A museum curator moves artifacts into place on many different display surfaces. Consider the following table giving approximate values for coefficients of friction: – schomer – (HHSPhy4F18) 1 Materials μs μk steel on steel 0.74 0.57 aluminum on steel 0.61 0.47 rubber on dry concrete 1.0 0.8 rubber on wet concrete – 0.5 wood on wood 0.4 0.2 glass on glass 0.9 0.4 waxed wood on wet snow 0.14 0.1 waxed wood on dry snow – 0.04 metal on metal (lubricated) 0.15 0.06 ice on ice 0.1 0.03 Teflon on Teflon 0.04 0.04 synovial joints in humans 0.01 0.003 What is Fs,max for moving a 167 kg alu- minum sculpture across a horizontal steel platform? The acceleration of gravity is 9.81 m/s2 . Answer in units of N.

4 Kilometers, North, would be the answer.

The path followed by a projectile is called its trajectory. (C)

In the most common school situation ... with gravity but without air resistance, the trajectory of a projectile is the shape of an inverted parabola (nose  pointing up).  That's the result of constant horizontal velocity and accelerated vertical velocity.

Answer:

Trajectory

Explanation:

Trajectory is the path followed or traced by a projectile.

It follows a parabola shape. That is the shape got in javeline.

#1

When rocket is launched from the moon then there will be two forces on the rocket

1. Due to ejected gases the reaction force on rocket in forward direction

2. due to gravitational attraction of moon

So here we need to draw two arrow on its FBD in which first arrow is in the direction of motion of rocket which will be the reaction force on it while other arrow is opposite to its motion which is due to gravitational attraction force.

So answer would be TWO

#2

When crate is placed on the floor then in order to lift the crate upwards we always need an external force that will counter balance the normal force of crate.

Which mean if we make the normal force to be zero then crate will lift upwards and in order to make it zero we need to apply same force as that of normal force

So here the normal force is given as 150 N so we also need to apply 150 N force in order to lift it upwards

#3

If a person lift a box upwards by some force then we can say by force balance

Force applied by person + Normal force = Weight of the box

[tex]F_{app} + F_n = mg[/tex]

we will plug in all values in it

[tex]F_{app} + 150 = 30 * 10[/tex]

[tex]F_{app} = 300 - 150[/tex]

[tex]F_{app} = 150 N[/tex]

So we applied 150 N force on it

#4

In all cases we need to use force balance

like in case 3

[tex]T + T = W[/tex]

[tex]2T = W[/tex]

[tex]T = \frac{W}{2}[/tex]

so here in 3rd case tension is half of the weight

which will be the least tension in all cases

so answer is CASE 3

Once the steel ball is thrown, the primary force acting upon it is gravity, which pulls the ball downwards. Additionally, inertia ensures the ball continues moving in an upward and then downward direction. After the ball has left the child's hand, it's considered to be in a state of free-fall.

In the situation where a child throws a steel ball straight up, the primary force acting on the ball once it leaves the child's hand is gravity. Once the ball has left contact with the child's hand, the ball is in a state of free-fall. This motion is one-dimensional and has a constant acceleration of magnitude g.

The ball continues moving upward, then downward due to inertia, the tendency of an object in motion to stay in motion. Please note that no object can exert force on itself; therefore, the child's hand no longer accelerates the ball or exerts force on it once contact is lost.

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Answer: option D. the ratio of the population of male deer is not constant.

Explanation:

The bar graph permits to compare the results for two different populations: male and female deer in a very easy visual way.

These features are remarkable:

        This discards the option A, which states that the population of male deer increases each decade from 1961 to 2011.

        This discards the option B. which states that when the polulation of male deer increases, the poluplation of female deer also increases.

Answer:

The answer is D

Explanation:

I got it right

A C) closed circuit is a continuous loop that allows the flow of current along its intended path.

A continuous loop that allows the flow of current along its intended path is closed circuit. The correct option is C.

A circuit consists of a voltage source along with resistors and the current flows from  positive to the negative terminal of the battery.

When the circuit is open , there will be no current flowing in the circuit, but if closed, there will be continuous flow of current.

Thus, the correct option is C.

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Answer: Option A: The spots on the balloon move away as the balloon is inflated.

one of the scientific models describes the galaxies are moving apart as the universe is expanding. This expansion theory came from the observation of red-shifted spectrum from all the directions indicating that the galaxies are moving away.  This can be understood from the inflated balloon. Initially spots can be marked using a colored pen on the balloon.On inflating the balloon, it would be noticed that the spots on the balloon move away. Actually the position of the spots won't change, but the distance between the spots would expand. This is a good model to explain the expanding universe. The galaxies are neither moving in any random direction nor moving forward. So, rest of the options are not good models to explain the theory.

a) A football coach starts at the 35-yard line and walks to the 15-yard line.

So, the first amount of displacement covered is calculated as below.

Displacement = final point-initial point

D1 = 35 - 15 = 20 yards.

b. He turns around and walks to the 40-yard line.

Coach starts from the 15-yard line and walks to the 40-yard line, so his displacement is calculated as below

D2 = 40 - 15 = 25 yards.

3. He turns around again and walks back to the 0-yard line.

Coach starts from the 40-yard line and walks to the 0-yard line, so his displacement is calculated as below

D3 = 40 - 0 = 40 yards.

4. He turns around one more and walks back to the 25-yard line.

Coach starts from the 0-yard line and walks to the 25-yard line, so his displacement is calculated as below

D4 = 0 + 25 = 25 yards.

The total distance walked is

D = D1 + D2 + D3 + D4 = 20 + 25 + 40 + 25 = 110 yards.

Hence average speed of the coach is

Spee = 110[yards]/10[min] = 11 [yards/min].

To calculate the average velocity for each interval, divide the distance traveled by the time taken. To calculate the average velocity for the entire motion, add up all the distances traveled and divide it by the total time taken.

In this question, we are given the distances and times for different intervals of a football quarterback's motion. To calculate the average velocity for each interval, we divide the distance traveled by the time taken for that interval. For the first interval (15.0 m in 2.50 s), the average velocity is 6.0 m/s. For the second interval (-3.00 m in 1.75 s), the average velocity is -1.7 m/s. And for the third interval (21.0 m in 5.20 s), the average velocity is 4.0 m/s.

To calculate the average velocity for the entire motion, we add up all the distances traveled and divide it by the total time taken. In this case, the total distance is 15.0 m + (-3.00 m) + 21.0 m = 33.0 m and the total time is 2.50 s + 1.75 s + 5.20 s = 9.45 s. Therefore, the average velocity for the entire motion is 33.0 m / 9.45 s = 3.49 m/s.

Meter is standard unit for measurement of length. Larger unit used for measurement of length is Kilometer.

Since,

1 Kilometer= 1000 meter

or

1 meter = 1/1000 Kilometer

therefore,

35 meter = 35/1000 Kilometer

35 meter = 0.035 Kilometer

35 m is equivalent to 0.035 km.

35 meters is equivalent to 0.035 kilometers, which is found by dividing the number of meters by 1000.

To convert meters to kilometers, you need to know the basic conversion rate: 1 kilometer (km) is equivalent to 1000 meters (m). Therefore, to convert meters to kilometers, you divide the number of meters by 1000.

35 meters is equivalent to 0.035 kilometers because:

35 m / 1000 = 0.035 km

None of the other options (35000 km, 35000 km, 0.0035 km) are correct. The correct conversion is to simply divide the number of meters by 1000 to get the kilometers.

Answer: B

Explanation: Because serotonin influences mood, social behavior, sleep, and memory. Low levels of this will cause attention deficit hyperactivity disorder or (ADHD).

Final answer:

ADHD is a complex disorder with genetic, neurological, and environmental causes. While low levels of serotonin may contribute to neurotransmitter imbalances in ADHD, it's important to consider the disorder's multifaceted nature.

Explanation:

Research into the cause of Attention Deficit Hyperactivity Disorder (ADHD) reveals it is a complex disorder with multiple potential causes. While the options provided focus on neurotransmitters, it's essential to understand that ADHD involves a combination of genetic, neurological, and environmental factors. Specific genes associated with neurotransmitters like dopamine and serotonin have been linked to ADHD. Neuroimaging studies show structural differences in the brain, notably in areas responsible for impulse control and organization, hinting at the neurological underpinnings of ADHD. Moreover, environmental factors such as exposure to toxins and maternal substance use during pregnancy contribute to the disorder's development. However, among the listed options, low levels of serotonin B. are closely related to the theory of neurotransmitter imbalance in ADHD, understanding that it is just one piece of a much larger puzzle.

as per the reaction we have

[tex]H_2 + O_2 ---> H_2O_2[/tex]

so here 1 mole of H2 react with 1 mole of O2 and give 1 mole of H2O2 as the product

now we will find the moles of given reactant

moles of H2

[tex]n_1 = \frac{2}{2} = 1 mole[/tex]

moles of O2

[tex]n_2 = \frac{32}{32} = 1 mole[/tex]

so here both present in 1 mole each hence the product will also formed 1 mole

so here we have

[tex]n = 1 mole[/tex] H2O2 will form

so mass of the product

mass = moles* molecular mass

[tex]m = 1 * (2 + 32)[/tex]

[tex]m = 34 g[/tex]

so the product mass will be 34 g

If there is no air resistance, then both of those balls ... as well as a feather, a piece of paper, a handkerchief, a bowling ball, a fried egg, a hammer, a car, a school bus, an airplane, a diesel locomotive, a computer, and a battleship ... if dropped at the same time from the same height, fall together, and hit the ground at the same time.  We've known this for about 400 years, since Galileo.

According to Galileo's law of falling bodies, in a vacuum with no air resistance, all bodies fall at the same rate regardless of their mass. Therefore, both the 300g and 100g balls will hit the ground at the same time.

The two balls, one weighing 300 grams and the other 100 grams, when dropped from a tower, will hit the ground at the same time. This is based on Galileo's law of falling bodies, which states that in a vacuum, where there is no air resistance, all bodies, no matter their mass, fall at the same rate. Therefore, the weight of the balls does not affect the time it takes for them to reach the ground.

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Purple finches, chickadees,cardinals,blue jays,woodpeckers,red polls,juncos,goldfinches,and red crossbills.

i think the answer is A

For the stunt car, additional measurement of the angle of projection and air resistance are required for accurate prediction. In the case of vector quantity of A, using Pythagorean theorem and trigonometric calculations, it would be 5cm at a certain angle according to the coordinate system.

The first question involves the physics of projectile motion. Based on the given parameters (height of the cliff, speed of the car leaving the cliff, and the mass of the car), the stunt coordinator still needs to collect more measurements.

The missing parameters are the angle at which the car leaves the cliff and the air resistance, which can be a major factor in the car's trajectory, particularly in a high-speed situation like this. Without these, it's impossible to accurately predict where the car will land.

As for the second question, which involves vector quantities, vector A’s magnitude can be realized by Pythagorian theorem.

Given that the x-component is 3 cm and the y-component is 4 cm, the magnitude of A is √(3² + 4²), which is 5 cm, providing a vector quantity of 5 cm at an angle. The specific angle depends on the orientation of the coordinate system but can be calculated using trigonometric functions.

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Answer:

D. 6 to 7 s

Explanation:

When object is moving away from its reference point then its motion is known as positive motion

And when object moves towards the reference point then its motion is termed as negative motion because here the distance with respect to reference point is decreasing with time

so by the graph we can say that

object velocity is positive between

t = 0 to t = 6 s and t = 12 to t = 20 s

so in above interval of time it is moving away

while during time interval of t = 6 s to t = 7 s the motion its velocity is negative and hence it will move towards reference point

Applying a 50 N force to the box will accelerate it, increasing its velocity over time as long as the force is applied and this can be measured by a speedometer. The displacement of the box can also be calculated using physics equations of motion.

When a force of 50 N is applied to the box, Newton's Second Law F=ma (Force equals mass times acceleration) is used. Acceleration is calculated by dividing the force by the mass of the box. Let's assume a box of 10kg, in this case, the box will have an acceleration of 50/10= 5 m/s² right.

This acceleration changes the velocity of the box over time. If the box was initially at rest, its velocity will increase at a rate of 5 m/s every second in the direction of the force applied.

Displacement, which is a measure of 'how much ground the object has covered' under the action of the force, can be calculated by integrating the velocity, but in this case, since the initial speed is zero and the acceleration is constant, we can also use the equation of motion: d = 0.5 * a * t², where t represents the time for which the force is applied. As for the speedometer, it would show an increasing speed over time as long as the force is being applied.

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C) E= kq/d^2

Hoped this helped

Answer:

The correct answer option is C. E = kq / d^2

Explanation:

Electric field strength is a vector quantity which means it has both the magnitude and a direction.

It can be defined as the strength of electrical force per unit charge at any given point in the electric field and can be denoted by E.

Therefore, the formula for the electric field strength is:

E = [tex]\frac{k .Q }{d^2} [/tex]

Description:

It often has molten appearance due to its heterogeneous composition.

Rock or mineral:

It is a rock.

Mineral has a unique specific makeup and always has the same composition.

So it is rock due to heterogeneous composition.

Description:

Atoms in all specimens have the same structure and shape.

Rock or mineral:

It is Mineral.

Mineral has a unique specific makeup and always has the same composition.

Description:

It is generally found in crystalline form.

Rock or mineral:

It is a mineral.

Description:

Every specimen varies in terms of atomic structure.

Rock or mineral:

It is a rock.

A rock is a solid, inorganic, naturally-formed substance without a particular atomic structure or chemical composition.

Answer:

Maximum height reached  = 573.73 m

Explanation:

We have equation of motion, [tex]v^2=u^2+2as[/tex], where u is the initial velocity, u is the final velocity, s is the displacement and a is the acceleration.

 Here final velocity = 0 m/s at maximum height, initial velocity = 10.6 m/s, acceleration = acceleration due to gravity = [tex]-9.8m/s^2[/tex]

 Substituting

     [tex]0^2=10.6^2-2*9.8*s\\ \\ s=5.73 m[/tex]

 So camera travels 5.73 m above after falling from blimp.

 Maximum height reached = Initial height + 5.73 = 568+5.73 = 573.73 m

A series circuit is a closed circuit in which the current follows in only one path. In a series circuit, the current through each load is the same and the total voltage across the circuit is the sum of the voltages across each load. If one component of a series circuit becomes nonfunctional, the rest of components do not work. So the circuit A is a series circuit.

Explaining the second statement :

Each resistor in a series circuit has the same amount of current flowing through it, whereas the current flowing through each resistor in a parallel circuit is different, depending on the resistance. So we can say that when resistors are connected in parallel, more current flows from the source than flow for any of them individually, so the total resistance is lower.

Series circuit has the summation of all resistances. Therefore, Circuit A is a series circuit, and also the total resistance in Circuit A is greater than that in Circuit B.

The combination of various electrical components in a definite form, to allow the flow of electric current through it, is known as an electrical circuit.

Given data -

Carla draws two circuit diagrams that connect the same components in different ways.

A series circuit is a closed circuit in which the current follows in only one path. In a series circuit, the current through each load is the same and the total voltage across the circuit is the sum of the voltages across each load. If one component of a series circuit becomes nonfunctional, the rest of the components do not work. So circuit A is a series circuit.

The resistors in a series circuit have the same amount of current flowing through it, whereas the current flowing through each resistor in a parallel circuit is different, depending on the resistance. When resistors are connected in parallel, more current flows from the source than flow for any of them individually, so the total resistance is lower.

Thus, we can conclude that Circuit A is a series circuit, and also the total resistance in Circuit A is greater than that in Circuit B.

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Answer:

1st box: Sedimentary rocks

2nd box:metamorphic rock

3rd box: igneous rock

Explanation:

Sedimentary rocks are rocks formed from weathered pieces of rocks (sediments)  which have accumulated over a period of time. An example of a sedimentary rock is limestone

Metamorphic rocks are rocks that have been reformed as a result of long term effects of high temperature and pressure. they can be said to ave changed or metamorphosed from their original state which could be igneous , sedimentary or even metamorphic. example is marble

igneous rocks are solidified hot molten magma which have become cooled after a period of time. An example is granite

similar: they are both made of elements

diff: an element is just one of itself whereas a compound is 2 or more element chemically combined

The force is much less when bunting into the in field.

Answer:

The force is much less!

Explanation: