the speed of light in glass is group of ___answer choices: same as in a vacuum. smaller than that in air. unchanged from that in air. larger than that in air.

Answer:

C -) The friction between an object and air.

Explanation:

The frictional force is the force that exists between two surfaces in contact, which is opposed to the movement.

That is, this type of force exists as long as there is physical contact between surfaces.

While the other types of force always act at a separation distance between bodies.

Answer:

A

Explanation:

Answer:

The decay constant, or "lambda" (λ), is the rate at which a radioactive isotope decays. It is usually measured in units of inverse time, such as seconds. In this case, the decay constant can be calculated as follows:

16:42

λ = (ln(2)/3.57 x 106) x (5.78 x 1017) = 0.

Explanation:

Answer:It is a combination reaction; nitrogen and hydrogen combine to form ammonia

Explanation:

This is the reaction that is used to make ammonia from hydrogen and nitrogen. In this reaction, only one product is formed. Therefore, this reaction is known as a combination reaction.

(a) The average acceleration of this sprinter is 3.31 m/s².

(b) The time taken for the sprinter to reach the speed is 3.5 s.

The average acceleration of this sprinter is calculated as follows;

v² = u² + 2as

where;

v² = 0 + 2as

a = v² / 2s

a = ( 11.5² ) / ( 2 x 20 )

a = 3.31 m/s²

The time of motion of the sprinter is calculated as follows;

v = u + at

v = 0 + at

t = v / a

t = ( 11.5 ) / ( 3.31 )

t = 3.5 s

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The magnitude of the displacement vector refers to the length or amount of the displacement vector. Displacement is the change in position of an object. Displacement is a vector quantity, which means it has both magnitude and direction. In this question, a figure skater is gliding along a circular path of radius 3.93 m.

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It will take approximately \(4.86 * 10^{-8}\) seconds for the electron to pass through point (P) again.

To determine how long it will take for the electron to pass through point (P) again, we need to consider the relationship between the magnetic field, velocity, and the motion of a charged particle in a magnetic field.

The force experienced by a charged particle moving in a magnetic field is given by the equation:

F = qvB sin(theta)

Where:

F is the magnetic force,

q is the charge of the particle (in this case, the charge of an electron is -1.6 x 10^-19 C),

v is the velocity of the electron (2 x 10^5 m/s in this case),

B is the magnitude of the magnetic field (5.91 mT = 5.91 x 10^-3 T),

theta is the angle between the velocity vector and the magnetic field vector.

In this case, since the electron's velocity is purely horizontal and the magnetic field is directed vertically, the angle theta is 90 degrees, and sin(theta) = 1.

Therefore, the force acting on the electron is:

F = qvB

The force acting on the electron provides the necessary centripetal force for it to move in a circular path. The centripetal force is given by:

\(F = (mv^2) / r\)

Where:

m is the mass of the electron (9.11 x 10^-31 kg),

v is the velocity of the electron (2 x 10^5 m/s),

r is the radius of the circular path.

Setting the two equations equal to each other, we have:

\(qvB = (mv^2) / r\)

Simplifying and solving for r:

r = (mv) / (qB)

Substituting the given values, we get:

r = [(9.11 x 10^-31 kg) x (2 x 10^5 m/s)] / [(-1.6 x 10^-19 C) x (5.91 x 10^-3 T)]

Calculating the value of r, we find:

r ≈ 1.539 x 10^-2 m

The distance traveled by the electron in one complete circular path is equal to the circumference of the circle, which is 2πr.

Therefore, the time taken for the electron to pass through point (P) again is given by:

time = distance / velocity = (2πr) / v

Substituting the known values:

time ≈ (2π x 1.539 x 10^-2 m) / (2 x 10^5 m/s)

Calculating the value of time, we find:

time ≈ 4.86 x 10^-8 seconds

Hence, it will take approximately 4.86 x 10^-8\(4.86 * 10^{-8}\) seconds for the electron to pass through point (P) again.

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The time is taken for the particles to pass through point (P) with the magnetic field 5.91mT and the magnitude of 2×10⁵ m/s is 6.04ns.

The field around the magnet is called a magnetic field. The vector field describes the magnetic influence of moving charges, electric current, and magnetic field. The unit of the magnetic field is Tesla. When a magnet moves along a circular path, force is equal to centripetal force.

