sea levels 18,000 years ago were approximately 100 m (330 ft) lower than they are today. question 53 options: true false

Answer:

1. When a substance is heated, the particles gain energy and move apart increasing the volume. This phenomenon is called thermal expansion.

2. When temperature increases, average kinetic energy increases.

Explanation:

Thermal expansion - the tendency of matter to change in volume in response to a change in temperature.

When the temperature of an object increases, the average kinetic energy of its particles increases while, when the average kinetic energy of its particles increases, the object's thermal energy increases.

The thermal energy of an object therefore increases as its temperature increases.

Answer:

1) Acids have a sour taste , Bases have a bitter taste.

2) Acids turn blue litmus paper into red , Bases turn red litmus paper into blue.

3) Acids react with most metals to form Hydrogen gas but only a few base react with a few metals to form Hydrogen gas

4) Both will conduct electricity. Both acids & bases are good electrolytes. Strong acids & bases conduct more electricity than that of weak acids & bases

Fill in the blanks with the properties of acids and bases as follows:

The properties of acids are as follows:

Therefore, fill in the blanks with the properties of acids and bases are well described above.

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Given:

Thermal energy is denoted by W

Chemical energy is denoted by X

Electrical energy is denoted by Y

Kinetic energy is denoted by Z

To find the order of energy while converting bagasse to electricity.

Explanation:

The bagasse has chemical energy stored in it.

The bagasse is burned, so chemical energy gets converted into thermal energy.

The thermal energy gets converted into kinetic energy.

The kinetic results in the motion of electrons.

Thus, producing electrical energy.

Hence, the conversion order is XWZY

Answer:

Transition has to cross between solid and liquid in gray zone.No indoor organized public events and social gatherings are allowed, except with members of the same household.

The coefficient of static friction is usually larger than the coefficient of kinetic friction, meaning it takes more force to get an object moving than to keep it moving.

For most surfaces, the coefficient of static friction is greater than the coefficient of kinetic friction.

The coefficient of static friction is the amount of force required to move an object that is initially at rest relative to a surface. This force is usually greater than the force required to keep the object moving, which is the coefficient of kinetic friction. This is because the static force must overcome the resistance of the surface, while the kinetic force is used to maintain the object's relative motion. This is why it takes more effort to start an object moving than to keep it going.

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a)the maximum magnitude of the magnetic force this particle can experience is  1.44 x 10⁻¹² N

b) the minimum magnitude of the magnetic force this particle can experience is 0 N

Since we are given the magnetic field which 1.50, considering v to be the velocity  at which the electron moves in the electric  field

Since we know

Vq = 1/2 m v²

where g is the charge of the particle,  V is  the potential difference, m is the mass of the particle and v is the velocity

Putting the given values in the formula, we get

=>103* 1.6 x 10⁻¹⁹= 1/2* 9.1 x 10⁻³¹ * v²

=> v²= 103* 1.6 x 10⁻¹⁹/ 0.5* 9.1 x 10⁻³¹

=>v² = 3.621 x 10¹³

=> v= 6.017 x 10⁶ m/s

the electron will  experience a maximum  force when it is moving in perpendicular with respect to the magnetic field  

so F=Bqv, where B is the magnetic field, q is the charge of the particle and v is the velocity.

F=  1.50*  1.6 x 10⁻¹⁹* 6.017 x 10⁶

= 1.44 x 10⁻¹² N

The minimum force will  be zero, as the electron moves along the direction of the magnetic field

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The average velocity of the car for the entire trip is 0.018 km/h.

The velocity of the trip is determined from the ratio of change of displacement to total time of motion.

The total displacement of the motion = ( 30 m North -  30 m South) + 40 m est = 40 m west = 0.04 km west

The total time of motion = 2.22 hours

The average velocity of the car for the entire trip is calculated as follows;

v = ( 0.04 km ) / ( 2.22 hrs )

v = 0.018 km/h

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Answer:

B

Explanation:

the 3 electrons makes it neutral

Answer:

B

Explanation:

For neutral atoms, the number of protons equal the number of electrons.

Thus, a neutral atom of lithium will have 3 electrons outside the nucleus.

Answer:

10 m/s

Explanation:

Answer:

4 times as far

Explanation:

It is kinda hard but this equation should explain x−x0=v0v0a0−a0v202a20=v202a0 so 4 times (and if you would have been going 3 times as fast it would be 9 times as far...)

Answer:

The car would have skidded 4 times as far if it had been traveling twice as fast.

