true or false the forces which hold a liquid together or weaker than those which hold a solid together​

Object height = 48.45 cm

Focal length, f = -15.5 cm

Image distance, v = -13.5 cm

Object distance, u = ?

Relationship between image distance, object distance, and focal length is:

Magnification = |v/u|

Image height, H = 6.25 cm

Object height, h = ?

Object height = 48.45 cm

The speed of the particle after 10 seconds is, 25.88m/s.

To find the answer, we have to know more about the equations of motion.

                          \(m=16kg\\u=10m/s\\t=10s\\f=25N\)

                        \(ma=f\\a=\frac{f}{m} =\frac{25}{16}=1.6m/s^2\)

           \(S=ut+\frac{1}{2}at^2=(10*10)+(\frac{1.6*10^2}{2})=178.13m\)

                \(v=\sqrt{u^2+2aS} =\sqrt{10^2+(2*1.6*178.13)} =25.88m/s\)

Thus, we can conclude that, the speed of the particle after 10 seconds is, 25.88m/s.

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Answer:

B

Explanation:

Answer:

B

Explanation:

In contrast to other fish, who have bladders filled with gas, sharks have a liver filled with low-density oil that is similar to vegetable oil. This oil is lighter than water and tends to rise to the top of the water if not contained but because it is in the sharks liver its contained therefor the shark floats!

Explanation:

1 For a sound wave, the pitch is determined by which wave characteristic?

A - Frequency

2 Which of the following waves cannot be transmitted through a vacuum?

C - Sound waves

3 Which of the following could be the value of a wavelength that is found in the visible region of the electromagnetic spectrum?

B - 5 × 10^-7 m

4 Sophie is trying to measure the speed of sound. She stands 24.0 m away from a wall and claps repeatedly, changing the frequency until the echo synchronized with her claps. If she calculates the speed of sound as 325 m • s-1 how long did she wait between claps?

The time between her claps and the echo is twice the time it takes for the sound to travel from her to the wall. Therefore, the time between her claps is:

time = distance/speed = 2 x 24.0 m/325 m/s = 0.148 seconds (to three significant figures).

So the answer is 0.148, without units and correct to three significant figures

Answer:

Breathing.

Explanation:

Because your brain cant handle all of the information.

The oscillation of an object on a frictionless surface is characterized by a constant amplitude, regular frequency, and a lack of energy loss due to the absence of friction.

In such a scenario, the object's motion continues indefinitely, maintaining its oscillatory pattern without any decay in amplitude. Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move. Friction always slows a moving object down. The amount of friction depends on the materials from which the two surfaces are made.

So, The oscillation of an object on a frictionless surface is characterised by a constant amplitude, regular frequency, and a lack of energy loss due to the absence of friction.

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Answer:

thats and observation

Explanation:

observation involves using one or more of the senses -- sight, hearing, touch, smell, and sometimes taste -- to gather information.

yw!

Answer: evidence or an observation? what are the answer choices

Explanation:

The Divergence Theorem is true for the vector field F(x,y,z)=3xi+xyj+3xzk on the region E, which is the cube bounded by the planes x=0,x=3,y=0,y=3,z=0,z=3.

Explanation: The Divergence Theorem states that the flux of a vector field across a closed surface is equal to the volume integral of the divergence of the vector field over the enclosed volume. In this case, the cube is a closed surface, and the vector field F has a constant divergence of 6. Therefore, by the Divergence Theorem, the flux of F across the cube is equal to 6 times the volume of the cube. The volume of the cube is (3^3)=27, so the flux of F across the cube is 6 times 27, which is equal to 162.

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The potential energy at x = 8 m is -2000 V and at x = 2 m is 400 V. The magnitude and direction of the electric field will be 400 V/m directed parallel to the +x-axis

Electric field, an electric property associated with each point in space when charge is present in any form. The magnitude and direction of the electric field are expressed by the value of E, called electric field strength or electric field intensity or simply the electric field.

The electric potential energy of any given charge or system of changes is termed as the total work done by an external agent in bringing the charge or the system of charges from infinity to the present configuration without undergoing any acceleration.

The relation between electric field and electric potential can be generally expressed as – “Electric field is the negative space derivative of electric potential.”

Electric field = - d V / dx

-(-2000-400) = \(\int\ {E} \, dx\)

2400 = E (8-2)

2400 V = E (6)

E = 400 V/m

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Since the JWST stops at L2, the centripetal force required to keep it in orbit is zero. Therefore, the velocity at this point is also zero.

To determine the total gravitational force acting on the JWST at Lagrange Point 2 (L2), we need to consider the gravitational forces from both the Sun and the Earth.

The gravitational force between two objects can be calculated using Newton's law of universal gravitation:

F = G * (m1 * m2) / r^2

where F is the gravitational force, G is the gravitational constant (approximately 6.67430 × 10^-11 m^3 kg^-1 s^-2), m1 and m2 are the masses of the two objects, and r is the distance between their centers of mass.

For the JWST, the mass is 6500 kg, and the distance from the center of the Earth to L2 is 1.50 million km, which is equivalent to 1.5 × 10^9 meters.

The mass of the Sun is approximately 1.989 × 10^30 kg, and the distance from the center of the Sun to L2 is also 1.50 million km.

Therefore, the total gravitational force acting on the JWST at L2 is the sum of the gravitational forces from the Sun and the Earth.

F_total = F_Sun + F_Earth

F_Sun = G * (m_JWST * m_Sun) / r_Sun^2

F_Earth = G * (m_JWST * m_Earth) / r_Earth^2

Substituting the known values, we can calculate the gravitational forces.

Now, to verify that the total gravitational force is equal to the centripetal force required to keep the JWST in orbit, we need to compare it to the centripetal force.

The centripetal force required to keep an object in circular motion is given by:

F_c = (m_JWST * v^2) / r

where F_c is the centripetal force, m_JWST is the mass of the JWST, v is the velocity, and r is the radius of the orbit.

In this case, the JWST is effectively orbiting the Sun, so we can use the distance from the Sun to L2 as the radius of the orbit.

We get the following when we set the gravitational force equal to the centripetal force:

F_total = F_c

Finally, we can calculate the velocity of the JWST at the point where it stops after being released by the Ariane 5 rocket.

Since the JWST stops at L2, the centripetal force required to keep it in orbit is zero. Therefore, the velocity at this point is also zero.

In summary, we need to calculate the total gravitational force acting on the JWST at L2 by summing the gravitational forces from the Sun and the Earth. This total gravitational force should be equal to the centripetal force required to keep the JWST in orbit. At the point where the JWST is released by the Ariane 5 rocket, it reaches L2 and stops, so its velocity at this point is zero.

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Answer:

the answer is mass divided by volume

Answer:

Mass divided by volume

Explanation:

Edgen answer 2020-2021

Answer:

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance.

Answer:

70m/s2

Explanation:

acceleration is equal to force over mass,

a=4200/60

= 70m/s2

Answer:

Three (3).

Explanation:

The octet rule is a rule in chemistry that states that, chemical elements would either gain or loss electrons in their outermost shell in order to attain a stable electronic configuration i.e having eight (8) valence electrons in their outermost shell such as chemical elements found in group 8 (2-8-8) known as noble gas.

A phosphorus atom needs to gain three (3) electrons to achieve a full octet because the atomic number of phosphorus is 15 and as such it has the electronic configuration of 2-8-5 and needs three electron in order to become a stable element.

Explanation:

\(Σf = ma\)

This means the sum of all forces acting on an object = mass times accleration so first, let find the ma.

The mass is 9 kg and the acclereation is 2.0 m/s^2.

\(Σf = 9(2)\)

which equals

18 N.

So the mass times accleration equal 18 N.

So now what are forces acting on the box?

Since the box isn't levitationg nor falling, the vertical forces, mg and normal force cancel out to 0. so we only have horinzontial forces.

The push force is 20 N and the friction force is considered negative so we have

\(p - f = 18\)

p is 20 so we get

\(20 - f = 18\)

\( - f = - 2\)

\(f = 2\)

So the friction force is 2 N

p is the push force and that us

For the free body diagram, draw a square, and draw arrows from the center of the square in all 4 ways.

Make sure the vertical arrows are equal in length to show they cancel out.

The right horinzontial arrow should be 20 N and the left arrow should be 2 N

The force of friction on the wagon is equal to 2.0 N.

Frictional force can be defined as the force generated by two surfaces that contact and slide against each other. Frictional forces are affected by the angle, the surface texture, and the position of the object.

Friction can be defined as the force that slows down the movement when one surface comes in contact with another surface. The mechanical advantage decreases by friction the ratio of output to input is reduced because of friction.

The fractional force can be expressed as follows:

F = μ mg

Given, the mass of the wagon, m = 9.0 Kg

The acceleration of the wagon, a = 2.0 m/s²

The applied force on the wagon, F = 20 N

The frictional force can be calculated as:

\(F - F_k = ma\)

\(F_k= F-ma\)

\(F_k\) = 20 - 9 × 2.0

\(F_k = 2.0 N\)

Therefore, the force of friction is 2.0 N.

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Answer:

microwave, and the sun

Explanation:

the microwave uses radiation waves to heat the food, the sun has gamma rays which are also radiant

Correct choices are

Every material on the earth releases radiation of different frequency and wavelengths.

Let us consider each of the choices one by one.

Earth is heated by energy from the Sun.

A hot dog is held over a fire and gets warm.

Soup is heated in a microwave. YES

Water is boiled in a pot on a stove burner.

Hence the correct choices are

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The vectors are said to be equal if they have same magnitude as well as same direction.

In case of C and G,

The direction of both the vectors are same but the magnitude of G is more than C.

Thus, C and G are not equal vectors.

In case of E and D,

Both the vectors have opposite direction to each other and the magnitude of D is more than E.

Thus, E and D are not equal vectors.

In case of B and C,

Both the vectors have same direction but the magnitude of C is more than the magnitude of B.

Thus, B and C are not equal vectors.

In case of A and H,

Both the vectors have same direction and both the vectors cover three boxes, thus, the magnitude of the vectors is same.

Hence, A and H are equal vectors.

Answer:

I think your answer would be D

Explanation:

Before you back under a semi-trailer when coupling your tractor, the nose of the trailer should be at a height that matches the fifth wheel height on your tractor.

This will ensure a proper and secure connection between the tractor and the trailer, allowing for safe transportation. It is important to always follow the manufacturer's recommendations and safety guidelines when coupling a tractor and trailer.

Before you back under a semi-trailer when coupling your tractor, the height of the trailer's nose should be slightly lower than the fifth wheel on the tractor. This allows for proper alignment and connection between the tractor and the trailer during the coupling process.

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Answer:

water

Explanation:

water is 1000 kg/m3 while air is 1.225 kg/m3

The speed is 42 m/s at which squid rejects the water.

The maximum horizontal range that squid can achieve is 1.25 m

What is a drag force?

Drag force is a force acting opposite to the relative motion of any object moving concerning a surrounding fluid. This exists between two fluid layers or between a fluid and a solid surface.

Here,

mass of the water, m1 = 3.0 kg

mass of the squid, m2 = 36 kg

initial speed, v2 = 3.5 m/s

(a)

According to the conservation of momentum:

m1*v1 = m2*v2

3 * v1 = 36 * 3.5

v1 = 42 m/s

It is the speed at which the squid rejects the water.

(b)

The maximum range:

R(max) = (v2) ^2 / g

where,

g=9.8 m/s^2 and launch angle is 45°

R(max) = 3.5^2 / 9.8

R(max) =  1.25 m

Hence,

The speed is 42 m/s at which squid rejects the water.

The maximum horizontal range that squid can achieve is 1.25 m

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Your question is incomplete, but most probably the full question was:

We’ve seen that squid can escape from predators by ejecting water. Some squid do this at the surface of the ocean, thus launching themselves into the air—a particularly effective escape strategy. Suppose a 36 kg squid (not including water) at rest at the surface of the water brings in and quickly ejects 3.0 kg of water to achieve a takeoff speed of 3.5 m/s; these are typical numbers.

a. At what speed does the squid eject the water?

b. If we ignore lift and drag forces as the squid flies through the air, what is the maximum horizontal range that the squid can achieve before splashing down?

