Explain what cell theory is. Describe the history behind cell theory and the
scientists who were involved in forming the theory

The weight has no kinetic energy at the top of the lift when it is overhead because it is briefly immobile. Potential energy makes up the entirety of the system's energy. As the weight increases, the kinetic energy will rise.

The potential energy of  system increases by an amount equal to  work done against gravity, which is provided by the product of the weight,  height, and the acceleration due to gravity, when a person lifts a 95 kg weight to a height of 2.13 m. The potential energy gained by the weight in this instance is provided by:

Potential energy = weight x height x gravity

Potential energy = 95 kg x 2.13 m x 9.81 m/s^2

Potential energy = 1951.66 Joules

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While it is true that a dentist can use a special light during a teeth whitening procedure, it is not the light that actually changes the color of the teeth.

The light is simply a catalyst that activates a chemical reaction in the whitening gel or solution that is applied to the teeth.

Most teeth whitening products use a peroxide-based gel or solution, which breaks down into water and oxygen ions when it comes into contact with the teeth.

These oxygen ions then penetrate the enamel and dentin of the teeth, breaking apart the chemical bonds that cause tooth stains and discoloration.

The process of whitening teeth can take several treatments, with the use of a special light during each treatment to help speed up the chemical reaction.

So, in short, it is not the light itself that changes the color of Jayden's teeth, but rather the chemical reaction that is activated by the light.

Answer:

true

Explanation:

PLS MAKE ME AS BRAINLIST

Answer: The Answer is B. It is directed inward, toward the center of a circle.

Explanation:

Explanation:

It is given that,

A car travels 14 km due west, then does a U-turn and travels 43 km due east (when it takes U-turn, it will change direction from west to east)

i. Total distance = total path covered

= 14 km + 43 km

= 57 km

ii. Let east is positive and west is negative.

Displacement = final position-initial position

= 43-14

= 29 km

iii. If time taken in the entire trip = 3.2 hours

Average speed = distance/time

\(s=\dfrac{57\ km}{3.2\ h}\\\\=17.81\ km/h\)

1 km/h = 0.2777 m/s

17.81 km/h = 4.94 m/s

iv. If time taken in the entire trip = 2.5 hours

Average velocity = displacement/time

\(v=\dfrac{29\ km}{2.5\ h}\\\\=11.6\ km/h\)

1 km/h = 0.621 mph

11.6 km/h = 7.2 mph

Henc, this is the required solution.

A current loop can be used to determine the presence of a magnetic field in a given region of space by measuring the induced electromotive force (emf) generated by the changing magnetic field.

Electromotive force (EMF) is the electrical energy produced by a source of energy such as a battery or generator. EMF is measured in volts and is the electrical potential that drives the current in an electrical circuit. The magnitude of the force is determined by the amount of energy that is being converted from one form to another. For example, a battery will convert chemical energy into electrical energy and the EMF is determined by the amount of energy that is being converted. This EMF is what powers electrical devices and is a measure of the potential energy that can be used. EMF can also be produced by the movement of charged particles such as when an electric current is produced through a wire. EMF can also be induced in a coil of wire when a magnetic field is placed near the coil.

A current loop can be used to determine the presence of a magnetic field in a given region of space by measuring the induced electromotive force (emf) generated by the changing magnetic field. This can be done by connecting a galvanometer to the current loop and then moving it around the region of space in question. If a magnetic field is present, the induced emf in the current loop will cause a deflection in the galvanometer, indicating the presence of a magnetic field.

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The resulting velocity of the 500-g cart is 0 m/s. The resulting velocity of the 1000-g cart is 1 m/s.

After three half-lives, 1/8 (or 0.125) of the parent isotope remains. Thus, 0.125 times the parent atoms. The daughter isotope would be equivalent to the remaining parent isotope, 0.125 times the original number of parent atoms.

After three half-lives, the parent isotope has exponentially decayed, forming the daughter isotope. Each half-life reduces the parent isotope by half and increases the daughter isotope. Three half-lives have passed, reducing the parent isotope to 1/8 of its initial level. The rock sample would have 1/8 of the parent isotope.

The daughter isotope would have accumulated during decay. After three half-lives, the daughter isotope would have reached 3/8 of the parent isotope as each half-life creates one-half of it. After three half-lives, the rock sample would have 1/8 of the parent isotope and 3/8 of the daughter.

