two spaceships head towards each other, both at v = 0.36 c as measured by someone on earth. what is the observed relative speed between the spaceships

A book falls off of a \displaystyle 2.2m high    table. If the book weighs \displaystyle 0.75kg, what will its    final velocity be right before it hits the ground?

Answer:

C. The water molecules must gain kinetic energy

Explanation:

Whut school do u go to- my school uses the whole (-- points) thing too

Answer:

Electric current is electric charge in motion. It can take the form of a sudden discharge of static electricity, such as a lightning bolt or a spark between your finger and a ground light switch plate. ... Most electric charge is carried by the electrons and protons within an atom.

Explanation:

because it is

Answer:

A

Explanation:

The effects due to light from distant stars

The characteristics of the solar system would have to be known or calculated in order to send a probe to a distant planet, such as Jupiter, due to the effects of the gravity from the other planets. Hence, option C is the correct answer.

When sending a probe to a distant planet, such as Jupiter, one of the critical factors that would have to be known or calculated is the effects due to the gravity from the other planets in the solar system. The gravitational interactions between the planets can significantly influence the trajectory and path of the probe during its journey. Accurate calculations are necessary to ensure that the probe's trajectory is properly planned and adjusted to reach its destination with precision. Hence, option C is the correct answer.

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Explanation:

So,

speed = wavelength x frequency

speed = 2.3 meters x 5 Hz => 11.5 meters per second

Therefore, the speed of the wave is 11.5 meters per second.

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Answer:

Ro = 1000 [kg/m³]

Explanation:

We must remember that density is defined as the relationship between mass and volume.

\(Ro=m/V\\\)

where:

Ro = density [kg/m³]

m = mass = 3 [kg]

V = volume = 3000 [ml]

We must convert the volume of milliliters to cubic meters

\(3000[ml]*\frac{0.001Lt}{1ml}*\frac{1m^{3} }{1000Lt} = 0.003m^{3}\)

Now replacing:

\(Ro=3/0.003\\Ro=1000[kg/m^{3} ]\)

Answer:

Observation is usually the first step in scientific method

Scientists try to understand the phenomena that occur in the environment.

Assume for the moment that it shows a young child embracing her mother before he departs for a tour of service abroad. How would you employ science to analyse her effects.

What in physics is an energy?

The definition of energy is ability to do work," which is the capacity to apply a force that causes an item to move. organismal biology the study of sentient creatures Social science is the study of people and society.

photo of How might science be used for research,Students who study science get the chance to learn more about how and how things work. Children can learn about the environment they live in through science.

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Answer: The science I would use to study the impact of the father’s departure from her family would be interpretive sociology.

Explanation: The reason I chose this science is because it focuses on the cause of people’s actions.

Equation of motion: To find the equation of motion and the oscillation frequency of a mass-spring system, we'll use Newton's second law of motion.

Force (F) = mass (m) × acceleration

F = ma

The force acting on a spring is given by Hooke's law:

F = -k x

where k is the spring constant and x is the displacement from the equilibrium position.

Thus, combining these two equations gives us the following equation of motion for a mass-spring system:

ma = -k x

Rearranging this, we get:

m(d²x/dt²) + k x = 0

This is the differential equation of motion of the mass-spring system.

Oscillation frequency:

The oscillation frequency can be calculated using the equation:

f = (1/2π) √(k/m)

where f is the frequency, k is the spring constant, and m is the mass.

Lagrange function:

The Lagrange function for a mass-spring system can be written as:

L = T - VL

is the difference between the kinetic energy (T) and potential energy (V) of the system.

The kinetic energy of the system is given by:

T = (1/2) mv²where m is the mass and v is the velocity.

The potential energy of the system is given by:

V = (1/2) kx²

where k is the spring constant and x is the displacement from the equilibrium position.

L = (1/2) mv² - (1/2) kx²

Equation of motion:

Using the Euler-Lagrange equation, the equation of motion for a mass-spring system can be derived.

It is given by:

d/dt (∂ L/∂v) - ∂L/∂x = 0

Substituting the values from the Lagrange function:

L = (1/2) mv² - (1/2) kx²∂L/∂v = m v ∂L /∂x = -k x.

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Answer: The color is orange, the state of matter is liquid

Explanation:

Answer:

I don't really understand what you are asking but... i can try to help

The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.

Hope this helps sorry I couldn't answer it☺️

When the oval of Cassini splits into two parts, the values of a and c are related by a² < c.

The polar equation for the ovals of Cassini is given by:

r² = (x² + y²) = (a² - c²) ± 2acosθ

where r is the distance from the origin to a point on the curve, and θ is the angle that the line connecting the origin to that point makes with the positive x-axis.

