Question 2 of 10
Which type(s) of radiation can damage living cells?
O A. Beta particles and gamma rays only
O B. Alpha particles, beta particles, and gamma rays
O C. Gamma rays only
D. Alpha particles and gamma rays only

Answer:

yes also good for pennies

Explanation:

Answer: Hello! I believe you might have a condition known as Digital Eye Strain (DES). This is cause by too much screen time, poor posture, bad lighting and viewing distance.

Before you panic, this is not permanent. Here’s some ways to help prevent it :

• Put the screen 20-28 inches away, 4-5 in below eye level and adjust your brightness. (Make sure your screen isn’t too bright)

•Rest your eyes for 15 minutes every 2 hours.

•Try the 20-20-20 rule: look at an object 20 ft away for 20 seconds every 20 minutes.

Please rest your eyes more. If it doesn’t go away after a bit. Please book a appointment with your eye doctor to make sure everything’s alright :)

let me know if you have any questions! :)

The pressure of the tank, when filled with water at a depth of 6 m, is approximately 580.124 atmospheres (atm). To calculate the pressure of the tank, one can use the equation: Pressure (P) = Density (ρ) × g × Depth (h)

Pressure (P) = Density (ρ) × g × Depth (h)

Given: Density of water (ρ) = 1000 kg/m³

Acceleration due to gravity (g) = 9.8 m/s²

Depth (h) = 6 m

Using the given values, one can calculate the pressure:

Pressure = 1000 kg/m³ × 9.8 m/s² × 6 m Pressure

= 58800 kg·m⁻¹·s⁻²

Now, let's convert the units to pascals (Pa) using the conversion 1 atm = 1.013 x \(10^5\) Pa:

Pressure = 58800 kg·m⁻¹·s⁻² × (1 atm / 1.013 x\(10^5\) Pa)

Pressure = 580.124 atm

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According to an equation, an object's momentum is determined by multiplying its mass by its velocity. Where m denotes mass and v denotes speed. The equation shows that momentum is inversely proportional to mass and inversely proportional to velocity of an object.

The momentum is directly proportional to both mass and speed. The momentum of the object grows proportionately with either an increase in mass or velocity.

Therefore, The momentum of an object increases with increasing mass or velocity. The momentum of a large, swift object is larger than that of a small, slower object.

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a) Around 8.57 seconds pass during takeoff for the airplane.

b) Across the 600 meters, the aircraft accelerates at a rate of about 4.41 m/s^{2}.

In physics, acceleration is the rate at which the velocity of an object changes in relation to time. According to Newton's Second Law, the sum of all forces acting on an item results in its acceleration. The acceleration unit in the SI is the meter per second squared.

a) we can use the following equation:

v^{2} = u^{2} + 2as

v = final velocity (350 km/h)

u = initial velocity (0 km/h)

a = acceleration (unknown)

s = distance (600 m)

we have to convert the final velocity to meters per second (m/s):

350 km/h = 350,000 m/3600 s = 97.2 m/s

For time (t):

t = (v - u) / a = √(2s/a)

Substitute the values,

t = √(2s/a) = √(2 x 600 / a) = 34.64 / √a

we need to use another equation:

v = u + at

Substitute the values,

97.2 = 0 + a t

t = 97.2 / a

Equating the above two equations,

34.64 / √a = 97.2 / a

a = 4.41 m/s^{2}

b) we will use the same equation:

v^{2} = u^{2} + 2as

Substitute the values,

97.2^{2}= 0 + 2a(600)

a = 4.41 m/s^{2}

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Answer:

Explanation:

4126h2.

Answer:

acceleration remains constant at g= 9.8m/s²

velocity however ...increases

For Steven and Candace to help their children against emotional issues and risk behaviors, the best thing both of them can do set high expectations for their children for their education.

Emotional problems are those problems which affect us mentally as a result of our weakness to stand being stretched to certain life issues. We can say that a student whose admission was withdrawn from an institution due to low academic performance might deal with certain emotional issues. This will technically make them more focus, determined and take their mind off such problems.