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Each 480-volt, three-phase, wye-connected feeder disconnect with a minimum rating of 100 amperes is required to be ground-fault protected.

The Delta connection forms an equilateral triangle out of the coils and applies the various phases at each vertex. The Wye connection applies the various phases to the open ends while joining one end of each coil together. When power is delivered to these two connections, the outcomes are significantly different.

One of the most popular ways to start a three phase induction motor is with a Wye-Delta starter, often known as a Start Delta. The motor is started in the Wye configuration when using this method to start an induction motor.

Three transformer coils (windings) with WYE wiring The three coils are connected to one another in parallel. Each coil's amperage is equal to the amperage on each line. Phase Voltage between Hot and Neutral is same for each line.

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The ball reaches a maximum height of approximately 42.83 ft.  the ball lands at a horizontal distance of approximately 81.36 ft. he average value of f(x)= x³8 +9x on the interval is 10.5.

To determine the maximum height and horizontal distance traveled by the ball shot at an angle of 45 degrees with an initial velocity of 41 ft/sec and neglecting air resistance, we can use basic kinematic equations.

Maximum Height:

The maximum height reached by the ball can be calculated using the equation for vertical displacement:

y_max = (v₀² * sin²θ) / (2g),

where v₀ is the initial velocity, θ is the launch angle (45 degrees), and g is the acceleration due to gravity (32 ft/s²).

Plugging in the values, we get:

y_max = (41² * sin²45°) / (2 * 32) = 42.83 ft.

Therefore, the ball reaches a maximum height of approximately 42.83 ft.

Horizontal Distance:

The horizontal distance traveled by the ball can be calculated using the equation for horizontal displacement:

x = v₀ * cosθ * t,

where x is the horizontal distance and t is the time of flight.

Since the ball goes up and then comes back down, the total time of flight can be calculated as:

t_total = 2 * (v₀ * sinθ) / g.

Plugging in the values, we get:

t_total = 2 * (41 * sin45°) / 32 ≈ 2.88 s.

Using this total time, we can find the horizontal distance:

x = 41 * cos45° * 2.88 ≈ 81.36 ft.

Therefore, the ball lands at a horizontal distance of approximately 81.36 ft.

Moving on to the second question:

To find the position of a particle at time t = 14, given its acceleration, initial position, and initial velocity, we can use the equations of motion.

The position function s(t) can be obtained by integrating the acceleration function twice with respect to time. Since the given acceleration is a linear function, we have:

s(t) = (1/6)at³ + (1/2)v₀t² + s₀,

where a is the acceleration, v₀ is the initial velocity, and s₀ is the initial position.

Plugging in the given values, we get:

s(14) = (1/6)(24)(14)³ + (1/2)(15)(14)² + 12 ≈ 546.67.

Therefore, the position of the particle at time t = 14 is approximately 546.67.

Lastly, for the average value of f(x) = x³ + 9x on the interval [1, 2], we can use the formula for the average value of a function on an interval:

Average value = (1 / (b - a)) * ∫[a, b] f(x) dx,

where [a, b] represents the interval.

Plugging in the values, we have:

Average value = (1 / (2 - 1)) * ∫[1, 2] (x³ + 9x) dx.

Evaluating the integral, we get:

Average value = (1 / 1) * [(1/4)x⁴ + (9/2)x²] evaluated from 1 to 2,

Average value = (1/4)(2⁴ + 9(2²)) - (1/4)(1⁴ + 9(1²)),

Average value = (1/4)(16 + 36) - (1/4)(1 + 9),

Average value = (1/4)(52) - (1/4)(10),

Average value = 13 - 2.5,

Average value ≈ 10.5

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Answer:

d

Explanation:

A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil up and down. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced upwards and downwards. In this case, the particles of the medium move perpendicular to the direction that the pulse moves. This type of wave is a transverse wave. Transverse waves are always characterized by particle motion being perpendicular to wave motion.

A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil left and right. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced leftwards and rightwards. In this case, the particles of the medium move parallel to the direction that the pulse moves. This type of wave is a longitudinal wave. Longitudinal waves are always characterized by particle motion being parallel to wave motion.

Answer:

4 J

Explanation:

From the image attached, we can see 2 horizontal forces acting on the box albeit in opposite directions.

Now, the net force will be;

F_net = 3 - 1

F_net = 2 N

To move a distance of 2 metres, kinetic energy is;

K.E = Force × Distance = 2 × 2 = 4 J

The formula for calculating density is expressed as

Density = mass/volume

From the information given,

mass of empty pycnometer = 10.2

mass of the same pycnometer with an unknown liquid is 21.8.

Mass of unkown liquid = 21.8 - 10.2 = 11.6

volume of unknown liquid = 7

Thus,

Density = 11.6/7

Density = 1.7 g/ml

The distance horizontally, from the initial dropping point that the pit hit the ground is 11.2 meters.

The formula of distance is Distance = Speed x Time which is measured in meters.

7. The height of the car window h = 5.0 metres

The velocity of the car is 35 m/s.

The horizontal velocity of the cherry pit when it is released is then the same as that of the car Vx = 35m/s

The dropped cherry pit falls freely under gravity with a vertical downward acceleration equal to the acceleration due to gravity, g

Initially, the pit has no vertical component of velocity.

Therefore the time it takes to reach the ground t = \(\sqrt{} \frac{2h}{g}\)

t = √10/9.8

t= 0.32 seconds

The horizontal component of velocity is a constant, since there are no forces acting in the horizontal direction.

Therefore the horizontal distance travelled by the pit by the time it hits the ground is Vx * time

= 35 x 0.32

= 11.2 meters

attached is a picture of the situation above, where Vx = 35m/s

h = 5.0 meters

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The element (A) F (fluorine) doesn't have similar chemical properties to neon (Ne).

The noble gases comprise a group of the periodic table, consisting of six chemical elements: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). The noble gases are the chemical elements that are the least reactive.

They are the lightest and have the smallest atomic radii of any element in their respective periods. Their non-reactivity makes them very useful in a wide range of applications. They are used in lighting, cryogenics, as pressurized gases for spacecraft propulsion, and in the semiconductor industry. The noble gases are located in the last column of the periodic table. The number of electrons in their outermost shell (the valence shell) is the same as the group number.

For example, helium and neon have two valence electrons, and argon has eight. Fluorine, represented by F on the periodic table, is a chemical element with the atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As a member of the halogen group, it is a highly reactive element. Therefore, the option (A) F (fluorine) is not a noble gas and doesn't have similar chemical properties to neon (Ne).

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The thermometer measures the starting temperature as,

The temperature required for the boiling the water is

(a). The temperature requires to boil is,

They have a limited supply in nature, therefore if they are used excessively, they will become exhausted.

Today, we recognise that using fossil fuels has a negative impact on the environment. Fossil fuels produce and utilise local pollutants, and their continued use permanently alters the temperature of our entire world.

Wastes from combustion sources are those that result from carbon pollution (i.e., coal, oil, natural gas). Included in this are all ash and particles taken out of the flue gas.

The fossile fuel is limited in nature. So, it should not waste energy from fossil fuels.

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To calculate the vertical displacement as the object exits the plates, we once more use the kinematic equations.2.73 106 m is the size of the vertical displacement.

The electron experiences an upward force as it moves between the charged plates and narrowly avoids striking the top plate.It barely misses the tongs as it rises by a minuscule inch.

The electron narrowly escapes impacting the top plate as it travels between the charged plates and feels an upward pull. It travels 0.005 meters in the y direction.

vn = 1.60 x108 The electron is travelling at a speed of 2 m in the direction of x.

Time of flight is calculated as t = d/ v, where d is the distance and v is the speed.

t=2m/ 1.60×10⁸ms⁻¹ =1.25×10⁻⁸s

The y-velocity is initially zero.

Currently, an is displacement and y=vnt + 1/2 at2

So, 0.005m= 1/2 a(1.25×10⁻⁸s)

a=6.40×10¹³ ms⁻²

Additionally, a= F/m = eE/m.

E= (9.1×10⁻³² kg)(6.40×10¹³ ms⁻²)

1.60×10⁻¹⁹ C

=364NC⁻¹

Due to its slower acceleration and higher mass, the proton won't hit any plates.To calculate the vertical displacement as the object exits the plates, we once more use the kinematic equations.

y = 1/2at2 = 1/2 eE/mp (1.25 10 8 s)2 = 2.73 10 6 m

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Answer:

40g

Explanation:

Mass = density x volume

= 2 x 20

= 40g

Answer:

m =  V × ρ

=  20 milliliter × 2 gram/cubic meter

=  2.0E-5 cubic meter × 2 gram/cubic meter

=  4.0E-5 gram

=  4.0E-8 kilogram

Explanation:

The density of a material, typically denoted using the Greek symbol ρ, is defined as its mass per unit volume.

ρ =    

m  

V

           where:

ρ is the density

m is the mass

V is the volume

The calculation of density is quite straightforward. However, it is important to pay special attention to the units used for density calculations. There are many different ways to express density, and not using or converting into the proper units will result in an incorrect value. It is useful to carefully write out whatever values are being worked with, including units, and perform dimensional analysis to ensure that the final result has units of mass  volume. Note that density is also affected by pressure and temperature.

Energy refers to the ability or capacity to do work. Energy can be of various types as follows:

Kinetic energy is energy possessed by an object because of its motion while potential energy is energy possessed by an object because of its position or its condition.

The law of conservation of energy states that energy cannot be created nor destroyed but can only be transformed i.e. converted from one form to another.

Friction is a force that resists the relative motion or tendency to such motion of two bodies in contact.

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Answer: velocity is the study of how fast an object changes its place, or is displaced.

Explanation: An example would be how fast a basketball reaches the other side of a gym, the acceleration and speed are measured and calculated to find velocity

Answer:

1)the planet would need to have a source of energy that bacterial life can exploit, as well as a standing source of liquid water. At its surface, the temperature of Neptune dips down to 55 Kelvin. That's very cold, and there's no way liquid water could exist.

2)Neptune has the wildest and strangest weather in the entire Solar System. It has huge storms with extremely high winds. Its atmosphere has dark spots which come and go, and bright cirrus-like clouds which change rapidly. Neptune has an average temperature of -353 Fahrenheit (-214 Celsius).

3)To find life on Neptune, the planet would need to have a source of energy that bacterial life can exploit,

If we say that the potential at the earth's surface is 0 v , the potential 1.6 km above the surface is  - 6.2 × 10^6 V.

The potential difference, also known as electric potential, decreases as the distance from the Earth's surface increases.

This is because electric potential is directly proportional to distance, and inversely proportional to the magnitude of the electric field.

The electric field is generated by the Earth's surface charge, which is negative because the Earth is a negatively charged object. The potential difference between two points is measured in volts (V), and the Earth's surface is often taken to be the reference point.

If the potential at the Earth's surface is taken to be 0 V, the potential 1.6 km above the surface can be calculated as follows:

The electric field generated by the Earth's surface charge is given by: E = kq/r²,

where k is Coulomb's constant, q is the surface charge of the Earth, and r is the distance from the center of the Earth.

The potential difference between two points is given by: V = Ed,

where d is the distance between the two points.

Thus, the potential at a point 1.6 km above the Earth's surface is:

V = E × d = kq/r² × d = (9 × 10^9 N·m²/C²) × (- 5.52 × 10^5 C)/[(6.38 × 10^6 m + 1.6 × 10^3 m)²] × (1.6 × 10^3 m)

= - 6.2 × 10^6 V.

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The impulse applied to the driver by the seatbelt, assuming he follows the same motion as the car is 1890 N sec.

In order to change the momentum of an object, you must exert a certain amount of force over a specific period of time. For example, when you hit a ball with a cricket bat, you apply a force for a time to cause a change of momentum in the ball.

A resultant force causes an acceleration and a change in the velocity of a body as long as the body is acting on it. Therefore, a net force applied over a long period of time produces a larger change in linear momentum than the same force applied for a short period of time.

Impulse is often stated to be the product of the mass and velocity of the object. The equation for impulse is given as,

J = m* v = 70* 27 = 1890 N sec

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Answer:

2.5

Explanation:

A rabbit is trying to cross the street. Its velocity v as a function of time t is given in the graph below where rightwards is the positive velocity direction 2.5 m.

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.

Rabbit displacement is 2.5 m.

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Answer:

A

Explanation:

Answer:

Answer A-93

Explanation: