A 119 kg that stands in a 141 kg rowboat at rest in still water. He faces the back of the boat and throws a 2 kg rock horizontally at a speed of 17 m/s. The boat recoils forward and comes to rest 2.32 m from its original position.
The acceleration of gravity is 9.8 m/s. Calculate the initial recoil speed of the bout Answer in units of m/s. part 2 of 3 Previous responses What is the loss in mechanical energy due to the frictional force exerted by the water? Answer in units of m/s.
What is the loss in mechanical energy due to the frictional force exerted by the water? Answer in unit of J.
What is the effective coefficient of friction between the boat and water?

The given statement that “rate of crystallization is higher when a solution is more saturated" is true.However, we must first understand the meaning of "crystallization" and "saturation" before answering the question.The process by which a solid forms from a liquid or gas phase is known as crystallization.

A solution is saturated if it contains the maximum quantity of solute that may dissolve in the solvent at a particular temperature and pressure. A solution can be classified as unsaturated if it contains less than the saturation level, and supersaturated if it contains more than the saturation level. What is the relationship between crystallization and saturation.

When a solution reaches its saturation point, the solute is no longer soluble in the solvent. As a result, any extra solute added to the solution will form crystals. Furthermore, when a solution is highly saturated, the crystals will form at a faster rate than when it is not as concentrated. As a result, the statement "rate of crystallization is higher when a solution is more saturated" is true.

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Answer:

C or m/s(meters per second)

Mass, Speed and Kinetic Energy.The independent variable changed to . the dependent variable for both part i and part ii was .

We can solve this by analysing the choices and the relations between variables.

It's worth noting that Kinetic Energy is proportional to both speed and mass. Actually, Kinetic Energy is exactly proportional to those factors, meaning that the more mass or speed, the higher the Kinetic Energy.

Having said that, Part I and Part II must have speed and mass as indendepent variable, because Kinetic Energy depends on them.

Then, in the third question, the answer is Kinetic Energy becase that's the dependent variable in both cases Part I and Part II.

Just to remember, the Kinetic Energy is defined as

\(KE=\dfrac{1}{2}mv^2\)

Where you can notice the relation between mass, speed and kinetic energy.

Therefore, the right answer are Mass (Part I), Speed (Part II) and Kinetic Energy (Part III).

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Answer

the right answer are Mass (Part I), Speed (Part II) and Kinetic Energy (Part III).

Explanation:

Answer:

Workdone = 8400 Nm

Explanation:

Given the following data;

Force = 2100 N

Distance = 4 meters

To find the work done;

Workdone = force * distance

Workdone = 2100 * 4

Workdone = 8400 Nm

Therefore, the amount of work done on the car is 8400 Newton meters.

The velocity of the plane is 120 km/hr.

Velocity is the pace at which an object's location is changing as perceived from a particular point of view and as measured by a certain unit of time (for example, 60 km/h northbound). Velocity is the direction at which an object is traveling. Velocity is a fundamental concept in kinematics, the branch of classical mechanics that deals with the motion of bodies. In order to be defined, the physical vector quantity known as velocity needs to have both a magnitude and a direction. Speed is a coherent derived unit whose quantity is measured in metres per second (m/s or m/s1) in the SI. Speed is the scalar absolute value (magnitude) of velocity (metric system). As opposed to "5 meters per second east," which is a vector, "5 meters per second," for instance, is a scalar.

Distance traveled = 360 km

Time taken = 3 hours

Hence, velocity = 360/3 = 120 kmph

Thus, the velocity of the plane is 120 km/hr.

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The time elapsed between a sound reaching your ear directly from the stage and the same sound reaching your ear after reflecting from the back wall is approximately 0.1167 seconds.

First, consider the round-trip distance travelled by the sound wave.

The sound wave travels from the stage to the back wall and then back to your ear. This creates a round-trip distance of twice the distance between the stage and the back wall.

Given that the distance between the stage and the back wall is 20.0 m, the round-trip distance is 2 * 20.0 m = 40.0 m.

To calculate the time elapsed, we can divide the round-trip distance by the speed of sound in air.

