In a video game, a ball moving at 0.6 meter/second collides with a wall. After the collision, the velocity of the ball changed to -0.4 meter/second. The collision takes 0.2 seconds to occur. What’s the acceleration of the ball during the collision? Use .

Answer:

Italian

Explanation:

The Western Roman Catholic's main language​ was Italian.

Answer:

Approximately 73 grams if no heat is lost in this process.

Explanation:

Relevant data and their sources:

The heat it takes to raise the calorimeter and its content from 0°C to 40°C includes three parts:

Note that to avoid rounding errors, most calculations in this explanation do not follow significant figure rules.  

The latent heat of fusion of water gives the amount of heat required to melt each unit mass of ice at 0°C to water without changing the temperature. (As a side note, that's also the amount heat released when unit mass of water turns into ice at 0°C.)[tex]L_\mathrm{F}(\text{Water}) = \rm 334\;J\cdot g^{-1}[/tex]. Melting each gram of ice requires approximately 334 joules of heat, so melting 10 grams of ice will require about 3,340 joules of heat.

There's no state change involved after all that 10 grams of ice melted into water. There's now 80 grams of water at 0°C to melt. The specific heat of water gives the amount of energy required to raise one gram of water by one degree Celsius (which is the same as one degree Kelvin.) [tex]c(\text{Water}) = \rm 4.179\;J\cdot g^{-1}[/tex].

[tex]Q(\text{water}) = c(\text{water})\cdot m(\text{water}) \cdot \Delta T = \rm 4.179\times 80\times 40 = 13372.8\; J[/tex].

The melting point of copper is approximately 1,100°C, which is much higher than 100 °C. As a result, there will not be any state change in this process. [tex]c(\text{Copper}) = \rm 0.385\;J\cdot g^{-1}[/tex]. Similarly,

[tex]Q(\text{copper}) = c(\text{copper})\cdot m(\text{copper}) \cdot \Delta T = \rm 0.385\times 120\times 40 = 1848\; J[/tex].

Combining all three parts:

[tex]\rm 3340 + 13372.8 + 1848 = 18560.8\; J[/tex].

The steam added to the calorimeter will first condense to form water of 100°C before cooling down to 40°C. The energy released in that process will come in two parts:

To simplify the calculations, let the mass of steam required be [tex]x[/tex] grams. [tex]x>0[/tex].

Similar to the latent heat of fusion of water, the latent heat of vaporization of water gives the amount of heat released for each unit mass of steam that condenses to water at 100°C without change in temperature. (As a side note, that's also the amount of energy required to turn unit mass of water into steam at 100°C.) [tex]L_\mathrm{V}(\text{Water}) = \rm 2.260\;J\cdot g^{-1}[/tex]. In other words, each gram of steam that condenses at 100°C will release approximately 2.260 joule. [tex]x[/tex] grams of steam that condenses at 100°C will release [tex]2.260x[/tex] joules of heat.

Similar to the heat required to heat 80 grams of water from 0°C to 40°C, the heat released when [tex]x[/tex] grams of steam condenses to water can also be found with the specific heat capacity of water. [tex]c(\text{Water}) = \rm 4.179\;J\cdot g^{-1}[/tex].

[tex]Q(\text{water}) = c(\text{water})\cdot m(\text{water}) \cdot \Delta T = \rm 4.178\cdot \mathnormal{x}\times (100 - 40)=250.68\mathnormal{x} \; J[/tex].

[tex]2.260x + 250.68x = \rm 252.94\mathnormal{x}\;J[/tex].

The amount of heat released shall equal to amount of heat absorbed. As a result,

[tex]252.94x = 18560.8[/tex].

[tex]\displaystyle x = \rm\frac{18560.8}{252.94}\approx 73\;g[/tex].

In other words, approximately 73 grams of steam at 100°C will be required to heat that calorimeter and its contents to 40°C.

Answer:

7.4 g

Explanation:

Heat absorbed by copper:

= mc Cc ΔTc

= (120 g) (0.39 J/g/°C) (40°C − 0°C)

= 1872 J

Heat absorbed by ice:

= mi Li + mi Cw ΔTi

= (10 g) (334 J/g) + (10 g) (4.18 J/g/°C) (40°C − 0°C)

= 5012 J

Heat absorbed by water:

= mw Cw ΔTw

= (70) (4.18 J/g/°C) (40°C − 0°C)

= 11704 J

Heat lost by steam:

= ms Ls + ms Cw ΔTs

= m (2264.7 J/g) + m (4.18 J/g/°C) (100°C − 40°C)

= 2515.5 J/g m

1872 J + 5012 J + 11704 J = 2515.5 J/g m

m = 7.39 g

Rounded to two significant figures, the mass of steam needed is 7.4 grams.