On Mars, gravity is about 40% less powerful than it is on Earth. The typical temperature of Mars is lower than that of Earth, therefore if you took a regular red brick there, you wouldn't find it very warm.

It is identical. If two objects are sufficiently enough apart from one another, the gravitational pull between them is equal and is thought to be directed toward the center of gravity of each item.

Because Newton's third rule combines these two forces, you would exert a force on the earth that is equivalent to the force the earth imposes on you. So that the person can feel the effects of gravity, we can.

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Answer:

They subtract the atomic number from the atomic mass

Hope this helps

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Answer:10-11 watt-seconds.

Explanation:Nuclear reactions liberate a large amount of energy compared to chemical reactions. One fission event results in the release of about 200 MeV of energy, or about 3.2 ´ 10-11 watt-seconds.

With the use of the second equation of motion formula, the speed the car travelled when the rockets were fired is 12 m/s.

Linear motion depicts movement in a straight line. While speed is the distance travelled per time taken.

Given that In a test run, a rocket-powered car is driving down a test track at a constant speed when the rockets are fired. it then accelerates at 4 m/s2 for 8.0 s covering a distance of 224 m.

The given parameters are;

The speed the car travelled when the rockets were fired can be calculated by using the below formula

s = ut + 1/2a\(t^{2}\)

Substitute all the parameters into the formula

224 = 8u + 1/2 x 4 x \(8^{2}\)

224 =8u + 2 x 64

224 = 8u + 128

224 - 128 = 8u

8u = 96

u = 96/8

u = 12 m/s

Therefore, the speed the car travelled when the rockets were fired is 12 m/s.

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The focus point on your lens is on a subject 20 feet away from the camera. An object 5 feet away from the camera is the closest thing in focus, the farthest point from the camera in focus is 105 feet.

The distance between the object closest to the camera (near point) is 5 feet.

Therefore, the focal length of the lens is:

f = D1 = 5 feet

The distance between the object that is in focus (far point) and the lens (D2) is:

D2 = 20 feet

So, by the lens formula, 1/f = 1/D1 + 1/D2

Now, substituting the values, we get:

1/5 = 1/D2 + 1/20

Multiplying by 100D2, we get:

20 = 100D

2/5 + 5D2/5= (100 + 5)D2/5= 105D2/5

Hence, the farthest point from the camera in focus is 105 feet.

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Answer:

D) The contraction of objects in space

Explanation:

A) Expansion of the universe as originated from the Big Bang is an important evidence, as B) the Cosmic microwave background which is thought to be left over from the Big Bang. The right proportion of hydrogen and helium as unprocessed material that has been detected as the basic elements from where the universe started.

The only out of context option is option D

According to the research, the correct option is A. A psychologist whose goal is to explain a behavior will record descriptions as objectively as possible.

It is a professional who diagnoses and is responsible for collecting facts about the behaviors and experiences of living beings, organizing them in a systematic way and developing theories for their understanding.

This means that psychologists analyze the behavior of living beings from a scientific approach and these studies allow us to explain their behavior.

Therefore, we can conclude that according to the research, the correct option is A. A psychologist whose goal is to explain a behavior will record descriptions as objectively as possible.

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Answer:

The answer is the fourth option

Explanation:

For everyone on edg3, it is D) suggest why a behavior occurs.

The statement that is true is: "The higher the velocity of a projectile, the larger the cavity it produces."low-velocity injuries produce extensive temporary wound channels. there are four levels of velocity.

A projectile is an object that is thrown, launched, or shot through the air and travels in a parabolic path under the influence of gravity. It can be a solid, liquid, or gas and can be propelled by various means such as a gun, bow, and arrow, or even by throwing with one's own body. The trajectory of a projectile is determined by its initial velocity, angle of projection, and the force of gravity acting upon it. Understanding the principles of projectile motion is important in a variety of fields, such as engineering, physics, and sports. Projectile motion is also affected by air resistance and other external factors, making it a complex area of study.

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The vertical curvature (radius of curvature) of the road is approximately 1370.6 meters. To solve this problem, we can follow these steps:

Step 1: Identify the given information

- Speed of the car (v) = 45 m/s

- Apparent weight increase = 15%

Step 2: Calculate the increase in gravitational force

Since the occupants' apparent weight is 15% higher,

the additional force acting on them can be calculated as 0.15 times the gravitational force (g), which is approximately 9.81 m/s^2.

- Additional force = 0.15 * 9.81 m/s² = 1.4715 m/s²

Step 3: Determine the centripetal acceleration
The additional force acting on the occupants is due to the centripetal acceleration (a_c) caused by the curvature of the road.