From the given,

magnetic field, B = 5.91T

electron's velocity, v = 2×10⁵ m/s

The magnetic force on the given charge, F=?

qVB = mv²/R

R/v = m/qB

time period, T= 2πR/v

T = 2π(R/v)

   = 2π(m/qB)

   = 2×3.14×9.1×10⁻³¹/(1.6×10⁻¹⁹×5.91×10⁻³)

   = 57.148×10⁻⁹/9.456

  = 6.04×10⁻⁹

Thus, the time period for electrons to pass through the point is 6.04ns.

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At the same time every day throughout the Lunar Cycle, the Moon will move farther (eastward, westward) in the sky. The Moon's highest point in the sky changes gradually throughout the day for an observer on Earth (earlier, later).

The illuminated shape of the Moon that we can see from Earth appears to be changing constantly as the moon makes its 28-day journey around the planet. As a result of us viewing varying amounts of the illuminated surface, the moon's shape appears to have changed.

An average lunar cycle, lunation, lunar month, or synodic month has a duration of 29.53059 days and is the period of time between one new Moon and the following. In terms of time, this equals 29 days, 12 hours, 44 minutes, and 3 seconds.

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Answer:

people's reactions and perceptions to stimuli.

Explanation:

Psychophysics can be defined as the scientific study of people's reactions and perceptions to stimuli.

Stimulus can be defined as an obvious change in either the chemical or physical structure of an organism' environment (either external or internal). Thus, all living organisms (humans) respond to changes in their environment and consequently, an appropriate response or reaction is made. Also, stimulus arising from within the organism is known as internal stimulus while those from its environment are known as the external stimulus.

In organisms, the specialized cells that detect stimulus are generally known as sensory receptors while a group of these receptors is referred to as sense organ.

Hence, psychophysics is a branch of psychology and it is typically focused on determining the effects of stimuli on the mental health or processes of humans.

Answer:

study of people's reactions and perceptions to a stimulus.

Explanation:

Before the emergence of psychology, psychophysics was the more common practice. Psychophysics is the study of people's reactions and perceptions to a stimulus. For example, when you hear a bell ring, do you act startled, blink your eyes, turn your head, or do nothing? Psychophysicists were interested in people's five senses and how those senses responded to stimulation from elsewhere. Tests were administered to people to try to understand mental phenomena.Psychophysicists wanted to know what people's reactions would be. For example, if a bell rang twenty times, how well did a person hear that sound and did the person find that sound pleasant?

Answer:

The value is \(t_1 = 9 \ s \)

Explanation:

Generally the velocity attained by the sled after t = 3.10 s is mathematically evaluated using the kinematic equation as follows

\(v = u + at\)

Here u = 0 \ m/s

a = 13.5 \(m/s^2\)

So

\(v = 0 + 13.5 * 3.10 \)

=> \(v = 41.85 \ m/s \)

The is distance it covers at this time is

\(s = u * t + \frac{1}{2} a * t^2\)

=> \(s = + \frac{1}{2} * 13.5 * 3.10^2\)

=> \(s =64.87 \)

Now when sled stops its the final velocity is \( v_f = 0 m/s \) while the initial velocity will be the velocity after its acceleration i.e \(v = 41.85 \ m/s \)

So

\(v_f = v + a_1t_1\)

Here  \(a_1 =  - 4.65\), the negative sign shows that it is deceleration

So

           \(0  =  41.85  - 4.65 *  t_1\)

=> \(t_1 = 9 \ s \)

The object distance of the lens is 10 cm and the image distance of the lens is 30 cm.

The object and image distance formed by the lens is calculated by applying the following lens formula.

v + u = 40 ------- (1)

v/u = 3 ------------ (2)

v = 3u

Substitute v into equation (1);

3u + u = 40

4u = 40

u = 40/4

u = 10 cm

The image distance = 3u

= 3 x 10 cm

= 30 cm

Thus, the object distance is 10 cm and the image distance is 30 cm.

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Answer: it would be daddy

Explanation:

Because I’m daddy

The process can be described as Photosynthesis with an equation \(6CO_{2} + 6H_{2}O - > C_{6}H_{12}O_{6} + 6O_{2}\).