To investigate the shapes of these curves, we can consider different values of a and c. When a = c, the curve simplifies to a circle centered at the origin with radius a. When a > c, the curve is a single, closed oval shape, as shown below:

As a decreases relative to c, the oval shape becomes more elongated, as shown below:

When a = c√2, the curve splits into two separate ovals, as shown below:

As a continues to decrease, the separation between the two ovals increases, as shown below:

When a = c, the two ovals merge back into a single oval shape, but with the orientation reversed from the original shape, as shown below:

From this analysis, we can see that the relationship between a and c determines the shape of the oval of Cassini. When a = c√2, the curve splits into two separate ovals. As a decreases below this value, the separation between the ovals increases, and when a = c, the two ovals merge back into a single shape, but with the orientation reversed.

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Answer:

71.6 mph

Explanation:

you would do 645 divided by 9 which would give you 71.6

Answer:

what's the question

Explanation:

I don't understand the question

Answer:

7.5x10-^8m

Explanation:

the formulae is v=fh ,where f is frequency

h is wavelength

hence wavelength=v/f

since the speed of light is 3x10^8

then the wavelength =3 x 10^8/4 x 10^15

=7.5x10^-8m

Answer:

Electric eels DO endanger themselves by generating electricity. They frequently shock themselves.

That is one animal but I hope it helps!!!

It makes sense for the valence electrons to stay the same within a group because these elements have same chemical properties.

We have a group from Periodic table.

We have to investigate the reason behind the fact that why elements with same number of valence electrons share the same group.

Periodic Table is a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (similar chemical properties) appear in vertical columns.

According to the question -

It is true that the number of valence electrons in the outermost shell of the elements of same group are equal. The number of valence electrons in the outermost orbit of the elements of the same group is same as the group number to which they belong. The elements in the same group have same number of valence electrons in their outermost shell. Due to this the elements have almost same Physical properties, Chemical properties and Reactivities of the elements.

Hence, it makes sense for the valence electrons to stay the same within a group because the elements in the same group have same properties.

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Answer: drying paint

Explanation:

From the options that are given in the question, we should note that car manufacturers use radiation for drying paint.

The radiation is vital as it keeps the car cool and also helps in the reduction if heat in the vehicle. The other options such as sealing windows, cleaning tires and lubricating engines aren't true as radiation isn't used for that purpose by the car manufacturers.

Answer:

drying paint

Explanation:

Answer:

2.75 × e10

put the decimal in front of the first real number. put e to however many spaces from the original

The diameter of a water molecule is 0.000000000275 m, it can be expressed as 2.75 x \(10^{-10\) m.

A water molecule has a diameter of 0.000000000275 m, which corresponds to 2.75 x \(10^{-10\) m in scientific notation.

Numbers are stated in scientific notation as a coefficient, which is a number between 1 and 10, multiplied by a power of 10. The power of 10 in this situation is -10, and the coefficient is 2.75.

The number is incredibly small since the exponent is negative, which means the decimal point is 10 places to the left.

Extremely big or small numbers are frequently represented more compactly and clearly using scientific notation, which makes it simpler to work with and compare such quantities.

Thus, this can be expressed as 2.75 x \(10^{-10\).

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Answer:

D. Segment Addition Postulate

Explanation:

I got it correct on the quiz.

The bird will do work of 24700 J when moving the nest up 5.0 m.  To solve this problem, we need to calculate the force required to move the nest up 5.0 m and the work done by the bird.

First, we need to calculate the force required to move the nest up 5.0 m. We can use the formula for force:

F = m * a

where m is the mass of the object and a is the acceleration due to gravity. The acceleration due to gravity is \(9.8 m/s^2,\) so we can calculate the force as:

F = 500 kg * 9.8 m/s^2

= 4940 N

Next, we need to calculate the work done by the bird. Work is defined as the product of force and displacement:

W = F * d

where W is the work, F is the force, and d is the displacement. The displacement is the change in position of the object, so in this case the displacement would be the distance between the second floor and the original position of the nest.

We can calculate the distance as the height of the second floor minus the height of the ground. The height of the second floor is 5.0 m, and the height of the ground is 0.0 m (since the nest was originally on the ground). Therefore, the distance is:

d = 5.0 m - 0.0 m

= 5.0 m

So the work done by the bird is:

W = 4940 N * 5.0 m

= 24700 J

Therefore, the bird will do work of 24700 J when moving the nest up 5.0 m.  

