which vector is the sum of vectors a and b

Answer:

1299N

Explanation:

GIven data

Weight W= 1500N

Angle Ф= 30°

The applied force up the frictionless ramp is gotten by applying the formula below

F= WcosФ

substitute

F=1500 cos 30

F = 1500*0.8660

F= 1299N

Hence the applied force is 1299N

Answer:

The size of the gravitational force is proportional to the masses of the objects and weakens as the distance between them increases. Both objects exert an equal attractive force on each other: a falling object is attracting the Earth with the same size force as the Earth is attracting it

Answer:

Percent of Female Workers = 40%

Explanation:

The percentage of the female workers in the given group of workers can be easily found by the following formula:

[tex]Percent\ of\ Female\ Workers = \frac{No.\ of\ Female\ Workers}{Total\ No.\ of\ Workers}\ x\ 100\%[/tex]

where,

Total No. of Workers = 1200

No. of Female Workers = Total Workers - No. of Male Workers

No. of Female Workers = 1200 - 720 = 480

Therefore,

[tex]Percent\ of\ Female\ Workers = \frac{480}{1200}\ x\ 100\%[/tex]

Percent of Female Workers = 40%

Answer:

The carbon atom has greater kinetic energy than a hydrogen atom.

Hope this helps! :)

Carbon atom has the greater kinetic energy.

Kinetic energy is defined as the energy attained by a body by virtue of its motion.

Here,

The speed of the hydrogen atom and carbon atom are the same.

Kinetic energy of hydrogen atom, KEн = 1/2 m(н) v(н)²

Kinetic energy of carbon atom, KEс = 1/2 m(с) v(с)²

where m and v are mass and speed respectively.

Taking the ratio,

KEн/KEс = m(н)/m(с)

KEн/KEс = 2/12

KEн/KEс = 1/6

KEс = 6KEн

Therefore the kinetic energy of carbon atom is 6 times the kinetic energy of hydrogen atom.

Hence,

Carbon atom has the greater kinetic energy.

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Answer:

Explanation:

 Investigators  thought this meant that oxygen was eight times more massive than hydrogen. They presumed the  chem-ical form-ula for water to be H-O

Hope this helped!!!  .

Answer:

The vibrational frequency of the rope is 5 Hz.

Explanation:

Given;

number of complete oscillation of the rope, n = 20

time taken to make the oscillations, t = 4.00 s

The vibrational frequency of the rope is calculated as follows;

[tex]Frequency = \frac{number \ of \ complete \ vibrations}{time \ taken} \\\\Frequency = \frac{20 }{4 \ s} \\\\Frequency = 5 \ Hz[/tex]

Therefore, the vibrational frequency of the rope is 5 Hz.

Answer:

"An earthquake radiates P and S waves in all directions and the interaction of the P and S waves with Earth's surface and shallow structure produces surface waves. Near an earthquake the shaking is large and dominated by shear-waves and short-period surface waves."  please rephrase this in your own words.

Explanation:

Im not sure if this helps but credits to: eqseis.geosc.psu.edu › Notes › waves_and_interior

Answer:

B

Explanation:

Explanation:

1. Height Relatives to reference point, Mass, and strength of the gravitational field it's in

2. Distance in the magnetic field

Answer:

I think it's 2 the photo is hard to tell what they are exactly talking about.

She is probably suffering from a major depression. Depression results in emotional change and loss of interest in previously appreciated activities.

Depression is a frequent and significant medical ailment that has an adverse effect on how you feel, think, and act. It can cause a number of mental and physical difficulties, as well as a loss in your ability.

According to epidemiological research, a hereditary element is involved in 30% to 40% of instances of bipolar illness. As a result, environmental influences have a larger role in the development of depression.

Maria's mother was deported 6 months ago, and she is staying with a cousin. She has to share a room with 3 other children and is very discouraged.

She has little energy to do much of anything, and she cries a lot, she is probably suffering from a major depression.]

Hence, option A is correct.

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Answer:

both hit qaulity

Explanation:

Newton's Third Law says that every interaction involves two forces - in this case (1) hammer pushes nail, and (2) nail pushes hammer. When a hammer hits a nail, Newton's Third Law says that the force that the hammer exerts on the nail is exactly the same size as the force the nail exerts on the hammer.

Answer:

A. The path of least resistance.

Explanation:

ur welcome again ;)

An electric current will always follow the path of least resistance. So, the right option is a.

In inverse relation to the resistance of the pathways, electric current follows every available paths.

The voltage and resistance of the path in the electric circuit affect the amount of electric current that flows through the circuit.

The quantity of electric current flowing through the circuit is inversely proportional to the resistance in the circuit.

Assuming a fixed voltage, the current increases with decreasing resistance. The current decreases in accordance to the level of increasing resistance.

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Answer:

Could you explain that more better?

Explanation:

Explanation:

Energy can be converted from one form to another. Examples: Gasoline (chemical) is put into our cars, and with the help of electrical energy from a battery, provides mechanical (kinetic) energy. ... Similarly, purchased electricity goes into an electric bulb and is converted to visible light and heat energy.

Answer:

Explanation:

Energy transformation is when energy changes from one form to another.  While energy can be transferred or transformed, the total amount of energy does not change – this is called energy conservation. For example, Electricity goes into an electric bulb and is converted to visible light and heat energy.

Hope this helped!!!

Answer:

Ok, first is important that you understand how the heat radiation works.

All the objects that have some heat energy in them, radiate some of that energy in the form of electromagnetic waves.

Particularly, the Sun radiates a lot of energy (at the point that if you step under the sunlight, you can feel on your skin the heat that comes from the sun, this is due to radiation).

Now, suppose that you have a thin coat of water over you, then the material that gets impacted by that radiation will be the water and not you, and then the energy is dissipated (some of the energy goes to your body and some go to the air)

This is one way in which spraying water over themselves helps the elephants to keep them cool.

Another way in which heat can be transferred is by conduction.

When you have a hot object and a cool object, and you put them together (so the objects touch each other), the heat will flow from the hotter object to the cooler object until both objects have the same temperature.

Then if the elephant body temperature is larger than the temperature of the water that the elephant sprays over his body, when the water touches the body some of the heat in the elephant body will be transferred to the coat of water, and in this way, the temperature of the elephant's body decreases.

These are the two ways we wanted to find.

Mass of the bird(m) = 150 g = 0.15 kg

Speed (v) = 10 m/s

Kinetic Energy = [tex]\frac{1}{2}m v^{2} = \frac{1}{2} 0.15 (10)^{2}[/tex] = 7.5 J

Altitude (h) = 15 m

Gravitational Potential Energy = (0.15)(9.81)(15) = 22.0725 J

Mechanical Energy = Kinetic Energy + Potential Energy = 7.5 + 22.0725

= 29.5725 J

Answer:

281 Hz

Explanation:

I am so so sorry if this is wrong. But good luck and have a good day

I would say the Common Cold because it's the main reason why kids and adults miss school or work.

I hope this helps <3 :)

(also  please mark brainliest if you want to)

Answer:

For more than a decade, heart disease and cancer have claimed the first and second spots respectively as the leading causes of deaths in America. Together, the two causes are responsible for 46% of deaths in the United States. There is donation center's to help fight back against cancer and heart diseases, There are also of course places you can go to become a organ donner if there is no saving you from something... Hope this helps^_^

Explanation:

plz give brainliest and rating

Answer:

a person pushes a 125 kg

Explanation:

The total translational kinetic energy of the object is 122.5 J.

Kinetic energy is defined as the energy possessed by a body by virtue of its motion.

Here,

Mass of the object, m = 125 kg

The final velocity of the object, v = 1.4 m/s

It is given that the object was initially at rest on a frictionless surface. When the object was pushed by the person, it gained some amount of kinetic energy and ended up with a final velocity of 1.4 m/s.

So, the expression for total translational kinetic energy of the object is given by,

KE = KEf + KEi

KE = 1/2m(v² + u²)

Since, the object was initially at rest, the initial velocity,

u = 0

Therefore, the kinetic energy of the object,

KE = 1/2 mv²

KE = 1/2 x 125 x (1.4)²

KE = 122.5 J

Hence,

The total translational kinetic energy of the object is 122.5 J.

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Answer:

Average acceleration of the car is 1.167 m/s^2

Explanation:

The speed of car with which it is travelling is 12 m/s

As the driver accelerates the car, the speed reaches 26 m/s

The change in speed in 12 seconds is

26 -12 = 14 m/s

Average acceleration is change in speed divided by time

[tex]\frac{14}{12} \\1.167[/tex] m/s^2

Answer:

This answered one of my questions, thanks

Explanation:

Answer:

the answer is NO regardless of gravity, you will always weigh the same.

Explanation:

Look up about 3 centimeters ⬆️

Answer:

0.6Nm

Explanation

Given

Force = 3N

Distance = 20cm = 0.2m

Moment = Force * perpendicular distance

Substitute

Moment = 3N  * 0.2

Moment = 0.6Nm

Hence her moment is 0.6Nm

Answer: happy Ramadan

Explanation: thanks

Answer:

gamma rays are super compact

Explanation:

as you move up the electromagnetic spectrum the wave lengths get shorter and shorter (higher and higher energy) gammas being the highest on the spectrum

Radio waves pass through us easily every day with no bad effects. Gamma Rays will kill you in large doses. the difference between these two forms of waves are in their energy.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave.

The energy of the electromagnetic photon is given by frequency times plank's constant. Hence energy is directly proportional to the requency. The frequency of the radio waves is far smaller than the gamma rays hence it has low energy. this is the difference, which leads gammas rays  injurious to heath.

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Answer:

3rd diagram

Explanation:

From the laws of reflection, we understood that the angle of incidence in equal to the angle of reflection.

For example, if a ray of light strikes a mirror at 60°, it reflected at the same angle (i.e 60°)

Considering the diagram given in the question above,

The ray of light strikes the mirror at 40°. Therefore, the light will be reflected with the same angle (i.e 40°)

Thus, the 3rd diagram gives the correct answer to the question.

Answer:

1. True

2. False

3. True

4. True

5. False