So therefore, helping ones children to aim high in their academic pursuits can help protect them from risk behaviors and sone emotional problems.

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Answer:

Explanation:

ω = v / R

where ω is angular speed of a point situated at distance R from axis and having a linear speed of v .

Given v = 150 m/s ; R =.10 m

ω = 150 / .10

= 1500 radian /s .

Final angular speed is 1500 radian /s .

As, the mass is in rest, the x-component of the force must be zero.

Therefore, x component of the second force is 28.0 N.

Balancing y component of the force,

Therefore, y component of the force is 71.54 N.

The peak wavelength for peak intensity of 3000 K is 967 nm and peak wavelength for peak intensity of 50,000K will be 58nm.

Power is the amount of energy which is transferred or converted per unit of time taken. In the International System of Units, the unit of power is the watt (W), which is equal to one joule per second.

Stefan-Boltzmann constant = 5.67 × 10⁻⁸ Wm²

Peak intensity = 2000 K

P = (5.67 × 10⁻⁸) × (3000)⁴

P = 4.59 × 10⁶

P = 459 2700 watts of power per square meter.

Peak intensity = 3000 K

Using Wein law,

λ max = 0.29/ 7

λ max = 0.29/ 3000 = 9.67 × 10⁻⁵ = 967 nm

Same method as above will be used for 50,000 K

P = 3.56 × 10¹¹ W/m²

P = 356.00.000000000 W/m²

λ (Peak) = 58nm

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A. Y max = 2A

B. Y max =  A

C. Y max =  0

D. Y max = A

So the order is, (A),(B) = (C),(D)

The maximum displacement or distance moved by means of a factor on a vibrating frame or wave measured from its equilibrium position. it's far identical to at least one-half the period of the vibration course.

For amplitude measurements, you rely the variety of vertical divisions occupied by means of the sign's vertical signal after which multiply with the aid of the vertical scale.

The better the amplitude, the better the power. To summarise, waves convey strength. The quantity of power they bring is associated with their frequency and their amplitude. The better the frequency, the greater electricity, and the better the amplitude, the more strength.

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A) \(y_{max}\) \(= 2A\)

B) \(y_{max}\) \(= A\)

C) \(y_{max}\) \(= 0\)

D) \(y_{max}\) \(= A\)

So the order is

{A), B) = D), C)}

A wave is a disturbance in a medium that transports energy without net movement of particles. This can take the form of elastic deformation, changes in pressure, electrical or magnetic strength, electrical potential, or temperature.

-It transmit energy.

-Usually it involves periodic repetitive movements.

-It does not result in net motion of the medium or particles in the medium              

(mechanical waves).

Waves can be periodic, in which these quantities repeatedly oscillate around their equilibrium (rest) values ​​at specific frequencies. If the entire waveform moves in one direction, it is called a traveling wave.

In contrast, a pair of superimposed periodic waves propagating in opposite directions form a standing wave. In a standing wave, the vibration amplitude has a zero point at some point where the wave amplitude appears smaller or even zero.

Waves are often described by the wave equation (the standing wave field of two opposing waves) or the unidirectional wave equation for propagation of a single wave in a defined direction.

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Answer:

Some liquids flow really fast and some flow really slow.

Explanation:

This is because of a liquids viscosity , If the liquids viscosity is high it will flow really slow like syrup. But if it has high viscosity it will flow really fast much like water.

Hope this helped!!   :)

Answer:pressure = density * acceleration due to gravity * height

H=72.6cm= 0.726m

P=0.726*13.6*10^3*9.8

P=96761.28Pa

Explanation:

The atmospheric pressure if the column of mercury in a barometer stands at 72.6 cm is 9.68 × 10⁴ Pa.

The stress at a location within a confined fluid or the perpendicular force per unit area are the two definitions of pressure used in the physical sciences. A 42-pound box with an area of 84 square inches at the bottom will apply pressure on a surface equal to the force divided by the surface area.

Given:

The height in the barometer, h = 72.6 cm or 0.726 m,

The density of mercury, d =  13.6 × 10³ kg/m³,

The gravitational acceleration, g = 9.80 m/s²,

Calculate the atmospheric pressure by the following formula,

P = dgh

Here, P is the atmospheric pressure

Substitute the values,

P =  13.6 × 10³ × 9.80 × 0.726

P = 9.68 × 10⁴ Pa,

Therefore, the atmospheric pressure if the column of mercury in a barometer stands at 72.6 cm is 9.68 ×10⁴ Pa.

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We know that all fundamental forces have a fundamental charge and that each of them is responsible for some fundamental phenomenon. In the case of the gravitational force, we know that it is responsible of all gravitational interactions and that its magnitude is proportional to the mass.

Therefore, gravitational force increases with the mass of an object and the answer is B.

Answer:

below

Explanation:

The change in Kinetic Energy is equal to the work done

  KE = 1/2 mv^2

      Change in KE =   1/2 m (19^2 - 3.2^2) = 747.1 kjoules

The distance traveled by the object from its initial position is 384 cm.

Distance is the sum of an object's movements, regardless of direction. Without respect to the object's starting or finishing positions, distance can be defined as the amount of space it has traveled.

An object is moving in a straight path.

The speed of the object from its initial position is 12.8 cm/s.

The object is moving for 05 minutes.

Then, t = 0.5 min = 0.5 × 60 = 30 seconds.

Now, the speed of an object is the distance of the object per unit time.

Therefore,

s = d / t

d = s × t

d = ( 12.8 cm/s ) × ( 30 s )

d = 384 cm

Hence, the object's position from its initial position is 384 cm.

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Answer:

Mass

Explanation:

kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity (speed) squared.

An object with an initial velocity of 5m/s has a constant acceleration of \(2m/s^2\) .The object has traveled a distance of 50 meters when it is speed is 15m/s how far has us travelled​

To find the distance traveled by the object, we can use the equation:

\(v^2 = u^2 + 2as\)

where v is the final velocity, u is the initial velocity, a is the acceleration, and s is the distance traveled.

Given:

Initial velocity (u) = 5 m/s

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

Final velocity (v) = 15 m/s

We need to solve for s.

Rearranging the equation, we have:

s =\((v^2 - u^2)\) / (2a)

Substituting the given values, we get:

s = \((15^2 - 5^2)\)/ (2 * 2)

s = (225 - 25) / 4

s = 200 / 4

s = 50 m

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Answer: a

Explanation:

Answer:

Mass = 56.83 Kg

Explanation:

\(PE = mgh\\9094 J = 16m*10 m/s^2*mass\\mass = \frac{PE}{g*h} \\mass = \frac{9094 J}{16*10} = 56.83 kg\)

1. Three reasons why a mother may choose not to breastfeed include:

   Medical reasons: Some mothers may have medical conditions that make it difficult or impossible to breastfeed, such as certain infections or medications that are not compatible with breastfeeding.

   Personal choice: Some mothers may choose not to breastfeed for personal reasons, such as discomfort with the idea of breastfeeding or the desire for the father or other family members to be more involved in feeding the baby.

   Lack of support: Some mothers may not have access to the resources or support they need to successfully breastfeed, such as proper education, lactation consultants, or time off from work.

2. Low-birth-weight infants (LBW) are more likely to experience several health and developmental problems, including:

   Respiratory distress syndrome (RDS): LBW infants may have underdeveloped lungs, leading to difficulty breathing and the need for oxygen support.

   Infections: LBW infants may be more susceptible to infections due to immature immune systems.

   Hypoglycemia: LBW infants may have low blood sugar levels, which can lead to seizures or other complications.

   Feeding difficulties: LBW infants may have difficulty feeding due to underdeveloped sucking and swallowing reflexes or other medical conditions.

   Neurological problems: LBW infants may be at increased risk for developmental delays, cerebral palsy, and other neurological problems.

3. Five advantages that breast milk has over formula as the first food for an infant include:

   Optimal nutrition: Breast milk is the optimal source of nutrition for infants, containing the perfect balance of nutrients, antibodies, and hormones to support growth and development.

   Immune protection: Breast milk contains antibodies and other immune factors that help protect infants against infections and other illnesses.

