You have to balls heading towards you. One of them is football (lighter with higher velocity) and the other one is a bowling ball (heavier with lower velocity). They have the same momentum. There are no other variables included. Which one would be easier to catch. Explain why.

Answer:

Titan is the largest moon in Saturrn

Explanation:

And only Jupiter's moon Ganymede is larger by 2 percent

Answer:

The resulting speed of the ball is;

10 m/s

Explanation:

The given parameters are;

The amount of work done by the lever = 5.0 J

The mass of the ball on which the work is done, m = 0.10 kg

By the principle of conservation of energy, we have;

The work done by the lever = The kinetic energy. K.E., gained by the ball

The kinetic energy, K.E., is given by K.E. = 1/2·m·v²

Where, for the ball, we have;

m = The mass of the ball

v = The resulting speed of the ball

Therefore, by substituting the known values, we have;

The work done by the lever = 5.0 J = The kinetic energy. K.E., gained by the ball =  1/2 × m × v² =  1/2 × 0.10 kg × v²

∴ 5.0 J = 1/2 × 0.10 kg × v²

v² = 5.0 J/(1/2 × 0.10 kg) = 100 m²/s²

v = √(100 m²/s²) = 10 m/s

The resulting speed of the ball, v = 10 m/s.

Answer:

E_loss  = 690000 [J]

Explanation:

The principle of conservation of Energy tells us that energy is converted from Kinetic to mechanical when the body moves from the highest point to the point where the velocity is maximum. That is, all potential energy is transformed into kinetic energy.

[tex]E_{pot}=E_{kin}[/tex]

Now we must determine the kinetic energy at the end, when the roller coaster is at the point where the reference point of power energy is zero.

[tex]E_{kin}=\frac{1}{2} *m*v^{2}[/tex]

where:

m = mass = 800 [kg]

v = 45 [m/s]

Now replacing:

[tex]E_{kin}=0.5*800*(45)^{2}\\E_{kin}=810000[J][/tex]

Now by means of the difference of the energy at the beginning minus the final energy, it determines the amount of energy that is lost by the effects of friction and heat.

[tex]E_{loss}=1500000-810000\\E_{loss}=690000[J][/tex]

Answer:

I put X and Y components so make sure you pay attention to which is correct for you.

Explanation:

X = -9.82

Y = 10.5

Yes, the electromagnet still affects the compass needle.

(plato answer)

yeah, it affects the needle

Answer:

0.2

Explanation:

The average velocity of Walt will be 0.2 km/min east.

We have a boy named Walt.

We have to find the average velocity of Walt.

It is defined as the rate of change of displacement with time. Mathematically -

v = Δx / Δt

According to the question -

Total distance = d = 5 Km

Time = t = 25 minutes

Average velocity = d / t = 5/25 = 0.2 km/min

Therefore, the average velocity of Walt will be 0.2 km/min east.

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Answer: Truck 2, because it has a larger mass than truck 1 (and the same velocity)

Explanation:

We can write the kinetic energy of an object with mass M and velocity V as:

K = (M/2)*V^2

Let's calculate the kinetic energy for each truck:

Now, we can see that both trucks move at the same velocity, but truck 1 has a mass of 5000 pounds, while truck 2 has also a mass of 5000 pounds and an extra of 900 pounds.

Then the total mass of truck 2 is 5000 pounds + 900 pounds = 5900 pounds.

Then both trucks have the same velocity, and truck 2 has a larger mass than truck 1, this implies that truck 2 will have a larger kinetic energy than truck 1.

Answer:

0.079m²

Explanation:

Pressure = Force/Area

Given

Force = 15000N\Pressure = 190kPa = 190,000Pa

Substitute into the formula

Area = Force/Pressure

Area = 15000/190000

Area = 0.079m²

Hence the space covered by the tire will be 0.079m²

Answer:

Electromagnetic waves which has higher frequency will have a higher degree of penetration power. Frequency has an indirect relationship with the wavelength. Therefore, Electromagnetic waves which has larger wavelength values will have more penetration power.

Explanation:

hope this helped

Answer:

The total momentum of the system is 1.45 kg*m/s.

