Find the displacement of the body in 5 seconds from the beginning of the
motion is

Answer:

The centripetal acceleration of car is 8 m/s².

Explanation:

Answer:

5.26 m/s

Explanation:

Given that,

The frequency of mosquito's wings, f = 1050 Hz

The observed frequency = 1034 Hz

We need to find the velocity of the mosquito travelling with respect to you. We have a formula to find it such that,

\(v=\dfrac{v}{\dfrac{f'}{f}}-v\)

Where

v is the speed of sound

So,

\(v=\dfrac{340}{\dfrac{1034}{1050}}-340\\\\v=5.26\ m/s\)

So, the required velocity is equal to 5.26 m/s/

Water molecules travel more quickly when they are hotter, close to the bottom of the beaker, but they slow down as they cool and rise due to convection.

The water molecules spread out more and travel more quickly when the water is heated. Due to this, hot water is less dense than water at ambient temperature. Since heated water is less dense than room-temperature water, it floats on it.

Moving downward and towards the heat source is the cold water from the edges. Additionally heated, this water raises, and water from the sides moves downward. This procedure keeps going until the water is heated throughout.

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Answer:

B = B (cos θ  x ^ + sin θ  y ^)

Explanation:

To represent the magnetic field B using unit vectors, the magnitude of the field and the angle with respect to some coordinate axis must be known. Having this information, trigonometry can be used.

Suppose that the angle we have is with respect to the positive side of the x-axis, let's use trigonometry

             cos θ = Bₓ / B

             sin θ = \(B_{y}\) / B

             Bx = B cos θ

             B_{y} = B sin θ

so the resulting vector is

             B = Bₓ i ^ + B_{y} j ^

unit vectors

             x ^ = i ^

             y ^ = j ^

let's write the complete answer

          B = B (cos θ  x ^ + sin θ  y ^)

The bold indicate vector

Answer:

These acts of attraction and repulsion are called “magnetism”, and the magnetic space around a magnet is called the “magnetic field”

Explanation:

Answer:

weight of two people

Explanation:

Suppose two people are walking and among the two people, if one is heavier than the other, then the one weighing heavier will walk slower because the acceleration of the person weighing lighter is greater.

2nd Law: F=ma

a= change in velocity/time

a=F/m

say both objects must accelerate at a=2 m/s^2

object A is a wood plank, which is roughly 10 kg

object B is my metal ball, which has a mass of 100kg

now, solving for F applied to both objects

Fwood=(10kg)(2 m/s2)= 20 N

Fmetal=(100kg)(2 m/s2)= 200 N

the F needed to move the metal ball is 10 times greater than the F needed to move the wood plank. Hope this helped, I'm about to go fail my physics exam :)

Answer:

k.e.

1/2 ×2×4=4

1/2×6×4=12

m.

16×2÷4=8

20×2÷4=10

The force responsible for the acceleration of the crate is the frictional force between the crate and the bed of the truck.

When the truck accelerates, the crate tends to remain at rest due to inertia. However, the frictional force between the crate and the bed of the truck acts in the forward direction, allowing the crate to accelerate along with the truck.

This frictional force is a result of the interaction between the surfaces of the crate and the truck bed. Without this frictional force, the crate would slide or move independently from the truck's acceleration.

The frictional force arises due to the microscopically rough surfaces of the crate and the truck bed. As the two surfaces are pressed against each other, intermolecular forces come into play, resulting in the generation of the frictional force

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The properties of stars are:  mass, age, distance, metallicity (chemical composition), variability and motion through space.

An astronomical object known as a star is made up of a bright plasma spheroid that is held together by gravity. The Sun is the star that is closest to Earth.

Other stars are also visible at night with the unaided eye, but because to their great distances from Earth, they appear as stationary points of light. Many of the brightest stars have names, and the most notable stars have been grouped into constellations and asterisms.

Star catalogues have been put out by astronomers that list the known stars and offer standardized stellar labels.

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Answer: Stars produce energy through nuclear fusion.

Stars are massive objects composed of gas.

Stars are composed primarily of hydrogen and helium.

P.S can I get the brainiest?

Answer:

Due to the direction of force due to pressure.

Explanation:

Let there be two small holes having area, \(a\) , at points A and B in the bottle filled with water as shown in the figure \((i)\). Water comes out at the right angles to the wall of the bottle as shown in figure \((ii)\).

From Newton's second law, the acceleration of an object is always in the direction of net applied force.

We know that pressure, \(P\), on any surface due to fluid acts perpendicular to the surface, so, the force due to pressure,\(F=Pa\), will also be perpendicular to the surface as shown in the diagram\((iii)\).

So, the direction of the acceleration of the water element at that point will be perpendicular to the bottle surface which leads to the change in velocity of the water element in the same direction.

That's why water comes out at right angles to the surface of the bottle.

Answer:

Sorry for being late. Hope this helps

Explanation:

An atom with only 1 to 3 valence electrons will tend to lose/subtract those valence electrons. That is option D.

Valence electrons are those electrons that are located at the outermost layer of an atom.

During a chemical reaction, elements that have 1 or 2 or 3 valence electrons donate or give out their electron to form a chemical bond with another aton if an element.

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Answer:

depends if it is wireless

Explanation:

if not a socket in a wall or surface. if not then it will probably use batteries.

Answer:it is c i just did it and got it right. :3

Explanation:

No, a planet with an average surface temperature of 735 K will not lose water molecules to space if its escape speed is 10.4 km/s.

The ability of a planet to retain its atmospheric molecules depends on various factors, including the average kinetic energy of the molecules and the escape speed of the planet. In this case, the average surface temperature of the planet is 735 K, which corresponds to high thermal energy for the water molecules in the atmosphere.

However, the escape speed of the planet is given as 10.4 km/s.

To determine whether the water molecules will escape to space, we compare the average thermal velocity of the water molecules to the escape speed. The average thermal velocity of a gas molecule can be calculated using the root mean square velocity formula, which depends on the temperature and the molecular weight. Considering the molecular weight of water as 34 g/mol, the average thermal velocity can be determined.

Given the high temperature of the planet, the average thermal velocity of water molecules would be relatively high. However, since the escape speed of the planet is significantly higher than the average thermal velocity of the water molecules, they would not have enough kinetic energy to overcome the planet's gravitational pull and escape into space.

Therefore, the planet will not lose water molecules from its atmosphere despite the high temperature.

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Use the following kinematic equation:

where,

v: final speed = 25m/s

vo: initial speed = 0m/s

t: time interval = 30.0s

a: acceleration = ?

replace the previous values of the parameters into the expression for a and simplify:

The acceleration of th train is approximately 0.83m/s^2

The spectral lines are spectra in which only a certain wavelength of light is emitted. spectrum can be observed from distant stellar objects.

The definite wavelength spectral lines can be observed from different elements.

Comparing definite wavelengths of emission spectra and spectra of distant stellar objects, we can determine the motion of the stellar body.

If the body is moving, then the Doppler effect plays an effective role by altering the wavelengths of the emission spectra.

Two cases will take place:

First: If the body is moving away, then the wavelength of emission spectra will shift toward red.

Second: If the body is moving towards, then the wavelength of emission spectra will shift toward the blue end.

This phenomenon is only observed in the case of radial movement of the body.

In the case of tangential motion, the Doppler effect won't play a role. so we observe no change in spectral lines.

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The main difference between the Bohr model and the electron cloud model is explained as, in Bohr's model, orbital paths around the nucleus are treated as discrete electron energy levels but the electron cloud model is a group of electrons circulating around a nucleus or a molecule. Usually refers to the valence electrons.

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The scenario that correctly illustrates heat is: "a bathtub full of hot water gets even warmer in a cold room."

Heat is a form of energy that is transferred between two or more objects or systems due to a difference in temperature. Heat energy flows from hotter objects or systems to colder ones until thermal equilibrium is reached, meaning that the temperatures of the objects or systems become equal.

The  scenario of a bathtub full of hot water gets even warmer in a cold room  illustrates heat because heat always flows from hotter objects to colder objects until they reach thermal equilibrium. In this scenario, the hot water in the bathtub is at a higher temperature than the cold room, so heat flows from the water to the surrounding air, causing the water to become even warmer.

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A large glob of seagull poop hits you in the face. You are able to estimate the impact velocity at 98.5 m/s. The vertical component is something less than 98.5 m/s, and that the attack was launched from an altitude less than 494 m.  

The term acceleration is defined as any process where the velocity changes. So, velocity is a speed and a direction, there are only two ways for you to accelerate are change your speed or change your direction or change both.

98.5 m/s  =  √ [ (horizontal component)² + (vertical component)² ].

The vertical component = (9.8 m/s²) x (drop time).

Therefore, we're looking for the altitude of launch,

we can use the formula for 'free-fall distance' as a function of acceleration and time as follows:

Height = (1/2) (acceleration) (time²) .

Time = (98.5 m/s) / (9.81 m/s²)

= 10.04 seconds

Height = (1/2) (9.81) (10.04)²

=   (4.905 m/s²) x (100.8 sec²)  

= 494.43 meters.

Thus, the vertical component is something less than 98.5 m/s, and that the attack was launched from an altitude less than 494 m.  

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Answer:

They are gaining energy, can move and slide past each other.

Explanation:

Because as ice melts, the molocules gain energy/heat which warm them up and are able to slide/move apart from each other.

Answer:

the magnitude of the dog's total displacement to the nearest tenths = 53.12°

Explanation:

Given that:

a dog walks 8.0m due to the north and 6.0 m due east.

We can determine the magnitude of the dog's total displacement by using the Pythagoras theorem.