Time = Distance / Speed

Time = 40.0 m / 343 m/s

Time ≈ 0.1167 s

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the velocity of the wave is 400m/s

The formula for the velocity of the wave is, V = w/k

where ,  w is the coefficient of t and k is the coefficient of x

now putting values we get, v = 200/0.5 = 400

Hence the velocity of the wave is 400 m/s

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The amount of work done (output energy) by the coal power station at the given efficiency is 4.8 x 10¹¹ J .

The efficiency of a machine indicates how well its input energy is converted to useful output energy or work.

The efficiency of a machine is simply the ratio of output energy to input energy.

E = output energy / input energy x 100%

The given parameters;

40% = output energy / (1.2  x 10¹²)   x 100%

40/100 = output energy / (1.2  x 10¹²)

0.4(1.2  x 10¹²) = output energy

4.8 x 10¹¹ J = output energy

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When thrown from the balloon, the sandbag has a constant horizontal/forward velocity. As the text puts it, "the sandbag continues forward as if it had not been dropped." What this means is that the sandbag has no acceleration in the horizontal plane of motion, so it moves in this direction at a constant speed. So for any time \(t\), the horizontal velocity is given by

\(v_x(t) = 12\dfrac{\rm m}{\rm s}\)

In the vertical plane of motion, the sandbag has no vertical velocity until it's released and allowed to fall. As it's falling, however, the sandbag is being pulled down by gravity and is accelerating with magnitude \(g=9.8\frac{\rm m}{\mathrm s^2}\), so its vertical/downward velocity at time \(t\) is given by

\(v_y(t) = -gt\)

So, after 3 seconds have passed, the sandbag has horizontal velocity \(v_x = 12\frac{\rm m}{\rm s}\) and vertical velocity \(v_y = -g(3\,\mathrm s) = -29.4\frac{\rm m}{\rm s}\). If the question is specifically asking about speed you would just ignore the negative signs.

The correct answer is D. It asks about a cause-and-effect relationship between two variables.

Explanation:

In most cases, the purpose of a scientific investigation is to understand the way one phenomenon is affected by a specific factor. For example, through scientific investigation, it is possible to know to what extent nutrition affects learning or how temperature changes affect plant growth. This implies the factors involved, which are formally called variables, have a cause-and-effect relationship because it is expected one of the factors affects or changes the other. Moreover, in this investigation researchers cannot modify or change the results. In this context, the most appropriate statement for a scientific investigation is "It asks about a cause-and-effect relationship between two variables."

increases Below a temperature of 4°C (39°F), water exhibits an unusual behavior. As the temperature decreases,

water molecules begin to form a lattice-like structure due to hydrogen bonding. This arrangement causes the water molecules to spread out, leading to an increase in volume and a decrease in density. This phenomenon is known as the expansion of water upon cooling. When water reaches its maximum density at around 4°C (39°F), it starts to contract as the temperature decreases further. This behavior is the reason why ice floats on water, as it is less dense than the liquid water.

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Answer:

I would wanna meet juice if he was still alive ofc

Explanation:

When an electric field is present, the average speed at which electrons move through a conductor is known as drift velocity, and it is roughly 1mm per second.

The direction of the electric field, which points from higher potential to lower potential, is the opposite of the direction in which free electrons accelerate. As a result, the free electrons shift from a potential of lower to one of higher.

Relationship between KE and W: A net force's work on an object is equal to the change in kinetic energy of the object. W = KEi - KEf.

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The object travels a distance of =54m If starts with initial velocity of 12m/s.

Velocity is the high indicator of the position in addition to the rapidity of the object. it is able to be defined as the distance blanketed by means of an object in unit time. velocity can be described because the displacement of the item in unit time. Pace is the time price at which an object is transferring along a path, whilst speed is the rate and direction of an object's motion.

Velocity is a vector expression of the displacement that an object or particle undergoes with appreciate to time. velocity is defined as a vector size of the price and route of motion. put really, velocity is the velocity at which some thing moves in one path. the speed of a car traveling north on a primary parkway and the velocity a rocket launching into space can both be measured the usage of velocity.

Given,

   Acceleration =  4 m/s^2

 Time = 3 second

S = u t +1/2at²

s=12*3+0.5*4*3*3

=36+18

=54m                          answer

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Answer:

Answer:

vibrates, and they carry energy from one place to another. Look at the sound wave and the water wave. vibrating electric charges and can travel through space where matter is not present. to particle, electromagnetic waves travel by transferring energy between vibrating electric and magnetic fields.

I= V/R

R= V/I these are the other two quantities

The speed of the cars after the collision is approximately 19.47 m/s.

To determine the speed of the cars after the collision, we need to apply the principle of conservation of momentum.

The momentum of an object is given by the product of its mass and velocity: momentum = mass × velocity.

Given:

Mass of the first car (m₁) = 1500 kg

Velocity of the first car (v₁) = 90 km/h toward the east

Mass of the second car (m₂) = 3000 kg

Velocity of the second car (v₂) = 60 km/h toward the south

To use the principle of conservation of momentum, we need to convert the velocities to a common unit. Let's convert them to m/s.

Converting velocities:

v₁ = 90 km/h = (90 × 1000) / 3600 = 25 m/s (eastward)

v2 = 60 km/h = (60 × 1000) / 3600 = 16.7 m/s (southward)

The total momentum before the collision is equal to the total momentum after the collision, as momentum is conserved.

Total momentum before collision = Total momentum after collision

(m₁ × v₁) + (m₂ × v₂) = Total mass × Final velocity

(1500 kg × 25 m/s) + (3000 kg × 16.7 m/s) = (1500 kg + 3000 kg) × Final velocity

Simplifying the equation:

37500 kg·m/s + 50100 kg·m/s = 4500 kg × Final velocity

87600 kg·m/s = 4500 kg × Final velocity

Dividing both sides by 4500 kg:

Final velocity = 87600 kg·m/s / 4500 kg

Final velocity ≈ 19.47 m/s

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Over the elastic range, the deformation of a spring is directly proportional to: B. the applied force.

Hooke's law states that the deformation (strain) of a spring is directly proportional to the applied force (stress) within the elastic range of the spring.

According to Hooke's law, the applied force affects the motion of an object attached to the end of a horizontal spring on a frictionless horizontal track.

Mathematically, Hooke's law force is modeled by this mathematical expression:

F = -kx

Where:

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Answer:

v = 1.5 m/s

Explanation:

m = 85 kg

p = 125 kg m/s

v = ?

p = m v

125 kg m/s = (85 kg) (v)

v = (125 kg m/s) / (85 kg)

v = 1.47 m/s

Answer:

Resistance / Edge 2022

Explanation:

This is late, but just in case someone needs the answer. Hope this helps!

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Tungsten metal is used exclusively for making the filament of electric bulbs because it has a very high melting point

Tungsten metal is used exclusively for making the filament of electric bulbs because it has a very high melting point. Due to its high melting point, the tungsten filament can be kept white-hot without melting away

Tungsten wire is used as the filament in light bulbs. It glows white-hot as current passes through it.

Tungsten is used in light bulbs because its high resistivity converts electric energy into light and heat.

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To solve this problem, we need to use the fact that the weight lifted by the hot-air balloon is equal to the weight of the air displaced by the balloon. We can use the following formula to find the volume of the balloon:

Volume of balloon = Weight lifted / Density difference between hot air and outside air * gravitational acceleration

We are given the weight lifted by the balloon, which is 6453 N. The density of the outside air is 1.205 kg/m^3, and the density of the hot air inside the balloon is 0.9671 kg/m^3. The gravitational acceleration is 9.81 m/s^2.

Substituting these values into the formula, we get:

Volume of balloon = 6453 N / (1.205 kg/m^3 - 0.9671 kg/m^3) * 9.81 m/s^2
Volume of balloon = 6453 N / 0.238 kg/m^3 * 9.81 m/s^2
Volume of balloon = 22131.633 m^3

Therefore, the volume of the balloon is 22131.633 m^3.

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The average speed of the car is 35.6m/s

The average speed is the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity. It is represented by the magnitude and does not have direction. It is measured in meter per second

Therefore average speed = total distance / total time taken

The total distance here is 500+ 500= 1000km = 1×10⁶m

the time taken for the first journey = 500×1000/35= 14285.71 seconds

the time taken for traveling back = 500000/43= 11627.91 seconds

total time taken = 14285.71 + 11627.91 = 25913.62seconds

therefore average speed = 1000000/25913.62

= 35.6m/s

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