A roof has a surface area of 20000cm². If the atmospheric pressure exerted on the roof is 100000Pa, determine the force on it.(Take g=10N/kg)​

The velocity of a vehicle is typically expressed relative to ground.

Velocity is the speed of something that is given direction.

velocity is the measurement  to a  body's "pace of change of  the displacement in relation to time" whenever the main  body is traveling through along a straight route.

It is common knowledge of  that the word "linear" refers to be something that is totally straight; therefore,  when the body moves in a straight path, it is said to be linear velocity .

Alternatively, velocity is the  distance traveled by a body traveling in a specified to the direction during of a predetermined period of time. Thus, the fundamental idea of linear velocity is the  provided by the union of these two quantities.

Because it always has the direction of velocity is a vector.

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The magnitude of the average force is -1.5×10³ N.

What is force?

A force is any action that seeks to preserve, modify, or deform a body's motion.

We know,

The magnitude of the average force is:

F = m(v-u)/t

F = Average force

m = mass of the cyclist

v = Final velocity

u = Initial velocity

t = time.

Putting values into the formula

F = 50(0-10)/0.5

F = -1500 N

F = -1.5×10³ N

The negative sign is the force act against the motion of the cyclist.

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Answer:

The higher the concentration, the denser the liquid.

Explanation:

Changing concentration of a solution changes the density of the solution . Density is the ratio of mass and volume whereas concentration is the ratio of minor part that is, it is solute to the major part i.e. solvent.

If the amount of matter is increased without changing the volume, then the density increases

i hope this helped

Answer: because not all asteroids hit them

Explanation:

there isn’t much wind in space to direct the asteroid

Answer:

The elongation of the wire is approximately 4.81 x 10-³ m.

Explanation:

To find the elongation of the wire, we can use the formula:

Elongation = (Force * Length) / (Young Modulus * Cross Sectional Area)

Plugging in the given values, we have:

Elongation = (10³ N * 2.5 m) / (2.0 x 10-¹¹ N/m² * 6.5 x 10-⁷ m²)

We can simplify this to:

Elongation = (2500 N * 2.5 m) / (2.0 x 10-¹¹ N/m² * 6.5 x 10-⁷ m²)

Which simplifies to:

Elongation = (625 x 10-⁸ m³) / (1.3 x 10-¹¹ m³)

Simplifying further, we have:

Elongation = 4.81 x 10-³ m

Therefore, the elongation of the wire is approximately 4.81 x 10-³ m.

It's important to note that this is an approximate value, as the actual elongation may depend on various factors such as the temperature and the specific properties of the wire.

It is possible to think about angular frequency (ω) as a way to measure angular displacement with respect to time. The equation is (K= ω/m)

ω=km

We are aware that k is unchanging.

Then, we can change the formula's k subject to (K= ω/m).

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The kind of star that belongs to the main sequence is the sun, according to the Hertzsprung-Russell diagram.

In Pac-Man World 3, opponents are called Spectral Monsters. They are fiery Spectral Realm beings who are enraged by Erwin's interference with their world. They appear to be much less intellectual than ghosts, yet because of their special skills, they are more dangerous. Pac-Man can consume Spectral creatures in the same manner as ghosts.

When Clyne turns off the device, the human parts of these apparitions are promptly killed along with their spirit counterparts. The final rebels in the town are swept up by American and Moldovan forces as the fight comes to an end.

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3.24 m/s² is the box's horizontal acceleration in accordance with the query.

The word "force" has a specific meaning in science. At this level, calling a force a pushed or a pull is entirely appropriate. A strength isn't something an object "has in it" or that it "contains." One thing experiences a force from another. Here are both living things and non-living objects in the concept of an energy. kicking a ball, pushing and pulling on the door, or kneading dough are a few examples.

Horizontal component is 200cos(36°) = 80.9 N

Then,

F=ma

100 = 25a

a = 3.24 m/sec²

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It fall during the next second of time is 3hrs.

Gravitational potential energy is transformed into kinetic energy as the object is propelled out of rest and falls to Earth. Since the object is released closer to the Earth's surface, the force of gravity's acceleration is constant.

Knowing this

u = 0 m/s.

velocity after t = 1s

v = u+gt

v = 0 + 9.81 x 1s

v = 9.81 m/s

area covered in the first second

area covered in the first second = ut + 0.5 x g x t²

area covered in the first second =0 + 0.5x 9.81 x 1 = 4.90m

Let 4.90 be h

We will now use the distance traveled in the second second.

so that velocity after t = 1s

velocity after t is 1s = 1 x t+ 0.5 x g x t²

velocity after t is 1s = 9.81 x 1 + 0.5 x 9.81 x 1 = 3 x 4.90

So since h= 4.90

Then the answer is 3 x h = 3h.

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It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm, then the object should  be placed 25cm away from the lens.

Lens is a transmissive optical device which focuses or disperses light beam by means of refraction.

Given focal length, f= 20 cm

and h1= 4h0

So, h1/h0= m = 4

Hence, v/u = 4

and v= 4u

As, 1/v - 1/u = 1/f

Now, 1/4u-(1/-u)= 1/20

5/4u= 1/20

So, u = 25 cm

The object should  be placed 25cm away from the lens.

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If the mass of one object is doubled and the mass of the other object is tripled and the separation distance between the objects' centers is doubled, then the new force of gravitational attraction would be 210 units.

What is the gravitational force between two objects?

The gravitational force of attraction between two objects in the universe is directly proportional to the product of masses of the object and inversely proportional to the square of the distance between the objects.

F = Gm₁m₂/r²

where;

when mass of one object is doubled and the mass of the other object is tripled, we will have;

F' = G(2m₁ x 3m₂)/r²

Also when separation distance between the objects' centers is doubled,  the new force of gravitational attraction becomes;

F' = G(2m₁ x 3m₂)/(2r)²

F' = G(2m₁ x 3m₂)/(4r²)

F' = 6/4 (Gm₁m₂/r²)

F' = 6/4 (F)

F' = 6/4 (140 units)

F' = 210 units

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Static and secured in a tripod best describes the camera motion in the scenes directly prior to the old man's defiant hand gesture.

One of the hardest things for a photographer to do is to take steady, sharp pictures. Even if we like the spontaneity of point-and-shoot photography, shaky hands can reduce the overall caliber of your pictures.

A beautiful shot is made up of many crucial elements. The ability to capture the ideal lighting, composition, and moment—the three components of a great image—is among the most crucial.

You may capture the ideal sunrise or sunset with the use of a tripod, which lowers camera movement and enhances image quality.

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a) The frequency that the driver of the car observes as the police car approaches is calculated by using the Doppler effect.

The frequency of the sound wave is increased as the source of the sound (the police car) approaches the observer (the driver of the car). The frequency observed by the driver of the car is given by:

f_observed = f_source * (v_source + v_observer) / (v_source - v_observer)

Substituting the given values, we get:

f_observed = 2400 * (38 + 23) / (38 - 23) = 4860 Hz (to the nearest integer).

b)  The frequency of the sound wave is decreased as the source of the sound (the police car) moves away from the observer (the driver of the car). The frequency observed by the driver of the car is given by:

f_observed = f_source * (v_source - v_observer) / (v_source + v_observer)

Substituting the given values, we get:

f_observed = 2400 * (38 - 23) / (38 + 23) = 1380 Hz (to the nearest integer).

c)The frequency of the sound wave is decreased as the source of the sound (the police car) approaches the observer (the driver of the car). The frequency observed by the driver of the car is given by:

f_observed = f_source * (v_source - v_observer) / (v_source + v_observer)

Substituting the given values, we get:

f_observed = 2400 * (38 - 23) / (38 + 23) = 1380 Hz (to the nearest integer).

The frequency of the sound wave is increased as the source of the sound (the police car) moves away from the observer (the driver of the car). The frequency observed by the driver of the car is given by:

f_observed = f_source * (v_source + v_observer) / (v_source - v_observer)

Substituting the given values, we get:

f_observed = 2400 * (38 + 23) / (38 - 23) = 4860 Hz (to the nearest integer).

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2Na (s)+Cl₂ (g) → 2NaCl(s) the equation represents a chemical change because it is a synthesis reaction.

When two or more substances (elements or compounds) react to generate a new product, which is a compound with new qualities. They synthesis to create a new material, therefore the name "synthesis reaction."

Synthesis reactions occur when two separate atoms or molecules interact to generate a new molecule or substance. When a synthesis reaction happens, most of the time energy is released and the process is exothermic.

The typical equation for this sort of reaction is A + B → AB. The reaction of sodium (Na) with chlorine (Cl) to form sodium chloride is an example of a synthesis reaction (NaCl).

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Theoretically, extrinsic motivation is what occurs when an external factor serves as the driving force behind the pursuit of a goal.

If an individual is motivated on rewards or other elements, such like praise, fame, or money, this is known as extrinsic motivation. Unlike intrinsic motivation, this kind of motivation is not motivated by internal causes. One example of an extrinsic motivation is receiving payment for completing a task.

Extrinsic motivation is significant because it can be a useful tool for changing behavior. People are usually motivated to behave in particular desirable ways when there is a chance of receiving awards or sanctions from outside sources.

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a) The speed in meters per second is 10996.2  meters per second.

b) The Time taken is 10.97 hours.

We must be able to remind ourselves that speed is the ratio of the distance that is covered to the time that is taken to orbit the earth. If we have this definition at the back of our minds, we can now see that it would be easy for us to be able to obtain the speed if we do have the distance and the time or make the necessary manipulations so as to be able to obtain any of the parameters that have been required in the speed formula as described above.

We know that;

1 mile per hour = 0.447 meters per second

24,600 mile per hour =  24,600 mile per hour * 0.447 meters per second/ 1 mile per hour

= 10996.2  meters per second

Given that;

Distance = 270,000 miles - 150 miles = 269850 miles

Time = ?

Speed = 24,600 mph

Time = Distance/ speed

=  269850 miles/ 24,600 mph

= 10.97 hours

The speed of the Orion Space Capsule is  24,600 mph.

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Answer:

A baseball’s resultant velocity is 17.23 m/s, at 26.02° from the level ground then the  horizontal component of the baseball’s velocity is 15.4835m/s

Velocity means the direction of the movement of the body or the object here given data is velocity =17.23 m/s, at angle= 26.02° and we have to find  horizontal component of the baseball’s velocity=?

So, Horizontal distance can be expressed as x=V × t

Cos26.02°=x/17.23 for vector component, this means that the

17.23cos26.02°= x horizontal component is the hypotenuse length

x=15.4835m/s is the horizontal component of the baseball’s velocity

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Explanation:

As per as calculations

The gravitational potential energy of a 59 kg pole vaulter changes by 2360 J if center of mass rises by 4.0 m during the jump.

The gravitational potential energy is the energy in an object due to change in its position. To say in simple terms, this energy is related to gravitation force. This energy does not depend on the path, but depends on the height to which an object is raised.

The formula for finding gravitational potential energy acquired by an object that is raised to a height "h" is

E=mgh

So, we have,

E= 59×10×4

= 2360 J

The potential energy gained by the pole vaulter is 2360 J.

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a) The energy of a photon with a wavelength of 550 nm is 3.58 10⁻¹⁹J. The equivalent energy in J is 2.40* 10⁻¹⁸ eV. a photon of 10 nm.

b) Its wavelength of an x-ray photon is 0.165 nm.

The wavelengths of a wave is the distance in between adjacent subsequent crests. It is evaluated in the direction of the wave. A wave's length is commonly denoted by the Greek letter lambda (). The ratio of a light train's frequencies (f) and velocity (v) in a medium is its dimension.

By comparing the distance between the two identical locations on adjacent waves, the wavelengths can always be found. When determining the duration of a longitudinal wave, the distance from one compression to the next or from one seismic waves to the next is measured.

Briefing:

E=hcλ

E=(4.136×10−15 eV s)(3.0×108 m/s)550×10−9 m

E=2.40 * 10⁻¹⁸eV.

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Due to its lower fuel consumption, the smaller star will live longer than that of the larger star.

A physicist is a professional who focuses on the science of physics, which includes all of the interactions between matter and energy in the material world at all time and spatial scales. His discovery of law of the photovoltaic effect, which was a crucial step in the evolution of quantum theory, earned him the 1921 Newbery Medal.

A scientist is somebody who methodically acquires data and uses it to form hypotheses, test those assumptions, and further knowledge and understanding. A scientist's methodology, such as the use of numbers (statisticians) or data, can also be used to further characterize them (data scientists).

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1. The atomic mass of the new atom be 243.  Hence, Option (e) is correct.

2. The atomic number of the new atom be 94. Hence, Option (f) is correct.

3. The symbol of the new atom be Pu.  Hence, Option (h) is correct.

4. Alpha decay is demonstrated here. Hence, Option (i) is correct.

A type of radioactive decay known as "alpha decay" occurs when an atomic nucleus emits an alpha particle as it changes or decays into a new atomic nucleus. Here, the newly produced atom will have a four-less atomic mass number and a two-less atomic number. A helium nucleus is another name for the alpha particle that was released. The alpha particles have a positive charge and a sizeable mass.

Ernest Rutherford investigated how radiation is deflected through a magnetic field to distinguish alpha decay from other types of radiation. Given that the particles carry a +2e charge, the alpha decay would deflect a positive charge.

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Orange, Blue, and Red are the three filters. They are easy to attach and cover the lens and flash on the front of the Polaroid Go camera.

The primary benefit of Polaroid photography is the immediate visual feedback. Sharing Polaroid photos is one of the simplest things you can do with them.

An image of a friend is taken and given to the friend. Being one-to-one rather than one-to-the-world makes it a little different from other forms of sharing. Polaroid started to lose some of its major clients in the real estate, insurance, and photo identi-fication industries as digital cameras proliferated on the market.

As film sales collapsed, Polaroid declared bankruptcy in October 2001. A series of chemicals and dyes are sandwiched between layers to make up a Polaroid;

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The distance between fringes for 694nm is 3.267 cm and for apparatus submersed in water with index of refraction of 1.333 is 2.45cm.

In the Young’s Double Slit Experiment, the distance between adjacent fringes is Δy = xλ/d, assuming the slit separation d is large compared with λ.

The equation for the distance between fringes is given by:

Δy = xλ/d  where x is the location of screen and d is slit separation. λ is the wavelength.

According to the given information,

x = 4m

d = 0.0850mm or 0.085 x 10^-3m

λ = 694 nm or 694 x 10^-9 m

Hence, using the equation, the distance between fringes is:

Δy = 4 * 694 x 10^-9 /0.085 x 10^-3 = 0.032658 m = 32.66mm = 3.267 cm

When submerged in water, wavelength in water is given by:

wavelength in water = wave length / refractive index

The refractive index of an optical medium is a dimensionless number that gives the indication of the light bending ability of that medium. The refractive index of water is 1.333.

wavelength in water = 694/1.333 = 520.63 nm

Hence, the new distance between fringes is

Δy = 4 * 520.63 x 10^-9 /0.085 x 10^-3 = 0.0245 m = 24.5mm = 2.45 cm

Note: The question is incomplete. The complete question probably is: Using the equation for the distance between fringes, Δy = xλ/d , complete the following. (a) Calculate the distance (in cm) between fringes for 694 nm light falling on double slits separated by 0.0850 mm, located 4.00 m from a screen. cm (b) What would be the distance between fringes (in cm) if the entire apparatus were submerged in water, whose index of refraction is 1.333? cm

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The maximum height the skateboard can reach is  is 4.6 m.

Height is the vertical distance between two points.

To calculate the maximum height the skateboard can reach, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the maximum height is 4.6 m.

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solve today's free puzzle, you will need your Morse Code Decoder Ring from last week. This puzzle is a list of words that are related in some way. Can you decode them all and figure out their relationship?

This puzzle would be great for kids 8 and older. If you need help constructing the decoder, click here.

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Hot a most massive planet, Jupiter uses the same mass star for all schematics.

Some examples of the power of gravity are as follows: the force that holds the gases in the sun. the force used to propel a ball downward after it has been hurled into the air. the mechanism that causes a car to drift downhill even when the gas pedal is not depressed. a glass you dropped hitting the ground with power.

Because it consistently attempts to pull masses together rather than pushing things apart, the gravitational force is known as attractive. It is obvious that the gravitational force is inversely correlated with the masses of the two interacting objects.

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When asked to assist with tasks that MOST likely occurred in Paxton's life, he complains.

Demonstrate is often used interchangeably with the words prove, evince, manifest, and display. Demonstrate suggests demonstrating through action or just by displaying feelings whereas all these terms mean "one reveal openly or make evident." They applauded vociferously to show their approval.

Whenever listing "Demonstrated Experience" on your resume, be sure to include the following information: (1) Whenever a skill was used, (2) Where it was used, (3) For how long, (4) How it was used, (5) Your interactions with other people while using the skill, and (6) The project's topic.

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Answer: 3 kg

Explanation:

The formula for potential energy is Ug=mgh where Ug is potiental energy, m is mass, g is the acceleration caused by gravity which is either 9.8 m/s^2 or 10m/s^2 depending on your textbook and h is the height and or displacement. So…

120 = m(10)(4)

120=40m

m= 3 kg

Answer:

Explanation:

Given:

h = 4 m

W = 120 J

g = 10m/s²

_________

m - ?

W = m*g*h

m = W / (g*h) = 120 / (10*4) = 3 kg