6. A concrete mixer truck has a mass of 8400kg when it is empty and 18 000kg when its drum is
full of concrete. The density of concrete is 2400kg/m^3
Calculate the volume of concrete that the truck can car

The primary indicator of an object's position and speed is its velocity.It is the distance that an object travels in one unit of time.The displacement of the item in one unit of time is the definition of velocity.

Smax = 400 feet.

c) v = 32 ft/s

c) v = - 32 ft/s

(a)

The following is the function provided for ball height:

s = 160 t - 16 t²

Therefore, we must take the derivative with respect to t and make it equal to zero in order to get the time to reach maximum height (in-flexion point):

So, 160 - 32 t = 0, 32 t = 160 t, and 160/32 t = 5 sec.

As a result, the maximum distance is covered every 5 seconds.

Smax = (160)(5) - (16)(5)²

Smax = 800 - 400

Smax=400 feet

b)First, we determine the speed at which the ball travels 384 feet.

384 = 160 t - 16 t

16 t² - 160 t + 384 = 0

Quadratic Equation Solving:

Either:

t = 6 sec

or t = 4 seconds

Since it takes 5 seconds to reach the highest point,

t then equals 5 seconds.

t then equals 4 seconds.

Now, by taking a derivative of ods with respect to t at 4 sec, we can find velocity:

v = 160 - 32 t

v = 160 - (32)(4)

v = 32 ft/s

c,Because t = 6 s > 5 s

The second number of t = 6 sec must represent the point in the ball's downward motion when it is 384 feet above the earth.

So, at that moment, velocity will be:

v = 160 - (32)(6)

v = -32 ft/s

downward motion is a bad sign.

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Answer: definitely parallel !

Explanation: Hope This helps!

Answer:

B:parallel

Explanation:

just finished cumulative exam and this was a question

Answer:

the green ball has 4J more energy

Explanation:

The kinetic energy is given by the formula

K = 0.5 m v^2

the kinetic energy of the red ball:

K(red) = 0.5*10*3^2= 45J

of the green ball:

K(green)=0.5*8*3.5^2 = 49J

therefore the green ball has more energy by 4 Joules

Change in momentum formula

The change in momentum resulting from an external force is called the impulse (I=mv-mvo) and is related to the force applied through the Impulse-Momentum Theorem: I = F tc = mv - mvo . Here F is the external force applied and tc is the amount of time the force is in contact with the object.

The final velocity ( Vf ) of the cart at rest is : 0.5 m/s

Change in momentum of the objects  = m₁ * ΔV = m₂ * ΔV --- ( 1 )

Given that momentum ( p ) = m * v

where ; m₁ = 10 kg , p = 10 kg.m/s , v = ?

calculate for v

v = p/m = 10 kg.m/s / 10 kg

            = 1 m/s

Back to equation ( 1 )

= 10 * ( 1 m/s ) =  20 * ( Vf - )

= 10 = -20 Vf  

therefore Vf ( final velocity of cart at rest ) = 10 / 20

                                                                      = 0.5 m/s

Hence we can conclude that The final velocity ( Vf ) of the cart at rest is : 0.5 m/s

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The distance the car would travel when it hit the barrier before coming to a stop is 14.6 m.

The distance travelled by the car before stopping is calculated by applying third kinematic equation as shown.

v² = u² - 2as

where;

when the car stops,  the final velocity will zero, v =  0

0 = u² - 2as

2as = u²

s = u²/2a

The given parameter;

initial velocity of the car, u = 110 km/h = 30.56 m/s

a = 32 m/s²

s = (30.56²) / (2 x 32)

s = 14.6 m

Thus, when the car hits the soft barrier, it will slow down and travel a distance of 14.6 m before coming to rest.

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Surface-level diversity refers to the easily observable characteristics of individuals while deep-level diversity refers to the less visible characteristics. The link between attitude and behavior is that our attitudes often influence our behaviors.

Race, age, gender, and physical appearance are some of the characteristics under surface-level diversity. On the other hand, characteristics such as personality, values, beliefs, and attitudes, are some of deep-level diversity.

The link between attitude and behavior is that our attitudes often influence our behaviors. For example, if someone has a positive attitude towards exercise, they are more likely to engage in physical activity. However, it is important to note that attitudes do not always predict behavior, as there can be other factors that influence our actions, such as social norms and external pressures.

In the context of diversity, understanding both surface-level and deep-level diversity can help organizations create a more inclusive and respectful workplace. By acknowledging and valuing the differences among employees, organizations can create a positive work environment and foster better teamwork and collaboration.

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Answer:

A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.

answer C is the correct one

Answer:

c

Explanation:

i took test and it was correct

Answer:

Explanation:

The work done by an object can be found by using the formula

From the question

force = 400 N

distance = 50 m

We have

work done = 400 × 50

We have the final answer as

Hope this helps you

To determine flow rate, I conducted an experiment by measuring the volume of water collected in a container over a specific period of time.

To determine the flow rate of water from a tap or water source, I followed a simple experiment using a container and a stopwatch. First, I selected a suitable container with known volume markings, such as a measuring jug. Then, I placed the container under the tap and ensured it was positioned securely to collect all the water without any spillage.

Next, I turned on the tap to its maximum flow and started the stopwatch simultaneously. I allowed the water to flow into the container for a specific duration, such as one minute, to ensure accurate measurements. During this time, I made sure to avoid any disruptions or obstructions to the water flow.

Once the predetermined time elapsed, I stopped the stopwatch and carefully measured the volume of water collected in the container. It is essential to ensure accurate measurements by aligning the container with the appropriate volume markings and checking from eye level.

By dividing the measured volume of water by the duration of time in minutes, I calculated the flow rate in liters per minute. For instance, if 1 liter of water was collected in one minute, the flow rate would be 1 liter/minute.

To improve the accuracy of the flow rate measurement, it is advisable to repeat the experiment multiple times and calculate the average flow rate. Additionally, it is important to note that the flow rate can vary depending on factors such as water pressure, pipe diameter, and any obstructions in the plumbing system. Regular maintenance and inspection of the tap or water source can help ensure optimal flow rates.

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Looking at your spectroscope, you see several discrete, clearly defined lines. The one possible source for this spectrum is fluorescent lamp.

What is fluorescent lamp?

A  fluorescent lamp is a low pressure mercury lamp or discharge bulb. When the light spectrum emitting from the fluorescent bulb fall on the spectroscope, it releases several discrete lines.

In this lamp, fluorescence source is used which produces visible light when it lights up.

Moreover, a fluorescent lamp alters electrical energy into chemical energy or light more efficiently than the incandescent lamp.

Simply put, fluorescent lamps are more efficient than other lamps and are mostly used for commercial and outdoor application as they use 75% less electricity.

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Answer: The particles of a solid are [generally] closest together while those of a gas are farthest apart

Explanation:

8.20 × 10¹⁶ MeV of energy is emitted during the fission of one 235U nucleus.

Energy can only be transformed from one form to another; it cannot be created or destroyed.

When a nucleus of 235U is bombarded by a neutron, it absorbs the neutron and becomes unstable. This causes the nucleus to split (fission) into two smaller nuclei, releasing energy in the form of gamma rays, kinetic energy of the fission fragments, and neutrons. The total energy released in a fission event can be calculated using Einstein's famous equation E=mc², where E is the energy, m is the mass defect (the difference in mass between the initial nucleus and the fission products), and c is the speed of light.

For a single fission event of 235U, on average, the fission products have a combined mass of about 235 atomic mass units (AMU), while the mass of the neutron is about 1 AMU. This means that the mass defect for one fission event is:

Δm = (235 + 1) AMU - 235 AMU = 1 AMU

Using the conversion factor 1 amu = 931.5 MeV/c², we can convert the mass defect to energy:

ΔE = Δm × c² = 1 AMU × (931.5 MeV/c²) × (3.00 × 10⁸ m/s)² = 8.20 × 10² MeV

Therefore, the energy released when one 235U nucleus undergoes fission is 8.20 × 10¹⁶ MeV.

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The relative motion of the train next to her is the motion of the other train in her rest frame.

As the other train leaves, it seems to Sunita as if her train is moving backwards

Reason:

The motion of the train Sunita is taking is given by the rate of movement of

objects outside the train from the front side of the train towards the back

side of the train, that way she can tell that the train is moving.

The motion of the other train from the rear side of the train from the rear

side of the train to the front side is a reverse motion to what Sunita

observes when the train is moving forward. Therefore, as the other train

leaves, it seems to Sunita as if her train is moving backwards.

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Answer:

The strength of gravity decreases.

An example of that would be if you were in space; you float around because there's no gravity.

Answer:

v= 4.8 m/s

Explanation:

m= 2.0

KE= 1/2 mv^2

v= ?

v= 1/2 (2.0)^2

v= 4.8 m/s

Answer:

A. True

Explanation:

edge 2022

The blue, hotter stars tend to have shorter lifetimes than the , cooler stars; this is a true fact as the lifespan of a star is determined by its mass. Blue, hotter stars have higher masses than red, cooler stars.

The lifespan of a star is largely determined by its mass because a star's mass affects its internal pressure, temperature, and nuclear fusion rate, and more massive stars have stronger gravitational forces, which lead to higher pressures and temperatures in their cores. The rate of nuclear fusion reactions in a star determines how quickly it consumes its fuel, which in turn affects the lifespan of the star. Blue, hotter stars have a higher rate of nuclear fusion reactions and consume their fuel much more quickly than red, cooler stars.

Hence, the blue, hotter stars tend to have shorter lifetimes than the redder, cooler stars.

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(A) A faster speed requires more total energy.

The kinetic energy of an object is given by the formula KE = (1/2)mv², where m is the mass of the object and v is its velocity. The energy required to cover a distance is the product of the force applied and the distance traveled. In the case of the kangaroo hopping, the force is supplied by the kangaroo's muscles, and the energy required is proportional to the distance traveled and the work done to overcome friction and air resistance.