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The scale will read 147N

The mass of the object, m = 15 kg

Since I am on the earth, the acceleration due to gravity on the earth is:

g = 9.8 m/s²

The scale will read the weight of the object, and is calculated below

The weight, W = mg

W = 15(9.8)

W = 147 N

Therefore, the scale will read 147N

F"=4F/9 or F"=4F ÷9 is the magnitude for the force acting on the 4q charge.

Coulomb's law states that the magnitude of the forces between Q and 4Q is,

F'=КQ×4Q÷d²

= 4F ---------------------------(1)

Now, if the distance is made 3 times greater than before, or in three dimensions,

F''=КQ×4Q÷ (3d)²

Or F''= 4КQ² ÷ 9d²

or,  F''= 4÷9 × ₍КQ²÷ d²₎

or,  F''= 4F/9

Coulomb's law: a rule indicating that opposing charges attract and similar charges repel, with a force proportional to the product of the charges and inversely proportional to the square of the space between them.

Dimensions: an area that may be measured for its length, width, depth, or height.

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Answer:

IF SHE BREATHS SHES A T.H.OT

Explanation:

Pls dont hate me its meme k ,_.

The two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that the bullet will hit the target are given by:θ1 = (-1/2) [arctan(2a/(-b - √(b^2 - 4ac))) + π/2 + nπ] andθ2 = (-1/2) [arctan(2a/(-b + √(b^2 - 4ac))) + π/2 + nπ]where n is an integer.

In the given case, the figure shows an exaggerated view of a rifle that has been sighted in for a 91.4-meter target. Let the muzzle speed of the bullet be v0 = 427 m/s.

Now, we are required to find the two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that the bullet will hit the target.

It is known that the horizontal displacement of the bullet from the gun can be given by the equation: x = v0 t cosθ ..........(i)and the vertical displacement of the bullet from the gun can be given by the equation: y = v0 t sinθ - (1/2) g t^2..........(ii).

Here, t is the time of flight of the bullet and g is the acceleration due to gravity.

As the bullet hits the target, its final vertical displacement from the gun is equal to the height of the target, i.e.,y = 91.4m.Now, we can substitute equations (i) and (ii) in place of t and y in equation (ii) to get:x tanθ - (g/2v0^2) x^2 sec^2θ = 91.4 ..........(iii)This is a quadratic equation in tanθ.

On solving this equation using the quadratic formula, we get:tanθ = [-b ± √(b^2 - 4ac)]/2aWhere,a = -gx^2/(2v0^2) = -4.9x^2/v0^2, b = x, and c = -91.4.

Rearranging the terms, we get:2a tanθ^2 + b tanθ - 91.4 = 0On substituting the given values, we get:2(-4.9x^2/v0^2) tanθ^2 + x tanθ - 91.4 = 0θ1 and θ2 are the two possible angles which can be found by solving the above quadratic equation.

Using the trigonometric identity given in the hint, we can write: sin 2θ = 2 sinθ cos θ = 2 tanθ/ (1 + tan^2θ)Now, we can substitute tanθ = (-b ± √(b^2 - 4ac))/2a in the above equation to get: sin 2θ = (-4bx ± 2x√(b^2 - 4ac))/(b^2 + 4a^2)Now, we can substitute the given values to get: sin 2θ1 = -0.999sin 2θ2 = 0.998.

Thus, we get two values of sin 2θ, one is close to -1 and the other is close to 1. As sin 2θ = -1 when 2θ = -π/2 + nπ and sin 2θ = 1 when 2θ = π/2 + nπ, where n is an integer, we get two possible values of θ for each of these two cases.

Hence, the two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that the bullet will hit the target are given by:θ1 = (-1/2) [arctan(2a/(-b - √(b^2 - 4ac))) + π/2 + nπ] andθ2 = (-1/2) [arctan(2a/(-b + √(b^2 - 4ac))) + π/2 + nπ]where n is an integer.

As one of these angles is so large that it is never used in target shooting, we only need to consider the other angle.

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The two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that the bullet will hit the target are given by:θ1 = (-1/2) [arctan(2a/(-b - √(b^2 - 4ac))) + π/2 + nπ] andθ2 = (-1/2) [arctan(2a/(-b + √(b^2 - 4ac))) + π/2 + nπ]where n is an integer.

In the given case, the figure shows an exaggerated view of a rifle that has been sighted in for a 91.4-meter target. Let the muzzle speed of the bullet be v0 = 427 m/s.

Now, we are required to find the two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that the bullet will hit the target.

It is known that the horizontal displacement of the bullet from the gun can be given by the equation: x = v0 t cosθ ..........(i)and the vertical displacement of the bullet from the gun can be given by the equation: y = v0 t sinθ - (1/2) g t^2..........(ii).

Here, t is the time of flight of the bullet and g is the acceleration due to gravity.

As the bullet hits the target, its final vertical displacement from the gun is equal to the height of the target, i.e.,y = 91.4m.Now, we can substitute equations (i) and (ii) in place of t and y in equation (ii) to get:x tanθ - (g/2v0^2) x^2 sec^2θ = 91.4 ..........(iii)This is a quadratic equation in tanθ.

On solving this equation using the quadratic formula, we get:tanθ = [-b ± √(b^2 - 4ac)]/2aWhere,a = -gx^2/(2v0^2) = -4.9x^2/v0^2, b = x, and c = -91.4.

Rearranging the terms, we get:2a tanθ^2 + b tanθ - 91.4 = 0On substituting the given values, we get:2(-4.9x^2/v0^2) tanθ^2 + x tanθ - 91.4 = 0θ1 and θ2 are the two possible angles which can be found by solving the above quadratic equation.

Using the trigonometric identity given in the hint, we can write: sin 2θ = 2 sinθ cos θ = 2 tanθ/ (1 + tan^2θ)Now, we can substitute tanθ = (-b ± √(b^2 - 4ac))/2a in the above equation to get: sin 2θ = (-4bx ± 2x√(b^2 - 4ac))/(b^2 + 4a^2)Now, we can substitute the given values to get: sin 2θ1 = -0.999sin 2θ2 = 0.998.

Thus, we get two values of sin 2θ, one is close to -1 and the other is close to 1. As sin 2θ = -1 when 2θ = -π/2 + nπ and sin 2θ = 1 when 2θ = π/2 + nπ, where n is an integer, we get two possible values of θ for each of these two cases.

Hence, the two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that the bullet will hit the target are given by:θ1 = (-1/2) [arctan(2a/(-b - √(b^2 - 4ac))) + π/2 + nπ] andθ2 = (-1/2) [arctan(2a/(-b + √(b^2 - 4ac))) + π/2 + nπ]where n is an integer.

As one of these angles is so large that it is never used in target shooting, we only need to consider the other angle.

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The formation of the planet Uranus is estimated to have occurred approximately between the planets Jupiter and Neptune.

The formation of Uranus is believed to have taken place in the protoplanetary disk, a rotating disk of gas and dust surrounding the young Sun. Within this disk, planets formed through the process of accretion, where smaller particles came together to form larger bodies. Uranus is thought to have formed further away from the Sun compared to the inner rocky planets like Earth. Based on current models of planetary formation and the distribution of materials in the protoplanetary disk, scientists estimate that Uranus formed in the region between Jupiter and Neptune. However, it's important to note that our understanding of planetary formation is still evolving, and ongoing research continues to refine our knowledge.

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When a volleyball is tossed over a net, starting from a height of 1.5 meters above the ground, where  after reaching the top of its trajectory it returns to its original height as it falls, the ball's speed is the same as when it was tossed, but its velocity is different.

As ball 1 gets to the top of its trajectory, its velocity becomes zero.

since not stated otherwise, we assume that both balls have the same properties

If ball 2 is released at this instance, then they both will travel down at the same time interval and have initial velocity as zero.

since vertical travel is downwards, then acceleration due to gravity g is positive for both balls.

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The rotational kinetic energy of this disk is b) 2.25J.

To find the rotational kinetic energy of the solid disk, we'll use the formula KE_rot = 0.5 * I * ω², where KE_rot is the rotational kinetic energy, I is the moment of inertia, and ω is the angular velocity. For a solid disk, the moment of inertia (I) can be calculated using the formula I = 0.5 * m * r², where m is the mass and r is the radius.

Given: m = 0.50 kg, r = 0.15 m, and ω = 20.0 radians per second.

First, we calculate the moment of inertia:
I = 0.5 * 0.50 kg * (0.15 m)² = 0.01125 kg m²

Next, we calculate the rotational kinetic energy:
KE_rot = 0.5 * 0.01125 kg m² * (20.0 radians per second)² = 2.25 J

Therefore, the rotational kinetic energy of the disk is 2.25 J, which corresponds to option (b).

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If an athlete moves faster, her momentum will increase. This is because momentum is the product of an object's mass and velocity. So, if the athlete's velocity (speed and direction) increases, her momentum will increase as well.

When an athlete moves faster, her momentum increases. Momentum is the product of an object's mass and velocity. In this case, the mass of the athlete remains constant, but the velocity (speed in a specific direction) increases as she moves faster. Therefore, the momentum of the athlete also increases.

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Answer:

I think it might be A: Alec but tell me if I'm wrong

Explanation:

Answer:

a

Explanation:

i did it on e d g e n u i t y