We fear too little those events that will claim lives. A) accidentally. *B) undramatically. C) in the near future. D) one person at a time.

Using principles in Physics the way in which air bags can reduce the chance of death or injury is that the airbag increases the time over which the velocity of the head changes so that the acceleration is reduced, and thus the force is reduced.

This is referred to as a vehicle occupant-restraint system using a bag designed to inflate extremely quickly, then quickly deflate during a collision.

The gas in the bag can only leave at a certain rate which makes it deflates slowly, and the time duration of the deceleration increases which therefore leads to the force being reduced during a collission and reduces the risk of injury.

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The thermometer that should be used to monitor the temperature of the sanitizing rinse in a dishwashing machine is a maximum-registering thermometer.

Explanation:

What is a thermometer?

A thermometer is an instrument used to measure temperature. There are several types of thermometers, including alcohol, mercury, and digital thermometers. These thermometers have different uses, depending on the situation.

What are maximum-registering thermometers?

When monitoring the temperature of the sanitizing rinse in a dishwashing machine, a maximum registering thermometer should be used. This type of thermometer is designed to measure the highest temperature reached during a certain period. The maximum registering thermometer is required to ensure that the sanitizing rinse temperature is at the required level. In a dishwashing machine, the temperature of the sanitizing rinse should be at least 180°F or 82°C. It's critical to sanitize the dishes thoroughly to avoid the spread of germs or bacteria.

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Answer:

before this type of attack, high acceleration is the most important thing.

Explanation:

As the zebra is ambushed by the crocodile the most important thing is a quick reaction, in this attack the most likely is that the crocodile is in the water so it cannot run after the zebra.

Consequently, before this type of attack, high acceleration is the most important thing.

Statement b is correct. Her kinetic energy of rotation does not change because, by conservation of angular momentum, the fraction by which her angular velocity increases is the same as the fraction by which her rotational inertia decreases.

When the ice skater pulls her arms in, her rotational inertia decreases. Rotational inertia is a measure of an object's resistance to changes in rotational motion. As the rotational inertia decreases, the ice skater's angular velocity (rate of rotation) increases to conserve angular momentum.

Angular momentum (L) is defined as the product of rotational inertia (I) and angular velocity (ω):

L = I * ω

According to the conservation of angular momentum, the total angular momentum remains constant unless an external torque is applied. In this case, since no external torque is acting on the ice skater, the angular momentum is conserved.

When the ice skater pulls her arms in, her rotational inertia decreases. To maintain the conservation of angular momentum, her angular velocity increases by the same fraction. Therefore, her kinetic energy of rotation remains the same.

The correct statement is b. The ice skater's kinetic energy of rotation does not change because, by conservation of angular momentum, the fraction by which her angular velocity increases is the same as the fraction by which her rotational inertia decreases.

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Answer:

A) d_o = 20.7 cm

B) h_i = 1.014 m

Explanation:

A) To solve this, we will use the lens equation formula;

1/f = 1/d_o + 1/d_i

Where;

f is focal Length = 20 cm = 0.2

d_o is object distance

d_i is image distance = 6m

1/0.2 = 1/d_o + 1/6

1/d_o = 1/0.2 - 1/6

1/d_o = 4.8333

d_o = 1/4.8333

d_o = 0.207 m

d_o = 20.7 cm

B) to solve this, we will use the magnification equation;

M = h_i/h_o = d_i/d_o

Where;

h_o = 3.5 cm = 0.035 m

d_i = 6 m

d_o = 20.7 cm = 0.207 m

Thus;

h_i = (6/0.207) × 0.035

h_i = 1.014 m

Using the concept of direction, we got the mountain behind me when we turn West.

A mountain is an elevated portion of Earth's crust, generally with steep sides that show significantly exposed bedrock. Although definitions vary, a mountain may differ from plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 meters (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in the mountain ranges.

Mountains are formed through a tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, slumping, and other forms of mass wasting, as well as through erosion by rivers and the glaciers.

Hence, when we turn West, the mountain will be behind me.

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Answer:

sorry do not speak Spanish so I would not be able to help you probably cannot read this but I would be happy to help you if you follow me and bake English so thank you

Answer:

PFA

:-)

Explanation:

The wavelength of the sinusoidal wave traveling along a rope is calculated to be 21.5 cm.

The wavelength of a sinusoidal wave is defined as the distance between two consecutive crests or troughs. It can be started by finding the frequency of the oscillator that generates the wave:

frequency = number of vibrations / time

frequency = 45.0 / 29.0 s = 1.55 Hz

After this, we can find the speed of the wave:

speed = distance / time

speed = 400 cm / 12.0 s = 33.3 cm/s

The speed of a sinusoidal wave on a rope is related to its frequency and wavelength by the equation:

speed = frequency x wavelength

Therefore, we can rearrange the equation to solve for wavelength:

wavelength = speed / frequency

wavelength = 33.3 cm/s / 1.55 Hz

wavelength = 21.5 cm

Therefore, the wavelength of the wave is 21.5 cm.

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The heat transfer rate by convection is given by the following equation: qcon v = h × A × (Tb - Ta)The heat transfer rate by radiation is given by the following equation: qra d = σ × A × [(Tb + 273)4 - (Ts + 273)4] × εEquating the above equations, we get,

The steady convective heat flux from the base plate to air is given by the following equation: qcon v = h × A × (Tb - T where, qcon v = steady convective heat flux from the base plate to air h = convective heat transfer coefficient A = area of the base plate.

Tb = temperature of the base plate Ta = temperature of the air. The heat transfer rate by convection is given by the following equation: qcon v = h × A × (Tb - T Use the definition of net radiative heat transfer and heat transfer rate equation for thermal radiation together with emissivity of steel ca0.5 to calculate the steady radiative heat flux from the base plate to the surrounding.

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The coefficient of friction between the soap and the tub is 0.1.

The coefficient of static friction is the ratio of the maximum static friction force between the surfaces in contact before movement commences to the normal force.

Mathematically, the coefficient of static friction is given as;

μ = F/N

where;

Before an object start moving, the static friction must be overcame since it resists the motion of the object.

The normal force on the soap is the vertical downward force on the soap applied by Alan, N = 500 N

The force of friction on the soap, F = 50 N

μ = F/N

μ = 50 / 500

μ =  0.1

Thus, the coefficient of friction increases with increase in the horizontal force of friction and decrease in the normal force on the object.

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A container gas expands to fill a 3l container and has a mass of 129g its density is equal to 0.043 \(kgm^{-3}\)

Let's understand the answer in detail

Density is equal to the mass of a substance divided by its volume. The SI unit of density is Kg/m3. Other units of density are g/cm3, g/mL, kg/L

The formula we are using is going to be

D=m/v, where

D= density

m=mass

V=volume

The data that is given to us states that

mass = 129g

volume= 3 L

density = ?

Now we will put the values in the formula,

d= m/v

d = 0.129 Kg / 3L

d = 0.043 Kg / L

Therefore the density of the gas is 0.043 Kg / L.

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Fraction of the light shining straight at a piece of clear glass is reflected from the first surface is 1/8.

Light is a form of energy that enables us to see the world around us. It is an electromagnetic radiation that is visible to the human eye. Light can be measured in various units such as lumens, lux, and candelas. Light waves are of different colors, and each color has a different wavelength.The reflection of light from a surface is called reflection. When light falls on a surface, it may be absorbed, transmitted, or reflected. Reflection of light is the property of a surface to reflect light. The reflection of light from a smooth surface is called specular reflection, and the reflection from an irregular surface is called diffuse reflection.Reflection of lightWhen a beam of light is reflected from a surface, the angle of incidence and the angle of reflection are equal. The angle of incidence is the angle between the incoming ray and the normal to the surface at the point of incidence. The angle of reflection is the angle between the reflected ray and the normal to the surface at the point of incidence.

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Answer:

stress

Explanation:

Common causes of chronic insomnia include: Stress. Concerns about work, school, health, finances or family can keep your mind active at night, making it difficult to sleep. Stressful life events or trauma — such as the death or illness of a loved one, divorce, or a job loss — also may lead to insomnia.

Answer:

C. Chronic Stress

Explanation:

I took the test

If your car gets 37.4 miles per gallon, it is approximately equivalent to 15.89 kilometers per liter.

To convert miles per gallon (mpg) to kilometers per liter (km/L), we can use the conversion factors of 1 mile ≈ 1.60934 kilometers and 1 gallon ≈ 3.78541 liters.

Given that the car gets 37.4 miles per gallon, we can calculate the equivalent in kilometers per liter.

First, we convert miles to kilometers by multiplying 37.4 mpg by 1.60934 km/mile, which gives us approximately 60.07 km/gallon.

Next, we convert gallons to liters by dividing 60.07 km/gallon by 3.78541 L/gallon, resulting in approximately 15.89 km/L.

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Answer:

Apply the following formulae horizontally And get A value for time

Remember horizontal acceleration is zero

\(s = ut + \frac{1}{2}a {t}^{2} \\ 0.8 = 1.7 \times t \\ \frac{0.8}{1.7} = t \\ t = 0.47s\)

and then to find the height apply the same above equation vertically...remember vertical initial velocity is zero

\(s = ut + \frac{1}{2} a {t}^{2} \\ s = \frac{1}{2} \times 10 \times (0.47) ^{2} \\ s = 1.1045m\)

If a coin rolls off the edge of a table. The coin was traveling at a speed of 1.7 m/s. If it lands 0.8 m away from the table leg, then the height of the table would have been 1.0835 meters.

There are three equations of motion given by  Newton

v = u + at

S = ut + 1/2×a×t²

v² - u² = 2×a×s

As given in the problem If a coin rolls off the edge of a table. The coin was traveling at a speed of 1.7 m/s. If it lands 0.8 m away from the table leg, then we have to find the height of the table,

By using the second equation of motion given by newton

S = ut + 1/2at²

0.8 = 1.7×t

t = 0.8 / 1.7

t = 0.47 seconds

Now applying the second equation of motion for the vertical motion,

S = ut + 1/2gt²

  = 0 + 0.5×9.81×0.47²

  = 1.0835 meters

Thus, the height of the table would have been 1.0835 meters.