When the kangaroo hops faster, it has a greater velocity, which means it has more kinetic energy. This requires more total energy to cover the same distance. Additionally, air resistance and friction increase with velocity, so the energy required to overcome these forces also increases with speed. Therefore, a faster speed requires more total energy.

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The correct statement that indicates the correct mass of the raindrop in grams has a mass of 4 x 10⁻³ grams.

Which statements indicates the correct mass of the raindrop in grams?

The raindrop has a mass of 4 x 10⁻³ grams is the correct statement that indicates the correct mass of the raindrop in grams.

Mass is the measure of the amount of matter in an object. The metric unit of mass is the gram (g).

The mass of a raindrop is 4 milligrams.1 milligram is 0.001 grams. Therefore,4 milligrams = 4 x 0.001 grams = 0.004 grams.

Using scientific notation, 0.004 grams can be written as 4 × 10⁻³ grams.

Thus, the correct statement that indicates the correct mass of the raindrop in grams is: The raindrop has a mass of 4 x 10⁻³ grams.

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According to diagram, the approximate abundance of oxygen atoms in the galaxy is 1/1000 that of hydrogen.

If we look along the vertical axis, we find that the point for oxygen lies about halfway between the points  10−4 and 10−2, near to 10−3, which is 0.001 or 1/1000. Therefore, the abundance of oxygen atoms is about 1/1000 that of hydrogen.

The general trend in elemental abundance in our galaxy: There is a general trend of increasing abundance with increasing atomic number. Exceptional rule is that elements with odd atomic numbers tend to be more abundant compared to elements with even atomic numbers. These abundances decrease smoothly from atomic number of 6 to atomic number of 20. These abundances fluctuate randomly.

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The statement that is false is: "If one observer measures two events to be simultaneous, all observers must agree on their simultaneity." In special relativity, the relativity of simultaneity means that whether two events occur at the same time depends on the observer's reference frame.

In special relativity, the relativity of simultaneity means that whether two events occur at the same time depends on the observer's reference frame. Different observers moving at different velocities may disagree on whether two events occur simultaneously or not. Time dilation and the order of events being different for observers in different reference frames are both observations verified by experiments. Time runs slower in the reference frame of anyone moving relative to you is a prediction of special relativity. Time runs slower near a black hole is a prediction of general relativity.

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Answer:

Good government

Explanation:

Many people will think its natural resources but its not. Africa is a proof. They have resources but leadership is what makes most of their countries 3rd world. #BADGOVERNANCE

Answer:

A 2.5 g bullet traveling at 350 m/s hits a tree and slows uniformly to a stop while penetrating a distance of 12 cm into the tree's trunk. What is the initial kinetic energy of the bullet? 153.125 J Correct: Your answer is correct.Jan 8, 2020

Explanation:

The radius of Earth to have the same mass density as matter in a nucleus is 1.80 x 10^3 m.

The density of a body is given by the following expression;

Density = Mass/Volume

Let the radius of Earth be r.

As the earth is a sphere, hence its volume will be 4/3 x π x r^3

So, the equation becomes

Density = Mass/(4/3 x π x r^3)

The mass of the earth is given as 5.98 x 10^24 kg and the density of the nucleus is given to be 2.4 x 10^14 m.

2.4 x 10^14 = 5.98 x 10^24/ (4/3 x 3.14 x r^3)

On Solving the above equation, the radius r comes out to be

r = 1.80 x 10^3 m.

Hence, The radius of Earth to have the same mass density as matter in a nucleus is 1.80 x 10^3 m.

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Answer:

Strains can be acute or chronic. An acute strain is caused by trauma or an injury such as a blow to the body; it can also be caused by improperly lifting heavy objects or over-stressing the muscles. Chronic strains are usually the result of overuse--prolonged, repetitive movement of the muscles and tendons.

Explanation:

Answer:

JJJJJJJJJJJJJ

Explanation:

KKKKKK

Answer: the answer is 108 N

Just took the test and got 108 N correct

The required solar energy collection rate, in Btu/h is 6,000,000.

Solar energy stored in large bodies of water, called solar pounds, is being used to generate electricity. If such a solar power plant has an efficiency of 3 percent and a net power output of 180 kW, the average value of the required solar energy collection rate, in Btu/h can be calculated as follows:

Given, efficiency of solar power plant = 3%Net power output = 180 kW We know that the solar power is given by ;P = ηQWhere, P = Power outputη = efficiency Q = Solar energy collection rate Substituting the values of η and P in the above equation, we get;180,000 W = 0.03Q

Therefore, Q = 180,000 / 0.03Q = 6,000,000 Btu/hence, the required solar energy collection rate, in Btu/h is 6,000,000.

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Answer:

option A 4kg is your answer

Explanation:

given

mass(m)=?

velocity (v)=5m/s

we have

kinetic energy =50J

1/2 ×{m×v²)=50

m×5²=50×2

m=100/25=4 kg