A 5000ton freight is moving at a speed of 10mph, next to it a 3250lb Ferrari is moving at a speed of 250mph. Both hit the breaks, but who stops first?​

The speed of the car2 after the collision is 6 m/s . The direction is towards the right.

We have to note that the momentum of the object would have to be the product of the mass and the velocity of the object. In the case of the cars that we have we have to recall that; Car 1 has a mass of 8.0 kg and is moving left at 3.75 m/s. Car 2 has a mass of 5.5 kg and is moving right at 2.00 m/s.

We already know that;

Momentum after collision = momentum before collision

(8 * 3.75) + (5.5 * 2) = (8 * 1) + (5.5 * v)

v = final speed of car 1

Then we have;

30 + 11 = 8 + 5.5v

v = 6 m/s

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The time taken by the planet Mars to complete one orbit of the Sun is 5.94 x 10⁷ seconds.

Given information: In the spring of 2021, the New Horizons spacecraft reached a distance of 50 astronomical units ("AU") from Earth. One astronomical unit is the distance from the Earth to the Sun or about 150 million km.

Calculation: To find how many km was New Horizons from Earth, we need to multiply the distance in AU by the conversion factor. 1 AU = 150 million km 50 AU = 50 x 150 million km = 7.5 billion km Thus, the New Horizons spacecraft was 7.5 billion km from Earth in the spring of 2021. Now, let's move on to the second question. The planet Mars completes one orbit of the Sun in 687 days. We need to express this time in seconds using scientific notation.

To convert days to seconds, we need to multiply the number of days by the conversion factor. 1 day = 86400 seconds 687 days = 687 x 86400 seconds= 5.94 x 10⁷ seconds (using scientific notation) Therefore, the time taken by the planet Mars to complete one orbit of the Sun is 5.94 x 10⁷ seconds.

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Explanation: Well, If you arrive in my class 45 seconds after leaving math, which is 90 meters away. you traveled 2m/s ( I hope this helped <3)

Both cubes A and B gained the same amount of heat since they have the same specific heat capacity. The heat gained by each cube is calculated by using the formula: Heat gained = mass x specific heat capacity x change in temperature.

Since the cubes have the same mass and specific heat capacity, the only difference is the change in temperature. Therefore, both cubes gained the same amount of heat. Q = mcΔT where Q is the heat gained, m is the mass of the cube, c is the specific heat capacity, and ΔT is the change in temperature.
Given that both cubes are pure tungsten and have the same specific heat capacity, they will also experience the same temperature change of 10 K. However, we don't have information about the masses of the cubes. If both cubes have the same mass, then they will gain the same amount of heat. If one cube has a larger mass, then it will gain more heat. Without knowing the masses of the cubes, we cannot definitively say which cube gained the most heat.

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A neutral stimulus will turn into a conditioned stimulus (CS) and cause a conditioned response (CR) that is comparable to the initial unconditioned response if it is combined with an unconditioned stimulus (US) that has already caused an unconditioned response (UR).

A neutral stimulus is one that first merely directs attention and doesn't elicit any specific responses. When coupled with an unconditioned stimulus in classical conditioning, the neutral stimulus becomes a conditioned stimulus. The neutral stimulus will also elicit a response, known as a conditioned response, with repeated presentations of both the neutral stimulus and the unconditioned stimulus.

So, CR i.e., conditioned response is after learning while NS i.e.,  Neutral Stimulus is before learning.

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F = ma

= 50kg × 2.5 m/s²

= 125 N

Answer : 125N

Explanation :

F = Force (N)

m = mass (kg)

a = acceleration (m/s²)

Bubba is supporting 194.8 N of the log's weight.

Weight in physics is the force that gravity applies to an object. Weight has both a magnitude and a direction, making it a vector quantity. The weight of an item is equal to the gravitational force exerted on it, which is defined by its mass and gravitational acceleration.

