A 1500 kg car traveling east at 20 m/s collides with a moving 2500 kg truck moving 30 m/s west..  After they collide, the two interlock and move together.  What was the final velocity of the truck? (Hint-momentum is a vector and direction matters, use + or - values as appropriate)*
A. 11.25 m/s west
B. 11.25 m/s east
C. 32.6 m/s east
D. 32.6 m/s west​

Answer:

D. it is vector

Explanation:

Well it have both direction and magnitude

It's direction is same as the direction of velocity

When a truck moving across an ice road is spreading sand across the ice in a closed system. The truth statement include

A closed, isolated system means that no matter is entering or leaving the system, and no external forces are acting upon it.

Therefore, the mass of the truck remains the same, and if there are no external forces acting upon the truck, its velocity would remain unchanged. Spreading sand on the ice would not affect the mass or velocity of the truck itself.

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Answer:

The branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.

Answer:

The mass of the water in 1 kg (9.8 N = m (9.8 m/s/s)),

Thus the volume of the water is 1000 ml.

5 = (Mau + Mal)/(Vau + Aal)  

(Density = total mass to the total volume)

We know that:

19.2 = Mau/Vau and 2.5 = Mal/Val.  

We have to find the volume. Therefore,

5Val + 5Vau = Mau + Mal

5(Mal/2.5) + 5(Mau/19.2) = Mau + Mal

Mal = 0.74 Mau

5 kg = M(au) + (1/.74)M(au)

=> M(au) = 2.13 kg

Weight of gold = 20.8 N

hence the weight of the gold is 20.8 N

An expectant father paces back and forth. The value of C in units is 1 m/s;  The value of D in units is -1.5 m/s.

The speed and direction of an object's motion are measured by its velocity. It is a vector quantity, which means that it has magnitude (or direction) and magnitude (or size). Meters per second (m/s) is a common unit of velocity. It is the rate at which an object moves in a specific direction. Typically, velocity is calculated by taking the time derivative of the position function.

Fathers Velocity for Segment C,

[tex]V_{c}[/tex] = (3- 2)/(3-2)

[tex]V_{c}[/tex] = 1 m/s

Fathers Velocity for Segment D,

[tex]V_{d}[/tex] = (0 - 3)/(5 - 3)

[tex]V_{d}[/tex] = -3/2

[tex]V_{d}[/tex] = - 1.5 m/s

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The maximum potential energy for the pendulum bob is approximately 1.3817 J.

What is Potential Energy ?

Potential energy is a form of energy that an object possesses by virtue of its position, shape, or configuration. It is the energy that an object has due to the work done on it, or that it can do due to its position or state. The potential energy of an object is often associated with the force that acts on it.

The maximum potential energy for the pendulum bob can be calculated using the formula:

Potential energy = mgh

where m is the mass of the pendulum bob, g is the acceleration due to gravity, and h is the maximum height reached by the pendulum.

In this case, the mass of the pendulum bob is 0.85 kg, the maximum height reached by the pendulum is 18 cm or 0.18 m, and the acceleration due to gravity is 9.81 m/s^2. Substituting these values into the formula, we get:

Potential energy = 0.85 kg x 9.81 m/s^2 x 0.18 m

Potential energy = 1.3817 J (rounded to four decimal places)

Therefore, the maximum potential energy for the pendulum bob is approximately 1.3817 J.

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The principle of physics behind crumple zones and airbags  design is to dissipate the force of an impact over a larger area, reducing the maximum force experienced by the occupants of the car.

Crumple zones and airbags are two important safety features in modern cars that reduce the chance of death or injury in the event of a collision.

Crumple zones work by collapsing in a controlled manner during a collision. The energy of the impact is absorbed by the deformation of the metal, reducing the force experienced by the passengers.

Airbags work by rapidly inflating in the event of a collision, cushioning the occupants of the car and reducing the force they experience. This works by distributing the force of the impact over a larger area, reducing the maximum force experienced by the body.