When a vehicle is approaching you, it is important to dim your high-beam headlights to low beams within a distance of approximately 500 feet.

This distance provides enough time for the oncoming driver to adjust their vision and safely navigate the road. By dimming your high beams, you reduce the risk of blinding the other driver and causing potential accidents or discomfort. Maintaining proper headlight etiquette promotes safety and ensures a clear line of sight for all drivers on the road, allowing for a smoother and more secure driving experience during nighttime or low visibility conditions.

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Inelastic neutron scattering techniques can be employed to identify the positions of hydrogen molecules adsorbed in a crystalline porous metal-organic framework material.Option (e)

Single-crystal X-ray diffraction and single-crystal neutron diffraction can also provide information on the positions of hydrogen molecules in MOFs, but they require the growth of large, high-quality single crystals, which can be difficult and time-consuming. X-ray powder diffraction and neutron powder diffraction can provide structural information on MOFs, but they are not as sensitive to the positions of hydrogen atoms as INS.

In summary, INS is a powerful technique for identifying the positions of hydrogen molecules in MOFs, and is particularly useful when single crystal growth is challenging.

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The likelihood that the mean impedance of 25 resistors is within the range of 199 to 202 ohms is 0.842, as per the principle of probability.

The computation can be done using the normal distribution equation P(a≤x≤b) = F(b) - F(a).

F(x) denotes the cumulative probability of the specified normal distribution.

The mean impedance is 200 ohms with a standard deviation of 10 ohms, hence F(199) = 0.155 and F(202) = 0.997. Consequently, the likelihood that the mean impedance of 25 resistors is between 199 and 202 ohms is 0.997 - 0.155 = 0.842.

The probability that the total impedance will be below 5100 ohms is 0.999. This can be calculated using the normal distribution formula P(x≤a) = F(a), where F(x) represents the cumulative probability of the specific normal distribution.

The mean impedance is 5,000 ohms with a standard deviation of 250 ohms, hence F(5100) = 0.999. Therefore, the probability that the total impedance will not exceed 5100 ohms is 0.999.

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Answer:

Centrifugal Force = 45.65N

Explanation:

Given the following data;

Mass, m = 80kg

Radius = 487m

Velocity = 60km/h to m/s = 60*1000/3600 = 16.67m/s

To find the centrifugal force;

Centrifugal Force = mv²/r

Substituting into the equation, we have;

Centrifugal Force = 80*16.67²/487

Centrifugal Force = 80*277.89/487

Centrifugal Force = 2223.12/487

Centrifugal Force = 45.65N

Answer:

(B)   hot air is lighter than cold air

P V = N R T       ideal gas equation

If T (temperature) is smaller then N (number of moles) must be larger if other quantities remain constant,

Answer:

The short answer is that it takes sunlight an average of 8 minutes and 20 seconds to travel from the Sun to the Earth.

Explanation:

how long does it take sunlight to reach Earth? This sounds like a strange question, but think about it. Sunlight travels at the speed of light. Photons emitted from the surface of the Sun need to travel across the vacuum of space to reach our eyes. If the Sun suddenly disappeared from the Universe (not that this could actually happen, don't panic), it would take a little more than 8 minutes before you realized it was time to put on a sweater.

The De Broglie wavelength can be obtained as 1.68 * 10^-8 m.

Quantum mechanics uses the DeBroglie wavelength to illustrate how matter behaves like a wave. It is named after French scientist Louis de Broglie.

According to DeBroglie's hypothesis, every particle has both particle-like and wave-like characteristics, including protons, electrons, and even large objects like tennis balls.

We know that;

λ= h/mv

λ= De Broglie wavelength

h = Plank's constant

m = mass of the electron

v = velocity of the electron

Then;

λ= 6.6 * 10^-34/9.11 * 10^-31 * 4.3 * 10^6

λ= 6.6 * 10^-34/3.917 * 10^-26

= 1.68 * 10^-8 m

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