A ball is thrown straight up into air at 49m/s. How long is it in the air 4s a O 8s .b O 10s .c 7s .d O

Answer:

greater then five

Explanation:

Answer:

Equal to 5

Explanation:

Newton's third law. Hit the baseball or kick the soccer ball with a small amount of force. The ball will not travel very far. Then, hit or kick the ball with a large amount of force and watch what happens. The ball will have an equal and opposite reaction to the amount of force it his hit with.

The everyday activities that most illustrates the concept of accretion are rainbows forming in the sky after a rain shower and a dough mixer forming a “ball” from ingredients.

Accretion is the process in which something grows or increases in size by accumulation of additional layers of matter. In astronomy it is usually due to force of attraction between two particles.

Here, during a rainbow formation all seven colours in order form a circle layer by layer due to refraction of sunlight in rain water. In a dough mixer, the final ball is not formed all at once. First a small ball is initially formed and more flour gets added up to it forming the final ball.

Therefore, the everyday activities that most illustrates the concept of accretion are rainbows forming in the sky after a rain shower and a dough mixer forming a “ball” from ingredients.

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Answer:

B

Explanation:

Answer:

B

Explanation:

The first ionization energy of at c. 800 kJ/m

Based on the trend in the periodic table, we know that ionization energy increases as we move from left to right across a period. Astatine is located in Group 17, which is also known as the halogens, and is the last element in the period. Therefore, we can estimate that the first ionization energy of Astatine would be the highest among the halogens. Looking at the options given, the closest value to our estimation would be 800 kj/mol (option b). However, it is important to note that this is just an estimate and the actual value may differ slightly due to various factors.
To estimate the first ionization energy of astatine (At), we can look at the periodic trend of ionization energies for halogens. Ionization energy generally increases across a period and decreases down a group. Astatine is in Group 17, below iodine (I). Iodine's first ionization energy is around 1000 kJ/mol. Since ionization energy decreases down a group, a reasonable estimate for the first ionization energy of At would be slightly lower than that of iodine. Therefore, the best option from the given choices is:

c. 800 kJ/mol

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The vernal or spring equinox occurs in the northern hemisphere on March 21 or 22.

Explanation:

Given the conditions A,B and C when the pendulum is released, at point A the initial velocity of the pendulum is zero(0), the potential energy stored is maximum(P.E= max),

the conditions can be summarized bellow

point A

initial velocity= 0

final velocity=0

P.E= Max

K.E= 0

point B

initial velocity= maximum

final velocity=maximum

P.E=K.E

point C

initial velocity= min

final velocity=min

P.E= 0

K.E= max

The length of brass rod after expansion is 2.0036m.

By definition, the length increase is:

Delta L = Alpha L_0 Delta TΔL=αL

naΔT

where alpha = 18 times 10^{-6}K^{-1}α=18×10−6

K-1

is expansion, L0 = 2 ml

na=2m is the initial length and Delta T = 100KΔT=100K is the temperature change. How to get:

Delta L = 18 times 10^{-6}cdot 2cdot 100 = 3.6 times 10^{-3} = 0.0036mΔL=18×10

−6

⋅2⋅100=3.6×10

−3

= 0.0036 meters

So the final length is:

L = L0 + delta L = 2 m + 0.0036 m = 2.0036 ml = l

0

na

+ΔL=2m+0.0036m=2.0036m

Linear expansion is the rate of increase in length of a solid sample per unit rise in temperature. If the length of the sample increases from l1 to l2 as the temperature increases by θ°, the expansion (α) is given by

l2 = l1(1 + αθ). This relationship assumes that α is independent of temperature.

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Answer:

mass of that object is = 30 × 29 = 870N

The tension force the climber is applying to the rope is 926.34 N.

The magnitude of strain (T) is the same for both ropes when the angles of suspension () are the same for two ropes. Use the equation 2T sin() = m g to calculate the tension, where m g is the weight of the suspended item.

To calculate the tension force, we can use the expression shown below:

Tension force = (mass * acceleration) + weight

We can apply the following kinetic equation to determine the climber's upward acceleration:

v = u + at

where the end speed is 2.9 m/s, the starting speed is 0 m/s, the acceleration is a, and the time is t. (5.9 s).