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Answer:

We can use the following kinematic equation to solve the problem:

Δx = v1(t) + (1/2)a2t²

where Δx is the initial separation between the two cyclists, v1 is the velocity of the leader, a2 is the acceleration of the second-place cyclist, and t is the time taken for the second-place cyclist to catch up with the leader.

Substituting the given values, we get:

9.60 m = (11.1 m/s)t + (1/2)(1.20 m/s²)t²

Simplifying and rearranging the equation, we get a quadratic equation in t:

0.6t² + 11.1t - 9.60 = 0

We can solve for t using the quadratic formula:

t = [-11.1 ± √(11.1² - 4(0.6)(-9.60))] / (2(0.6))t = [-11.1 ± 12.7] / 1.2

t = 0.91 s or t = -18.43 s

Since time cannot be negative, we can discard the negative solution. Therefore, the time taken for the second-place cyclist to catch up with the leader is:

t = 0.91 s

Hence, it will take 0.91 s for the second-place cyclist to catch up with the leader.

Explanation:

The farthest that particular object will move along the x-axis in the positive direction is 0.2 m. This is the amplitude of the pendulum's motion.

Potential energy in physics is the energy that an item retains as a result of its position in relation to other objects, internal tensions, electric charge, or other elements.

Since the total energy of the object is given by E = U + K, where U is the potential energy and K is the kinetic energy, and the pendulum has a small amplitude, we can assume that the kinetic energy of the object is negligible.

Therefore, we have:

E = U = [tex](1/2)kx^2[/tex]

Khere k is the spring constant of the pendulum and x is the displacement from the equilibrium position.

So, the value of x can be:

x = sqrt(2E/k)

Substituting the given values, we have:

x = sqrt(2(0.4 J)/(20 N/m)) = 0.2 m

Thus, the farthest the object moves along the x-axis in the positive direction is 0.2 m.

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Answer:

B. force equals mass multiplied by acceleration

Explanation:

Newton's second law of motion states that the acceleration of an object equals the net force acting on the object divided by the object's mass. According to the second law, there is a direct relationship between force and acceleration and an inverse relationship between mass and acceleration.

Newton's second law of motion is F = ma, or force is equal to mass times acceleration.

Answer:

the apparent displacement or the difference in apparent direction of an object as seen from two different points not on a straight line with the object.

The pressure of oxygen in dry air at standard atmospheric pressure is approximately 22.3 kilopascals.

The overall pressure of a gas mixture is equal to the sum of the partial pressures of each gas in the mixture, according to Dalton's law of partial pressures.

With a few other gases present in trace levels, nitrogen and oxygen make up roughly 78% and 21% of the atmosphere, respectively, in dry air.

As a result, using Dalton's law, the pressure of oxygen in dry air can be computed as follows:

Total pressure of dry air equals the pressure of nitrogen, oxygen, and any additional gases.

Total pressure of dry air = pressure of nitrogen + pressure of oxygen

Pressure of oxygen = Total pressure of dry air - pressure of nitrogen

= 101.3 kPa - 79 kPa

= 22.3 kPa

Thus, this is the pressure of oxygen in dry air.

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Environmentally responsible involves more than just avoiding plastic bags; it also means making daily decisions that, quite literally, will determine whether or not we succeed as a species.

We can slow the pace of climate change by becoming more aware of how we can reduce pollution, safeguard species, conserve natural resources, and take other steps.

Everyone can make a difference, especially when wise environmental decisions become routine and perhaps even start inspiring others to follow suit.

Even immediate personal advantages can result from acting morally in favor of the future of life on Earth. It can help you express your creativity, become more involved in your community and the wider world, and lead to a healthier living.

Therefore, Environmentally responsible involves more than just avoiding plastic bags; it also means making daily decisions that, quite literally, will determine whether or not we succeed as a species.

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Consciousness is our current awareness of ourselves and of the world around us.

Focused awareness is a state of heightened alertness we experience when completely absorbed in a task or activity.

Drifting consciousness is a state of awareness characterized by drifting thoughts or mental imagery.

Divided consciousness is a psychological state in which one's consciousness is split into distinct components, possibly during hypnosis

An altered consciousness is a change in one's normal mental state as a result of trauma or accident or induced through meditation, drugs, some foods, etc.

What is the state of consciousness?

Our level of awareness of internal events and external surroundings is known as a state of consciousness. States of consciousness can also be divided into two broad categories – normal waking consciousness and altered states of consciousness.

What are the seven states of consciousness?

The seven states of consciousness are: waking, dreaming, sleeping, transcendental consciousness, cosmic consciousness, God consciousness, and unity consciousness.

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The clock will read 5.88 hours when you land in Boston. If the speed of light were 1000mi/h when traveling in a flight from Los Angeles to Boston.

It is assumed that,

The speed of light, c, is equal to 1000 mph.

D = 2900 mi for distance

A plane's speed is 510 miles per hour.

(A) Assume that the time on your watch is and the time on the clock in the Los Angeles airport is, respectively. Using Einstein's theory of relativity, it can be calculated as follows: t= t0/1- v2/c

t= d/v and t0 = t1 - v2/c

.............(1)

t=2900 mi/510 mi/hr t=5.68 hrs

Equation (1) is transformed to: t0= 5.681-5102/1000 t0= 4.88 hours.

(b) According to a clock at the Los Angeles airport, the time was: t= 2900 miles/510 miles per hour; t= 5.68 hours.

Therefore, this is the necessary solution.

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Answer:

16.67 cm/s

Explanation:

To calculate the velocity of the ball, we need to divide the distance it travels by the time it takes to travel that distance.

velocity = distance / time

So for the ball that rolls 35 cm in 2.1 seconds, the velocity can be calculated as follows:

velocity = 35 cm / 2.1 s = 16.67 cm/s

So the velocity of the ball is 16.67 cm/s. Note that the unit of velocity is distance per time, in this case cm/s.

The function for the simple harmonic motion having the given properties. Assume that the displacement is at its maximum at time t = 0 is y = 6.45 cos(60π*t).

Moving an object back and forth along a line is known as simple harmonic motion.

See a pendulum, for instance. It follows the same path when we swing it back and forth. Oppositions are what these motions are. A simple harmonic motion example is the oscillations of a pendulum.

[tex]y=Acos(Bt)[/tex]

has amplitude |A| and period 2π/B, and reaches its maximum at t=0.

So we choose A = 6.45

Period = 1/frequency

Period = 2π/B = 1/30

2π/B = 1/30

B = 60π

y = A.cos(Bt)

y = 6.45 cos(60π*t)

Therefore, The function for the simple harmonic motion is y = 6.45 cos(60π*t).

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(a) The observed interference is destructive, as the phase difference between the waves exceeds π.

(b) The phase difference between the waves is less than π, so the observed interference is constructive.

When the observer is 1.15 m from speaker B, the path difference between the waves from the two speakers is:

Δx = x₂ - x₁ = 2.50 m - 1.15 m = 1.35 m

The corresponding phase difference is:

Δφ = 2π (Δx / λ) = 2π (1.35 m / (343 m/s / 429 Hz)) ≈ 4.16 rad

Since the two speakers are vibrating exactly out of phase, the phase difference between their waves is π, which is approximately 3.14 rad. Therefore, the observed interference is destructive, as the phase difference between the waves exceeds π.

When the observer is 2.00 m from speaker B, the path difference between the waves from the two speakers is:

Δx = x₂ - x₁ = 2.50 m - 2.00 m = 0.50 m

The corresponding phase difference is:

Δφ = 2π (Δx / λ) = 2π (0.50 m / (343 m/s / 429 Hz)) ≈ 1.55 rad

Since the phase difference between the waves is less than π, the observed interference is constructive.

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Por lo tanto, la pelota fue lanzada con una velocidad inicial de 14.7 m/s y alcanzó una altura máxima de 11.3 m.

Generally, Para resolver este problema, necesitamos conocer la relación entre la velocidad inicial con la que se lanza la pelota y la altura máxima que alcanza. Podemos usar las ecuaciones de movimiento para un objeto que se mueve verticalmente con aceleración constante.

