2. The following is a sign of good sportsmanship:

Yelling at the official when a bad call is made.

He should know better.

Leaving the game early.

Ignoring the rules of the game.

Shaking hands with the opponent at the end of the game.

Answer:

Work is directly proportional to energy.

Explanation:

Work is said to be done when a body is displaced from one position to another. A force is required to make this displacement. This force applied is a kind of energy that is kinetic in nature. So when we displace an object by applying force, we are changing its kinetic energy to do the work.

Work Done = Change in Kinetic Energy.

Answer:

2836.36 kg/m³

Explanation:

Applying,

Densty of granite(D')/Density of water(D) = weight of granite(W')/weight of water displaced(W)

D'/D = W'/W................... Equation 1

Make D' the subject of the equation

D' = W'D/W............... Equation 2.

From the question,

Given: W' = mg = 9.8(15.6/1000) = 0.15288 N, W = 9.8(5.5/1000) = 0.0539 N, Constant: D = 1000 kg/m³

Substitute these values into equation 2

D' = 1000(0.15288)/0.0539

D' = 2836.36 kg/m³

Answer:Water pollution is a concern because since it is cycled threw the earths system it effect the earths system in a negative way.

Explanation:

I would wait for someone else to answer just in case I’m wrong.

Answer:

1. wisest

2. more delicious

3. majestic (not sure about this one)

4. industrious

5. happiest

Stopping distance of the car, as measured from the point where the driver first sees the red light, is 43.95 meters We can use distance-time formula.

To calculate the stopping distance of the car, we need to determine the distance traveled during the driver's reaction time and the distance traveled while the car is decelerating.

During the driver's reaction time, the car will continue to move forward at its initial speed of 15.5 m/s. The distance traveled during this time is:

\(d_reaction = v_initial * t_reaction = 15.5 m/s * 0.321 s = 4.98 m\)

After the driver reacts, the car begins to decelerate at a rate of \(6.2 m/s^2\). Use equation:

d =\(v_initial * t + (1/2) * a * t^2\)

where d: distance traveled, v_initial: initial velocity, t: time, a: acceleration, and final velocity = 0 (since car stops).

We need to find the distance traveled during the deceleration period, so we can rearrange the equation to solve for d:

d = \((v_initial^2) / (2a)\)

Put values:

\(d_deceleration = (15.5 m/s)^2 / (2 * -6.2 m/s^2) = 38.97 m\)

Note that we used a negative value for acceleration, since the car is decelerating (slowing down) rather than accelerating (speeding up).

The total stopping distance is the sum of the distance traveled during the driver's reaction time and the distance traveled while decelerating:

\(d_total = d_reaction + d_deceleration = 4.98 m + 38.97 m = 43.95 m\)

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If it's a monatomic gas system the difference in temperature is about 0.212 K.

Helium, neon, argon, krypton, radon, xenon, and neon are a few examples of monatomic gases (the noble gases).

The following equation can be used to determine the temperature change for a monatomic gas:

U is calculated using the formula U = (3/2) * n * R * T, where n is the number of moles, R is the gas constant, and T is the temperature.

To solve for T, rewrite the problem as follows:

T = (2/3) * U / (n * R)

We may now change the values provided:

T = (0.700 mol * 8.31 J/mol K) * (2/3) * 0.800 J

T = 0.212 K

Thus, the difference in temperature is almost 0.212 K.

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Answer:

yes

Explanation:

After the Earth, Mars is the most habitable planet in our solar system due to several reasons: Its soil contains water to extract. It isn't too cold or too hot. ... Gravity on Mars is 38% that of our Earth's, which is believed by many to be sufficient for the human body to adapt to.

The maximum tension the string can withstand is approximately 50.265 Newtons.

To find the maximum tension the string can withstand, we can use the centripetal force equation:

F = \((m * v^2) / r\)

where F is the tension in the string, m is the mass, v is the linear velocity, and r is the radius of the circular path.

First, we need to find the linear velocity (v) of the mass. The linear velocity is given by the formula:

v = (2πr) / T

where T is the period of revolution.

Given that the period of revolution is 0.25 seconds and the radius of the circular path is 40 cm (0.4 m), we can calculate the linear velocity:

v = (2π * 0.4 m) / 0.25 s

v ≈ 10.053 m/s

Now, we can substitute the values into the centripetal force equation:

F =\((m * v^2) / r\)

Given that the mass is 200 grams (0.2 kg) and the radius is 40 cm (0.4 m), we can calculate the maximum tension:

F = \((0.2 kg * (10.053 m/s)^2) / 0.4 m\)

F ≈ 50.265 N

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The name of the gravitational force acting on a mass on the surface of the Earth is gravity larger masses have stronger  gravitational fields. If the field is stronger on a planet, objects will accelerate towards the ground at a faster  rate.​

Gravity is a force that attracts two objects with mass towards each other. It is the force that gives weight to physical objects and is what keeps us grounded on the surface of the Earth.

Therefore, The strength of the gravitational field depends on the mass of the object creating the field and the distance from the object. The larger the mass of the object, the stronger the gravitational field. The closer an object is to the source of the gravitational field, the stronger the field will be.

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The name of the gravitational force acting on a mass on the surface of the Earth is weight.

Larger masses have greater  gravitational fields.

If the field is stronger on a planet, objects will accelerate towards the ground at a constant rate.​

Gravitational force is described as the force of attraction between all masses in the universe more especially the attraction of the earth's mass for bodies near its surface.

This is better explained by Newton's law of universal gravitation states that every particle attracts every other particle in the universe with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

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Answer: V = M1 U/ (M1 + M2)

Explanation: According to the question as the second mass is in rest therefore, the velocity of the second mass would be 0.

The law of conservation of momentum states that in an isolated system the momentum of two bodies before and after collision remain the same unless and until an external force is made to act upon it.

In this case as well when the bodies collide the momentum before and after the collision is going to remain the same.

Therefor,

M1 x U + M2 x 0 = (M1 + M2) x V

=> V = M1 x U/ (M1 + M2)

Hence the correct expression which represent V is M1 x U/ (M1 + M2).

How are impulse and momentum related explained:

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Explanation:

Absorbing heat from the sun rather than reflecting.

Answer:

40

Explanation: 1 hour and 15 min is 1.25 hour.

50km   -->    1.25 h

x km     -->    1 h

50 km * 1h = x km*1.25h

x = 40 average speed of car is 40

Answer:

338.7cm

Explanation:

The can of corn would be in the shape of a cylinder. Since we are looking at capacity, we will want to find the volume.

V=abase×h

V=πr2×h

V=π(d2)2×h

V=π(6.62)2×9.9

V=338.7cm3

Hopefully this helps!

Answer:

338.7 cm³

Explanation:

For this question you use the volume formula of a cylinder πr²h.

Radius is 1/2 the diameter.

Simply input the variables into the formula.

π(3.3)²×9.9 = 107.811π or approximately 338.7 cm³

The length of the rubber band that the boy must use is 0.024 m or 24 mm.

To determine the length of the rubber band, we can use the formula for the potential energy stored in a stretched spring, which is also applicable to a stretched rubber band:

where U is the potential energy stored in the rubber band, k is the spring constant (or in this case, the rubber band constant), and x is the displacement of the rubber band from its natural length.

Since the rubber band is stretched by 0.25 of its natural length, the displacement x is 0.25 times the natural length of the rubber band.

We can solve for the rubber band constant k by using the formula for the velocity of a projectile launched by a spring (or in this case, a rubber band):

where v is the velocity of the projectile, m is the mass of the rubber band, M is the mass of the projectile, and k is the spring constant. We can rearrange this equation to solve for k:

k = (v² M) / (2 m)

We can now combine the two equations to solve for the length of the rubber band, L:

U = 1/2 k x²

U = 1/2 ((v² M) / (2 m)) (0.25 L)²

U = (v² M L²) / (32 m)

The potential energy stored in the rubber band must be equal to the kinetic energy of the projectile when it is launched:

U = 1/2 M v²

(v² M L²) / (32 m) = 1/2 M v²

L = ((16 m v²) / (k M))

L = ((16 m v²) / ((v² M) / (2 m) M))

L = √(32 m^2 / M)

L = (0.032 M)

Substituting the given values, we get:

L = √(0.032 * 0.006)

L = 0.024 m

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Answer:

This statement is not true

Explanation:

Because The normal magnetic field line points out from the north magnetic pole and in from the south magnetic pole.

Answer:

false

Explanation:

hope this helps :)

Answer:

So overall, motion and interference of matter are needed equally for friction, which is held together by the force of gravity. Without gravity, everything would have fly away in the universe, and the friction would not have exist. Hence, friction is dependent on gravity.

Elaborately means in a detailed and carefully arranged manner.

Explanation:

hope this helps!!!!

I will need to give a long answer and explain the science behind it. When you open your eyes underwater, the light passing through the water is refracted (bent) at a different angle than it is when passing through air. This causes the light to focus in front of your retina, resulting in blurry vision.

A face mask helps to enable clear vision because it creates an air pocket in front of your eyes, allowing the light to pass through the mask's lenses without being refracted by the water. The lenses of a face mask are also designed to correct for the refractive error caused by water, which further enhances the clarity of the image.

the blurry vision when opening your eyes underwater is caused by the refractive properties of water. A face mask creates an air pocket and has lenses designed to correct for this refraction, resulting in clear vision.

Your vision becomes blurry underwater because the refractive index of water is different from that of air. Our eyes have evolved to see clearly in air, but when light passes through water, it bends differently, causing the images to be out of focus. This effect is called refraction.

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Answer: 1 kg

Explanation: a = 10m/s^2

                      F = 10N

                      m = ?

F = ma

10 = 10m

m = 10/10

= 1 kg

Hope this helped...

Answer:

Initially the acceleration is acceleration due to gravity and after that it is zero.

Explanation:

Describe the changes in speed and acceleration during the stages of a parachute jump. Jump from plane

As the person jump with the parachute and till the parachute is not opened, then in this condition, the acceleration is acceleration due to gravity due to which he moves in the downwards direction.

As the parachute is opened, the drag force of air and the buoyant force due to the air acts on the parachute in the upwards direction. So, the net acceleration is zero ad the force due to the gravity is balanced by the drag force and the buoyant force and thus the acceleration if zero and the person is safe.  

The term for waves that are caused by seismic activity is seismic waves.

Seismic waves are waves of energy that travel through the Earth's layers in response to seismic activity. Seismic activity refers to any activity that causes the ground to vibrate, such as earthquakes, volcanic eruptions, and human-made explosions.

Seismic waves are waves of energy that travel through the Earth's layers, including the crust, mantle, and core. Seismic waves are classified into two main types: body waves and surface waves.

Seismic waves can be detected and measured using specialized equipment such as seismometers. Seismometers are instruments that measure the motion of the ground and can detect even small vibrations caused by seismic waves.

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The acceleration of an object is the change in velocity divided by the change in time of motion.

Here is a step-by-step procedure for calculating acceleration:

Step 1: Determine the initial velocity of the object in question. This is typically represented as 'u'. The units for initial velocity are meters per second (m/s).

Step 2: Determine the final velocity of the object in question. This is typically represented as 'v'. The units for final velocity are meters per second (m/s).

Step 3: Determine the time it takes for the object to change its velocity from the initial velocity to the final velocity. This is typically represented as 't'. The units for time are seconds (s).

Step 4: Use the following formula to calculate acceleration:

Acceleration = (Final Velocity - Initial Velocity) / Time

The units for acceleration are meters per second squared (m/s^2).

Step 5: Substitute the values you found for initial velocity, final velocity, and time into the formula from Step 4.

Step 6: Calculate the answer to find the acceleration of the object. Make sure to use the correct units.

Here is an example problem that demonstrates this procedure:

Example: A car accelerates from 10 m/s to 30 m/s in 5 seconds. What is the acceleration of the car?

Step 1: Initial velocity = 10 m/s

Step 2: Final velocity = 30 m/s

Step 3: Time = 5 seconds

Step 4: Acceleration = (30 m/s - 10 m/s) / 5 s = 4 m/s^2

Step 5: Substitute values into the formula: Acceleration = (30 - 10) / 5 = 4 m/s^2

Step 6: The acceleration of the car is 4 m/s^2.

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Answer:

There must be added 500 cm3 of alcohol to bring the concentration to 80%.

Explanation:

Concentration

The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solution.

In the container, there are 2 liters (2000 cubic centimeters) of a solution, 75% of which is alcohol (solute) and 25% of water (solvent).

The original amount of alcohol is:

H = 2000*75% = 1500 cc

The original amount of water is:

W = 2000*25% = 500 cc

When we add x cc of pure alcohol, there are 1500+x cc of alcohol out of 2000+x cc of solution.

The new concentration is calculated as:

\(\displaystyle \frac{1500+x}{2000+x}\)

And it's known this concentration is 80% (0.8), thus:

\(\displaystyle \frac{1500+x}{2000+x}=0.8\)

Multiplying by 2000+x:

\(1500+x = 0.8(2000+x)\)

Operating:

\(1500+x = 1600+0.8x\)

Rearranging:

\(x-0.8x=1600-1500\)

\(0.2x=100\)

\(x=100/0.2\)

x= 500

There must be added 500 cm3 of alcohol to bring the concentration to 80%

The displacement of train moves is s = 147.68m.

To calculate the displacement train moves using the formula of equation of motion,

s = 1/2 ( u + v ) t

Where,

s is displacement

u is initial velocity

v is final velocity

t is time

Given data :

u = 4.82 m/s

v = 7.09 m/s

t = 24.8 s

s = ?

Now, putting the values in equation we get,

s = 1/2 (  4.82 m/s + 7.09 m/s ) 24.8 s

s  = 1/2 x 11.91 m/s x 24.8 s

s = 147.68 m

Hence, the displacement of train moves is s = 147.68m.

The fundamental equation of motion in classical mechanics is Newton's second law, which declares that the force F acting on a body is equal to that body's mass m times its center of mass's acceleration a, or F = ma.

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Answer:

315 meters

Explanation:

You just multiply 45 by 7

Answer:

Density= 2.78 g/cm³

Relative density=2.8

Explanation:

To calculate the density of the cube we have to use the formula ρ=mass/volume

ρ stands for density.

So now we don't have the volume of the cube and to find the volume of the cube we have to use the formula a³

3³= 9 cm³

Now plug in the values. ρ= 25 g/9 cm³

ρ= 2.78 g/cm³

To find the relative density, we have to use the formula ρsample/ρH20

The sample means the density of the substance earlier. We do not know the density of water but it is constant at 997 kg/m³.

Now we have to make the units same so you change the unit of the density of cube to kg/m³

So, 25/1000= 0.025 kg

9/100×100×100 (because cm³ which means that there should be 3 meters to change the unit and to conver cm to meter we need to divide by 100 so 9cm/100, 9cm²/100×100, 9cm³/100×100×100)

=0.000009 m³

The new density= 0.025 kg/ 0.000009 m³

= 2777.78 kg/m³

Now plug the values into the formula:

relative density= 2.777.78 kg/m³ / 997 kg/m³

=2.8

There is no unit since kg/m³ and kg/m³ cancels

Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

The terminal speed of a raindrop is proportional to the square of the radius.

If the radius is doubled, the terminal speed will quadruple.

The terminal speed of a raindrop is the speed at which the drag force from air resistance balances the force of gravity. The drag force is given by F = pACv^2/2, where p is the density of air, A is the cross-sectional area, C is the drag coefficient, and v is the speed.

The cross-sectional area of a spherical raindrop is A = πr^2, where r is the radius of the raindrop.

The force of gravity is given by F = mg, where m is the mass of the raindrop and g is the acceleration due to gravity.

For a raindrop to reach its terminal speed, the drag force must equal the force of gravity. This means that pACv^2/2 = mg.

Solving for v, we get v = (2mg)/(pCπr^2).

The terminal speed is proportional to the square of the radius. This means that if the radius is doubled, the terminal speed will quadruple.

v = (2mg)/(pCπr^2)

If r = 2r, then v = (2mg)/(pCπ(2r)^2) = 4 * (2mg)/(pCπr^2) = 4v

Therefore, the terminal speed will quadruple.

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The magnitude and direction of electric field that exerts 1.35 x 10^-5 N upward force on charge depends on charge's sign and magnitude, and can be determined using Coulomb's law.

The magnitude and direction of an electric field that exerts a 1.35 x 10^-5 N upward force on a charge depends on the charge's magnitude and sign.  We can use Coulomb's law to determine the electric field strength.  If the charge experiencing the force is positive, then the direction of the electric field must be upward as it attracts opposite charges. The magnitude of the electric field can be found by dividing the force by the charge's magnitude.
If we assume the charge is a proton (q=1.6 x 10^-19 C), then the electric field strength would be 8.4375 x 10^3 N/C. However, if the charge were negative, then the direction of the electric field would be downward as it repels like charges.
Electrostatic forces between points A and B, both of which are charged, are proportional to the charges of points A and B. Like charges do not attract but opposite charges do. There is another aspect of this law that I don't exactly recall.

Here is the equation:

F = kxQ1xQ2xQ2/d2

What the equation means is: F is the force between charges.

Q1 and Q2 equal the charge amount between these two charges, where d

k = the proportionately constant Coulomb's constant.

The magnitude and direction of an electric field that exerts a 1.35 x 10^-5 N upward force on a charge depends on the charge's sign and magnitude, and can be determined using Coulomb's law.

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Explanation:

Gravitational force

The force of gravity is the force with which the earth, moon, or other massively large object attracts another object towards itself.

Normal force

The normal force is the support force exerted upon an object that is in contact with another stable object.

Friction force

The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it.

Tension force

The tension force is the force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends.

Spring force

The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it.

Answer:

The right answer is c because when we heat solid object the molecule will start lose attraction on object

Explanation:

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