The centripetal acceleration can be calculated using the formula:

- a_c = v² / r, where r is the radius of curvature of the road.

Step 4: Calculate the radius of curvature

Rearrange the centripetal acceleration formula to find the radius of curvature

(r):- r = v² / a_c

Step 5: Substitute the values and calculate r

- r = (45 m/s)² / 1.4715 m/s²

- r ≈ 1370.6 meters

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If the speed of the car decreases while it travels around a curve, the magnitude of the centripetal force required to keep the car moving in a circular path will also decrease.

The centripetal force is directly proportional to the square of the speed and inversely proportional to the radius of the curve. Therefore, as the speed decreases, the centripetal force required to maintain the car's circular motion decreases as well.

The centripetal force required to maintain the car's circular motion depends on two main factors: the car's speed and the radius of the curve. According to the centripetal force equation, Fc = (mv^2) / r, where Fc represents the centripetal force, m is the mass of the car, v is the speed of the car, and r is the radius of the curve.

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Answer:

Explanation:

Work = W = Fd = (80 N)(2 m) = 160 J

Power = P = W/t = (160 J) / (4 s) = 40 W  (watts)

Answer:

23 m/s

Explanation:

Think

Answer:

reaches a higher temperature is LEAD.

Explanation:

In this exercise we have a calorimeter problem, in which the initial energy is absorbed by each body

       E₀ = m c_e ΔT

where E₀ = 5000 J

       ΔT = \(\frac{E_o}{m \ c_e}\)

the specific heats for each material are tabulated

      material   c_e (J / kg ºC)

     glass           837

     copper       387

     lead            128

     gold            129

As they indicate that the mass of the materials is the same, the one with the greatest temperature difference is the one with the least specific heat, consequently the one that reaches a higher temperature is LEAD.

let's calculate for a mass of 1 kg

glass

       ΔT = 5000/(1 837)

       ΔT = 6ºC

Lead

       ΔT = 5000/(1 128)

       ΔT = 39.1º

GOLD

       ΔT = 5000/(1 129)

       ΔT = 38.8º C

Some of the coal's energy was turned into other forms of energy.

According to the first law of thermodynamics, energy can neither be created nor destroyed but is converted from one form to another. We know that from the first law of thermodynamics, the energy that originally in the coal does not  vanish into thin air but undergoes a conversion.

Thus, want to find out what accounts for the energy of the coal. Thus, we could say that some of the coal's energy was turned into other forms as this is in consonance with the first la of thermodynamics.

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The amount of charge that can be placed on a capacitor depends on the capacitance, which is determined by the area of each plate.

The capacitance of a capacitor is given by the formula:

C = ε0 * (A / d)

Where:

C is the capacitance,

ε0 is the permittivity of free space (a constant value),

A is the area of each plate,

d is the separation between the plates.

To determine the amount of charge, we can rearrange the formula as:

Q = C * V

Where:

Q is the amount of charge,

V is the voltage across the capacitor.

Given that the area of each plate is 7.3 cm², we can use this information to calculate the capacitance. However, the question does not provide the voltage or any other information required to calculate the amount of charge accurately. Without knowing the voltage or other relevant parameters, it is not possible to determine the exact amount of charge that can be placed on the capacitor.

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Answer:

The molecules of the soup in the pot move faster than those in the freezer.

Explanation:

The soup in the freezer is closer to being a solid than that in the pot. Therefore, it has more energy which will make the molecules move faster.

The formation of freezing rain involves the snow passing through a fairly thick layer of above freezing air before passing through a thin layer of subfreezing temperatures near the surface. Therefore, option A is the correct answer.

Freezing rain is defined as rain that falls on subfreezing surfaces and freezes on contact, creating a coating of ice that can make sidewalks, roads, and other surfaces extremely slick.

The formation of freezing rain begins in the clouds, where snow forms as ice crystals. The crystals grow as they collide with one another, forming snowflakes. However, the flakes may not remain frozen as they fall to the ground; rather, they may melt and become raindrops.

The raindrops may re-freeze before hitting the ground, depending on atmospheric conditions.The formation of freezing rain is thought to occur when snow passes through a reasonably thick layer of above-freezing air before passing through a thin layer of subfreezing temperatures close to the surface.

When the snow hits the surface, it quickly freezes, creating a glaze of ice. When compared to sleet, freezing rain is distinct in that it forms as a liquid raindrop rather than a frozen one.

Therefore Option A is correct.

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