the constellation of Sagittarius. It is a powerful radio source that is a part of the larger Sagittarius A complex.

One of Chandra's largest observing missions to date led to these new discoveries. In order to obtain the first-ever X-ray photos and energy fingerprints of the multi-million degree plasma swirling around Sgr A*, a black hole with around 4 million times the mass of the Sun, Chandra made observations over the course of nearly five weeks in 2012.

Sgr A* is one of the very few black holes in the cosmos where we can really observe the flow of stuff close by, and it is only 26,000 light years away from Earth.

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The slope of the graph is acceleration of the car with a value of 3.2 m/s².

The given parameters;

The initial velocity of the car in m/s is calculated as follows;

\(60 \ \frac{km}{hr} \times \frac{1 \ hr}{3600 \ s} \times \frac{1000 \ m}{1 \ km} = 16.67 \ m/s\)

The acceleration of the car is calculated as follows;

\(a = \frac{v- u}{t} \\\\a = \frac{80 - 16.67 }{20} \\\\a = 3.2 \ m/s^2\)

The graph of the velocity against time and acceleration against time is in the image uploaded.

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Answer:

deuterium, helium and lithium

Explanation:

Big Bang nucleosynthesis is defined as the production of nuclei other than Hydrogen during the early phases of the universe but shortly after the occurrence of the Big Bang.

Now, the other nuclei formed are usually the elements deuterium, helium and lithium or their corresponding isotopes.

Answer:

0.5m

Explanation:

v=f×lamda

v is 300m/s, f is 600Hz, lamda is ?

lamda=v/f

lamda=300/600

lamda =3/6=1/2m

Answer:

5235.84 kg

Explanation:

There is one theorem - whose proof I will never remember without having to drag calculus in there - that says that the variation of momentum is equal to the force applied times the time the application last.

\(F\Delta t = m \Delta v\) As long as the engine isn't ejecting mass - at this point it's a whole new can of worm - we know the force, we know the variation in speed, time to find the mass. But first, let's convert the variation of speed in meters per second. The ship gains 250 kmh, \(\Delta v = 69.4 m/s\);

\(45 450 \cdot 8 = 69.4 m \rightarrow m = \frac{45450\cdot 8}{69.4} = 5235.84 kg\)

Moment of inertia of thin cylindrical body = MR²/2 and Rotational kinetic energy= 1/2 × moment of inertia × (angular speed)²

a) As the angular acceleration If the style starts from rest.

Angular acceleration (in rad/s²) of the style if, starting from rest, it reaches a rotation speed of 12.0 rpm in 10.7s will be

angular acceleration= angular speed / time

angular acceleration= (12×2π)÷(10.7×60)

angular acceleration= 0.117 rad/s².

b) Angle (in rad) through which the style rotates to reach its final rotational speed after 10.7 seconds will be-

angle= 1/2 × angular acceleration × time²

angle = 1/2 × 0.117 × (10.7)²

angle = 6.697 rad.

c) The rotational kinetic energy (in j) of the 3.00 g style once it reaches its final rotational speed after 10.7 seconds will be-

Rotational kinetic energy= 1/2 × moment of inertia × (angular speed)²

and Moment of inertia of the cylindrical protrusion 5.00 mm in length and 0.800 mm in diameter style = (mass × radius²) ÷ 2

(Since moment of inertia of thin cylindrical shell = MR²/2)

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Answer:

is it 20kg. Two opposing forces pushing onto each other

Answer:

32

Explanation:

The horizontal distance travelled by the football is 3.1 m.

The angle of projection of the football is calculated as follows;

tan ( θ ) = Vy / Vx

where;

tan ( θ ) = 5 / 3

tan ( θ ) = 1.667

θ = arc tan (1.667)

θ = 59⁰

The resultant velocity of the ball is calculated as follows;

v = √ (Vx² + Vy²)

v = √ (3² + 5²)

v = 5.83 m/s

The horizontal distance travelled by the football is calculated as follows;

x = v² sin(2θ) /g

where;

x = [ (5.83)² sin(2 x 59) /9.8 ]

x = 3.1 m

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Answer:

a)   τ₁ = 660 N m,  b)  τ’= 686 N m,  c)    F = 623.6 N

Explanation:

a) For this exercise let's use the concepts of torque and rotational balance.

