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Question 13(Multiple Choice Worth 2 points)


As a beginner bowler, Maria gets frustrated that her shots very rarely knock down any pins. Her Mom says that her arm movement looks awkward before releasing the ball. Maria feels like she needs to improve arm swing motion. How can Maria improve her bowling technique to be more successful?


Increase the weight of the ball to gain more control
Push the ball out away from her on the first step
Put more spin on the ball so that it curves prior to hitting the pins
Take fewer steps before releasing the ball to decrease her arm speed

Spectroscopy is the technique that astronomers most frequently apply to determine the creation of stars, planets, and other objects.

Therefore , on conclusion i.e. each element has its own unique set of wavelengths that it can absorb light at. Based on these wavelengths, astronomers can determine the composition of an object from its spectra. Spectroscopy is the technique that astronomers most frequently apply to determine the build of stars, planets, and other objects.

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4.42 m/s is minimum horizontal velocity with the cliff divers leave the top of the cliff if they are to miss the rock.

Height of the cliff is given as [tex]h=37.4m[/tex]

now the time taken by the diver to hit the surface is given as

[tex][h=1/2gt^2],[37.4=1/2\cdot9.8t^2],[t=2.73s][/tex]

Now in the same time it has to cover a distance of 12.08 m

the speed in horizontal direction

[tex][v_x=x/t],[v_x=12.08/2.73],[v_x=4.42m/s][/tex]

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Power generation technologies such as coal-fired power plants nuclear reactors and wind turbines offer various strengths and weaknesses to power generation companies and their customers.

Renewable Energy Technologies is an umbrella term for energy production from renewable sources such as solar wind, hydro hydroelectric tidal biomass biofuels, and waste and geothermal. In my opinion, the most important technical need related to energy is to make energy sources cheaper safer, and more socially acceptable.

This is reflected in an inexhaustible resource that is environmentally friendly and cheap to process to generate energy. Renewable energy sources play an important role in ensuring sustainable energy with low emissions. It is already recognized that renewable energy technologies can significantly meet power demand and reduce emissions. The country has developed sustainable methods for its energy supply in recent years.

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 The changing the compound inequality x>-3 and x <3 from "and" to "or" change the solution set Yes, if you change the type of compound inequality, the solution set will change. The solution set of the “and” compound inequality contains values for x that satisfy both inequalities, which are values between –3 and 3. The solution set of the “or” compound inequality contains values for x that satisfy either or both inequalities, which includes all real numbers.

An compound  inequality is a statement that has two inequality statements joined by either the word "or" or the word "and." "And" indicates that both statements of the compound sentence are true at the same time. This is the overlap or intersection of the solution sets of the individual sentences.  

There are two types of additive inequality.

These compound inequalities sometimes appear as two simple inequalities separated by the word AND or OR. When solving compound "and/or" inequalities, begin by solving each inequality separately.

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Answer:)

Sample Response: Yes, if you change the type of compound inequality, the solution set will change. The solution set of the “and” compound inequality contains values for x that satisfy both inequalities, which are values between –3 and 3. The solution set of the “or” compound inequality contains values for x that satisfy either or both

Explanation:) hope this helps have a great day !:).

Brainliest would be very very appreciated.

The force that prevents motion when the surfaces of two objects come into contact is known as friction. The net force acting on the body is 55N

Pseudo-force, which is a hypothetical force similar to frictional force, always acts in the opposite direction that an item is moving in.

frictional force is of 3 types. static friction, limiting friction, kinetic friction.

Frictional force is the force created when two surfaces come into contact and slide against each other. Several factors influence frictional force: The surface texture and the amount of force impelling them together have the greatest influence on these forces.

so total force acting on the body

F net= Pseudo force+ frictional force

F net= ma+ 5= 5*10+5= 55 N

m= mass

a=g=acceleration due to gravity=10m/s²

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In 3.3 hours, the distance traveled by the first airplane heading at 37.5° at 650 mph is :a = 650*3.3 = 2145 miles.

The second airplane travels

b = 650*3.3 = 2145 mile

The angle between the two airplanes is

181° - 37.5° = 143.5°

Let c =  the distance between the two airplanes after 3.3 hours.

From, Law of Cosines, obtain

c² = a² + b² - 2ab cos(143.5°)

   = 4.6 x 10⁶ + 4.6 x 10⁶

c = 5718.15mile far apart are they

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There are three layers of Earth:

Crust, mantle, and core.

Crust:  The crust is that the outmost layer of the earth, the cooled and hardened part of the planet that ranges comprehensive from more or less 5-70 klick (~3-44 miles).

This layer makes up only one of the whole volume of the planet, although it makes up the whole surface (the continents and also the ocean floor).The dilutant elements are the oceanic crust, which underlies the ocean basins at a depth of 5-10 klick (~3-6 miles), whereas the thicker crust is that of the continental crust.

Mantle: The mantle is present between the Earth's crust and its super - heated inner layer and is almost 2900 km thick.

This layer makes up 84% of Earth's total volume.

Core: The innermost and the hottest layer of Earth is known as the core.

Most liquid metals reside in this specific layer like Iron and Nickel.

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10.72 m/s^2 is the greatest acceleration that the workers can give the bucket as they pull it to the roof.

acceleration is the speed and direction change over time of a moving object. When anything moves faster or slower, it is said to be accelerating or decelerating in a straight line. Because the direction is always changing, travel on a circle accelerates even while the speed is constant.

According to Newton's second law of motion, the acceleration of an object is defined as the net force applied divided by its mass, or a = F m. This equation for acceleration can be used to calculate an object's acceleration when its mass and the net force acting on it are known.

Given,

force = 450N

mass = 42kg

acceleration = ?

a = f/m is acceleration formula.

a = 450 / 42  = 10.72 m/s^2

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Earth's orbit is currently elliptical enough to make the intensity of sunlight vary by 6 percent. the largest earth-sun distance occurs in every january.

When seen from above the Northern Hemisphere, the Earth circles the Sun at an average distance of 149.60 million kilometres in a counterclockwise manner. Earth has travelled 940 million kilometres in 365.256 days, the length of one orbit. Every twelve months, the earth orbits the sun. With the sun at one of the ellipse's foci, the orbit has a slightly elliptical form. A plane with the sun in it is defined by the orbit. It takes the Earth 149 million kilometres to travel to the sun on average. The path taken by Earth is not a perfect circle. It is oval-shaped, or elliptical. This implies that Earth is closest to the Sun at a certain point in its orbit, and farthest from the Sun at an other point.

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An electromagnet is a magnet that is made up of winding wire around an iron core. When the current flows through the coil then that iron becomes a magnet.

The electric current is measured with an ammeter,

Test the strength of the electromagnet by seeing how many paper clips it can pick up.

Increasing the coil and electric current will change the strength of an electromagnet.

Electromagnet:

An electromagnet is a magnet that is made up of winding wire around an iron core. When the current flows through the coil then that iron becomes a magnet but when the current supply is turned off so it will lose its magnetic properties.

The electric cutting edge in one part of a circuit is measured with an ammeter, which gives an analysis of the ampere. To take the measurement, an opening is made in the circuit and the ammeter is connected to that hole so that the charged debris moving across the circuit needs to bypass the meter.

Strength of electromagnet:

1. Test the strength of the electromagnet by seeing how many paper clips it can pick up.

2. Record the number of paper clips on the worksheet.

3. Disconnect the wire from the battery after testing the electromagnet.

4. Test how varying the design of the electromagnet affects its strength.

Change the strength of the electromagnet:

You can make an electromagnet more potent by doing this stuff: wrapping the coil around a bit of iron (inclusive of an iron nail) and adding extra turns to the coil. growing the contemporary flowing through the coil.

So we can conclude that a magnet that is made up of winding wire around an iron core is called an electromagnet.

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A cougar with a mass of 80 kg is standing at the edge of a cliff, then the cougar's potential energy, if the cliff is 70 m high, would be 54880 Joules.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy.

As given in the problem a cougar with a mass of 80 kg is standing at the edge of a cliff, and if the cliff is 70 meters high then we have to find the potential energy,

The potential energy of the cougar = 80×9.8×70

                                                           =54880 Joules

Thus, the potential energy of the cougar would be 54880 Joules.

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Vernier calipers have a resolution of 1/10 of an inch.

To determine the diameter of circular objects, a vernier caliper is typically employed. The vernier caliper's elongated jaws can precisely measure the circumference of rounded objects.

A vernier caliper has two scales: a moving vernier scale in addition to the primary, fixed scale. The primary scale displays millimeter readings.

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The pulling force exerted by the locomotive of mass 1.1 * [tex]10^{5}[/tex] kg on the first train car of mass 8.1 * [tex]10^{4}[/tex] kg is 81 KN

F = m a

F = Force

m = Mass

a = Acceleration

Mass of each car = 8.1 * [tex]10^{4}[/tex] kg

Since the locomotive has to pull 2 cars,

m = 16.2 * [tex]10^{4}[/tex] kg

a = 0.5 m / s²

F = 16.2 * [tex]10^{4}[/tex] * 0.5

F = 8.1 * [tex]10^{4}[/tex] N

F = 81 KN

This formula used to solve the problem is derived from Newton's second law of motion. It states that the force is the rate of change in momentum. It can also be written as,

F = dp / dt

Therefore, the pulling force exerted by the locomotive on the first car is 81 KN

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The statement that describes at t =5 second is is the object speed up.

According to Newton's second law of motion, the acceleration of a body is equal to the net force acting on the body divided by its mass, a = Fm. This acceleration equation can be used to calculate the acceleration of an object if the mass of the object and the net force acting on it are known. The only acceleration of the projectile is the downward acceleration due to gravity.

The projectile has a vertical acceleration of 9.8 m/s/s throughout its trajectory. This acceleration value is constant. This means that the vertical velocity changes by the same amount every second. Instantaneous velocity is the speed of an object at a particular point in time. If the velocity is constant the average velocity for any time interval will not differ from the instantaneous velocity at that point in time.

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The formulae that correctly represents the definition of power are -

Power is defined as the rate of doing work. Mathematically -

P = dW/dt

P = d(Fx)/dt

P = Fdx/dt

P = Fv

Given are the various formulae for power.

Now as discussed above, Power is defined as the rate of doing work. If we write it mathematically -

Power = Work done/time taken

P = W/t

or

Power = Work done ÷ time taken

P = W ÷ t

Now, we know that work done is the product of force and displacement. So, we can write -

Power = Work done / time taken

Power = (force x displacement)/time taken

P = (F x d)/t

So the given three formulae are correct -

P = W/t  ,   P = W ÷ t   ,   P = (F x d)/t

Therefore, the formulae that correctly represents the definition of power are -

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The acceleration for the whole fall  = 6 m/s²

Since the object falls freely without being pushed, we are able to conclude it falls with constant acceleration.

As per the formula,

Acceleration = [tex]\frac{Final Velocity - Initial Velocity}{Total Time}[/tex]

The Final Velocity of the space - mobile would be the total displacement it covered in the given time.

Final Velocity = 96/4 m/s

                       = 24 m/s

The Initial Velocity will be zero since as given in the image attached that the object falls freely with no external force.

Initial Velocity = 0/0 m/s

                        = 0 m/s

Total time taken = 4 sec

∴ Acceleration of the space - mobile = [tex]\frac{24-0}{4}[/tex]

                                                              = 24/4 m/s²

                                                              = 6 m/s²

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The answers include the following:

This is referred to as the long-term shifts in temperatures and weather patterns in an area at a given period of time.

Human activities are responsible as the major cause of climate change which is experienced in different parts of the world and such activities include carbon emission, deforestation etc.

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23.38 ° to the positive x-axis

Explanation

Step 1

draw the vectors

Step 2

add the vectors, ( component to component)

so

a) get the components of V1

b) components of V2

c) add

so, the magnitude of the displacement is

finally, the direction

as we have a rigth triangle

let

opposite side= 12.9

adjacent side=23.8

Now, use the tan function to find the angles

so

therefore, the direction of the resultant is

23.38 ° to the positive x-axis

I hope this helps you

Take into account that the Newton Second law is given by the following formula:

F = m·a

if you solve the previous formula for a, you obtain:

a = (1/m)·F

In the graph, you can notice that acceleration a is function of force F, just as in the previous formulation. The slope of the lines of the graph is 1/m, where m is the mass.

As you can notice in the formula for a, if m is greater, the slope is smaller.

Then, the blue line belongs to the smallest mass, the gray line belongs to the greatest mass, and the orange line is the middle mass.

Hence, you have:

- blue line - 40 kg

- gray line - 200 kg

- orange line - 100 kg

Initial position ( 4, 4 )

Add the displacements

d1 ( 2 , - 3 ) = ( 4 + 2 , 4 - 3 ) = ( 6 , 1 )

d2 ( -5,0 ) = ( 6 - 5, 1 + 0 ) = (1,1 )

d3 (1, 6 ) = ( 1 + 1 , 1 + 6 ) = ( 2 , 7 )

Final position (2, 7 )

Graph:

Two valance electrons are occupied by б-bond and four valance electrons occupy π- bonds.

Sigma and pi bonds are types of covalent bonds that differ in the overlapping of atomic orbitals. Covalent bonds are formed by overlapping the atomic orbitals.

Generally, all single bonds are sigma bonds. They can be formed via the following combination of atomic orbitals.

During the formation of pie bonds, the axes of the atomic orbitals are parallel to each other whereas the overlapping is perpendicular to the internuclear axis.

Pi bonds are generally weaker than sigma bonds.

Therefore there are two valance electrons in б-bonds and four electrons in π-bonds.

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An example of gas is Air.

Common examples of gases are oxygen, carbon dioxide nitrogen hydrogen helium steam dry ice, etc. Gases are considered much less dense than solids and liquids because the particles they contain are much more dispersed. It's a mixture of different gases. The air in Earth's atmosphere is composed of approximately 78% nitrogen and 21% oxygen.

Air also contains small amounts of other gases such as carbon dioxide neon and hydrogen. Gas is a sample of matter that conforms to the shape of the container and assumes a uniform density within the container, regardless of the amount of matter in the container, even in the presence of gravity. Gas is a substance that is completely gaseous at normal temperature and pressure.

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Answer:

throwing something heavy will take longer to throw then something light because force times time,  the heavier object will take longer to throw, and will acquire more momentum

Explanation:

Order of the three bars from the lowest to the highest melting point of the materials can be arranged from bottom to top as given below

(c) Lowest melting point - high intermolecular forces

(b) Intermediate melting point - medium intermolecular forces

(a) Highest melting point - low intermolecular forces

The matter has three different states and all of them have different melting points depending on the type of intermolecular forces in them.

So far, the melting point of a substance refers to the point or temperature at which it undergoes the transition phase to turn from a solid to a liquid state.

When a substance starts melting it reaches the intermediate point or the equilibrium point where the solid and liquid phases co-exist.

The melting point also depends on the atmospheric pressure standard is 100 kilopascal or 100 Kpa.

In general, a substance passes through three phases of melting point i.e. at first the melting point is lowest, then reaches to equilibrium point or intermediate point, and then to the highest point where it completely melts overcoming the intermolecular forces.

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Yes, the aluminum foil is impure and includes a variety of materials that have an impact on the percentage yield when added to the final product's overall weight.

Aluminum foil is used in a variety of settings, both domestic and commercial. It can be used to wrap food, bake cookies and cakes, and store food.

Additionally, many preserve delicate foods like meat and vegetables in aluminum foil.

Research has shown that aluminum foil is not a pure material since some of its particles can leach into food and cause major health issues.

Iron, zinc, gallium, and silicon microparticles are present in this foil. In addition, when heated, the coloring and paint on it have negative effects.

Additionally, it increases the overall weight of the finished product, which also has an impact on the yield percentage.

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It is difficult to hold a school bag having a strap made of a thin and strong string, due to the relatively high strain on the shoulders.

Pressure is defined as the force applied perpendicularly to an object's surface divided by the surface area over which it is applied.

There are three types of pressure.

An iron nail sinks in water because density is more than that of water.

A camel can run efficiently in the desert sand because they have wide feet, which both increase the surface area of their feet and help them balance their weight on loose sand.

An army tank weighing more than a thousand tones rests upon a continuous chain because the tank, which weighs more than one ton, is supported by a continuous chain in order to disperse the force of the tank's weight over a wide region. Because force per area equals pressure.

Cutting tools have sharp edges so that they can generate a lot of pressure and readily cut objects.

A truck or motor bus has much wider tyres because more the area ,less the pressure.

It is easier to swim in salt water than in freshwater because the fluid density, the greater the upthrust.

The skydivers float in the air because at that point, the force exerted by gravity and air resistance on your body equals zero, causing your body to float in the air.

A block of plastic released under water comes up to the water's surface because plastic has a lower density than water, hence its buoyant force is larger than its weight.

Thus, it is difficult to hold a school bag having a strap made of a thin and strong string, due to the relatively high strain on the shoulders.

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The best interpretation from the graph can be train speed up for 3 minutes, travelled at a steady speed for 2 minutes then speed up again.

Speed is defined as change in position of the body with respect to time or distance travelled by body per unit time is known as speed. Speed is a scalar quantity it have only magnitude.

Given graph in the question position or distance vs time initially the train is moving speed up for three seconds after that for two minutes train is moving with steady state, speed is not changing during this time after that train again speed up till end.

By looking at graph best interpretation is initially train speed up for 3 minutes, travelled at a steady speed for 2 minutes then speed up again.

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The average force necessary to stop a hammer having momentum of 25 NS , in 0.05 second is 500N.

What is Momentum?

Momentum is the product of a particle's mass and velocity. Being a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force acting on the particle equals the time rate of change of momentum. The rate of change of a body's momentum is equal to the net force exerted on it, according to Newton's second law of motion. Regardless of the frame of reference, momentum is a conserved quantity in any inertial frame, which means that if an enclosed system is not subject to outside influences, its total linear momentum remains constant. Additionally, momentum is preserved in general relativity, electrodynamics, quantum mechanics, quantum field theory, and special relativity (using a modified formula). It is a manifestation of translational symmetry, one of the basic symmetries of space and time.

Force is given by Time/Impulse

​= 0.05/25

​ =500N

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Minimum speed is necessary to clear the canyon is 14 m/s

What is speed ?

The speed of an object, also known as v in kinematics, is the size of the change in that object's position over time or the size of the change in that object's position per unit of time, making it a scalar quantity. The instantaneous speed is the upper limit of the average speed as the duration of the time interval gets closer to zero. [1] The average speed of an object in a period of time is the distance travelled by the object divided by the duration of the interval. Velocity and speed are not the same thing.

The parameters of speed are time divided by distance. The most often used unit of speed in daily life is the kilometre per hour (km/h), or miles per hour in the US and the UK. The SI's unit of speed is the metre per second (m/s) (mph). The knot is frequently utilised for maritime and air transport.

Horizontal range for a launch angle θ on a level surface is given by:

d=v2g

∴v2=gsin(2θ)

∴v2=9.8×10

v2=196

v=14m/s

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