   Digestibility: Breast milk is easier for infants to digest than formula, reducing the risk of digestive problems and colic.

   Reduced risk of allergies and chronic diseases: Breastfeeding has been linked to a reduced risk of allergies, asthma, obesity, and other chronic diseases in later life.

   Bonding and emotional benefits: Breastfeeding can promote bonding and emotional attachment between mother and infant, providing a sense of security and comfort.

Answer:

I think is is

Explanation:

B and C why because i have a gut feeling

All the equations of motion are as follows, Displacement (s) equation, Final velocity (v) equation, Average velocity (v_avg) equation, Displacement (s) equation with average velocity, and Displacement (s) equation.

In terms of its motion as a function of time, equations of motion define how a physical system behaves. In more detail, the equations of motion define how a physical system behaves as a collection of mathematical functions expressed in terms of dynamic variables.

In conclusion, equations of motion define how a physical system behaves in terms of how its motion changes over time.

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Answer:

Efficiency = 65%

Explanation:

The formula of Efficiency applied to any circumstance is:

Efficiency = Useful Energy / Energy applied

Then replacing the values given its:

Efficiency = 25 J / 32 J

Efficiency = 0.65

0.65 written as percentage is 65%, then:

Efficiency = 65%

As you do 32 joules of work using a pair of scissors and the scissors do 25 joules of work cutting a piece of fabric, the efficiency of the scissors is 78.125%.

Efficiency is the proportion of work done by a machine or throughout a process to the overall amount of energy or heat used.

The ratio of usable output to total input can be used to objectively measure efficiency. The efficiency of the device is defined as the ratio of energy converted to a useable form to the original amount of energy supplied.

Mathematically,

efficiency of a machine = (work output/work input)×100%

Given parameters:

Input work to the pair of scissors= 32 joules.

Output work from the pair of scissors= 25 joules.

Hence,

The efficiency of a machine = (work output/work input)×100%

= ( 25 joule/32joule)×100%

= 78.125%

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Answer: t = 0.25 s

Explanation:

To find the time it will take the ball to travel a vertical height of 5m, we would apply one of Newton's equation of motion shown below

h = ut + 1/2gt^2

where

h is the height or vertical displacement

u is the initial velocity

g is the acceleration due to gravity

t is the time taken to reach height h

From the information given,

h = 5

g = - 9.8 m/s^2 because the ball is decelerating while moving upwards.

Given that the initial velocity is 30m/s and it was launched at an angle of 45 degrees, we would find the y or vertical component of the velocity. Thus,

u = 30sin45

By substituting these values into the equation, we have

5 = 30sin45t - 1/2 x 9.8 x t^2

5 = 21.21t - 4.9t^2

4.9t^2 - 21.21t + 5 = 0

This is a quadratic equation. The standard form of a quadratic equation is expressed as

ax^2 + bx + c = 0

By comparing both equations,

a = 4.9

b = - 21.21

c = 5

We would solve the equation by using the quadratic formula which is expressed as

Replacing x with t, we have

t = 0.25 s

A current of a 6 flows through a light bulb for 12 s. The total charge that passes through the light bulb during the given time is 72 coulombs.

To calculate the total charge that passes through the light bulb, we need to use the formula Q = I * t, where Q represents the charge in coulombs, I represents the current in amperes, and t represents the time in seconds.

Step 1: Identify the known values:

Current (I) = 6 amperes

Time (t) = 12 seconds

Step 2: Calculate the charge using the formula:

Q = I * t

Step 3: Substitute the known values into the formula:

Q = 6 amperes * 12 seconds

Q = 72 coulombs

Therefore, the total charge that passes through the light bulb during the given time is 72 coulombs.

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Answer:

The power can be shut down directly.

Explanation:

Given that,

The power be shut off when removing an entangled victim from an escalator.

We need to find how should power be shut off

According to given condition,

The power can be shut down directly in emergency for removing an entangled victim from an escalator.

Hence, The power can be shut down directly.

Answer:

The angular velocity is slowing down.

Explanation: