If a man walks 600 meters in 300 seconds, what was his speed in meters per second?​

The speed of 5 kg ball is 10.2 m/s

Given data:

The mass of cart 1 is m₁=3 kg.

The speed of cart 1 moving east is v₁=17 m/s.

The mass of other cart is m₂=5 kg.

Since the carts stick together, and comes to rest their final velocity is zero, i.e., v=0.

Applying the conservation of momentum between the carts as,

Here, v₂ is the speed of 5kg cart. Since the cart 2 moving in west direction therefore v₂=-v₂.

Substitute all the values in above equation,

Thus, the speed of 5 kg ball is 10.2 m/s.

Final answer: 10.2 m/s

Answer:

The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.

Explanation: Newton realized that the reason the planets orbit the Sun is related to why objects fall to Earth when we drop them. I am so sorry if I get this wrong, I'm in 5th grade! ♥

The Sun provides rotational motion to Earth by gravitational pull and if we get farther and farther, we will experience decreased gravitational force.

The Earth is continuously orbiting around the Sun, that is why we are experiencing the day and night everyday. And this orbiting is caused by the gravitational full by Sun on Earth, which is given as,

\(F = \dfrac{G \times M \times M'}{R^{2}}\)

Here, G is the universal gravitational constant, M is the mass of Earth and M' is the mass of Sun. And R is the distance between the Earth and Sun.

If we suppose to move farther and farther away from the Earth then the strength of gravitational pull by Earth will decrease with the increasing distance. Because the gravitational pull is inversely proportional to square of distance.

Thus, we can conclude that the Sun provides rotational motion to Earth by gravitational pull and if we get farther and farther, we will experience decreased gravitational force.

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Answer:

Same as loop #2

Explanation:

The magnitude of emf in loop #1 is the same as that of loop #2

The -3.6 × 10-4 N/C is the strength of the electric field of a point charge of magnitude +6.4 × 10-19 C at a distance of 4.0 × 10-3 m.

What is electric field ?

The electric field is described as a vector field that may be connected to each point in space and represents the force per unit charge that is applied to a positive test charge that is at rest at that location. Either the electric charge or time-varying magnetic fields can produce an electric field.

What is magnitude ?

Magnitude in physics is simply described as "distance or quantity." It shows the size or direction that an object moves in either an absolute or relative sense. It is a way of expressing something's size or scope.

Therefore, -3.6 × 10-4 N/C is the strength of the electric field of a point charge of magnitude +6.4 × 10-19 C at a distance of 4.0 × 10-3 m.

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I believe that this seismogram was collected within 100 km of the epicenter because surface waves don't travel far from epicenter, the correct option is A.

A seismogram is a graphical representation of the ground motion caused by seismic waves generated from earthquakes or other sources. The most likely explanation for the seismogram being collected within 100 km of the epicenter. Surface waves, which include Rayleigh waves and Love waves, are the slowest and most destructive seismic waves, but they do not travel far from the epicenter.

In contrast, p-waves and s-waves can travel long distances through the earth's interior, but their arrival times and wave characteristics can be used to estimate the distance from the epicenter. Since the seismogram shows clear signals of surface waves, it is more likely that it was collected within 100 km of the epicenter where the surface waves are still strong, the correct option is A.

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The complete question is:

I believe that this seismogram was collected within 100 km of the epicenter because: (group of answer choices)

A) surface waves don't travel far from epicenter

B) the second train of p-waves at point b indicates reflection from a shallow soft layer

C) the first p-wave is upwards indicating a nearby push

D) the s-waves arrived before the p-waves

Answer:

The velocity of the particle from T = 0 s to T = 4 s is;

0.5 m/s

Explanation:

The given parameters from the graph are;

The initial displacement (covered) at time, t₁ = 0 s is x₁ = 1 m

The displacement covered at time, t₂ = 4 s is x₂ = 3 m

The graph of distance to time, from time t = 0 to time t = 4 is a straight line graph, with the velocity given by the rate of change of the displacement to the time which is dx/dt which is also the slope of the graph given as follows;

\(The \ slope \ of \ the \ displacement \ time \ graph, \ m =velocity, \ v= \dfrac{x_2 - x_1}{t_2 - t_1}\)

\(Therefore, \ the \ velocity \ of \ the \ particle \ v = \dfrac{3 \ m - 1 \ m}{4 \ s - 0 \ s} = \dfrac{2 \ m}{4 \ s} = \dfrac{1}{2} \ m/s\)

The velocity of the particle from t = 0 s to t  = 4 s = 1/2 m/s = 0.5 m/s.

The atomic radius of copper is approximately 128 picometers (pm).

The atomic radius of an element is defined as half the distance between the nuclei of two identical adjacent atoms in a molecule. In the case of metallic copper, the copper atoms are arranged in a crystal lattice, and the distance between two adjacent copper atoms in the lattice is known as the interatomic distance or lattice parameter.

We are given that the distance between two adjacent copper atoms in metallic copper is 256 pm. Since this is the distance between the nuclei of two adjacent atoms, the sum of the atomic radii of the two copper atoms is equal to 256 pm.

Therefore, the atomic radius of copper can be calculated as follows:

Atomic radius of Cu = (interatomic distance between adjacent Cu atoms) / 2

Atomic radius of Cu = 256 pm / 2

Atomic radius of Cu = 128 pm

Hence, the atomic radius of copper is approximately 128 picometers (pm).

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Answer:

d=75 m

Explanation:

The horizontal launching speed is, v = 30 m/s

The vertical distance above the ground is= h m

The time of flight t= 2.5 s

The formula for free fall to apply here is:

h=1/2 *g * t²  where g is acceleration due to gravity = -9.8 m/s² and t=2.5 s

Finding h, as ;

h= 1/2 * -9.8 * 2.5² = 30.63 m

Applying the formula for range (distance d)

R= v * t

R= 30 *2.5 =75 m

The range is 75 meters.

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.

A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include the elements iron, nickel and cobalt and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.

Ferromagnetic materials can be divided into magnetically "soft" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically "hard" materials, which do. Permanent magnets are made from "hard" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a strong magnetic field during manufacture to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. "Hard" materials have high coercivity, whereas "soft" materials have low coercivity. The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in a material is measured by its magnetization.

An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of "soft" ferromagnetic material such as mild steel, which greatly enhances the magnetic field produced by the coil.

Answer:

ITS FALSE

Explanation:

I just did the quest and I wrote true and I was wronged so put False.

Answer:x rays are electromagnetic waves.

x rays are transverse waves

x rays travel at the speed of light

Explanation:

Answer:

sexual reproduction

Explanation:

Answer:

Mass of object = 8kg

Explanation:

= 1.5

You can now solve for your unknown value of mass.

A net force of 12.0 N causes an object to increase its speed from 15.0 m/s to 18.0 m/s during a 2.0 second interval. The mass of the given object 8 Kg.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Since a = change in v/ change in t,

a = (18-16)/2

a = 1.5

Force, f = ma

mass, m = F/a

          m = 12/1.5

          m = 8 Kg.    

A net force of 12.0 N causes an object to increase its speed from 15.0 m/s to 18.0 m/s during a 2.0 second interval. The mass of the given object 8 Kg.

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Answer:

3.54 x 10^-7 coulombs

Explanation:

The magnitude of the charge can be determined using the formula:

Electric field intensity (E) = Force (F) / Charge (q)

Rearranging the formula, we get:

Charge (q) = Force (F) / Electric field intensity (E)

Substituting the given values, we get:

Charge (q) = 0.137 N / (3.87 x 10^5 N/C)

q = 3.54 x 10^-7 C

Therefore, the magnitude of the charge is 3.54 x 10^-7 coulombs.

Answer:

A lever is a rigid, straight or bent bar which is capable of rotating about a fixed axis called a fulcrum. In a lever, effort distance and load distance are measured from the fulcrum. The distance between the fulcrum and the load is load distance (Ld) and the distance between the fulcrum and the effort is effort distance (Ed).

Answer:

A lever is a rigid, straight line

To find the final equilibrium temperature when a hot iron mass is placed in water, you can use the principle of heat transfer and the concept of thermal equilibrium. The final temperature will be the temperature at which the iron and water reach thermal equilibrium, meaning they have the same temperature.

To calculate the final equilibrium temperature, you can use the following formula:

m1c1(T1) = m2c2(T2)

Where:

m1 is the mass of the iron (in kg)

c1 is the specific heat capacity of iron (in J/kg·°C)

T1 is the initial temperature of the iron (in °C)

m2 is the mass of the water (in kg)

c2 is the specific heat capacity of water (in J/kg·°C)

T2 is the initial temperature of the water (in °C)

The specific heat capacity (c) is the amount of heat energy required to raise the temperature of a substance by 1 degree Celsius per unit mass.

1. Determine the values:

- Mass of the iron (m1)

- Specific heat capacity of iron (c1)

- Initial temperature of the iron (T1)

- Mass of the water (m2)

- Specific heat capacity of water (c2)

- Initial temperature of the water (T2)

2. Plug in the known values into the equation:

m1c1(T1) = m2c2(T2)

3. Rearrange the equation to solve for the final equilibrium temperature (T2):

T2 = [(m1c1(T1)) / (m2c2)] + T2

4. Calculate the final equilibrium temperature (T2) using the values from step 1:

T2 = [(m1c1(T1)) / (m2c2)] + T2

This equation will give you the final equilibrium temperature at which the hot iron and water reach thermal equilibrium. Remember to use consistent units for mass (kg) and specific heat capacity (J/kg·°C) to ensure accurate calculations.

Please note that this calculation assumes no heat loss to the surroundings and that the system is closed, meaning no energy is gained or lost to the external environment during the process. In reality, there may be some heat loss to the surroundings, which can affect the final equilibrium temperature.

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Answer:

12 m/sec

Explanation:

lambda = 2 m

period = 6 seconds     frequency = 1/p  = 1/6

speed = lambda * freq

            = 2 / 1/6 = 12 m/s

A location near a body of water, such as a lake or ocean, will generally have a higher relative humidity.

This is because bodies of water evaporate, releasing water vapor into the surrounding air. The amount of water vapor that air can hold increases with temperature, so warm air near the water can hold more moisture than cooler air further inland. As the warm, moist air moves inland and cools, it reaches its dew point, causing the excess water vapor to condense into liquid droplets, forming fog or dew.

Additionally, locations with high levels of precipitation, such as rainforests or areas with frequent thunderstorms, can also have high relative humidity due to the amount of moisture in the air. The relative humidity can be measured using a device called a hygrometer, which compares the amount of moisture in the air to the maximum amount it could hold at that temperature. A relative humidity of 100% means the air is saturated with water vapor, while lower percentages indicate drier air.

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Answer:

50 Joules

Explanation:

Answer:

3.33 m/s^2

Explanation:

\(a = \frac{v \: - \: u}{t} \)

V = final velocity ( 10m/s^2 )

U = Initial velocity ( 0m/s^2 )

t = Time taken ( 3 s )

\(a = \frac{10 - 0}{3} = 3.3333......\)

approximately = 3.33 m/s^2

Answer:

all of the above

Explanation:

Answer:

The nucleolus is a ribosome factory, composed of deoxyribonucleic acid (DNA), ribonucleic acid (RNA), and protein . ... Once the subunits have been assembled, they are transported out of the nucleolus to the cytoplasm for use in translation (protein synthesis). Nucleoli are not static structures.

Explanation:

Answer:  its the central and most important part of an object, movement, or group, forming the basis for its activity and growth

Pulsars are thought to be a group of rapidly rotating neutron stars.

A neutron star is the dense remnant left behind after the collapse of a massive star during a supernova explosion. Neutron stars are incredibly compact and contain a high concentration of neutrons. They have masses typically around 1.4 times that of the Sun but are compressed into a sphere with a radius of only about 10 kilometers.

When a massive star undergoes a supernova explosion, the core collapses under gravity, causing the protons and electrons to merge and form neutrons. This collapse results in a highly dense neutron star with a strong gravitational field.

Pulsars, a type of neutron star, are characterized by their rapid rotation and the emission of beams of electromagnetic radiation that are observed as regular pulses of radiation. These pulses occur at precise intervals and are detectable across a range of wavelengths, from radio waves to X-rays.

The emission of radiation from pulsars is believed to be caused by two main factors:

1. Rotation: Pulsars rotate rapidly, often spinning hundreds of times per second. As the neutron star rotates, it emits beams of radiation from its magnetic poles. These beams are not aligned with the rotational axis, resulting in a lighthouse-like effect where the beams sweep across space. When the beams pass through Earth's line of sight, we detect them as regular pulses of radiation.

2. Magnetic Field: Pulsars possess extremely strong magnetic fields, typically billions of times stronger than Earth's magnetic field. This powerful magnetic field interacts with the charged particles surrounding the pulsar, causing them to emit radiation in the form of radio waves, X-rays, and gamma rays.

Accreting white dwarfs, black holes, and unstable high-mass stars are not typically associated with pulsars. Accreting white dwarfs are white dwarf stars that accrete material from a companion star, black holes are formed from the collapse of massive stars, and unstable high-mass stars are stars that undergo various stages of stellar evolution before potentially exploding as supernovae.

In summary, pulsars are believed to be rapidly rotating neutron stars with strong magnetic fields that emit beams of radiation as they rotate. Their distinct pulsing behavior makes them observable as regular pulses of electromagnetic radiation across different wavelengths.

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10.

An array with 4,096 elements can be cut into two equal pieces 10 times. Each time we cut the array in half, we divide the number of elements by 2. Starting with 4,096, we have:

1st cut: 4,096 / 2 = 2,048

2nd cut: 2,048 / 2 = 1,024

3rd cut: 1,024 / 2 = 512

4th cut: 512 / 2 = 256

5th cut: 256 / 2 = 128

6th cut: 128 / 2 = 64

7th cut: 64 / 2 = 32

8th cut: 32 / 2 = 16

9th cut: 16 / 2 = 8

10th cut: 8 / 2 = 4

After the 10th cut, we are left with two equal pieces of 4 elements each. Therefore, the array can be cut into two equal pieces 10 times.

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The initial velocity of the car is 20.6 m/s before braking.

When coming to a halt, a car leaves skid marks 80 meters long on the highway.

Assuming a deceleration of 7.0 m/s2, determine the velocity of the vehicle just before braking.

In coming to a stop, a car leaves skid marks 80 meters long on the highway, with a deceleration of 7.0 m/s².

We can calculate the velocity of the vehicle just before braking using the equation that relates distance, velocity, and acceleration. Here's the equation:Vf² = Vi² + 2ad

We must first solve for Vf, which represents the final velocity, or the velocity of the vehicle just before braking.Vi = Initial velocity = ?a = Acceleration = -7.0 m/s² (negative because the car is decelerating)

d = Distance = 80 mVf = Final velocity = ?

We can now plug in the values into the equation and solve for Vf.

Vf² = (39.3 m/s)² + 2(-7.0 m/s²)(80 m)

Vf² = 1544.49 m²/s² - 1120 m²/s²

Vf² = 424.49 m²/s²

The final velocity, Vf, of the vehicle can now be determined, given that Vi (initial velocity) is unknown. However, we can calculate it if we consider that the car's velocity was constant until braking.

Thus, the distance covered during braking (80 m) was equal to the distance covered by the car at the constant velocity, which was Vi, before braking.d = vt80 m = Vi(t)Solving for t:t = 80 m/Vi

We can now substitute this value of t back into the original equation: Vf = √(424.49 m²/s²)

Vf ≈ 20.6 m/s (rounded to one decimal place)

The initial velocity of the car is 20.6 m/s before braking.

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Answer:

Explanation:

Definitely NOT! Mass is unchanging, wherever you go. On the moon you will have the same mass as you will on the earth. Mass is just a measure of the matter that makes up a body. Weight, however, is dependent upon the pull of gravity which is different on earth than it is on the the moon, for example.

Mass doesn't change with proximity whereas weight can.

Answer: No

Explanation: The terms'mass' and 'weight' are frequently used interchangeably, yet they have distinct meanings. Your mass remains constant regardless of where you are in the universe; nevertheless, your weight varies. The mass of anything is a measure of how much power is required to change its course.

Answer:

The vehicle safety check indicates the ABS is functioning normally.:

Answer:

air mass

Explanation:

Remember, the weather of a particular location is often a description of the atmospheric condition of that particular place.

Indeed, the definition of an air mass fits the reporter's description above. As the name implies, a particular air mass would represent the temperature characteristics of a particular area that has a constant or the same temperature and air pressure.

Answer:

the greater the half life is the slower the rate of decay will be.

Explanation:

half life of a radioactive substance is inversely proportional to the radioactive decay.

Answer:

B. The greater the half life is, the slower the rate of decay will be

Explanation: Most living things contain carbon-14, an unstable isotope of carbon that has a half-life of around 5,000 years. That means that when scientists dig up fossil bones, they can figure out how old they are by measuring the amount of carbon-14 remaining in the bones.