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Answer:

Explanation:

Fill the graduated cylinder partially with water to a level where you can submerge the object and drop the sinker weight into the water. If you don't have a graduated cylinder to fit your object, put a cylinder in a basin, fill it to the top with water and measure the overflow into the basin. Your answer will be less accurate because of the number of times the water has been moved. Note the amount of displacement in milliliters (ml) caused by the sinker and string.

Measure the mass of your object (say a cork) on a balance scale in grams (g). Be sure the object is dry when it is measured. Record its weight. Attach the sinker with the string to the object. If you use a staple or pin, be sure to include that when you measure the displacement of the sinker in step one.

The minimum non-zero distance from the first speaker we can place a second speaker playing the same tone for maximally constructive interference can be determined by considering the conditions for constructive interference between two waves.

The wavelength of a wave can be calculated using the formula:

\(Wavelength = Speed of sound / Frequency\).

In this case, the frequency is 680 Hz and the speed of sound is 340 m/s:

\(Wavelength = 340 m/s / 680 Hz = 0.5 m\).

For maximally constructive interference, the path difference between the two speakers should be an integer multiple of the wavelength. Since we want the minimum non-zero distance, the path difference should be equal to one wavelength.

Therefore, the minimum non-zero distance from the first speaker to place a second speaker for maximally constructive interference is equal to one wavelength, which is 0.5 m.

Thus, the correct answer is e) 0.5 m.

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kinetic energy is the force that needs to be dissipated in a collision.  The following statement is False.

Kinetic energy is not a force; it is a form of energy associated with the motion of an object. In a collision, kinetic energy is not the force that needs to be dissipated but rather a quantity that can be transferred or transformed during the collision. During a collision, forces act on the objects involved, causing them to change their motion. These forces can come from external sources or be generated internally due to interactions between the objects. The forces involved in a collision are responsible for altering the objects' velocities and momentum. Kinetic energy is related to the mass and velocity of an object and can be calculated using the equation:

Kinetic energy = (1/2) × mass × velocity^2

In a collision, the total kinetic energy of the system might change. Some collisions result in a transfer or transformation of kinetic energy between the objects involved, while in other cases, the total kinetic energy is conserved. The forces involved in a collision determine how the kinetic energy is distributed or dissipated. Energy can be transferred into other forms, such as heat, sound, or deformation of the objects involved, depending on the nature of the collision and the materials of the objects.

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Answer:

vf = 32ms

Explanation:

v  =  u  +  a t ,

v  =  0  +  8.0  x  4.0  

v  =  32 ,

v  =  32 m /s  

Hope it Helps! :D  

Water freezes to form ice cubes. In this solid structure, particles are strongly bonded each other thus, the water particles become locked in place.

Freezing point is the temperature at which the substance converts from liquid state to solid state. In solid state, all particles are strongly bonded together.

In water, particles in liquid state are free to flow and they are not locked at all. In gaseous state no definite shape or volume are there and particles are away from each other and they diffuse easily.

In solid state particles are not at all free to flow and thus they are locked in place. That's why water molecules are locked in place in a cube until they melt completely.

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Answer:

b

Explanation:

because the metalloids are the thing in the middle

Explanation:

On a position vs time graph (x vs t), displacement is the difference in positions (Δx = x₂ − x₁).

On a velocity vs time graph (v vs t), displacement is the area under the graph (Δx = ∫ v dt).

Answer:

36km

Explanation:

Answer:

D. 5,700 m/s

Explanation:

Sorry for the late reply! I recently just answered this earlier.

Answer: C

Explanation: just took the test

Answer:

W = 0 J

Explanation:

Formula for work done is;

W = F × d

Where;

W is work done

F is Force

d is distance covered

What this means is that we will calculate the area under which the given times in the graph pass.

Thus;

At constant force of F = 40 N which falls in between distance of 0 m and 2m,

W1 = 40 × 2 = 80 J

At constant force of -20 n which will fall between distance of 2 m and 6 m which is 4m, we have;

W2 = -20 × 4

W2 = -80 J

Thus, total workdone is;

W = W1 + W2

W = 80 - 80

W = 0 J

Answer:

20 J

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Answer: B. Vector rules

Explanation:

To solve this we must be knowing each and every concept related to velocity. Therefore, the correct option is option B among all the given options.

Velocity refers to a vector assessment of an object's rate of motion and direction of motion. As a result, in order to calculate velocity using this definition, we must be familiar with both magnitude and direction.

It determines how quickly or slowly something moves. Consider the following scenario: two moving objects. If both items are going in the same direction, it is simple to determine which one is moving faster. However, judging which item is quicker is difficult when they are traveling in different directions.  Vector rules is used for combining velocities.

Therefore, the correct option is option B among all the given options. Vector rules is used for combining velocities.

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