What is Photosynthesis?

As a means of converting light energy into chemical energy, photosynthesis is a process used by plants and other living things. This chemical energy is then released through cellular respiration to power the activity of the organism.

The process of photosynthesis is how plants produce food. Plants use the energy of light during photosynthesis to produce food. Water and carbon dioxide are transformed by plants into the sugar glucose with the help of the sun's energy.

Two reactants—carbon dioxide and water—are used in the photosynthetic process. Both oxygen and glucose are produced by these two reactants. This makes the photosynthetic reaction an endothermic reaction.

According to the photosynthetic formula:

\(6CO_{2} + 6H_{2}O - > C_{6}H_{12}O_{6} + 6O_{2}\)

Therefore, the photosynthesis reaction can be described as:\(6CO_{2} + 6H_{2}O - > C_{6}H_{12}O_{6} + 6O_{2}\)

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We can think of it as photosynthesis with an equation.

\(6CO_{2} +6CH_2}-- > C_{6}H{12}O_{6} + 6CO_{2}\)

Plants and other living things employ the process of photosynthesis to transform light energy into chemical energy. The organism's activity is subsequently powered by the chemical energy that is then released during cellular respiration.

Plants produce food through a process known as photosynthesis. During photosynthesis, plants use the energy of light to create nourishment. With the aid of the sun's energy, plants convert water and carbon dioxide into the sugar glucose.

In the photosynthetic process, carbon dioxide and water are used as reactants. These two reactants result in the production of oxygen and glucose. Because of this, the photosynthetic reaction is endothermic.

The photosynthetic equation states:

\(6CO_{2} +6CH_2}-- > C_{6}H{12}O_{6} + 6CO_{2}\)

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Draw a diagram to visualize the situation:

The displacement of an object is the change in its position between the starting point and the endpoint of the trajectory. On the other hand, the distance is the length of the trajectory of the object.

In this case, the total displacement can be calculated adding 5km+4km noting that both displacements were performed to the East. Then, the displacement is:

The total distance traveled is the same as the modulus of the displacement whenever the movement is constrained to a straight line with no changes in the direction. Then, the distance traveled is:

Answer:

The last option is the only correct one if you like to multiply

The second last option is good if you like to divide.

Explanation:

Each fraction in the last two options has a value of 1

example

dividing by 1

15 cm /(100 cm/ 1 m) = 0.15 m          0.15 m / (1000 m/ 1km) = 0.00015 km

and

multiplying by 1

15 cm(1 m / 100cm) = 0.15 m         0.15m(1 km/1000m) = 0.00015 km

only one of the two fractions in each of the top two options has a value of 1.

In 1 hour, the hour hand sweeps across 1/12 of the clock's face. In 40 min, the hour hand travels (40 min)/(60 min) = 2/3 of the path it covers in an hour, so a total of 1/12 × 2/3 = 1/18 of the clock's face. This hand traces out a circle with radius 0.25 m, so in 40 min its tip traces out 1/18 of this circle's radius, or

1/18 × 2π (0.25 m) ≈ 0.087 m

The minute hand traverses (40 min)/(60 min) = 2/3 of the clock's face, so it traces out 2/3 of the circumference of a circle with radius 0.31 m:

2/3 × 2π (0.31 m) ≈ 1.3 m

The second hand completes 1 revolution each minute, so in 40 min it would fully trace the circumference of a circle with radius 0.34 m a total of 40 times, so it covers a distance of

40 × 2π (0.34 m) ≈ 85 m

The distances traveled by the tips of the hour hand, minute hand and second hand in a 40-min interval are 0.087 m, 1.3 m and 85 m respectively.

In a clock, there are three hands of the clock. One is hour hand, second is minute hand and third one is second hand.