Explanation:

The total momentum of the system is given by:

[tex] p_{T} = p_{d} + p_{b_{1}} + p_{b_{2}} + p_{b_{3}} [/tex]

[tex] p_{T} = m_{d}v_{d} + m_{b_{1}}v_{b_{1}} + m_{b_{2}}v_{b_{2}} + m_{b_{3}}v_{b_{3}} [/tex]

Where:

m: is the mass

v: is the velocity

d: is for duck

b₁: is for baby duck one

b₂: is for baby duck two

b₃: is for baby duck three

[tex] p_{T} = 0.5 kg*2 m/s + 0.1 kg*1.5 m/s +0.1 kg*1.5 m/s + 0.1 kg*1.5 m/s = 1.45 kg*m/s [/tex]        

Therefore, the total momentum of the system is 1.45 kg*m/s.

I hope it helps you!              

Answer:

   v = 72 km / h

Explanation:

The definition of average speed is the distance traveled between the time interval

          v = Δx / Δt

let's find the distance traveled

       x = 60 + 30

       x = 90 km

time spent, all time must be included, travel time and when stopped

       t = 0.45 + 0.15 + 0.5+ 0.15

       t = 1.25 h

we substitute in the initial equation

      v = 90 / 1.25

       v = 72 km / h

in going from one city to the other

Answer:

Answer:

umbra, penumbra

Explanation:

Answer:

1) The fan's angular velocity after 0.208 seconds is approximately 2.585 rad/s

2) The number of revolutions the blade has travelled in 0.208 s is approximately 0.066 revolutions

3) The tangential speed of a point on the tip of the blade at time t = 0.208 s is approximately 1.034 m/s

4) The magnitude of the tangential acceleration of a point on the tip of the blade at time t = 0.208 seconds is approximately 2.312 m/s²

Explanation:

The given parameters are;

The initial velocity of the fan, n = 0.220 rev/s

The magnitude of the angular acceleration = 0.920 rev/s²

The direction of the angular acceleration and the angular velocity = Clockwise

The diameter of the circle formed by the electric ceiling fan blades, D = 0.800 m

1) The initial angular velocity of the fan, ω₀ = 2·π × n = 2·π × 0.220 rev/s = 1.38230076758 rad/s

The angular acceleration of the fan, α = 2·π×0.920 rad/s² = 5.78053048261 rad/s²

The fan's angular velocity, 'ω', after a time t = 0.208 seconds has passed is given as follows;

ω = ω₀ + α·t

From which we have;

ω = 1.38230076758 rad/s + 5.78053048261 rad/s × 0.208 s = 2.58465110796 rad/s

The fan's angular velocity after 0.208 seconds is ω ≈ 2.585 rad/s

2) The number of revolutions the blade has travelled in the given time interval is given from the angle turned, 'θ', in the given time as follows;

θ = ω₀·t + 1/2·α·t²

θ = 1.38230076758 × 0.208 + 1/2 × 5.78053048261 × 0.208² = 0.41256299505 radians

2·π radians = 1 revolution

∴ 0.41256299505 radians = 0.41256299505 radian× 1 revolution/(2·π radian) = 0.06566144 revolution

The number of revolutions the blade has travelled in 0.208 s ≈ 0.066 revolutions

3) The tangential speed of a point on the tip of the blade at time t = 0.208 s is given as follows;

The tangential speed, [tex]v_t[/tex] = ω × r = ω × D/2

At t = 0.208 s, ω = 2.58465110796 rad/s, therefore, we have;

[tex]v_t[/tex] = ω × D/2 = 2.58465110796 × 0.800/2 = 1.0338604413

The tangential speed, [tex]v_t[/tex] = 1.0338604413 m/s

The tangential speed ≈ 1.034 m/s

4)  The magnitude of the tangential acceleration of a point on the tip of the blade at time t = 0.208 seconds, 'a' is given as follows;

a = α × r = α × D/2

a = 5.78053048261 × 0.800/2 = 2.31221219304

The tangential acceleration, a ≈ 2.312 m/s²

Answer:

22. is A and 23. is C

Explanation:

Answer:

Explanation:

im confused

Answer:. B

Explanation: how this helps sry if I'm wrong

Answer:

0.012  seconds

Explanation:

The time at which the soccer player maintain contact with the ball is as follows:

Given that

Change in momentum = 11 kg.m.s^-1

The Net force applied = F = 910 N

Now the following formulas should be applied:

For acceleration:

[tex]a = \frac{\triangle v}{\triangle t} \\\\\triangle v = a \triangle t[/tex]

For momentum

[tex]\triangle p = m\triangle v\\\\\triangle p = ma\triangle t\\\\\triangle p = f\triangle t\\\\\triangle t = \frac{\triangle p}{F}[/tex]

Now

Put  the values to the above formula

= 11 ÷ 910

= 0.012 seconds

Answer:

The work done is 100,000 Joule

Explanation:

Work and Power

Work is the amount of energy transferred by a force.

If both the force F and displacement s are parallel, then we can use the formula:

W = F.s

Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.

The power can be calculated as:

[tex]\displaystyle P=\frac {W}{t}[/tex]

Where W is the work and t is the time.

We know the power needed to move a spoon is P=10,000 Watt and it took a time of t=10 s. The work done on the spoon is calculated by solving for W:

W = Pt

W = 10,000 Watt * 10 sec

W = 100,000 Joule

The work done is 100,000 Joule

Answer:

V = 0.896 m/s

Explanation:

This is a typical problem of momentum conservation, whic states the following:

m₁V₁ + m₂V₂ = m₁V₃ + m₂V₄   (1)

In this case V₃ and V₄ would be the final velocity of the trucks after the collision.

With the given data let's see what we have:

m₁ = 5.5x10⁵ kg

m₂ = 2.3x10⁵ kg

V₁ = 5 m/s

V₂ = -5 m/s because it's going to the left (-x axis)

V₄ = 9.1 m/s to the right (Meaning is positive)

V₃ = ??

So to calculate V₃ we just need to replace the data into (1) and solve for V₃:

(5.5x10⁵ * 5) - (2.3x10⁵ * 5) = 5.5x10⁵V₃ + (2.3x10⁵ * 9.1)

2.75x10⁶ + 1.15x10⁶ = 5.5x10⁵V₃ + 2.093x10⁶

V₃ = 2.75x10⁶ - 1.15x10⁶ - 2.093x10⁶ / 5.5x10⁵

V₃ = -0.493x10⁶ / 5.5x10⁵

V₃ = -0.896 m/s

With this sign, it means that is going in the same sense of the other truck, but it's going to the left so this would be positive:

Hope this helps

Answer:

The correct answer - c. 12.

Explanation:

Given:

Total distance: 6 km

Total time - 45 minutes

covered distance - one half of 6 km = 3 km

time used - 2/3*45 = 30 minutes

Solution:

Remaining distance - 6-3 = 3 km

Remaining time = 45 - 30 = 15 minutes or 1/4 hour

Required speed = remaining distance/ remaining time

                            = [tex]\frac{3}{1/4}[/tex]

                            = [tex]\frac{3*4}{1}[/tex]

                            = 12 km/hr

Answer:

current?

Explanation:

Answer:

r = 50[m]

Explanation:

Since the instrument has an operating or range radius, we must calculate this working distance or radius. We can determine the working area with the values that were given to us.

[tex]A=\frac{70W}{0.0089\frac{w}{m^{2} } } \\\\A=7865.16[m^{2} ][/tex]

Now using the area of the circle we can find the radius.

[tex]A=\pi *r^{2} \\7865.16=\pi *r^{2} \\\\r=\sqrt{\frac{7865.16}{\pi } } \\r=50[m][/tex]

Answer:

Say you feel like you twisted ur ankle or can move your foot or something in that category

Answer:

The flow of energy from falling water to the steam is;

a) Mechanical → Mechanical → Electrical → Thermal → Thermal

Explanation:

1) Mechanical → Mechanical

The water in the pipe before it falls possesses potential energy which it converts into kinetic energy as it falls from height

2) Mechanical → Mechanical

The water falling from the pipe stream unto the turbine wheel transfers its kinetic (mechanical) energy due to its motion on to the turbine wheel to give the wheel rotational motion

3) Mechanical → Electrical

The kinetic (mechanical) energy from the rotating turbine wheel is converted into electrical energy in the electrical generator which transported through the electrical circuit

4) Electrical → Thermal

The electrical energy from the electric current is then converted into thermal energy as the current passes through the resistors in the heating filament

5) Thermal → Thermal

The heated filament transfers thermal energy to the the water in the beaker by conduction which raises the temperature of the water such that as the water acquires more thermal energy it turns into steam

Therefore, we have the flow of energy from the falling water to steam as follows;

1) Mechanical 2) Mechanical 3) Electrical 4) Thermal 5) Thermal

Answer:

C

Explanation:

During an investigation you want to investigate different variables.

Answer:

During an investigation, you want to investigate one variable at a time

Explanation:

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