Suppose you are watching TV on a big screen. For fraction of a second, the words drink cola flash on the screen. You do not perceive the words drink cola because it is beyond your absolute threshold. What is the message drink cola?

Answer:

a weak interaction between particles the result from mass

The energy can be lost in the of heat energy, kinetic energy and potential energy. If lenore pushes a box up the plane and into her truck.

First of all "energy lost" is an inappropriate word used here. Energy can neither be lost nor be generated. It only transforms from one form to another.

The plane on which the box is being pushed up is inclined. There are different types of energy transformation takes places. Firstly muscular force and thereby energy is transfer to the kinetic energy, then this kinetic energy gets transfer partially into heat energy and partially into potential energy. Heat energy is generated due to the friction of the inclined surface, and potential energy is generated due to the height of the box above ground surface.

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If the same pressure is exerted over a greater area, less force will result. Option A

This is because pressure is defined as force per unit area. If the area over which the pressure is exerted is increased, then the same amount of force is distributed over a larger area, resulting in a decrease in pressure.

This decrease in pressure results in a decrease in the force that is exerted.

A simple way to visualize this is to imagine pressing your hand against a wall. If you press with a small area, such as the tip of your finger, you will feel a greater force against your finger. However, if you press with the palm of your hand, which has a larger area, you will feel less force against your hand.

This principle is used in many everyday applications. For example, car tires are inflated to a certain pressure to distribute the weight of the car over a larger area, resulting in less force exerted on the road and better traction.

Similarly, snowshoes distribute the weight of a person over a larger area, allowing them to walk on top of deep snow without sinking in. So Option A is correct.

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Answer:

True

Explanation:

A scientific theory is a phenomenon that describes the explanation of a given fact or observation. Using the scientific method, a hypothesis/tentative explanation is given, which is tested via an experiment. If the hypothesis is tested to be true by substantial evidence, it becomes a SCIENTIFIC THEORY, which is an accepted explanation for a factual occurrence.

Hence, it can be said that a SCIENTIFIC THEORY is a hypothesis found to be true and backed up by repeatable experiments. It should be noted that a theory is not a fact, however, a scientific theory explains or interprets a scientific fact.

Therefore, the statement that a scientific theory is a summary of fact and states a predictable relationship or observation under specific conditions is TRUE.

Newton's laws of motion describe how seatbelts and airbags work in a car during a collision.

Newton's first law of motion, also known as the law of inertia, states that an object at rest will stay at rest and an object in motion will continue to move at a constant velocity unless acted on by an external force. Because of this rule, a passenger in a vehicle will continue moving forward at the same speed as the vehicle before the collision.

Seatbelts provide an external force that works against the motion of the occupants and slows them down, decreasing the risk of injury. The seatbelt exerts a force that brings the occupant and the vehicle to a halt, keeping them from being thrown forward. This is why wearing a seatbelt while driving is so important.

Airbags, on the other hand, employ Newton's second law of motion, which says that force equals mass times acceleration. During a collision, the airbag quickly inflates, providing a cushioning effect that reduces the occupants' forward momentum. This lengthens the time required to bring the occupants' forward motion to a halt, reducing the force acting on them and avoiding injuries, especially to the head, chest, and neck.

To summarize, both seatbelts and airbags rely on Newton's principles of motion to provide protection in the event of a collision. Seatbelts work against the motion of the occupants, while airbags reduce the force acting on them, demonstrating the application of the first and second laws of motion, respectively.

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Answer:

60.905 kg!

Explanation:

The formula is m = 2KE / v^2 (m= mass, KE= kinetic energy, v= velocity)

m = 2(955) / 5.6^2

m = 1910 / 31.36

m = 60.905 kg

Answer:

The mineral's hardness is greater than 4 but less than 5.5 on the Mohs hardness scale.

Answer:

hi my name is antonette Jane S pascua please help me my question thank you for your answer

Answer:

The car is 140 km south from where it started.

Explanation:

The  value in terms of 1m of oil is 1.25

To convert the pressure at a point from 1 meter of water to its equivalent value in meters of oil, we can use the following formula:

Pressure = height × density × gravity

Let's first find the pressure exerted by 1 meter of water.

1 g x 0.8 = 0,8

1 x g x 1m = 0.8 x g * h2

We are to solve for h2

h2 = 1 / 0.8

= 1.25

Hence tghe  value in terms of 1m of oil is 1.25

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Given that distance of moon from the earth is, R= 3.84 x 10^8 m

Also, time taken to complete one revolution is, T= 23.7 days = 2047680 seconds

Mass of the moon is, m= 7.347 Kg

To find the centripetal acceleration,

Substituting the values, we get

To calculate the distance on the screen between the second-order maxima and the central maximum, we can use the grating equation:

d * sin(θ) = m * λ

Where:

d is the slit spacing,

θ is the angle of diffraction,

m is the order of the maximum,

and λ is the wavelength of light.

In this case, we are interested in the second-order maximum (m = 2), and the light is incident normally on the grating (θ = 0). Therefore, the equation simplifies to:

d * sin(0) = 2 * λ

Since sin(0) is equal to 0, the equation further simplifies to:

0 = 2 * λ

Now we can solve for the wavelength λ:

λ = 0.600 μm = 0.600 * 10^(-6) m

Substituting the given values into the equation, we have:

0 = 2 * (0.600 * 10^(-6) m)

Next, we can find the slit spacing d:

d = 1.60 μm = 1.60 * 10^(-6) m

Finally, we can calculate the distance on the screen between the second-order maxima and the central maximum:

Distance = d * m = (1.60 * 10^(-6) m) * 2 = 3.20 * 10^(-6) m

So, the distance on the screen between the second-order maxima and the central maximum is 3.20 * 10^(-6) meters or 3.20 micrometers.

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Answer:

neutron.

Explanation:

subatomic particles include,

neutron.

proton.

electron.

hope it helps. :)

Starting from the center and moving outward, the proper sequence of the layers of the Earth is as follows:

Inner Core: The innermost layer of the Earth is the solid inner core. It is primarily composed of solid iron and nickel and has a high temperature and pressure.

Outer Core: Surrounding the inner core is the outer core, which is a liquid layer composed of molten iron and nickel. It is responsible for generating the Earth's magnetic field through convection currents.

Mantle: Above the outer core is the mantle, which is the thickest layer of the Earth. It consists of solid rock, but it is capable of slowly flowing over long periods of time due to its high temperature and pressure. The mantle is further divided into the upper mantle and the lower mantle.

Crust: The outermost layer of the Earth is the crust. It is composed of solid rock and is divided into two types: the continental crust, which forms the continents, and the oceanic crust, which lies beneath the ocean basins.Overall, the sequence of layers is: Inner Core -> Outer Core -> Mantle -> Crust.

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The three men will meet at the starting point after 11 hours.

To determine when the three men will meet at the starting point, we need to find the time it takes for each man to complete one full lap around the circular track.

Let's calculate the time it takes for each man to complete one lap:

Man 1:

Speed of Man 1 = 4 km/hr

Circumference of the track = 11 km

Time taken by Man 1 to complete one lap = Circumference / Speed

Time taken by Man 1 = 11 km / 4 km/hr = 2.75 hours

Man 2:

Speed of Man 2 = 5.5 km/hr

Time taken by Man 2 to complete one lap = Circumference / Speed

Time taken by Man 2 = 11 km / 5.5 km/hr = 2 hours

Man 3:

Speed of Man 3 = 8 km/hr

Time taken by Man 3 to complete one lap = Circumference / Speed

Time taken by Man 3 = 11 km / 8 km/hr = 1.375 hours

Now, we need to find the smallest common multiple (LCM) of these three times to determine when they will meet at the starting point.

The LCM of 2.75 hours, 2 hours, and 1.375 hours is 11 hours.

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The given statement "Average velocity can be expressed as (Δs/Δt) where s(t) is the position function." is True. Average velocity is defined as the change in position over a given time interval.

This can be expressed mathematically as (Δs/Δt), where Δs is the change in position and Δt is the change in time. The position function, s(t), gives the position of an object at any given time t. By calculating the difference in position over a specific time interval, we can determine the average velocity of the object during that interval. This calculation is a fundamental concept in calculus and physics, as it allows us to understand how objects move and change over time. Therefore, it is true that average velocity can be expressed as (Δs/Δt) where s(t) is the position function.

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Use the work formula:

W = Fd

Replacing we have:

W = 1 N * 1 m

Resolving operation:

W = 1 J

The work efectuated is 1 Joule.

The second-degree polynomial that satisfies the given conditions is:

p(x) = 5x^2 + x - 3

To find the polynomial, we need to integrate the given information. We know that:

p'(x) = 2ax + b (1) [where a and b are constants]

p''(x) = 2a (2)

From the given information, we have:

p(1) = 2 (3)

p'(1) = 6 (4)

p''(1) = 10 (5)

Using (1) and (2), we can solve for a and b:

p'(1) = 2a + b = 6 [substituting x=1 in (1)]

p''(1) = 2a = 10 [substituting x=1 in (2)]

Solving for a and b, we get:

a = 5

b = 1

Now we can write the polynomial:

p(x) = ax^2 + bx + c

where a = 5, b = 1, and c is an unknown constant. To solve for c, we use the fact that p(1) = 2:

p(1) = a(1)^2 + b(1) + c = 2

Substituting the values of a and b, we get:

5 + c = 2

Solving for c, we get:

c = -3

Therefore, the second-degree polynomial that satisfies the given conditions is:

p(x) = 5x^2 + x - 3

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(a) The minimum time interval needed before it can come to rest is t = 10.17 sec for a jet which is travelling at a a speed of 87 m/s, and its acceleration can have a maximum magnitude of 8.55 m/s2

(b) yes the jet can land on a small tropical island airport where the runway is 0.800 km long.

(c) The jet is safe to land.

Acceleration is the rate at which an object's velocity with respect to time changes. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force acting on an object determines the direction of its acceleration. According to Newton's Second Law, an object's acceleration is the result of two factors working together: the object's mass, which varies depending on the materials it is made of, and the net balance of all external forces acting on it. The magnitude of an object's acceleration is inversely proportional to the object's mass.

The SI unit for acceleration is \(m/sec^{2}\).

Use the formula to calculate the time required to stop the jet

v = u + at

0 = 87 + (-8.55)t

t = \(\frac{87}{8.55}\)

t = 10.17 sec

Use the following formula to calculate the distance travelled by the jet is,

\(x = ut + \frac{1}{2} at^{2}\)

= \(( 87 \times 10.17) + \frac{1}{2} (-8.55) (10.17)^{2}\)

= 884.79 - 884.31

=.48m

Yes, the can land on a small tropical island airport where the runway is 0.800 km long.

The jet is safe to land.

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Newton's third law of motion states that for every action, there is an equal and opposite reaction. The action-reaction pair is used to describe the interaction between two objects. Therefore, when a car is speeding up as it drives along a level road, an action-reaction pair occurs.

An action-reaction pair is a pair of forces that are equal in strength and opposite in direction. When an object exerts a force on another object, the second object exerts an equal and opposite force on the first object. The action-reaction pair when a car speeds up as it drives along a level road can be explained as follows: Action force: The car exerts a force on the road in the forward direction. This is the action force. Reaction force: The road exerts a force on the car in the backward direction. This is the reaction force.

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The centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8). Formulae used to find the centre of mass are as follows:x bar = (1/M)*∫∫∫x*dV, where M is the total mass of the system y bar = (1/M)*∫∫∫y*dVwhere M is the total mass of the system z bar = (1/M)*∫∫∫z*dV, where M is the total mass of the systemThe region bounded by y=9-x^2 and y=5/2x, and the z-axis is shown in the attached figure.

The two curves intersect at (-3, 15/2) and (3, 15/2). Thus, the total mass of the region is given by M = ∫∫ρ*dA, where ρ = density. We can assume ρ = 1 since no density is given.M = ∫[5/2x, 9-x^2]∫[0, x^2+5/2x]dAy bar = (1/M)*∫∫∫y*dVTherefore,y bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]y*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]ydA...[1].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore,y bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]y*dxdy...[2].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.Substituting the values and evaluating the integral, we get y bar = (1/M)*[(9-5/2)^2/2 - (9-(15/2))^2/2]= (1/M)*(25/2)...[3].

Also, the x coordinate of the center of mass is given by,x bar = (1/M)*∫∫∫x*dVTherefore,x bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]x*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]xdA...[4].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore, x bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]xy*dxdy...[5].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.

Substituting the values and evaluating the integral, we get x bar = (1/M)*[63/8]= (1/M)*(63/8)...[6]Thus, the centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8).

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Answer:

Large spherical regions from which no light is detected

Explanation:

A black hole is an object that has an extremely high density such that it possesses very powerful gravitational force that prevents the escape of all objects including light from it, and consumes nearby objects.

Due to the power of the gravitational force of a black hole, at the center, objects are infinitesimally compressed resulting in the inapplicability of the concept of space and time and the location is known as a singularity

Therefore, the search for black holes involves searching for large spherical regions from which no light is detected.

Answer:

The student’s reasoning in the investigation is flawed because the student only tested each magnet one time, which is not sufficient to conclude that the bar magnet is the strongest. To accurately determine which magnet is the strongest, the student should have tested each magnet multiple times and taken an average of the results to ensure the reliability of the data. Therefore, option D is the correct answer.

As for Item 5, if gravity were nonexistent, the brick would float away without the force of gravity to bring it back down. Therefore, option A is the correct answer.

Answer:

Explanation:

it depends upon what state they are in like in motion or res

The weight of the wooden pole is 500 N. The correct answer is option A.

To determine the weight of the wooden pole, we can use the principle of moments. The pole is balanced horizontally when the sum of the clockwise moments is equal to the sum of the counter clockwise moments.

When pivoted at a point 2 m from end P, the weight of the pole can be balanced by the moment created by the weight of the pole itself. Let's denote the weight of the pole as W_pole. The clockwise moment created by the weight of the pole is W_pole * 2 Nm.

When pivoted at a point 2 m from end Q, a weight of 500 N is needed to balance the pole horizontally. The counterclockwise moment created by the weight of 500 N is 500 N * 2 Nm.

Since the pole is balanced horizontally in both cases, the clockwise moment and the counter clockwise moment must be equal.

W_pole * 2 Nm = 500 N * 2 Nm

Simplifying the equation:

W_pole = 500 N

Therefore, the weight of the wooden pole is 500 N. The correct answer is option A.

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