Consider the north direction be the opposite and the east direction to be the adjacent, therefore the hypotenuse will be the dog's total displacement.

So, suppose hypotenuse is represented by a

the opposite represented by b, and the adjacent represented by c

Then;

a² = b² + c²

a² = 8²  +  6²

a² = 64 + 46

a² = 100

a =\(\sqrt{100\)

a = 10.0 m

However, the magnitude of the dog's total displacement is calculated by taking the tangent of the system.

tan θ = opposite / adjacent

tan θ = b/c

tan θ = 8/6

tan θ = 4/3

tan θ = 1.333

θ = tan⁻¹ (1.333)

θ = 53.12

the magnitude of the dog's total displacement to the nearest tenths = 53.12°

1.53 m/s  is the speed of a child on the rim (in m/s) . 3rev revolutions does the merry go round make as it stops (in rev)

d =diameter of the merry-go-round = 5.0 m

r = radius of the merry-go-round = d/2 =  5.0/2 = 2.55 m

T = time period of the merry-go-round = 4.0 s

Wi = initial angular velocity of merry-go-round

Initial angular velocity is given as

Wi = 2π/T

Wi =1.53 rad s⁻¹

Wf = final angular velocity of merry-go-round = 0 rad s⁻¹

t = time taken to stop = 20 s

∅ = angular displacement = ?

n = Number of revolutions made before stopping

Angular displacement is given as

∅ =( Wf+Wi)t/2

∅ + 19.125rad

Number of revolutions are given as

n = ∅ /2π

n = 3rev

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The magnitude of the magnetic field of the protons that have a velocity of magnitude 7.1 × 10⁵ m/s in the x-z plane at an angle of 22° to the positive z axis and if the force on a proton is 1.2 × 10⁻¹⁴ N is 0.023 Tesla.

To solve this problem, we can use the equation for the force on a charged particle in a magnetic field:

F = qvBsinθ

where F is the force, q is the charge of the particle, v is its velocity, B is the magnitude of the magnetic field, and θ is the angle between the velocity and the magnetic field.

In this case, we are given the force on a proton (F = 1.2 × 10⁻¹⁴ N), the velocity of the proton (v = 7.1 × 10⁵ m/s) and the angle between the velocity and the magnetic field (θ = 22°). We also know the charge of the proton (q = +1.6 × 10⁻¹⁹ C).

We can rearrange the equation to solve for the magnetic field (B):

B = F / (qv sinθ)

Plugging in the given values, we get:

B = (1.2 × 10⁻¹⁴ N) / [(+1.6 × 10⁻¹⁹ C) × (7.1 × 10⁵ m/s) × sin(22°)]

B = 0.023 T

Therefore, the magnitude of the magnetic field is 0.023 Tesla.

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Answer:

D, E, and F

Explanation:

Like a gas, plasma lacks a fixed volume and shape. Unlike a gas, plasma can conduct electricity and respond to magnetism. That's because plasma contains charged particles called ions. The particles that make up matter are also constantly moving.

The properties of both a gas and a plasma are:

A gas lacks both a fixed volume and a fixed shape. While certain gases are palpable to humans and can be seen and felt, others are not. The gases oxygen, helium, and air are a few examples. N2, O2, and CO2 are among the gases that make up the Earth's atmosphere.

Both the volume and shape of plasma are illusive. Ionized gases frequently contain plasma, yet plasma differs from a gas in that it has special characteristics. The plasma is electrically conductive because it contains free electrical charges that aren't attached to atoms or ions. A gas can be heated and ionized to create plasma. Stars, lightning, fluorescent lights, and neon signs are a few examples of plasma.

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Answer:

V = f * λ           velocity equals frequency * wavelength

If f is increased then λ must decrease for the velocity to remain constant.

A metal rod with a diameter of 8.2 centimeters or less could float in water under the given conditions.

The maximum weight that can be supported by surface tension,

W = 2πσcosθd

where, σ is the surface tension between the water and steel (72.8 mn/m)

θ is the contact angle between the steel and water (30 degrees or π/6 radians)

d is the diameter of the rod

Weight of the rod is given by,

W_rod = Vρg

where, V is the volume of the rod

ρ is the density of the steel (8,000 kg/m^3)

The volume is given by:

V = π/4 * d^2 * L

where L is the length of the rod.

Setting W = W_rod,

2πσcosθd = π/4 * d^2 * L * ρ * g

d = √(4σcosθ/ρgL)

d = √(4 * 72.8 × 10^-3 N/m * cos(π/6) / (8,000 kg/m^3 * 9.81 m/s^2 * L))

d = √(6.79 × 10^-6 / L)

Therefore, the diameter of the metal rod that can be made to float depends on the length of the rod. For example, if the length of the rod is 1 meter, then:

d = √(6.79 × 10^-6 / 1) ≈ 0.082 meters or 8.2 centimeters

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