a summer speeds up from 1.1m/s to 1.3m/s during the last 20 s of the workout. what is the acceleration during this interval

Answer:

x = 10

Explanation:

One of the properties of a rhombus is that the diagonals bisect each other at 90°

This means AC and BD are perpendicular to each other.

Let us call this intersection point as O

Then AOC forms a triangle with angles 3x - 13, 8x-7 and 90°

Since the sum of 3 angles of a triangle = 180°

(3x - 13) + (8x-7) + 90 = 180

(3x - 13) + (8x-7) = 180 - 90

(3x - 13) + (8x-7)  = 90

3x - 13 + 8x - 7 = 90

3x + 8x - 13 - 7 = 90

11x - 20 = 90

11x = 90 + 20 = 110

x = 10

Answer:

kilogram (kg)

Explanation:

Answer:

2.34

Explanation:

Answer:

2.34

Explanation:

Hope this helps! :D

To calculate the error in the ammeter we need to use Ohm's law.

According to Ohm's law V=IR where V is the potential difference, R is the Resistance and I is the current.

First, calculate the current using Ohm's law

i.e. I = V/R

I = (0.035)/0.01

I =3.5 amp

Now to check the error apply the percentage error

percentage error in current = ((calculated value - True value)/True value)*100

error in current =((3.5 - 3.25)/3.25) *100

error = (-0.25/3.25) *100

error = -7.14 %

Therefore the error in current is given by 7.14%

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Answer:

The sun does not have a solid surface, but the gases of the photosphere are thick enough to be visible. When you look at a typical image of the sun, you are looking at the photosphere. It is considered to be the sun's surface layer.

RS is a composition of rotation and reflection in the Euclidean plane E². The precise description of RS depends on the specific properties of the rotation R and reflection S.

In general, if R and S have the same axis or line of symmetry, the composition RS results in a translation. If R and S have intersecting lines of symmetry, RS yields a glide reflection. If R and S have perpendicular lines of symmetry, RS produces a rotation.

It is important to consider special cases, such as parallel lines of symmetry, coinciding axes, or perpendicular lines of reflection, as they may lead to different outcomes. The classification of isometries in E² involves understanding how rotations and reflections combine to create different transformations in the plane.

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Answer:

0 m/s or stationary

The seat in front of Lee appear to be at rest

Explanation:

When the motion of a person or object is found by comparing the person or objects motion with regards to a stationary object or an object in motion, the result is the relative motion of the person or object to the stationary or moving object

In the question, Lee is comparing the motion of the chair in front of him with regards to the motion of the chair he his sitting on.

The speed of both chairs are the same as the speed of the train in which they are attached.

Therefore, as the seats are fixed relative to each other such that there is no change in their relative position and therefore, no or 0 m/s relative velocity with each other.

Yes, it is possible for an object to be moving with a constant velocity even when force is exerted on the object. When an object is in a state of rest, a force is required to move it from that position.

Newton’s second law states that the acceleration of an object is directly proportional to the force exerted on it and inversely proportional to its mass. Thus, a larger force results in a greater acceleration of the object. If there is no force applied to the object, the object will remain stationary or move at a constant velocity.

However, if there is a force applied to the object, it will accelerate. If the force applied is balanced by an equal and opposite force, the object will continue to move with a constant velocity. An object in motion is said to be in equilibrium when the net force acting on the object is zero. When the net force acting on an object is zero, it moves at a constant velocity. Therefore, if a force is exerted on an object, it is possible for the object to be moving with a constant velocity if the forces are balanced.

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The theory of the Moon's origin that best fits with the current scientific understanding is c. a large object hit the Earth and the collision produced a filament of material that condensed to make the Moon. This theory is known as the Giant Impact Hypothesis and is currently the most widely accepted explanation for the formation of the Moon.

It proposes that a Mars-sized body collided with the Earth about 4.5 billion years ago, creating a massive impact that ejected a large amount of material into space. This material then formed a ring around the Earth, which eventually condensed to form the Moon.

This theory is supported by several lines of evidence, including the similar isotopic composition of the Earth and Moon, the Moon's low iron content, and the presence of water on the Moon that is thought to have originated from the Earth's mantle.

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Answer:

These instructions describe the delivery man's velocity.

Explanation:

Velocity is the magnitude and direction of a certain object. Both the speed and direction are given, so these instructions would be describing velocity.

The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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Answer:

By watching in the door lock

Answer:

.-. you can flip a switch and look at the bottom or the top of the door and see if there’s a light of there isn’t then flip another one.

also the other chat that we were talking on got deleted

Answer:

because the gravity around them is the same

also air resistance

Explanation:

the force of gravity tries to make everything accelerate downward at EXACTLY the same rate, no matter how light or heavy it is. This means that if you dropped a basketball and a tennis ball at the same time (from the same height) they will hit the ground at the same time (try it!)

The c function that calculates the largest whole number that is less than or equal to x is called "floor".

Here is the step-by-step explanation:

1. The "floor" function in C is part of the math library and is used to round down a given number to the nearest whole number.
2. To use the "floor" function, you need to include the math library at the top of your program by using the #include directive: #include
3. The syntax for using the "floor" function is as follows: floor(x)
4. In this syntax, "x" represents the number you want to round down.
5. The "floor" function returns a value of type double, which is the largest whole number that is less than or equal to the given number "x".
6. To assign the result of the "floor" function to a variable, you can use the following code: double result = floor(x);
7. Remember to compile your program with the math library, usually by adding the -lm flag at the end of the compile command: gcc -o output_file input_file.c -lm

The "floor" function in C calculates the largest whole number that is less than or equal to a given number "x".

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According to Law of Conservation of energy ,

One form of energy is transformed into another form of energy and there is no loss of energy in the transformation process.

The law of conservation of energy states that the energy can neither be created nor be destroyed only converted from one form of energy to the other form of energy means that the system always has the same amount of energy , unless its's added from the outside.

The only way to use energy is to transform energy from one form to another form.

example - Heat energy is transformed into Kinetic and Potential energy.

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The oceanic crust is not thicker than the continental crust. The thickness of the continental crust is typically 30 km, compared to the oceanic crust's average thickness of 7 km.

There are two different types of crust that cover the Earth: continental and oceanic. The continental crust is typically up to 25 miles thick, whereas the thinner oceanic crust is typically a little over four miles thick.

The thickness of the continental crust is normally 40 km (25 miles), whereas the thickness of the oceanic crust is only 6 km (4 miles). Different densities of lithospheric rock's impact can be seen in

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The phrase "parallel adaptive fluid–structure interaction simulation of explosions impacting on building structures" refers to a computational method used to study the effects of explosions on buildings. Let's break it down step by step:

"Parallel adaptive": This refers to the use of parallel computing techniques, where multiple processors or cores work together to solve the simulation problem faster. It allows for efficient computation of complex simulations by dividing the workload.

"Fluid–structure interaction": This term describes the interaction between a fluid (such as air or water) and a solid structure (such as a building) in a simulation. It considers how the fluid affects the structure and vice versa. In this case, it refers to how the explosion impacts the building and how the building responds to the explosion.

"Simulation of explosions impacting on building structures": This means that the simulation aims to model the effects of explosions on buildings. It can help researchers and engineers understand how buildings behave under explosive forces, and can be used to design safer structures or develop strategies to mitigate the damage caused by explosions.

The phrase refers to a computational method that uses parallel computing techniques to simulate the interaction between fluids and structures, specifically focusing on explosions impacting building structures. This simulation can provide valuable insights into the behavior of buildings under explosive forces.

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Answer:

Clouds form when below the dew point

Clouds form when the air is cooled below the dew point. The dew point is the temperature at which the air becomes saturated, meaning it can no longer hold all the water vapor it contains. The correct answer is the dew point.

When the air cools below this temperature, the excess water vapor condenses into tiny water droplets or ice crystals, forming clouds.

The dew point is an important concept in meteorology and refers to the temperature at which the air becomes saturated, leading to the formation of dew, fog, or clouds. It is the temperature at which the air can no longer hold all the water vapor it contains, resulting in the condensation of water vapor into liquid water droplets.

When air is cooled, its capacity to hold water vapor decreases. As the temperature drops, the air reaches a point where it becomes saturated, meaning the air is holding the maximum amount of water vapor it can at that specific temperature and pressure. This temperature is known as the dew point.

Therefore, while relative humidity, water content, and percent saturation are relevant factors in understanding the moisture content of the air, clouds specifically form when the air is cooled below the dew point. The correct answer is the dew point.

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Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

The claim can be Cosmetics, hygiene, and cleaning product emissions may be dangerous.

Evidence 1: Effect of Air Quality

Volatile organic compounds (VOCs), including formaldehyde, benzene, and toluene, can be found in a variety of cosmetic, hygiene, and cleaning goods. These VOCs have the potential to evaportate and cause indoor air pollution.

Environmental impact is evidence number two

Cosmetics, hygiene, and cleaning goods can have a detrimental environmental impact during manufacturing, usage, and disposal. Microplastics and certain chemicals are among the substances present in these items that may find their way into rivers and endanger aquatic life.

Evidence 3: Worker health effects

Occupational health risks can be present for workers who manufacture and produce hygiene, cleaning, and cosmetic items.

Reasoning: It is clear from the research that emissions from cosmetic, hygiene, and cleaning goods have the potential to be harmful.

Thus, this way, harmful are the emissions from cosmetics, hygiene, and cleaning products.

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Because of the cosmological principle, we can predict gravity works similarly on Earth as on Mars.

The cosmological principle says that an observer's view of the universe is independent of both the direction he looks and his location. This principle only applies to the universe's large-scale properties, but it does suggest that the world has no edge, implying that the big-bang origin took place not at a specific point in space, but instead throughout space at the exact time.

These two assumptions allow us to determine the history of the universe after a specific epoch known as the Planck time. Scientists are yet to discover what existed prior to Planck time.

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Answer:

200 kgm/s

Explanation:

momentum = mass x velocity

Answer:

1400g/L

Explanation:

Change 25ml into litres.

Use the formula d=m/v

Devide 35g by 0.025L

Answer:

non-accelerated movement

velocity versus time  a horizontal straight line.

distance versus time  gives a horizontal straight line.

accelerated motion

graph of velocity versus time s an inclined line and the slope

graph of distance versus time is a parabola of the form

Explanation:

In kinematics there are two types of steely and non-accelerated movements

In a  the velocity of the body is constant therefore a speed hook against time gives a horizontal straight line.

A graph of distance versus time is a straight line whose slope is the velocity of the body

          x = v t

In an accelerated motion the velocity changes linearly with time, so a graph of velocity versus time is an inclined line and the slope is the value of the acceleration of the body

         v = v₀ + a t

A graph of distance versus time is a parabola of the form

         x =v₀ t + ½ a t²

The changes in height of the mercury column for a temperature change of 28 ◦C is approximately 548.6 cm.

The change in height of the mercury column can be calculated using the formula:

Δh = V/A

The change in volume of the mercury can be calculated using the formula:

ΔV = V₀βΔT

where V₀ is the initial volume of the mercury, β is the volume expansion coefficient of mercury, and ΔT is the change in temperature.

The initial volume of the mercury can be approximated as the volume of a cylinder with height h and radius r, where h is the height of the capillary tube and r is the radius of the bulb:

V₀ = πr²h = π(0.29/2)²(15) = 5.76 cm³

The cross-sectional area of the capillary tube can be calculated as:

A = πr² = π(0.0041/2)² = 5.27 × 10⁻⁵ cm²

Substituting the values into the equations, we get:

ΔV = V₀βΔT = (5.76 cm³)(0.000182 (◦C)⁻¹)(28 ◦C) = 0.0289 cm³

Δh = V/A = (0.0289 cm³)/(5.27 × 10⁻⁵ cm²) ≈ 548.6 cm

Therefore, the change in height of the mercury column for a temperature change of 28 ◦C is approximately 548.6 cm.

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(a)The two balls will exert equal and opposing forces on one another during the head-on elastic impact, changing their velocities as a result. (b)the momentum of Ball A before the collision is 0.875 kgm/s.(c) The total momentum after collision 0.875 kgm/s.(d). the velocity of each Ball after the collision is 7.0m/s.  

(A) During the head-on elastic collision, the two balls will exert equal and opposite forces on each other, causing them to change their velocities. Ball A will slow down and Ball B will speed up until they both reach a new velocity after the collision.

(B) The momentum of Ball A before the collision can be calculated using the formula:

Momentum = mass x velocity

Momentum of Ball A = 0.25kg x 3.5m/s = 0.875 kgm/s

(C) The total momentum after the collision can be calculated using the principle of conservation of momentum, which states that the total momentum of a system remains constant if there is no external force acting on it. Since this is an elastic collision, the total momentum of the system before and after the collision remains the same.

Total momentum before collision = Total momentum after collision

Momentum of Ball A before collision = Momentum of Ball A after collision

Momentum of Ball B before collision = Momentum of Ball B after collision

Therefore, the total momentum after the collision is also 0.875 kgm/s.

(D) To determine the velocity of each ball after the collision, we can use the equations of conservation of momentum and conservation of kinetic energy for elastic collisions. The equations are:

Total momentum before collision = Total momentum after collision

1/2 x mass x (velocity)²before collision = 1/2 x mass x (velocity)² after collision

0.25kg x 3.5m/s = 0.25kg x vA + 0.25kg x vB

1/2 x 0.25kg x (3.5m/s)² = 1/2 x 0.25kg x (vA)² + 1/2 x 0.25kg x (vB)² (conservation of kinetic energy) Solving these equations simultaneously, we get:

vA = 0.0 m/s

vB = 7.0 m/s

Therefore, Ball A comes to a complete stop after the collision, and Ball B moves with a velocity of 7.0 m/s in the opposite direction.

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Answer:

The main force in play here is weight W, or m*g (where m is Mass and g is Gravity) that make up the main force acting downwards. This could also be referred to as the normal force.

Explanation:

From what we can see the plastic strip is at a certain angle. To which other forces, such as: friction, pull and the ones mentioned above come into play in this question.

Answer:

Explanation:

The drag depends upon mainly four factors:

1) Size of the object

2) Shape of the object

3) Speed of the object

4) Nature of the object

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Answer:

1) distance walked = 210 m

2) not sure

3) avg speed = total d/ total t = 210/52 = 4 m/s approx

4) For avg vel, use the formula - displacement/time

Explanation:

im not fully sure but i studied this last year