Given that,

Weight of the log = 974.0 N

Distance from one end to x = 1.2m

Therefore,

Weight from one end to x = (weight of the log/length of the log) x            distance from one end to x.

                                           = (974.0 / 5.0) x 1.2

                                           = 194.8 N

Therefore, Bubba is supporting 194.8 N of the log's weight.

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Answer:

metal, metalloid, and non-metals are the 3 regions on the periodic table

Explanation:

Answer:

Halogens, Akali, and noble gases

Explanation:

Answer:

After the dielectric is inserted the capacitance is increased hence the stored energy is also increased . It may be noted here that since voltage between the capacitor V0 is constant the electric field between the plates also remains constant .

Answer:

Since the two colliding objects travel together in the same direction after the collision, the total momentum is simply the total mass of the objects multiplied by their velocity.

Explanation:

Answer:

designing a solution

Explanation:

after knowing & identifying a problem we start putting a solution

Answer:

350Joules

Explanation:

According to law of Conservation of energy, the amount of energy at the used up at the start is equal to that at the end.

The initial energy used up is gravitational potential energy

Final energy at the lowest point is kinetic energy.

If the energy is conserved then it means energy is not used up during the process hence;

Initial Potential energy = Final kinetic energy

If the gravitational potential energy is 350Joules then her final kinetic energy at the lowest point will also be 350Joules

Answer:

chemical properties

Explanation:

i don't why I choose that answer....

The force of the body is obtained as 81144 N.

The term pressure is defined as the mass per unit area of a body. We have the pressure at the top of the tank as 225400 Pa and the area of the tank as 0.6 m by 0.6 m.

Thus;

Pressure = Force/Area

Force = Pressure * Area

Force = 225400 Pa *  0.6 m *0.6 m

Force = 81144 N

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Answer:

164.87 J

Explanation:

From the question,

Work done (W) = mghcosθ........................ Equation 1

Where m = mass of the box, h = height, g = acceleration due to gravity, θ = angle to the vertical

Given: m = 25 kg, h = 2.6 meters, θ = 75°.

Constant: g = 9.8 m/s²

Substitute these value into equation 1

W = 25×9.8×2.6×cos75°

W = 164.87 J.

Answer:

pH value is between 6.5 and 6.8

Explanation:

Explanation:

Milk fresh from the cow typically has a pH between 6.5 and 6.7. The pH of milk changes over

Given that the distance traveled by car is

The time taken by car is

The distance traveled by the sprinter is

The time taken by the sprinter is

We have to find that which is traveling faster and by how much.

First, we need to calculate the individual speed of the car and the sprinter.

The speed of the car can be calculated as

The speed of the sprinter can be calculated as

The speed difference between car and sprinter is

Thus, the speed of the car is greater than that of the sprinter by 22.8 m/s.

To increase the boiling temperature of 2051 g of water by 1.500 °C, approximately 3.431 grams of NaCl would need to be added.

Explanation:

The boiling point elevation is determined by the molality of the solute in the solution. The equation for boiling point elevation is:

ΔTb = Kb * m

Where:

ΔTb is the boiling point elevation,

Kb is the boiling point elevation constant for water (0.5100 °C/m),

m is the molality of the solute.

To calculate the molality, we can use the formula:

m = (moles of solute) / (mass of solvent in kg)

Given that we want to increase the boiling temperature by 1.500 °C, and the Kb value is 0.5100 °C/m, we can rearrange the equation to solve for the molality:

m = ΔTb / Kb

m = 1.500 °C / 0.5100 °C/m

m ≈ 2.941 m

To convert molality to mass, we need to know the molecular weight of NaCl. The molecular weight of NaCl is approximately 58.44 g/mol.

Using the formula:

mass of solute = molality * molecular weight of solute * mass of solvent in kg

mass of solute = 2.941 m * 58.44 g/mol * 2.051 kg

mass of solute ≈ 3.431 g

Therefore, approximately 3.431 grams of NaCl would need to be added to 2051 g of water to increase the boiling temperature of the solution by 1.500 °C.

