After a big snowfall, you take your favorite rocket‑powered sled out to a wide field. The field is 205 m across, and you know that your sled accelerates at a rate of 3.95 m/s2 when the rocket is on. How fast will the sled be moving when it reaches the other end of the field?

Answer:

In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus a column of fluid, or an object submerged in the fluid, experiences greater pressure at the bottom of the column than at the top. This difference in pressure results in a net force that tends to accelerate an object upwards.

The pressure at a depth in a fluid of constant density is equal to the pressure of the atmosphere plus the pressure due to the weight of the fluid, or p = p 0 + ρ h g , p = p 0 + ρ h g , 14.4

Granite: 2.70 × 10 32.70 × 10 3

Lead: 1.13 × 10 41.13 × 10 4

Iron: 7.86 × 10 37.86 × 10 3

Oak: 7.10 × 10 27.10 × 10 2

Answer:

potential lines that are perpendicular to the electric field, they must be parallel to the plates

Explanation:

A and C) for this drawing, as the electric field lines go from the positive plate to the negative plate and are horizontal to the potential lines that are perpendicular to the field, they must be parallel to the plates, see attached part a

B) in this case the ground has an energy of zero and the lines are parallel to the ground, see attached part b

Potential energy is the energy acquired by an object by virtue of its position.

Potential energy of the ball at the 4th step = 40 J

Let the mass of the ball, m is 1 kg

So, potential energy at 4th step,

mgh = 40

h = 40/1 x 9.8

h = 4.1 m

So, the height of each steps, h' = 4.1/4

h' = 1.025 m

Therefore, potential energy at 1,

PE₁ = 1 x 9.8 x 1.025

PE₁ = 10.045 J

Therefore, potential energy at 2,

PE₂ = 1 x 9.8 x 2 x 1.025

PE₂ = 20.09 J

Therefore, potential energy at 3,

PE₃ = 1 x 9.8 x 3 x 1.025

PE₃ = 30.13 J

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The direction in which the 25 kg mass will move is to the Left. The correct option is A.

This is because the force pulling to the left is greater than that to the right.

The velocity of the mass after 1 second will be 0.4 m/s

The velocity of the mass after 2 seconds will be 0.8 m/s

The net force o the mass of 25 kg is given below:

Net force = 20 N - 10 N

Net force = 10 N

The velocity of the mass is given by the formula below:

Velocity = net force * time / mass

velocity after 1 second = 10 * 1 / 25

velocity after 1 second = 0.4 m/s

velocity after 2 seconds = 10 * 2 / 25

velocity after 2 seconds = 0.8 m/s

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We have to use the law of conservation of momentum, which states the following.

Using the definition of momentum (p = mv), we have the following.

Using the given magnitudes, we replace them and we solve for the velocity of the lead car.

i think photons with shorter wavelengths have larger speed.

I apologise if its incorrect.

Answer:

energy

Explanation:

1,401.88 N is the required weight of the man using the given conversion factor.

To calculate the weight of a typical NFL lineman in Newtons, we need to first convert the weight from pounds to kilograms using the conversion factor of 1 kg = 2.2 pounds:

314 pounds ÷ 2.2 pounds/kg = 142.73 kg

Next, we can use the formula Weight (newtons) = mass * gravity, where gravity is approximately 9.81 m/s^2 (meters per second squared):

Weight (newtons) = 142.73 kg * 9.81 m/s^2 = 1,401.88 N

The required weight in Newton of the man is 1,401.88 N

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Explanation:

The resistance of a material is given by the formula as follows :

\(R=\rho \dfrac{L}{A}\)

Here,

\(\rho\) = resistivity of a material

L is the length of the material

A is the area of cross section of the material

So, the factors on which the resistance of a material depends are :

Length and area of cross section

Answer:

The bulk modulus of the liquid is 1.534 x 10¹⁰ N/m²

Explanation:

Given;

density of the liquid, ρ = 1500 kg/m³

frequency of the wave, F = 410 Hz

wavelength of the sound, λ = 7.80 m

The speed of the wave is calculated as;

v = Fλ

v = 410 x 7.8

v = 3,198 m/s

The bulk modulus of the liquid is calculated as;

\(V = \sqrt{\frac{B}{\rho} } \\\\V^2 = \frac{B}{\rho}\\\\B = V^2 \rho\\\\B = (3,198 \ m/s)^2 \times 1500 \ kg/m^3\\\\B = 1.534 \ \times 10^{10} \ N/m^2\)

Therefore, the bulk modulus of the liquid is 1.534 x 10¹⁰ N/m²

Answer:

Probably copper wire

Explanation:

I took the class and that's the only one that sounds right but I'm pretty dum lol

Answer:D

Explanation:

R =  

V

I

=  

120 volt

0.8 ampere

=  150 ohm (Ω)

P =  V × I

=  120 volt × 0.8 ampere

=  96 watt (W)

An electric light installation  can draw Power of 96 Watt  at 120 V if it creates a current of 0.8 amps

Electric power  is the rate of electric energy transfer by an electric circuit per unit time . It is denoted by P and measured using the SI unit of power that is Watt (W)

since, Electric Power   = voltage * current

Power    = 120 V * 0.8 A

Power    = 96 Watts

An electric light installation  can draw Power of 96 Watt  at 120 V if it creates a current of 0.8 amps

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The average acceleration of the motorcycle over the given distance is approximately 9.39 m/s².

To calculate the average acceleration of the motorcycle, we can use the formula:

Average acceleration = (final velocity - initial velocity) / time

First, let's convert the final velocity from km/h to m/s since the distance is given in meters. We know that 1 km/h is equal to 0.2778 m/s.

Converting the final velocity:

Final velocity = 78 km/h * 0.2778 m/s = 21.67 m/s

Since the motorcycle starts from rest (initial velocity is zero), the formula becomes:

Average acceleration = (21.67 m/s - 0 m/s) / time

To find the time taken to reach this velocity, we need to use the formula for average speed:

Average speed = total distance/time

Rearranging the formula:

time = total distance / average speed

Plugging in the values:

time = 50 m / 21.67 m/s ≈ 2.31 seconds

Now we can calculate the average acceleration:

Average acceleration = (21.67 m/s - 0 m/s) / 2.31 s ≈ 9.39 m/s²

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Determine the planet's radius and mass. Use the formula g=GMR2 to get the acceleration 93.63×10¹⁶m/s brought on by gravity on that planet's surface.

The most practical formula for estimating the acceleration caused by gravity is given by these two laws: g = G*M/R2, where g is the acceleration caused by gravity, G is M represents mass, R is distance, and G is the gravitational constant of the universe.

g = G*M/R2,

g = 5.972×10²⁴/ 6.378×10⁶

g = 5.972×10¹⁸/6.378

g = 93.63×10¹⁶m/s

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The reaction between the Hydrogen gas with Oxygen gas and adding a small bit of energy is called a combustion reaction.

This is a description of a chemical reaction between hydrogen gas (H₂) and oxygen gas (O₂) to form water (H₂O), which is an example of a combustion reaction.

In this reaction, hydrogen gas and oxygen gas react with each other to form water vapour (H₂O), which then condenses on the sides of the container to form water droplets.

The energy added to the system (in the form of a spark or heat) provides the activation energy needed to initiate the reaction. The reaction releases a large amount of energy in the form of heat and light, which is what causes the explosion.

The balanced chemical equation for this reaction is:

2H₂(g) + O₂(g) → 2H₂O(g)

This equation shows that two molecules of hydrogen gas (H₂) react with one molecule of oxygen gas (O₂) to form two molecules of water vapour (H₂O). The reaction consumes all the hydrogen and oxygen and produces only water.

The appearance of water droplets on the side of the container indicates that the water vapour produced by the reaction has condensed back into a liquid state due to the cooling of the container. This is a common observation in combustion reactions that produce water vapour as a product.

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According to the give value of the mass of lemonade and change in the temperature, the specific heat capacity of the lemonade is 3.81 J/kg/k.

The formula for the specific heat capacity (C) = Q/ m × ΔT

Q is energy added and the value, which is 334J

m is the mass of the lemonade, which is 300g = 0.3 kg

Δ T is the change in temperature, which is 19°C =(273+19)= 292 K

So, C = 334/ 0.3 × 292

         = 3.81 J/kg/k

So the specific heat capacity of the lemonade is 3.81 J/kg/k.

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Answer:

The weight of the body is 3,924 N.

Explanation:

To solve this problem, we can use the formula for distance as a function of acceleration with initial velocity equal to zero:

distance = (1/2) x acceleration x time^2

We know that the distance the body is lifted is 20 meters, the time taken is 20 seconds, and the force applied is 200 N. We can use this information to calculate the weight of the body.

First, we need to calculate the acceleration:

distance = (1/2) x acceleration x time^2

20 = (1/2) x acceleration x (20)^2

acceleration = 0.5 m/s^2

Now that we know the acceleration, we can use the formula for weight:

force = mass x acceleration

We can rearrange this formula to solve for mass:

mass = force / acceleration

mass = 200 N / 0.5 m/s^2

mass = 400 kg

Finally, we can calculate the weight of the body using the formula:

weight = mass x gravity

Assuming a standard acceleration due to gravity of 9.81 m/s^2, we can calculate the weight:

weight = 400 kg x 9.81 m/s^2

weight = 3,924 N

Therefore, the weight of the body is 3,924 N.

Answer:

It has a mass of 40 kg.

Explanation:

Because Force = mass x Acceleration or F = m a, we could say that the mass is force/acceleration which in your case is 2,400/60 which equals 40 kg.

Answer:

1. Information Gathering

2. Analysis and Planning.

3. Implementation of a solution.

4. Assessment of the effectiveness of the solution.

5. Documentation of the incident.

Answer:

Refraction is another way that waves interact with matter. ... Waves bend as they enter a new medium because they start traveling at a different speed in the new medium. For example, light travels more slowly in water than in air. This causes it to refract when it passes from air to water or from water to air.

Explanation:

i hope this helps but if it doesnt im rlly srry :p

Answer: Conversation of Matter

Explanation: According to Quizlet, Converstion of Matter is the answer.

Answer:

yes

Explanation:

gl m8

The direction of the vector, with a y component of 49.6 and -49.6, and an x component of 68.4, makes an angle of approximately 39.2 degrees with the positive x-axis.

To find the direction of the vector, we can use the inverse tangent (arctan) function. The arctan of the y component divided by the x component will give us the angle that the vector makes with the positive x-axis.

Calculate the angle using the arctan function:

For the y component of 49.6: arctan(49.6 / 68.4) = 38.7 degrees

For the y component of -49.6: arctan(-49.6 / 68.4) = -38.7 degrees

Since we have both positive and negative values for the y component, we need to consider the signs to determine the correct angle.

The positive y component of 49.6 corresponds to an angle of 38.7 degrees.

The negative y component of -49.6 corresponds to an angle of -38.7 degrees.

To determine the overall direction, we can take the average of the two angles: (38.7 + (-38.7)) / 2 = 0 degrees.

The direction of the vector, with a y component of 49.6 and -49.6, and an x component of 68.4, is approximately 0 degrees with the positive x-axis.

Therefore, the vector makes an angle of approximately 0 degrees with the x-axis.

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The man's friend is at a distance 552.5 m away.

Speed of sound in air, v = 340 m/s

Time after which the echo is heard, t = 3.25 s

The expression for the total distance covered by the sound in the given time,

d = v x t

d = 340 x 3.25

d = 1105 m

Therefore, the distance where the friend is staying would be half of the total distance covered by the sound during the given time.

So, the distance of the friend from the man,

d' = d/2

d' = 1105/2

d' = 552.5 m

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This question involves the concept of  Newton's law of gravitation.

The force of gravity between the two spaceships is "1355.78 N".

According to Newton's Law of Gravitation:

\(F=\frac{Gm_1m_2}{r^2}\)

where,

Therefore,

\(F=\frac{(6.67\ x\ 10^{-11}\ N.m^2/kg^2)(500\ kg)(498\ kg)}{(35\ m)^2}\\\\\)

F = 1355.78 N = 1.356 KN

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Two space ships traveling next to each other. The first one is 500 kg and the second one is 498 kg. They are 35 meters apart, the Force of gravity between the two spaceships is 1355.78 N.

It is given that the First spaceship's weight (\(m_{1}\)) is 500 kg,

The second spaceship's weight (\(\rm m_{2}\)) is 498 kg.

The distance between spaceships (r) is 35 meters.

It is required to find the Force of gravity between these spaceships.

It is defined as the force which attracts any two masses in the universe.

By Newton's law of Gravitation:

\(\rm F= \frac{Gm_1m_2}{r^2}\)  , Where

\(\rm F = The\ force \ of \ gravity \ between \ the \ spaceships\\\rm G= Universal\ Gravitational \ Constant = 6.67 \times 10^{-11} N.m^2/kg^2\)

Putting values in the above formula:

\(\rm F = \frac{(6.67\times 10^{-11} N.m^2/kg^2)(500kg)(498kg)}{(35m)^2}\)

F = 1355.78 N = 1.356  KN

Thus, Two spaceships travel next to each other. The first one is 500 kg and the second one is 498 kg. They are 35 meters apart, the Force of gravity between the two spaceships is 1355.78 N.

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Answer:

elastic collision

An elastic collision occurs when the two objects "bounce" apart when they collide. Two rubber balls are a good example. In an elastic collision, both momentum and kinetic energy are conserved. Almost no energy is lost to sound, heat, or deformation.

I hope it's helpful!

Answer:

A high EQ (emotional intelligence)

In today's transitioning workplace, having a high EQ is the most important trait of a good boss. Bosses must be able to discern between their own personal beliefs and the thoughts and beliefs of others, and other generations (boomers, Gen X, xennials, millennials and now Gen Z).

Explanation:

hope it helps you

Answer:

f = 29605.2 [N]

Explanation:

To solve this problem we must use the following equation of kinematics, then use Newton's second law.

\(v_{f}^{2} =v_{o}^{2} -2*a*x\)

where:

Vf = final velocity = 300 [m/s]

Vo = initial velocity = 450 [m/s]

a = acceleration [m/s²]

x = distance = 7.6 [cm] = 0.076 [m]

Now replacing and clearing a

2*a*0.076 = (450² - 300²)

a = 740131.57 [m/s²]

Now using Newton's second law which tells us that the force on a body is equal to the product of mass by acceleration.

f = m*a

where:

f = friction force [N]

m = mass = 40 [g] = 0.04 [kg]

f = 0.04*740131.57

f = 29605.2 [N]