Compared to visible light, ultraviolet radiation is more harmful to human skin and eyes because ultraviolet radiation has which of the
following characteristics?

A higher frequency
B. longer wavelength
C. higher speed
D. longer period

Answer:

Gamma rays cannot be seen or felt, but can cause ionization.

Explanation:

Gamma rays are a type of electromagnetic radiation, similar to X-rays, radio waves, and visible light. They have the highest energy and the shortest wavelength in the electromagnetic spectrum. Gamma rays are emitted by the nuclei of atoms during certain types of radioactive decay.

Gamma rays cannot be seen or felt because they are electromagnetic waves, and not particles like visible light or sound waves. Gamma rays do not have enough energy to excite the atoms in our eyes, so we cannot see them. They also do not have enough energy to cause vibrations in our ears, so we cannot hear them.

Gamma rays can cause ionization when they interact with matter, meaning that they can knock electrons off atoms and molecules, creating ions. When gamma rays pass through matter, they can disrupt the electrons in atoms and molecules, which can cause damage to living cells and genetic material. This is why gamma rays are considered to be dangerous and are used in very limited circumstances, such as in cancer treatment, where the goal is to destroy cancer cells.

Common pointing devices used to control screen movement include computer mouse, touch pads, touch screens, graphics tablets, and trackballs. Some of these devices, such as mic and joysticks, can be added to the computer system according to your needs.

Pointing device is a general term for any device used to control cursor movement on a computer screen.

For desktop computers, the most common pointing device is the computer mouse. A touchpad is the most common pointing device on laptop computers. Finally, the most common pointing device on smartphones and tablets is the finger on the touchscreen.

To know more about pointing devices,

https://brainly.com/question/2887900

#SPJ4

Yes.  you would feel a force 20 N towards backward direction due to this.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

"When one body exerts a force on the other body, the first body experiences a force that is equal in size in the opposite direction of the force which is exerted," according to Newton's third law of motion.

Hence, according to Newton's third law of motion, when you pushed them with forward (away from your) with a force of 15N, you would feel a force of equal magnitude (20 N) in opposite direction (backward direction).

Learn more about force here:

https://brainly.com/question/13191643

#SPJ2

Answer:

The laws of thermodynamics define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium.

Answer:

1) Use multiple instruments to measure

2) Take several measurements

3) Control the other variables delicately  

4) Be meticulous when measuring

This question can simply be solved by the use of the formula of uniform speed.

It would take "4.5 hours" for the family to get home.

Since the car is moving at a constant speed. Therefore, the formula of speed for uniform motion will be used here. The formula of uniform speed is given as follows:

\(s = vt\)

where,

s = distance to travel = 270 km

v = speed of the vehicle = 60 km/hr

t = time taen = ?

Therefore,

\(270\ km = (60\ km/hr)t\\\\t = \frac{270\ km}{60\ km/hr}\\\\\)

t = 4.5 hours

Learn more about uniform speed here:

https://brainly.com/question/17261628?referrer=searchResults

The attached picture shows the graphs of uniform and non-uniform speed.

Answer:

Explanation:

goes down as the temperature decreases, and vice versa. Sound's frequency is independent of temperature, while its speed is directly proportional to temperature. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. ... This is faster than 331 meters per second, which is the speed of sound in air at freezing temperatures.

hope this helps!!!!

Sound waves travel more fastly in hot air , since particles in atmosphere gets more energetic in higher temperature. Hence, as the temperature decreases, the wave’s speed decreases.

Sound waves are mechanical waves passing through a medium. Sound waves are longitudinal where, the oscillation of particles is along the direction of wave propagation.

Compression waves, which at a microscopic scale rely on molecules transmitting energy one to another, are used to convey sound through the air.

Higher temperatures produce more energetic air molecules, which vibrate more rapidly. As a result of the molecules colliding with one another, the sound waves can move more quickly.

Therefore, as the temperature decreases, the speed of sound wave decreases. Thus, option B is correct.

Find more on sound waves:

https://brainly.com/question/21995826

#SPJ2

Answer:

OK i had this up there but they deleted it anyways you ever drove so fast you couldnt control the car

Explanation:

thats because you had an STD now you have to tell someone that

In order to apply the relationship o, a torsional member must be made of a ductile material, be homogeneous, and have a constant diameter.

A torsional member is subject to torsional or twisting forces. The relationship "o" represents the angle of twist or torsion in the member. To ensure this relationship holds, the following conditions must be met:

Ductile material: The torsional member should be made of a material that exhibits ductility. Ductility is the ability of a material to deform plastically without breaking. Ductile materials can withstand the twisting forces without fracturing, allowing for a reliable measurement of the angle of twist.

Homogeneity: The torsional member must be homogeneous, meaning it has uniform properties throughout its cross-section. If the member has varying material properties, such as different stiffness or strength, it can lead to uneven distribution of torsional forces and affect the accuracy of the relationship o.

Constant diameter: The torsional member should have a constant diameter along its length. This ensures that the distribution of torsional stresses remains uniform throughout the member. If the diameter varies, it can cause stress concentration points and lead to inaccurate measurements of the angle of twist.

In summary, a torsional member must be made of a ductile material to withstand the twisting forces, be homogeneous to maintain uniform properties and have a constant diameter to ensure accurate measurements of the angle of the twist.

To learn more about Ductility click here:

brainly.com/question/12975499

#SPJ11

Answer:

Explanation:

Add pqq to both sides

3t = pqq + 2 pn                       Pull out p as a common factor.

3t = p(qq + 2n)                       Divide by qq + 2n

3t/(qq + 2n)

Answer:

Explanation:

Given parameters:

Weight of object  = 49N

Force applied = 12N

Unknown:

Acceleration of object  = ?

Solution:

The acceleration of the object is found by dividing the force by the weight;

 Acceleration  = \(\frac{12}{49}\)   = 0.25m/s²

Answer:

Explanation:

Given:

E₁ = E₂ = E₃ = 1.5 V

I₁ = 2 A

I₂ = 0.5 A

_________

I₃ - ?

Current strength in the common circuit:

I₁ = 2 V

The lamps are connected in parallel.

I₁ = I₂ + I₃

Ammeter 3 read:

I₃ = I₁ - I₂ = 2V - 0.5V = 1.5 V

Answer:1.5

Explanation:

Answer:

K = 9000 J

Explanation:

Given that,

The mass of a boat, m = 2000 kg

The velocity of the boat, v = 3 m/s

We need to find the kinetic energy of the boat. We know that the kinetic energy of an object is given by :

\(K=\dfrac{1}{2}mv^2\\\\K=\dfrac{1}{2}\times 2000\times 3^2\\\\K=9000\ J\)

So, the required kinetic energy is equal to 9000 J.

Answer:

true

Explanation:

as long as it is the right conductive material

The initial velocity with which the ball must be thrown upwards in order for it to take 6 seconds to return to its initial level is 29.4 meters/second.

Assuming negligible air resistance, the time taken by a ball to go up and come down after being thrown vertically upwards is given by:

t = 2*v/g

where:

t = time taken for the ball to go up and come down (in seconds)

v = initial velocity with which the ball is thrown upwards (in meters/second)

g = acceleration due to gravity

In this case, the time taken for the ball to return to its initial level is given as 6 seconds. Therefore, we can write:

6 seconds = 2*v/g

Rearranging the equation, we get:

v = (6 seconds * g)/2 = 29.4 m/s

To know more about resistance refer here

https://brainly.com/question/14327116#

#SPJ11

Given what we know, we can confirm that less helium is present in the upper atmosphere of Saturn due to Helium precipitation.

On Saturn, helium is able to remain in liquid form, due to many internal and external factors of the planet, this means that helium can form precipitation and rain back down onto the planet. For this reason, it does not stay in the atmosphere for long. This process also produces Saturn's internal energy by releasing gravitational energy in the process.

Therefore, we can confirm that less helium is present in the upper atmosphere of Saturn due to Helium precipitation.

To learn more about Saturn visit:

https://brainly.com/question/9048375?referrer=searchResults

Answer: C. Inherited traits carry the instructions for individual genes.

Explanation: bejewels I know stuff. ☆ - ~ hope this helps

Answer:

1.matter made of mass and volume

2.matter is any substance that has mass and takes up a space by having a volume

3.table, coffee, and perfume

4.solid has a strong bonds, liquid has weak bond, and gas no bond

5

If you were to move the sun farther away from the earth and moon, shadows would become sharper and more defined. This is because the light rays from the sun would be more parallel, resulting in less scattering and more direct illumination. The shadows would also be longer because the light source is farther away.

If you were to move the sun closer to the earth and moon, shadows would become less defined and more diffuse. This is because the light rays would be less parallel, resulting in more scattering and less direct illumination. The shadows would also be shorter because the light source is closer.

Answer:

If the sun were moved farther away from the Earth and Moon, the shadows would become sharper and darker because the Sun's light would be more direct and less scattered. This would result in more defined shadows with less ambient light to soften their edges.

On the other hand, if the Sun were moved closer to the Earth and Moon, the shadows would become less defined and lighter because the Sun's light would be less direct and more scattered. This would result in less defined shadows with more ambient light to soften their edges.

However, it's important to note that the position of the sun is not the only factor affecting shadows. Other factors include the size and shape of the object casting the shadow, the position of the observer, and the angle of incidence of the light source.

An ectopic heartbeat is an irregular heartbeat that happens when the heart's sinoatrial node (SA node), which is its normal heartbeat pacemaker, is disrupted. Ectopic beats originate from a location outside of the SA node, disrupting the normal heart rhythm. When it comes to the various types of ectopic beats, the most common is premature ventricular contraction (PVC).

If the ectopic impulse arises from the middle of the right atrium, the P wave will be abnormal. This occurs when the heart's ventricles experience an unexpected electrical impulse, causing them to contract prematurely. The P wave is a wave that appears on an electrocardiogram (ECG) and represents the electrical activity of the atria. The sinoatrial node generates a normal P wave, which spreads through both atria and then travels to the atrioventricular node, which slows the impulse and transmits it to the ventricles. P’ waveIf the ectopic impulse arises from the middle of the right atrium, the P' wave is abnormal.

As a result, the ECG can display the following:P waves with a single, smooth contour that are narrower than normal, P waves that have a pointed apex and are taller than normal, and P waves that merge with other waves, making them indistinguishable on the ECG.P prime waves, which are visible on an ECG, are related to supraventricular beats. They're usually seen in the early part of a supraventricular tachycardia event, which is a fast heart rate originating from the atria.

Learn more about pacemaker here ;

https://brainly.com/question/31622614

#SPJ11

Answer:

thermal energy

Explanation:

For each of these scenarios, the primary method by which heat energy is transferred is:

A) Radiation                           B) Conduction

C) Convection                         D) Radiation

E) Conduction                         F) Convection

G) Radiation                            H) Convection      

Conduction, convection and radiation are all methods of heat transfer. Conduction is the transfer of heat between two solid objects in contact. Convection is the transfer of heat by convection currents in fluids (liquids or gases). Liquids and gases on their own don't conduct heat, but when molecules of a fluid are heated up, they move within the medium and carry the heat energy with them. This phenomenon is called convection currents. Radiation is the transfer of heat in a vacuum. Unlike convection and conduction, radiation does not need a material medium for heat to be transferred, as heat is transferred through electromagnetic waves.

For each situation in the question, heat is transferred in one way or another. The methods are:

Learn more about conduction, convection and radiation here:

https://brainly.com/question/12342626

#SPJ4

Complete question:

Each of the following situations involves the flow of heat energy. For each scenario, specify the primary mode (conduction, convection, or radiation) by which the energy is transferred. a)What is the primary mode of energy transfer from hot coffee inside a Thermos bottle to the environment? b)What is the primary mode of energy transfer from your bare feet to a cold ceramic bathroom floor in the middle of winter? c)What is the primary mode of energy transfer from your body to your hands when you blow on them to warm them? d)What is the primary mode of energy transfer into your sealed car parked in the sun on a hot summer day? e)What is the primary mode of the flow of energy from your tongue to a metal railing if you happen to lick it on a cold winter day? f)what is the primary mode of energy transfer from a hair dryer to your wet hair? g)What is the primary mode of energy transfer from your body on a cold day with no wind? h)What is the primary mode of energy transfer away from your body on a very windy day?

Answer:

As its speed increases.......

The kinetic energy of an object increases as its speed increases. So, option B.

The type of energy that an object possesses as a result of its motion is called kinetic energy.

The kinetic energy of an object is described as the amount of effort required to accelerate a body of a specific mass from rest to its specified velocity.

The body keeps its kinetic energy after gaining it during acceleration, barring changes in speed.

When slowing down from its current pace to a condition of rest, the body expends the same amount of energy.

A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed.

The kinetic energy of the object,

KE = 1/mv²

where m is the mass and v is the speed of the object.

Since, the mass is a constant, the increase in speed can increase the kinetic energy of the object.

Hence,

The kinetic energy of an object increases as its speed increases.

To learn more about kinetic energy, click:

https://brainly.com/question/999862

#SPJ2

To calculate show window branch-circuit loads using one of the two methods, you can multiply each receptacle by 180 volt-amperes.

Branch circuit loads in an electrical distribution system are the electrical equipment and appliances linked to a particular branch circuit. A branch circuit is a conduit through which electricity is sent from the main electrical panel to certain outlets, lights or pieces of equipment inside a building or other structure. The total amount of electrical load that each branch circuit can safely take is determined by its maximum capacity, or the circuit's ampere rating. Lighting fixtures, outlets, kitchen appliances, HVAC systems, and electronic gadgets are just a few examples of the many electrical components that might be branch circuit loads. The safe and effective operation of electrical systems in residential, commercial, and industrial settings depends on the proper sizing and distribution of branch circuits.

1. Identify the number of receptacles in the circuit.
2. Multiply the number of receptacles by 180 volt-amperes.
3. The result will give you the total load in volt-amperes for the show window branch-circuit.

Learn more about circuit here:

https://brainly.com/question/27960757

#SPJ11

The choice on oil paint that is not used to describe its luminosity is b) stained.

On oil paint, these are used to describe its luminosity:

Stained glass is not used to describe the luminosity of oil paint. Stained glass is made by painting or firing powdered glass onto a surface. Oil paint, on the other hand, is made by mixing pigment with a drying oil. The drying oil allows the pigment to be applied in layers and to build up to create a rich, luminous color.

Find out more on oil paint here: https://brainly.com/question/28483666

#SPJ4

Answer:

Chemical energy is the energy of chemical substances that is released when they undergo a chemical reaction and transform into other substances. Some examples of storage media of chemical energy include batteries, food, and gasoline.

The average power developed by the boy during the climb is approximately 29.4 W.

In physics, the amount of energy transferred or converted per unit time is called power.

total height = number of steps x height of each step

total height = 30 x 0.15 m = 4.5 m

Given, time = 60 s

As power = work done / time

work done = force x distance

force = mass x gravity

mass is boy's mass (40 kg) and gravity is acceleration due to gravity (9.81 m/s²).

force = 40 kg x 9.81 m/s² = 392.4 N

The distance that the boy moves is equal to the total height that he has climbed: distance = total height = 4.5 m

work done = force x distance

work done = 392.4 N x 4.5 m = 1765.8 J

power = work done / time

power = 1765.8 J / 60 s

power ≈ 29.4 W

Therefore, the average power developed by the boy during the climb is approximately 29.4 W.

As for the anomalous behavior of water, water has a higher boiling point and melting point as compared to other substances with similar molecular weight. This is due to the strong hydrogen bonding between water molecules, which requires more energy to break the bonds and change the state of water from solid to liquid to gas.

To know more about power, refer

https://brainly.com/question/1634438

#SPJ9

Answer:

Oblique

Explanation:

I think that's the answer I was told this but forgot if this is the right answer if not then sorry

To answer your question, we need to use the conservation of momentum and conservation of energy principles. Since the collision between the two pendula is elastic, the total momentum and total energy before and after the collision remains the same.

Let's assume that the initial velocity of the bowling ball pendulum is v and the final velocity of both pendula after the collision is v'. According to conservation of momentum,
(m_bowlingball * v) = (m_bowlingball * v') + (m_golfball * v')
where m_bowlingball and m_golfball are the masses of the bowling ball and golf ball pendula respectively.
Similarly, using conservation of energy,
(1/2 * m_bowlingball * v^2) = (1/2 * m_bowlingball * v'^2) + (1/2 * m_golfball * v'^2) + m_golfball * g * h
where g is the acceleration due to gravity and h is the maximum height reached by the golf ball after the collision.
Solving these two equations for v' and h, we get:
v' = (m_bowlingball - m_golfball)/(m_bowlingball + m_golfball) * v
h = (m_bowlingball^2/(m_bowlingball + m_golfball)^2) * (v^2/2g)
Substituting the values given in the problem, we get:
v' = (16/21) * v
h = (256/441) * (v^2/2g)
Therefore, the approximate maximum height that the golf ball reaches after the collision is (256/441) * (v^2/2g), which is approximately 0.58 times the height from which the bowling ball was released.
Note: The exact height reached by the golf ball may vary slightly due to friction and air resistance.

To know more about momentum visit:
https://brainly.com/question/30677308
#SPJ11

Answer:

Online.Vs. In person for what exams board ones?