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The equation for free fall at the surface of some planet (s in meters, t in seconds) is s=1.33t^(2), the long it take a rock falling from rest to reach a velocity of 27.2(m)/(s) on this planet is 1.414 seconds.

Free fall is a type of movement that an object undergoes when it falls freely under the effect of gravity. Gravity is a force that acts on every object and makes it move towards the center of the earth or any other celestial body. The acceleration due to gravity is expressed as g, and it is equal to 9.8 m/s² on earth. The time it takes a rock falling from rest to reach a velocity of 27.2 m/s on this planet can be calculated by equating the acceleration due to gravity with the given velocity.

The formula for velocity is given by V=U+at, where V is the final velocity, U is the initial velocity, a is the acceleration, and t is the time taken to reach the final velocity. Under free fall, the initial velocity is zero; therefore, the formula can be simplified to V = at.

Substituting the given values in the formula, we get 27.2=1.33t² × g or 27.2=1.33t² × 9.8.

We can simplify this equation to t² = (27.2)/(1.33 × 9.8) or t² = 2.

The square root of 2 is 1.414. Therefore, the time taken for the rock to reach a velocity of 27.2 m/s on this planet is 1.414 seconds.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 3.5 × 0.5 = 1.75

We have the final answer as

Hope this helps you

Answer:

5.9 km/hour

Explanation:

divide 12.5 by 2.1 and the answer is 5.9

Answer:

Suppose at time t1 = zero and v1 = 50 MPH

                    time t2 = 10 sec and v2 = 10 MPH

Change in speed   =  (v2 - v1) / (t2 - t1) = (10 - 50) MPH / (10 - 0) sec

Change in speed = -40 MPH / 10 sec = - 4 MPH / sec

If you specify the velocity as always East then

change in velocity = - 4 MPH East

Had the particle finished by moving in the Westerly direction  then

Change in velocity = (-10 - 50) MPH / 10 sec = -60 / 10 MPH = -60 MPH East

Where West was the positive direction

Initially v1 was 50 East and v2 was -10 East with a difference of 60 MPH

Technician B is correct because a refractometer is used to measure the specific gravity or concentration of a liquid, while a coolant leak from the water pump weep hole is not normal and indicates a problem with the cooling system.

Technician A is not correct, as coolant leaking out of the water pump weep hole is not normal and indicates a problem with the water pump.

Technician B is correct, as a refractometer is a device used to measure the specific gravity of a liquid by measuring the bending of light as it passes through the liquid. This is a commonly used tool in the automotive industry for measuring the concentration of antifreeze in coolant. Therefore, technician B is correct.

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 The liquid is being forced up against the stopper, Student A correctly asserts that the pressure at level C must be higher than air pressure.

Thus, The right column pulls down on the stopper when the liquid is taken from the left column, adding pressure to the liquid at level C.

The pressure at level C rises above atmospheric pressure as a result of this increased force.

Student C also presents a convincing argument when he claims that because the liquid is denser than air, the pressure at level C cannot be lower than atmospheric pressure. Pressure in a fluid rises with depth because of the weight of the fluid above.

ΔP = P_C - P_A, where P_C denotes the pressure at level C and P_A is the pressure at level A, and P denotes the pressure difference. Since the pressures at levels C and A are equal because they are at the same height, there is no pressure difference (P = 0). As a result, there is no pressure difference between level C and level A.

 Thus, The liquid is being forced up against the stopper, Student A correctly asserts that the pressure at level C must be higher than air pressure.

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Agent burt engle is chasing some more "bad" dudes and dudettes, when he notices his fuel gauge is running close to empty. he is approaching a hill (that makes an incline of 30 degrees with the horizontal) whose height is 49 m when suddenly, while travelling at 32 m/s, the car stalls on him.

To determine whether Agent Burt Engle will make it to the crest of the hill or not, we need to consider the forces acting on the car and the work done.

First, let’s calculate the gravitational potential energy (PE) of the car at the base of the hill:

PE = m * g * h

PE = 800 kg * 9.8 m/s² * 49 m

PE = 384,160 J

Now, let’s calculate the work done by the resistance force as the car moves up the hill:

Work = force * distance

The force acting against the car’s motion is the resistance force, which is given as 300 N. The distance traveled up the hill is the height of the hill, which is 49 m.

Work = 300 N * 49 m

Work = 14,700 J

Comparing the work done by the resistance force to the initial potential energy, we can determine if the car will make it to the crest of the hill:

If Work < PE, the car will make it to the crest of the hill.

If Work ≥ PE, the car will not make it to the crest of the hill.

In this case, 14,700 J ≥ 384,160 J, which means the work done by the resistance force is greater than the initial potential energy of the car. Therefore, Agent Burt Engle will not make it to the crest of the hill and will have to call for backup.

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The minimum compression of the spring needed to keep the block from falling is  0.0074 m and the minimum compression of the spring needed to keep the block from falling will increase if the mass of the block of wood is doubled.

A)The minimum compression of the spring needed to keep the block from falling is given by the expression,kΔx = mgsinθ + μmgcosθ

Here,m = 0.26 kg = 9.8 ms-2θ = 90° (since the block is pushed against a vertical wall)μ = 0.4 (coefficient of static friction between the block and the wall)k = 140 N/m

Therefore,140 Δx = 0.26 × 9.8 sin 90° + 0.4 × 0.26 × 9.8 cos 90°⇒ Δx = (0.26 × 9.8 × 0.4)/140⇒ Δx = 0.0074 m

Therefore, the minimum compression of the spring needed to keep the block from falling is 0.0074 m.

B) Doubling the mass of the block of wood will affect the minimum compression of the spring needed to keep it from falling.

Since the gravitational force acting on the block increases when the mass is doubled, the spring will need to be compressed more to balance the weight. Therefore, the minimum compression of the spring needed to keep the block from falling will increase if the mass of the block of wood is doubled.

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Answer:

so then the main bild and or project dont get ruined and to make sure everything will fit and work right

The highest angle, which is 23.5°, occurs at the summer solstice. The greatest altitude angle at midday is therefore 90° 40° + 23.5° Equals 73.5°.

On the solstice, the sun's angle at noon lowers by 1 degree for every point of latitude that is moved away from 23.5o. On the summer, the sun's angle at noon lowers by 1 degree for every point of latitude that is moved away from 23.5o.

Every day of the year, including the solstices, is the same duration of 12 hours. arcs of the solstices as seen from 20° latitude. The Sun reaches its highest point at 46.56° in the winter and 93.44° in the summer.

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If you increase the frequency of a sound wave four times, the speed will increase four times. The correct option is A.

Particles that are vibrating make up sound waves. These collide with other particles, causing them to vibrate, which allows the sound to escape the source.

Your ear drums vibrate as a result of air vibrations, which allows you to perceive sound. This vibration is transformed into messages, which proceed to your brain via a nerve.

When sound is produced, air molecules shake and collide, causing vibrations to travel between air molecules. The sound is transmitted by the vibrating particles, which also cause the ear drum to vibrate.

A sound wave's frequency can be increased four times without increasing its speed.

Thus, the correct option is A.

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Answer:

3rd one i think.

Explanation:

Answer:A and C

Explanation: I took the test lol

Two statement that are correct based on graph are A, At point 4, the concentration of NH₄, NH₂ and H₂ remain constant, and C, Equilibrium is reached after point 3.

Graphs are the mathematical representation of the data that is easy to understand.

The reaction is \(\rm 3H_2 + N_2= 2NH_3\)

The graph shows time on x-axis and concentration on y-axis.

Thus, the correct options are A and C.

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