Answer:

488 = r

Explanation:

362 = -126 + r; 488 = r

I am joyous to assist you anytime.

Answer: 7.6

Explanation:

Answer:

It is virtual and behind the mirror

Explanation:

When an image is produced by a mirror, we have the following situations:

- The image is said to be in front of the mirror if it is on the same side of the object, with respect to the mirror

- The image is said to be behind of the mirror if it is on the opposite side of the object, with respect to the mirror

Moreover:

- The image is said to be real if it is in front of the mirror

- The image is said to be virtual if it is behind the mirror

In this case, the image (located at point I) is on the opposite side of the object (located at point O), so it is virtual and behind the mirror.

Answer:

virtual and behind the mirror...hope this helps :))))

Answer:

245 m

Explanation:

v = at + v₀

50.0 m/s = a (9.8 s) + 0 m/s

a = 5.10 m/s²

x = x₀ + v₀ t + ½ at²

x = 0 m + (0 m/s) (9.8 s) + ½ (5.10 m/s²) (9.8 s)²

x = 245 m

Final answer:

The mechanic travels a distance of 245.5 meters by test driving a car that accelerates from rest to 50.0 m/s in 9.8 seconds using the kinematic equation for uniformly accelerated motion.

Explanation:

To solve the problem of determining the distance traveled by a mechanic test driving a car that accelerates from rest to 50.0 m/s in 9.8 seconds, we can apply the kinematic equation for uniformly accelerated motion:

[tex]s = ut + (1/2)at^2[/tex]

Here, s represents the distance traveled, u stands for the initial velocity, a is the constant acceleration, and t is the time taken. Since the car starts from rest, u is 0. We are given a final velocity of 50.0 m/s, which we can use to calculate the acceleration. Using a = Δv/Δt, where Δv is the change in velocity and Δt is the change in time, we get:

a = (50.0 m/s - 0 m/s) / 9.8 s

= 5.10 m/s

Substituting the known values into the kinematic equation, we get:

[tex]s = 0 * 9.8 s + (1/2) * 5.10 m/s^2 * (9.8 s)^2[/tex]

[tex]s = (1/2) * 5.10 m/s^2 * 96.04 s^2[/tex]

s = 245.5 m

The mechanic travels a distance of 245.5 meters.

Explanation:

Power = work / time, and work = force × distance

P = Fd / t

P = (10 N) (0.10 m) / (1 s)

P = 1 W

The average power is 1 Watt.

Answer:

true

Explanation:

Answer: False

Explanation:

When elements combine to form a product, they lose their individual unique property to form new properties identical to the compound formed. This lose in property could be natural state of matter, malleability, magnetic property, texture etc. Eg Hydrogen (H) combines with Oxygen to form variety of compounds conforming to various oxides. When two molecules of H combined with one molecule of oxygen, water which it's natural state is liquid is form hence losing the natural gaseous state of oxygen or hydrogen.

Another example is sodium and chlorine to form sodium chloride (table salt). Sodium is a group one metal and chlorine a gaseous element in group 17 which is greenish yellow in colour combines to form sodium chloride which its white in colour. Hence lose in color property has occurred in the new compound.

The arrow should be drawn upwards but the magnitude of force (arrow representing air resistance) should be shorter than the arrow representing gravity

1) 29.7 m/s

We can solve the first part of the problem by using the law of conservation of energy. In fact, the initial kinetic energy when the ball is thrown from the ground will be entirely converted into gravitational potential energy as the ball reaches its maximum heigth, so we can write:

[tex]\frac{1}{2}mv^2 = mgh[/tex]

where

m is the mass of the ball

v is the initial speed

g is the acceleration of gravity

h is the maximum height

Re-arranging the equation:

[tex]v=\sqrt{2gh}[/tex]

and substituting:

g = 9.8 m/s^2

h = 45 m

We find

[tex]v=\sqrt{2(9.8)(45)}=29.7 m/s[/tex]

2) 6.0 s

First of all, we can calculate how long the ball takes to reach the maximum height. This can be done by using the equation:

[tex]v=u+at[/tex]

where

v = 0 is the final speed of the ball, when it is at its maximum height

u = 29.7 m/s is the initial speed

a = -g = -9.8 m/s^2 is the acceleration of gravity (negative because it is downward)

t is the time

Solving for t,

[tex]t= \frac{v-u}{a}=\frac{0-29.7}{-9.8}=3.0 s[/tex]

So the ball takes 3.0 s to reach the maximum heigth. The time it takes to fall down again is equal, so also 3.0 s, so the total time of the motion is

t = 3.0 + 3.0 = 6.0 s

Answer:

Explanation:

The resistivity of a metal is given as

rho = k * l/Area

k is a constant associated with the metal

l is the length of the metal

A is the cross sectional area.

If you decrease the area and increase the length, you will increase the resistance. Always try and do physics problems by a formula of some kind.

Answer:

D. 18.60

Explanation:

By the law of conservation, the momentum is neither loss nor gained but instead transfered. When they crash into each other, and stick, they combine to create a total mass of 215 kg. Since the momentum is transfered, the two objects, combined, have a total momentum of 4000 kg-m/s. We know that momentum equals mass times velocity. You then divide 4000 by 215 and get approximately 18.6 m/s

Explanation:

Mechanical is the ratio of the output and input forces.

For example, if a lever is balanced in the middle, then pushing on one end will yield the same amount of force on the other end.  So the mechanical advantage is 1.

If instead that lever is balanced so that one side is twice as long as the other, then pushing on the long end will yield twice the force on the short end.  The mechanical advantage would be 2.

the advantage gained by the use of a mechanism in transmitting force

specifically : the ratio of the force that performs the useful work of a machine to the force that is applied to the machine

Answer:

loudness

Explanation:

Frequency is determined by speed / wavelength. The longer the wavelength, the lower the pitch. The 'height' of the wave is its amplitude. The amplitude determines how loud a sound will be

The wave frequency determines the pitch of the sound.

Answer: Option D

Explanation:

The wave frequency determines the pitch of the sound as the sound wave has the frequency which is sensibly understood by the human ear as the pitch. Pitch has two category, high pitch and low pitch.

A high pitch sound is one which has the rapid or more frequent oscillation and on the other hand, low pitch sound is the one which has slow or less frequent oscillation in the sound wave.

Answer:

0.191 s

Explanation:

The distance from the center of the cube to the upper corner is r = d/√2.

When the cube is rotated an angle θ, the spring is stretched a distance of r sin θ.  The new vertical distance from the center to the corner is r cos θ.

Sum of the torques:

∑τ = Iα

Fr cos θ = Iα

(k r sin θ) r cos θ = Iα

kr² sin θ cos θ = Iα

k (d²/2) sin θ cos θ = Iα

For a cube rotating about its center, I = ⅙ md².

k (d²/2) sin θ cos θ = ⅙ md² α

3k sin θ cos θ = mα

3/2 k sin(2θ) = mα

For small values of θ, sin θ ≈ θ.

3/2 k (2θ) = mα

α = (3k/m) θ

d²θ/dt² = (3k/m) θ

For this differential equation, the coefficient is the square of the angular frequency, ω².

ω² = 3k/m

ω = √(3k/m)

The period is:

T = 2π / ω

T = 2π √(m/(3k))

Given m = 2.50 kg and k = 900 N/m:

T = 2π √(2.50 kg / (3 × 900 N/m))

T = 0.191 s

The period is 0.191 seconds.

The period of the resulting SHM is : 0.191 sec

Given data :

Edge length of cube = 6.50 cm

Spring ( K )  = 900 N/m  

Radius ( r ) = [tex]\frac{d}{\sqrt{2} }[/tex]  

mass ( m ) = 2.50 kg

Determine the period of the resulting SHM

Distance stretched by the spring when the cube is stretched through θ =  r sin θ

Vertical distance from the center = r cos θ

F = k r sin θ

next step : determine the sum of torques

sum of torques ( ∑τ ) = I∝

                          F * r cos θ = I∝

                          ( k r sin θ ) r cos θ =  I∝  

                          k (d²/2) sin θ cos θ = I∝  ------ ( 1 )

Note : For cube rotating around its center I = 1/6 md²

Back to equation ( 1 )

k (d²/2) sin θ cos θ = 1/6 md² * ∝

[tex]\frac{3}{2}[/tex] k sin(2θ) = m∝     ( sin θ ≈ θ for small values like 2° )

∴ ∝ = ( 3k / m ) θ

d²θ/dt² = ( 3k / m ) θ

∴ Angular frequency ( w ) = √ (3k/m)

Final step : Calculate the value of the period of the resulting SHM

T = 2π / ω

  = 2π / √( m / (3k) )

  = 2π / √(2.50 kg / (3 * 900 N/m))

  = 0.191 sec

Learn more about oscillating Period : https://brainly.com/question/20070798

Answer:

There is no net force acting on the train.

Explanation:

The net force equals mass times acceleration:

∑F = ma

The train moves at constant velocity, so its acceleration is 0.  Therefore, the net force is 0.

Answer:

the ability to disolve in water is solubility

The ability of one substance to dissolve in another one is its solubility.

Its ability to dissolve in water is its "solubility in water".

Its ability to dissolve in chicken soup is its "solubility in chicken soup".

Its ability to dissolve in vodka is its "solubility in vodka".

They may all be different.

To find the time(t) when the initial velocity(u) and the final velocity(v) are given, and the acceleration(a) is not constant, use the equation v = u + at. Substitute the known values into the equation and solve for t by isolating it on one side of the equation. Calculate the value of t using the given values and any necessary operations.

To find the time(t) when the initial velocity(u) and the final velocity(v) are given, and the acceleration(a) is not constant, you can use the equation:

v = u + at

For example, if u = 5 m/s, v = 10 m/s, and a = 2 m/s², you can substitute these values into the equation and solve for t.

10 = 5 + 2t

Subtract 5 from both sides: 10 - 5 = 5 = 2t

Divide both sides by 2: 5/2 = 2.5 = t

Therefore, the time(t) is 2.5 seconds.

Answer:

d) 25 m/s

Explanation:

Acceleration is change in velocity over change in time:

a = Δv / Δt

8 m/s² = (v − 1 m/s) / 3s

v = 25 m/s

Answer: Physics is the study of Nature.

Explanation: The knowledge of Nature is the natural science that studies matter, its motion and behavior through space and time, and that studies the related entities of energy and force. Hope this helps. :D

Resultant is a term describing the sum of two or more vectors.

Choice A

When adding or subtracting vectors, the final outcome is known as the resultant vector. Understanding how to add vectors helps find the resultant vector by combining magnitudes and directions. Vector multiplication can lead to a triple scalar product, resulting in a scalar value.

The final quantity you get when adding or subtracting vectors is called the resultant vector. In other words, the individual vectors can be replaced by the resultant - the overall effect is the same.

When dealing with adding two or more vectors, the process involves adding the vectors head-to-tail to determine the resultant vector. The resultant vector combines the magnitudes and directions of the original vectors.

The product A (B X C) in vector multiplication refers to the triple scalar product, which results in a scalar quantity obtained by multiplying three vectors.

Explanation:

This problem is a good example of an inelastic collision, in which the elements that collide remain together after the collision, and althogh the kinetic energy is not conserved, the linear momentum [tex]p[/tex] does.

Thus: [tex]p=m.V[/tex]  (1)

Where [tex]m[/tex] is the mass and [tex]V[/tex] the velocity.

[tex]p_{i}=p_{f}[/tex]  (2)

Where [tex]p_{i}[/tex] is the initial momentum and [tex]p_{f}[/tex] the final momentum.

[tex]p_{i}=m_{i1}V_{i1}+m_{i2}V_{i2}[/tex] (3)

Where [tex]m_{i}=8kg[/tex] is the initial mass (mass of the big fish) and [tex]V_{i}=3m/s[/tex] is the initial velocity of the big fish, [tex]m_{i2}=2kg[/tex] is the initial mass of the small fish and [tex]V_{i2}=1m/s[/tex] is the initial velocity of the small fish.

[tex]p_{i}=(8kg)(3m/s)+(2kg)(1m/s)=26kg.m/s[/tex] (4)

By the conservation of linear momentum:

[tex]p_{i}=p_{f}=26kg.m/s[/tex] (5)

In this case we will focus on [tex]p_{f}[/tex] (after the "collision"):

[tex]p_{f}=(m_{i1}+m_{i2})V[/tex] (6)

Where [tex]V[/tex] is the velocity of the system of both fish.

Finding [tex]V[/tex]:

[tex]V=\frac{p_{f}}{m_{i1}+m_{i2}}[/tex] (7)

Solving (7) and remembering [tex]p_{i}=p_{f}[/tex]:

[tex]V=\frac{26kg.m/s}{8kg+2kg}[/tex] (8)

Finally:

[tex]V=2.6m/s[/tex]

Answer:

D.

Explanation:

P

The symbol for lead is Pb: it comes from the latin name for it, which is plumbum.

Final Answer:

The correct symbol for the element lead is Pb.

Explanation:

This question demands basic understanding of periodic table and its elements along with symbols of all the elements in a proper sequence of their appearance.

The correct symbol for the element lead, according to the periodic table, is Pb. The element lead has an atomic number of 82, which means it has 82 protons. Mass of lead is 207.2. The symbol Pb represents the element lead in chemical equations and on the periodic table.

Some important properties of lead are that it is denser than many elements of periodic table and at the same time it is malleable and soft enough.

Explanation:

The variation in distance [tex]\Delta d[/tex] is given by:

[tex]\Delta d=d_{f}-d_{o}[/tex]  (1)

Where [tex]d_{f}=9.3m[/tex] is the final distance of the cat from the door and [tex]d_{o}=5.4m[/tex] is the initial distance of the cat from the door.

Solving (1) with the known values:

[tex]\Delta d=9.3m-5.4m=3.9m[/tex]  (2)

Hence:

[tex]\Delta d=3.9m[/tex]  

Answer:

7400 m/s

Explanation:

Centripetal acceleration = gravity

v² / r = GM / r²

v = √(GM / r)

Given:

G = 6.67×10⁻¹¹ m³/kg/s²

M = 5.98×10²⁴ kg

r = 9.8×10⁵ + 6.357×10⁶ = 7.337×10⁶ m

v = √(6.67×10⁻¹¹ (5.98×10²⁴) / (7.337×10⁶))

v = 7400

The orbital velocity is 7400 m/s.

This question involves the concepts of centripetal force and gravitational force of attraction.

The velocity of the satellite is "7373.17 m/s".

For the satellite to continue its motion in a circular path its centripetal force must be equal to the gravitational force:

[tex]F_c=F_G\\\\\frac{mv^2}{r}=\frac{GmM}{r^2}\\\\v^2=\frac{GM}{r}\\\\v=\sqrt{\frac{GM}{r}}[/tex]

where,

v = speed of satellite = ?

G = universal gravitational constant = 6.67 x 10⁻¹¹ N.m²/kg²

M = Mass of Earth = 5.98 x 10²⁴ kg

r = distance of satellite + radius of earth = 9.8 x 10⁵ m + 6.357 x 10⁶ m

r = 7.337 x 10⁶ m

Therefore,

[tex]v=\sqrt{\frac{(6.67\ x\ 10^{-11}\ N.m^2/kg^2)(5.98\ x\ 10^{24}\ kg)}{7.337\ x\ 10^6\ m}}[/tex]

v = 7373.17 m/s

Learn more about centripetal force here:

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The attached picture shows the centripetal force.

Answer:

0.8 m/s²

Explanation:

Convert km/h to m/s:

20 km/h × (1000 m / km) × (1 h / 3600 s) = 5.56 m/s

50 km/h × (1000 m / km) × (1 h / 3600 s) = 13.89 m/s

Acceleration is change in velocity over change in time:

a = Δv / Δt

a = (13.89 m/s − 5.56 m/s) / 10 s

a = 0.83 m/s²

Rounded to one significant figure, the car accelerates at 0.8 m/s².

We can find the y-component of the resultant force by adding the y-components of the two 20N forces.

For a force of magnitude F and lying at an angle off the x-axis θ, the y-component of the force is given by:

Fsin(θ)

The magnitude of the two forces is 20N, and they lie at 30° and 60°, so the sum of their y-components, and therefore the y-component of the resultant force, is:

20sin(30°)+20sin(60°)

= 27.3N

Answer:

200 cm cube

Explanation:

The formula for volume is length * breadth * height so we get 200 cm cube as answer.

Answer:

The answer is d. 200 cm3.

Explanation:

The volume of the block is equals to the length multiply width and multiply height. So the volume of the wood is 4*5*10=200 cm3.

Answer: adiabatic

Explanation:

Answer:

D) Melting ice

Its absorbtion of heat is the reason it's melting

Answer: D

Explanation:

The answer is D. Melting Ice