When we rearrange this solution to account for a, we obtain:

a = (v - u) / t

a = (2.9 m/s - 0 m/s) / 5.9 s

a = 0.492 m/s²

We can now enter the numbers into the first equation as follows:

Tension force = (mass * acceleration) + weight

Tension force = (63 kg * 0.492 m/s^2) + (63 kg * 9.81 m/s²)

Tension force = 308.91 N + 617.43 N

Tension force = 926.34 N

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Given the data from the question, the heat gained by the water, the rate of energy transfer and the initial temperature of the iron are:

A. The energy gained by the water is 37656 J

B. The average rate of energy transfer from

the iron sphere to the water is 125.52 J/s (Watts)

C. The initial temperature of the iron

sphere is 65.4° C

Q = MCΔT

Q = 3000 × 4.184 × 3

Q = 37656 J

Power = energy / time

Power = 37656 / 300

Power = 125.52 J/s (Watts)

Q = CT

37656 = 576 × T

Divide both side by 576

T = 37656 / 576

T = 65.4° C

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Answer:

Internal energy is the microscopic energy contained in a substance, given by the random, disordered kinetic energy of the molecules. In addition it includes the potential energy between these molecules, and the nuclear energy contained in the atoms of these molecules

Answer:

Internal energy, in thermodynamics, the property or state function that defines the energy of a substance in the absence of effects due to capillarity and external electric, magnetic, and other fields.

Explanation:

Answer:

I may be correct but the answer i got was 55.31

Explanation:

Hope this helps- Good luck! ^w

The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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Answer:

in case of a car crash they will prevent you from flying out of your seat (not litteraly) and keep you safer than what you would be without them!

Explanation:

to keep you safe (simple answer lol)

The fraction of the total energy that is in the form of kinetic energy when the block is at position x = 21A is 441/2 or approximately 8/3. The correct option is B.

The total energy of the simple harmonic motion is given by

E = 1/2 k A^2

where k is the spring constant and A is the amplitude.

At position x = 21A, the block has a displacement of 21A from the equilibrium position. The potential energy at this position is given by:

U = 1/2 k (21A)^2

The kinetic energy at this position is given by:

K = E - U = 1/2 k A^2 - 1/2 k (21A)^2 = 1/2 k A^2 (1 - 441) = -220.5 k A^2

Since the kinetic energy is always positive, we can take the absolute value of K:

|K| = 220.5 k A^2

The fraction of the total energy that is in the form of kinetic energy is given by:

|K|/E = 220.5 k A^2 / (1/2 k A^2) = 441

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Answer:

Cells carry out functions that maintain life.

Living things are nde of one or more cells.

Explanation:

1) cells are building blocks of life. Cells make up tissues, tissues make up organs, organs make up organ systems...

2)microorganisms like bacteria are unicellular which means made of one cell. Human beings however are made of trillions and trillions of cells.

The motor could  lift 15 g in a time of 8 seconds 10884 meter.

The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.

Given that motor operates at 200 W.

At time interval of 8 second, it do a work = 200×8 joule = 1600 joule.

Hence,  it lift 15 g in a time of 8 seconds = 1600/(0.015×9.8) meter

= 10884 meter.

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The total change in the thermal energy of the slide and the seat of the child's pants is 31.5 J.

Thermal energy is the energy that exists in the form of heat energy. It is energy that is generated by the movement of atoms and molecules, and can be generated in a variety of ways, including through friction, chemical reactions, and the absorption of electromagnetic radiation. Thermal energy is a form of potential energy, meaning that it can be converted into different forms of energy, such as kinetic energy.

The total change in the thermal energy of the slide and the seat of the child's pants can be calculated by using the formula:
Change in thermal energy = mass x specific heat capacity x change in temperature
Therefore, the total change in the thermal energy of the slide and the seat of the child's pants is:
Change in thermal energy = 15 kg x 4.2 J/g*K x (½ x 3.0 m/s2) = 31.5 J.

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The value of the unknown capacitor in the LRC circuit is approximately 1.08 x 10^-8 F.

The resonant frequency of an LRC circuit is given by the formula:

f = 1/(2π√(LC))

Where f is the resonant frequency, L is the inductance, and C is the capacitance.

In this problem, we are given the following values:

R = 900 Ω

L = 9.00 H

f = 1000 Hz

We can rearrange the formula to solve for C:

C = 1/(4π^2f^2L) - R^2/L

Substituting the given values into the formula, we get:

C = 1/(4π^2 x 1000^2 x 9.00) - 900^2/9.00

C = 1.08 x 10^-8 F

Therefore, the value of the unknown capacitor in the LRC circuit is approximately 1.08 x 10^-8 F.

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Compared with angle theta, the angle of refraction of the ray emerging from plate y into the air will be greater than the angle of incidence because the refractive index of the glass is greater than that of air.

When a light ray passes through a glass slab of given thickness, the deviation is primarily dependent on the angle of incidence (angle i), the angle of refraction (angle r), and the thickness of the glass slab t. The angle of refraction of the ray emerging from plate y into the air will be greater than the angle of incidence because the refractive index of the glass is greater than that of air.

When a light beam passes from a medium with a high refractive index to a medium with a low refractive index, it is refracted away from the normal. When light travels from air to glass, the speed decreases and the direction changes. Since the refractive index of air is lower than the refractive index of glass, the angle of refraction will be greater than the angle of incidence. Therefore, the angle of refraction will be greater than the angle of incidence as the light passes from glass to air.

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Answer:yess

Explanation:as weather balloons travels from the earth's surface, the air pressure around ballons decreases slowly.As the air gets thinner,the gallons casing gets tighter.

This is due to gas expanding within balloon.The expanding gas causes the balloons to reach maximum height and it burst.

The gravitational force between the asteroids is 2.7 × 10^-10 N.

Newton's universal law of gravitation states that the force of attraction between any two bodies is inversely proportional to the square of the distance between them and directly proportional to the product of their masses.

Given that:

Two asteroids with masses 3.45 x 10^3 kg and 6.06 x 10^4 kg are separated by a distance of 7,200 m.

Hence, the gravitational force between the asteroids:

F = GmM/r²

= ( 6.67 x 10^-11 × 3.45 x 10^3 × 6.06 x 10^4)/( 7,200)² N

= 2.7 × 10^-10 N.

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Answer:

B 2.69 x 10-10 N

Explanation:

test right yes yes

Rank of the given planets from left to right based on their distance from the Sun, from closest to farthest is Earth, Jupiter, Saturn, Uranus, Neptune

The four Jovian planets in our solar system (Jupiter, Saturn, Uranus, and Neptune) can be ranked from left to right based on their distance from the Sun. The leftmost image in the provided pictures shows Earth, which is the third planet from the Sun. The other inner planets (Mercury and Venus) are not shown.

The next planet in the row is Jupiter, followed by Saturn, Uranus, and Neptune. Since the jovian planets are farther from the Sun than the inner planets, they are arranged in order of their increasing distance from the Sun. Therefore, the four Jovian planets can be ranked from left to right as Jupiter, Saturn, Uranus, and Neptune.

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The given question is incomplete, the complete question is:

The following images show Earth and the four Jovian planets of our solar system. Rank these planets from left to right based on their distance from the Sun, from closest to farthest

Answer:

because the car needs gas so why wouldnt it stop working

Explanation:

He's accelerating at 3 m/s² .  That means his speed is increasing by 3 m/s every second.At the end of 8 seconds, his speed is (8 x 3 m/s)  =  24 m/s .He's been moving south for the whole 8 seconds.So at the end of that time, his velocity is                          24 m/s south .

The acceleration experienced by the crate is approximately 0.844 m/s

Weight of the crate:

Weight = mass × acceleration due to gravity

Weight = 114 kg × 10 m/s^2

Weight = 1140 N

Force of friction:

Force of Friction = coefficient of friction × normal force

Force of Friction = 0.541 × 1140 N

Force of Friction ≈ 616.74 N

Net force:

Net Force = Applied Force - Force of Friction

Net Force = 713 N - 616.74 N

Net Force ≈ 96.26 N

Acceleration:

Acceleration = Net Force / mass

Acceleration = 96.26 N / 114 kg

Acceleration ≈ 0.844 m/s

Therefore, the acceleration experienced by the crate is approximately 0.844 m/s

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Objects of the same volume can have different masses due to variations in their **density**.

Density is defined as mass per unit volume and represents how much mass is packed into a given volume. If two objects have the same volume but different densities, their masses will differ.

For example, consider two cubes of the same size, but one is made of iron and the other is made of aluminum. Iron is denser than aluminum, which means that for the same volume, the iron cube will have more mass compared to the aluminum cube.

The density of an object depends on its composition, arrangement of particles, and the forces acting between them. Different materials can have different densities due to variations in their atomic or molecular structure.

Therefore, even though objects may occupy the same volume, their masses can differ if their densities vary. It is the density of the material that determines how much mass is contained within a given volume.

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The change in gravitational potential energy of the ball is approximately 7.0 kg m²/s² when it is lifted off the floor a distance of 1/7 m.

The change in gravitational potential energy of an object is given by the formula ΔPE = mgh, where ΔPE represents the change in potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the change in height.

In this case, the mass of the ball is 5.0 kg and the change in height is 1/7 m. The acceleration due to gravity, g, is approximately 9.8 m/s².

To calculate the change in gravitational potential energy, we can plug in the values into the formula:

ΔPE = (5.0 kg) x (9.8 m/s²) x (1/7 m)

Simplifying the expression:

ΔPE = (5.0 kg) x (9.8 m/s²) x (1/7 m)
   = (5.0 x 9.8 / 7) kg m²/s²

Calculating the value:

ΔPE ≈ 7.0 kg m²/s²

Therefore, the change in gravitational potential energy of the ball is approximately 7.0 kg m²/s².

Conclusion in one line:
The change in gravitational potential energy of the ball is approximately 7.0 kg m²/s² when it is lifted off the floor a distance of 1/7 m.

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Natural gas was the largest source about 38% of U.S. electricity generation in 2021. Natural gas is used in steam turbines and gas turbines to generate electricity.