The hour hand of the clock is 0.25 m long. The hour hand sweep 1/12 of the clock face each hour (as there are 12 hours in a clock). Thus, in a 40-minute interval, it will travel the distance of,

\(d=2\pi\times\dfrac{40}{12\times60}(0.25)\\d\approx0.087\rm\; m\)

The minute hand of the clock is 0.25 m long. In a 40-minute interval, it will travel the distance of,

\(d=2\pi\times\dfrac{40}{60}(0.31)\\d\approx1.3\rm\; m\)

The second hand of the clock is 0.25 m long. In a 40-minute interval, it will travel the distance of,

\(d=2\pi\times\dfrac{40\times60}{60}(0.34)\\d\approx85\rm\; m\)

Thus, the distances traveled by the tips of the hour hand, minute hand and second hand in a 40 min interval are 0.087 m, 1.3 m and 85 m respectively

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In Physics, energy can be defined as the ability and capacity to do work by an object or physical body.

In Physics, energy can be defined as the ability to do work. Thus, energy must be possessed or transferred to a physical object (body) before it can be used in doing a work or heating a system.

Generally, there are two (2) main types of energy and these are;

For example, you require a sufficient amount of energy to move a crate of egg across a given distance.

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Answer:. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another. ... All forms of energy are associated with motion.

Explanation:. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another. ... All forms of energy are associated with motion.

Answer:

the oscillations of the electrons must be in the 10⁸ Hz = 100 MHz range

Explanation:

The speed of a wave of radio, television, light, heat, all are manifestations of electromagnetic waves that are oscillations of electric and magnetic fields that support each other, the speed of all these waves is the same and the vacuum is equal to c = 3 108 m / s

All waves have a relationship between the speed of the wave, its frequency and wavelength

          c = λ f

          f = c /λ

for this case lam = 1 m

          f = 3 10⁸/1

          f = 3 10⁸ Hz

the oscillations of the electrons must be in the MHz range

It should be clarified that the speed of light in air is a little lower

          n = c / v

          v = c / n

the refractive index of vacuum is n = 1 and the refractive index of air is n = 1.000002

Answer:

can u send pictures again it's unclear.

This bone can only tolerate 0.0405 mm of compression before it snaps.

The Young's modulus.

The ratio of tensile stress to tensile strain is a feature of the material that expresses how easily it can stretch and bend.

A modulus function is a function that provides a number or variable's absolute value. It generates the size of the number of variables.

The modulus operator, which can be used with any two accessible operands, is an addition to the C arithmetic operators. In order to obtain a result, it divides the supplied numerator by the supplied denominator. In other words, it results in a remainder for the integer division.

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Answer:

Centripetal force is defined as, "the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation,"

Explanation:

so if you put a small ball por grape and put it on a table and you take a wine glass and spin it around the grape the grape will continue spinning even if you stop spinning the glass hope this helped

;)

Answer:

A force acting on a moving body at an angle to the direction of motion, tending to make the body follow a circular or curved path. The force of gravity acting on a satellite in orbit is an example of a centripetal force; the friction of the tires of a car making a turn similarly provides centripetal force on the car.

Explanation:

The final temperature of the water is approximately 19.8°C.First, we need to calculate the heat lost by the water as it cools down from 80°C to the final temperature.

We can use the formula: Q = m × c × ΔT where Q is the heat lost, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.

The mass of water in the calorimeter is:

90 ml = 90 g

The heat lost by the water is:

Q1 = 90 g × 4.18 J/g°C × (80°C - T)

Q = m × Lf + m × c × ΔT

The mass of ice added to the water is 10 g. The heat gained by the ice is:

Q2 = 10 g × 334 J/g + 10 g × 4.18 J/g°C × (T - (-20°C))

where 334 J/g is the heat of fusion of water.

Since the calorimeter is insulated, we know that the heat lost by the water must equal the heat gained by the ice. Therefore:

Q1 = Q2

90 g × 4.18 J/g°C × (80°C - T) = 10 g × 334 J/g + 10 g × 4.18 J/g°C × (T - (-20°C))

Simplifying and solving for T, we get:

T = 19.8°C

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In soccer, when a foul is committed by a member of the opposing team, the opposing team is awarded various types of kicks depending on the location of the foul.

Goal Kick: A goal kick is awarded to the defending team when the attacking team last touched the ball before it went out of bounds over the goal line, either on the ground or in the air, and not scoring a goal. It is taken from within the defending team's goal area. A goal kick does not result in any points for either team.

Free Kick: A free kick is awarded to the team that was fouled. The location of the free kick depends on the severity and location of the foul. If the foul occurred within the opposing team's penalty area, a penalty kick may be awarded, which is taken from the penalty spot, 12 yards away from the goal line.

The opposing team must be at least 10 yards away from the ball. Points can be scored directly from a free kick if the ball is kicked into the opponent's goal without touching any other player. The number of points scored depends on the rules of the competition but is typically counted as one goal.

Drop Kick: A drop kick is not typically awarded as a result of a foul. It is a type of restart used to begin or resume play after a stoppage, such as a goal being scored or a halftime break. The player drops the ball and kicks it just after it touches the ground. Points can be scored if the ball crosses the opponent's goal line and into the goal.

Corner Kick: A corner kick is awarded to the attacking team when the ball goes out of bounds over the goal line, with the defending team being the last to touch it. The kick is taken from the corner nearest to where the ball went out of play. Points can be scored directly from a corner kick if the ball is kicked into the opponent's goal without touching any other player.

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The mass of the steel ball, m₁ = 3.0 kg

The mass of the arm, m₂ = 4.0 kg

The length of the arm, r = 7 cm

r = 7/100

r = 0.7m

The angle between the shoulder and the arm = θ

The magnitude of the torque is given by the formula:

The force, F, is the combined weight of the steel ball and the arm

F = (m₁ + m₂)g

F = (3.0 + 4.0)(9.8)

F = 7(9.8)

F = 68.6N

a) The magnitude of the gravitational force about the athlete's shoulder if he holds his arm straight parallel to the floor

θ = 180°

b) 45° below horizontal

θ = 45°

Answer:

mass = 81g

volume = 1cm^3

Explanation:

Answer: 4R

Explanation:R=pL/A

R second wire=p2L/1/2A

=4R

Answer:

Must include: 21

Explanation:

Complete Question

A 100-W (watt) light bulb has resistance R=143Ω (ohms) when attached to household current, where voltage varies as V=V0sin(2πft), where V0=110 V, f=60 Hz. The power supplied to the bulb is P=V2R J/s (joules per second) and the total energy expended over a time period [0,T] (in seconds) is \(U = \int\limits^T_0 {P(t)} \, dt\)

Compute U if the bulb remains on for 5h

Answer:

The value is  \(U = 7.563 *10^{5} \ J\)

Explanation:

From the question we are told that

   The power rating of the bulb is \(P = 100 \ W\)

   The resistance is   \(R = 143 \ \Omega\)

   The  voltage is  \(V = V_o sin [2 \pi ft]\)

   The  energy expanded is \(U = \int\limits^T_0 {P(t)} \, dt\)

   The  voltage  \(V_o = 110 \ V\)

   The frequency is  \(f = 60 \ Hz\)

    The  time considered is  \(t = 5 \ h = 18000 \ s\)

Generally power is mathematically represented as

             \(P = \frac{V^2}{ R}\)

=>          \(P = \frac{( 110 sin [2 \pi * 60t])^2}{ 144}\)

=>           \(P = \frac{ 110^2 [ sin [120 \pi t])^2}{ 144}\)

So  

     \(U = \int\limits^T_0 { \frac{ 110^2* [sin [120 \pi t])^2}{ 144}} \, dt\)

=>  \(U = \frac{110^2}{144} \int\limits^T_0 { ( sin^2 [120 \pi t]} \, dt\)

=>  \(U = \frac{110^2}{144} \int\limits^T_0 { \frac{1 - cos 2 (120\pi t)}{2} } \, dt\)

=>  \(U = \frac{110^2}{144} \int\limits^T_0 { \frac{1 - cos 240 \pi t)}{2} } \, dt\)

=>  \(U = \frac{110^2}{144} [\frac{t}{2} - [\frac{1}{2} * \frac{sin(240 \pi t)}{240 \pi} ] ]\left | T} \atop {0}} \right.\)

=>  \(U = \frac{110^2}{144} [\frac{t}{2} - [\frac{1}{2} * \frac{sin(240 \pi t)}{240 \pi} ] ]\left | 18000} \atop {0}} \right.\)

\(U = \frac{110^2}{144} [\frac{18000}{2} - [\frac{1}{2} * \frac{sin(240 \pi (18000))}{240 \pi} ] ]\)

=>   \(U = 7.563 *10^{5} \ J\)