How far can a person run in 15 seconds if she runs at an average speed of 160 cm/s? State your answer in meters.

Among irregular galaxies, the large and small magellanic cloud are useful for astronomers to study because they are very close to us.

The Milky Way's satellite galaxies are the Large and Small Magellanic Clouds. They are large, misty blobs of light that stand out against the night sky as some of the nearest galaxies to our home galaxy.

According to estimates, there are about 3 billion stars in the Small Magellanic Cloud and 30 billion stars in the Large Magellanic Cloud.

The Large and Small Clouds are thought to have originated between 12 and 13 billion years ago, at around the same time as our Milky Way.

Great galactic tides may have shaped them irregularly due to their repeated interactions with the larger Milky Way galaxy.

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Answer:

Tt can be calculated by copy

Yes

Explanation:

Objects have the same velocity only if they are moving the same speed and in the same direction. objects moving at different speeds, in different directions or both have different velocities

Answer:

yes

Explanation:

speed and velocity are the same thing, except that velocity includes a direction.

ex.

if two things are traveling at 3mi/h, then thats the same speed. but if one is going north and the other south, then those are two different velocities

The work done by the drag force from the air is negative

When a skydiver descends towards the earth with a parachute open, there are two main forces acting on the skydiver: the gravitational force pulling the skydiver towards the earth and the drag force from the air resistance acting in the opposite direction to the motion. The drag force is proportional to the velocity of the skydiver and is directed opposite to the velocity vector. As the skydiver descends, the velocity decreases, and so does the magnitude of the drag force.

The work done by a force is defined as the product of the force and the displacement of the object in the direction of the force. In the case of the drag force acting on the skydiver, the direction of the force is opposite to the direction of the displacement.

In other words, as the skydiver descends, the drag force from the air resistance does negative work on the skydiver, which means that it reduces the kinetic energy of the skydiver. This is why a skydiver gradually slows down as they approach the ground, even with an open parachute.Therefore, the work done by the drag force is negative.

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A device that sends out sound waves to detect objects is called sonar device.

What are sound waves?

Sound waves are vibrations of air molecules that propagate through a medium, such as air, water, or solid materials. Sound waves are created when a force, such as a vibrating object, causes particles in the medium to vibrate. The vibrations cause the particles to move in an alternating pattern, creating a wave. The frequency of the wave determines the pitch of the sound. The amplitude of the wave determines the loudness.

Sonar stands for Sound Navigation and Ranging. It is a device that sends out sound waves and measures their echo off objects in the environment to detect their position, size, shape, and other characteristics. Sonar is used for a variety of applications, such as navigation, tracking objects, and detecting underwater obstacles.

Therefore, sonar device is the correct answer.

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Answer:

Newtons law of equal and opposite reactions

Explanation:

This is my best guess I'm sorry if it's not helpful

The various physical and electronic media through which we express messages are called media.

The various physical and electronic media through which we express messages are called media. Media refers to the different forms and platforms used to transmit and communicate information, including print media, broadcast media, digital media, social media, and more. These media channels serve as the means by which messages are conveyed to a target audience or recipients.

The choice of media depends on various factors such as the nature of the message, the intended audience, the desired reach and impact, and the available technological tools. Effective communication often involves selecting the appropriate media that aligns with the message and the intended communication goals.

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Yes, that is true. A.B= A1B1+A2B2+A3B3 can be proven using the dot product rule for vectors.

According to the dot product rule, the dot product of two vectors A and B is given by A.B= |A||B|cos(θ), where θ is the angle between A and B. Since A and B are two perpendicular vectors, the angle between them is 90 degrees and therefore,

cos (90) = 0. Hence, A.B= 0. However, since A= A1i + A2j + A3k and B= B1i + B2j + B3k, we can see that A1B1 + A2B2 + A3B3 ≠ 0. Therefore, A.B= A1B1 + A2B2 + A3B3.

The dot product of two vectors A and B can be calculated by multiplying their corresponding components and then adding the results.

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Answer:

42.11 years old

Explanation:

Given that:

In 2000, a 20-year-old astronaut left Earth to explore the galaxy; her spaceship travels at 2.5 x 10^8 m/s. She returns in 2040

To find her age we use:

\(\Delta t_m=\frac{\Delta t_s}{\sqrt{1-\frac{v^2}{c^2} } }\\\)

Δtm is  time interval for the observer stationary relative to the sequence of

events = 2040 - 2000 = 40 years

Δts is is the time interval for an observer moving with a speed v relative to the  sequence of event

v = velocity = 2.5 x 10^8 m/s

c = speed of light = 3 x 10^8 m/s

\(\Delta t_s=\Delta t_m}{\sqrt{1-\frac{v^2}{c^2} } }\\\Delta t_s=40\sqrt{1-\frac{(2.5*10^8)^2}{(3*10^8)^2}}\\\Delta t_s=22.11\ yr\)

Here age in 2000 is 20 year, therefore when she appear she would be 20 year + 22.11 year = 42.11 years old

Answer: 8.6m/s

Explanation:From KE=1/2mv^2

In order to make v the subject of the formula we divide both sides by 1/2m. Thus V^2 will be left alone on the RHS. But we are looking for v and not v^2. Thus we find the square root of KE1/2m

Meaning V= sqrt[3000÷1/2 of 80]

=sqrt[3000÷40]

=sqrt(75)

=8.6m/s

Answer:

11

Explanation:

the O at the end stands for oxygen and after that theres the number 11. that tells u how many oxygen atoms there are PLEASE AMRK BRAINLIEST ;C

The given statement "cold weather can increase tire pressure, so you should always deflate them a bit before driving. " is False.

In general, cold weather can cause the air inside tires to contract, which can result in a decrease in tire pressure. However, in some cases, cold weather can actually increase tire pressure. This is because the air inside the tires becomes denser in colder temperatures, and denser air can result in an increase in tire pressure.

It's important to note that tire pressure is critical for safe driving. Underinflated tires can affect handling and increase the risk of a blowout, while overinflated tires can reduce traction and increase the risk of hydroplaning. Therefore, it's essential to check tire pressure regularly and adjust it as needed, regardless of the weather conditions.

If you're unsure whether the cold weather has caused an increase or decrease in tire pressure, the best course of action is to check the tire pressure with a gauge and adjust it as needed based on the manufacturer's recommended pressure for your vehicle. Deflating the tires without first checking the pressure can lead to underinflation, which can be just as dangerous as overinflation.

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3 qe charge is contained in 1 nm of DNA. DNA is negatively charged, therefore, when an electric current is applied to the gel, DNA will migrate towards the positively charged electrode.

Deoxyribonucleic acid, or DNA, is a hereditary substance that may be found in all living things, including plants, animals, birds, mammals, and humans, as well as in unicellular amoebas.

Both prokaryotic and eukaryotic cells include the chemical substance DNA, also known as deoxyribonucleic acid, which has a special molecular structure. Nucleotide molecules make up these hereditary components.

A Swiss biologist named Johannes Friedrich Miescher first recognised and discovered DNA in 1869 while studying white blood cells.

James Watson and Francis Crick later revealed that DNA molecules have a double helix structure, which further demonstrated that DNA molecules are primarily responsible for gathering and retaining genetic information in all living species.

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A G star with a brightness of 100 L Sun is classified as Figure 19.15 lum inosity Classes. Its surface area must be 100 times greater since it emits 100 times more energy while maintaining the same temperature.

Even more bright than the massive stars are the stars of group C. These are the largest stars, or supergiants, with the highest luminosities. If a red supergiant like Betelgeuse took the place of the Sun in our solar system, it would be larger than Jupiter's orbit.

A main-sequence (core hydrogen-burning) star with the spectral type O and luminosity class V is referred to as an O-type main-sequence star (O V). The mass of these stars ranges from 15 to 90 times that of the Sun, and their surface temperatures range from 30,000 to 50,000 K. They have a brightness that ranges from 40,000 to 1,000,000 times that of the Sun.

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(a) The magnetic force experienced by the wire when it perpendicular is 0.01 N.

(b) The magnetic force experienced by the wire when the angle is  30⁰ is 5 x 10⁻³ N.

(c) The magnetic force experienced by the wire when it parallel is 0 N.

The magnetic force experienced by the wire is calculated by applying the following;

F = BIL x sin(θ)

where;

When the angle of inclination is perpendicular,  

F = 1 x 10⁻² x 10 x 0.1 x sin(90)

F = 0.01 N

When the angle of inclination is 30⁰,

F = BIL x sin(θ)

F = 1 x 10⁻² x 10 x 0.1 x sin(30)

F = 5 x 10⁻³ N

When the wire is parallel, the angle is 0⁰,

F = BIL x sin(θ)

F = 1 x 10⁻² x 10 x 0.1 x sin(0)

F = 0 N

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Answer:

wind turbines,photovoltaic cells,concentrated solar power, ocean wave power

Answer:

i guess if the a glass gets to cold it will bust

Explanation:

The forces fa is 15 and fs is 23.

In material science, a power is an impact that can change the movement of an item. A power can make an item with mass change its speed (for example moving from a condition of rest), i.e., to speed up. Power can likewise be depicted instinctively as a push or a force. A power has both size and heading, making it a vector amount. It is estimated in the SI unit of newton (N). Force is addressed by the image F (previously P).A force is a vector amount. As scholarly in a prior unit, a vector amount is an amount that has both greatness and heading. To completely depict the power following up on an item, you should portray both the extent (size or mathematical worth) and the heading. In this way, 10 Newton is definitely not a full portrayal of the power following up on an item.

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Answer:

1) Motion of air mass moving from equator northward (closer to earth axis)

2) Motion of object in orbit

3) Collision of 2 objects

4) Skater changing rotation by extension of arms

5) Motion of rocket due to velocity of expelled gas

Answer: Most aerobic and strength training programs cause your muscles to contract and tighten. So stretching after you exercise helps optimize the range of motion about your joints and boosts circulation.

Hope this helps!

To determine the physical quantities and units represented by a, b, and d, we need additional information about the specific context in which the equation is being used.

The equation you provided, v = √ab + bt + d + t, is a mathematical expression that relates the velocity, v, of a particle to time, t.

However, without additional information, it is not possible to determine the physical quantities represented by the variables a, b, and d, or their corresponding units.

Typically, in physics, the variables in a equation represent specific physical quantities, and the units associated with these variables help us understand the nature of the physical system being described.

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In conclusion, we have converted the measurements from kilometers to meters, centimeters to hectometers, millimeters to dekameters, and dekameters to decimeters. We have also solved addition, subtraction, multiplication, and division problems involving the given measurements.

To convert the given measurements, we will use the metric system conversion factors. Here are the conversions:
a. 90 kilometers to meters:
1 kilometer = 1000 meters
Therefore, 90 kilometers = 90 * 1000 = 90,000 meters.
b. 250 centimeters to hectometers:
1 centimeter = 0.01 meter
1 hectometer = 100 meters
First, convert centimeters to meters: 250 centimeters * 0.01 = 2.5 meters.
Then, convert meters to hectometers: 2.5 meters / 100 = 0.025 hectometers.
c. 3,500 millimeters to dekameters:
1 millimeter = 0.001 meter
1 dekameter = 10 meters
First, convert millimeters to meters: 3,500 millimeters * 0.001 = 3.5 meters.
Then, convert meters to dekameters: 3.5 meters / 10 = 0.35 dekameters.
d. 10 dekameters to decimeters:
1 dekameter = 10 meters
1 decimeter = 0.1 meter
Convert dekameters to meters: 10 dekameters * 10 = 100 meters.
Then, convert meters to decimeters: 100 meters / 0.1 = 1000 decimeters.
Now, let's solve the addition and subtraction problems:
3 km 9 hm 9 dam 19 m + 7 km 2 dam:
Grouping like terms, we have:
(3 km + 7 km) + (9 hm + 2 dam) + 9 dam + 19 m
= 10 km + 11 hm + 9 dam + 19 m
= 10 km 11 hm 9 dam 19 m
5 sq km 95 ha 8,994 sq m - 11 sq km 11 ha 9,010 sq m:
Grouping like terms, we have:
(5 sq km - 11 sq km) + (95 ha - 11 ha) + (8,994 sq m - 9,010 sq m)
= -6 sq km + 84 ha - 16 sq m
= -6 sq km 84 ha - 16 sq m
44 m - 5 dm:
Convert decimeters to meters: 5 dm * 0.1 = 0.5 m
Subtract: 44 m - 0.5 m = 43.5 m
72 km 47 hm 2 dam - 11 km 55 hm:
Grouping like terms, we have:
(72 km - 11 km) + (47 hm - 55 hm) + 2 dam
= 61 km - 8 hm 2 dam
Now, let's solve the multiplication and division problem:
a. 3 km 5 hm × 15:
Grouping like terms, we have:
(3 km × 15) + (5 hm × 15)
= 45 km + 75 hm
= 45 km 75 hm
In conclusion, we have converted the measurements from kilometers to meters, centimeters to hectometers, millimeters to dekameters, and dekameters to decimeters. We have also solved addition, subtraction, multiplication, and division problems involving the given measurements.

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Answer:

v = 27 m/s

Explanation:

To find the speed of cars after the collision  you take into account the momentum conservation law. Total momentum of both cars before the collision must be equal to the total momentum of both cars after the collision.

After the collision both cars traveled together, then you have:

\(m_1v_1+m_2v_2=(m_1+m_2)v\)   (1)

m1: mass of the Toyota = 3-ton = 3000 kg

m2: mass of the taxi = 2-ton = 2000kg

v1: speed of the Toyota before the collision = 45m/s

v2: speed of the car before the collision = 0 m/s (it is  at rest)

v: speed of both cars after the collision = ?

You solve the equation (1) for v:

\(v=\frac{m_1v_1+m_2v_2}{m_1+m_2}\)

Next, you replace the values of the rest of the variables:

\(v=\frac{(3000kg)(45m/s)+0kgm/s}{3000kg+2000kg}=27\frac{m}{s}\)

hence, just after the collision both cars have a speed of 27m/s

Answer:

\(\Delta L = 300\,m\)

Explanation:

La longitud del tren se deriva de la siguiente fórmula (The length of the train is derived from the following formula):

\(\Delta L + 200\,m = v\cdot \Delta t\)

\(\Delta L = \left(36\,\frac{km}{h} \right)\cdot \left(1000\,\frac{m}{km} \right)\cdot \left(\frac{1}{3600}\,\frac{h}{s} \right)\cdot (50\,s) - 200\,m\)

La longitud del tren es (The length of the train is):

\(\Delta L = 300\,m\)

Answer:

75.8

Explanation:

because just divide 1.27 into 0.75 and there's your answer

(1) The angular velocity at position 1 of a uniform rod rotating freely around an axis can be determined.

(2) The velocity of the center of mass at position 2.

(1) To determine the angular velocity at position 1, we need to consider the conservation of angular momentum. Since the rod is rotating freely, there are no external torques acting on it.

The initial angular momentum is zero, and at position 1, the angular momentum is given by L = Iω, where I is the moment of inertia of the rod and ω is the angular velocity. By substituting the values of mass and length of the rod into the formula for moment of inertia, we can solve for ω.

(2) To calculate the velocity of the center of mass at position 2, relative to position 1 and at an angle theta, we can use the concept of angular velocity and linear velocity. The linear velocity of the center of mass is given by v = ωr, where ω is the angular velocity and r is the distance between the center of mass and the axis of rotation. By considering the given angle theta and the length of the rod, we can determine the distance r.

Substituting the value of ω calculated in part (1) into the formula, we can find the velocity of the center of mass at position 2, relative to position 1 and at angle theta.

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