For this we set a reference system at the base and assuming that the counterclockwise rotations are positive

where the force F = 600 N, the distance to the axis is x = 1.1 m, the mass of the system m = 70g and the weight is placed at the point of the center of  gravity x_{cm} = -1.0 m

The torque at the front is

          τ₁ = F x

          τ₁ = 600 1.1

          τ₁ = 660 N m

b) let's write the rotational equilibrium condition

           ∑ τ = 0

           τ'- W x_{cm} = 0

           τ ’= mg x_{cm}

            τ’= 70 9.8 1.0

            τ’= 686 N m

c) the greatest force Matt can apply

           τ’= F x

           F = τ’/ x

           F = 686 / 1.1

           F = 623.6 N

Answer:

Thermal heat

Explanation:

The water heats up which it means it is thermal (heat/hot)

The circuit shown has the drawback that it can only operate with alternating current.

The correct answer is D

A type of electrical current known as alternating current (AC) alternates the flow of electrons periodically or in cycles between two directions. Alternating current (AC) is the kind of current that circulates through electrical outlets used in everyday homes and power lines.

Both alternating current (AC) and direct current (DC) are types of electric current (DC). The way that electrons move determines how AC and DC are different from one another. While the flow of electrons in AC is constantly changing, moving first ahead and then backward, as opposed to DC's steady movement in one direction

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Answer: consumers' desire for more comfortable seatbelts led engineers to improve seat belts.

Explanation:

Answer:

zip zap ballz

Explanation:

The lamp descends with the elevator so its acceleration is also 2.9 m/s². Take downward to be the positive direction. Then the net force on the lamp is

∑ F = w - t = ma

where w = mg = weight of lamp, t = tension in the cord, m = mass of lamp, and a = acceleration. Then

mg - t = ma

mg - ma = t

m (g - a) = t

m = t / (g - a)

so that the lamp's mass is

m = (52 N) / (9.8 m/s² - 2.9 m/s²) ≈ 7.5 kg

Part A: The radius of curvature of the lens surface is approximately 3.17 m. Part B: The focal length of the lens is approximately 1.59 m.

Part A:

To find the radius of curvature of the lens surface, use the formula for the radius of the nth bright ring in a planoconvex lens:

r = √(n × λ × f),

where r = radius of the nth bright ring, λ = wavelength of light, and f = focal length of the lens.

In this case, n = 42 (since the last bright ring is observed at the edge), λ = 580 nm (converted to meters, so λ = 580 × 10⁻⁹ m).

Rearranging the formula, solve for f:

f = r² / (n × λ).

Plugging in the values:

f = (0.021 m²) / (42 × 580 × 10⁻⁹ m).

Calculating this expression gives:

f = 3.17 m.

Therefore, the radius of curvature of the lens surface is approximately 3.17 m.

Part B:

The focal length of the lens can be determined using the formula:

f = R / 2,

where R = radius of curvature.

Plugging in the value for the radius of curvature obtained in Part A:

f = 3.17 m / 2.

Calculating this expression gives:

f = 1.59 m.

Therefore, the focal length of the lens is approximately 1.59 m.

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Answer:

Explanation:

given :-

force applied = 117.6N

Area = 20 m^2

Pressure =?

solution:-

Pressure = Force / Area

= 117.6 N / 20 m^2

= 5.88 Pascals

Hope it helps :D!

Explanation:

Cells can be observed under a brightfield microscope as translucent objects against a vivid background.

Objects that are translucent allow some light to pass through them. Translucent materials include certain polymers and frosted glass. Only a portion of the light that strikes transparent materials goes through. It takes the materials some time for the light to flow through them. Waxed paper, thin plastic sheets, butter paper, and vegetable oil are a few examples of translucent materials. This mnemonic should help you remember when to use transparent because transparent objects are clear and light may readily pass through them. The thing would be translucent if light still enters it, but it is less noticeable. An opaque object is one through which no light can flow.

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Answer:

2.3 m/s2

Explanation:

F = ma

a = F/m

a = 10.8 / 4.6

a = 2.3 m/s2

I hope this helps.