Primero, consideremos el momento en que la pelota es lanzada. En ese momento, la velocidad inicial de la pelota es v0, que es lo que estamos buscando. Usando la ecuación de posición vertical:

y = v0t - 1/2gt^2

donde y es la altura alcanzada, t es el tiempo transcurrido, y g es la aceleración debido a la gravedad (-9.8 m/s^2), podemos despejar v0 en términos de y y t:

v0 = (y + 1/2gt^2) / t

Ahora, consideremos el momento en que la pelota es atrapada, 3.0 s después de ser lanzada. Sabemos que en ese momento, la velocidad vertical de la pelota es cero, ya que está en su punto más alto. Usando la misma ecuación de posición vertical, pero estableciendo y = 0 y v = 0, podemos encontrar el tiempo que tarda la pelota en llegar a su altura máxima:

0 = v0t - 1/2gt^2

t = 2v0/g

Sustituyendo este valor de t en la ecuación anterior, podemos encontrar la altura máxima que alcanza la pelota:

y = v0(2v0/g) - 1/2g(2v0/g)^2

y = v0^2/2g

Ahora podemos calcular los valores numéricos. Si asumimos que la altura a la que el jugador atrapa la pelota es la misma que la altura máxima alcanzada por la pelota, y tomamos g = -9.8 m/s^2, entonces:

v0 = (y + 1/2gt^2) / t = (0 + 1/2(-9.8 m/s^2)(3.0 s)^2) / 3.0 s = 14.7 m/s

y = v0^2/2g = (14.7 m/s)^2 / (2(-9.8 m/s^2)) = 11.3 m

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American ground forces did not conduct operations in North Vietnam during the Vietnam War. The US military mainly operated in South Vietnam, where they faced the Viet Cong, a guerrilla force that was supported by the North Vietnamese Army.

The guerrillas hid themselves from American forces: The Viet Cong employed guerrilla tactics such as hit-and-run attacks, ambushes, and blending in with the local population, which made it difficult for American forces to locate and engage them. They also built an extensive network of tunnels and underground bases, which allowed them to evade detection and launch surprise attacks.

The Viet Cong were more capable fighters: The Viet Cong were highly motivated and dedicated fighters who were willing to endure extreme hardship to achieve their objectives. They were also intimately familiar with the terrain, which gave them an advantage over the American forces, who were fighting in an unfamiliar environment. Additionally, the Viet Cong had the support of the local population, which allowed them to blend in and gather intelligence.

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D. Multiplying mass by velocity.

The momentum of an object is a measure of its motion and is defined as the product of its mass and velocity. It is a vector quantity, meaning it has both magnitude and direction.

The formula for momentum is given by p = mv, where p is the momentum, m is the mass of the object, and v is its velocity. So, the momentum of an object can be calculated by multiplying its mass by its velocity.

Option A is incorrect because momentum is not simply the product of mass and acceleration. Option B is incorrect because force is not directly related to momentum. Option C is incorrect because dividing mass by velocity does not give momentum, it gives the velocity of the object.

A. the magnitude of E ->  is √10.

B.  the magnitude of F -> is √10

C. the magnitude of G -> = E-> +F -> is √20

D. the magnitude of H-> =−E -> −2F ->  is √50.

The magnitude or size of a mathematical object is described as a property which determines whether the object is larger or smaller than other objects of the same kind.

A. The magnitude of the vector E -> is given by the formula:

|E -> | = √(3^2 + 1^2) = √(9 + 1) = √10

So, the magnitude of E -> is √10.

B. The magnitude of the vector F -> is given by the formula:

|F -> | = √(1^2 + (-3)^2) = √(1 + 9) = √10

So, the magnitude of F -> is √10.

C. The magnitude of the vector G -> is given by the formula:

G -> = E-> + F ->

|G -> | = √((3 + 1)^2 + (1 - 3)^2) = √(4^2 + (-2)^2) = √(16 + 4) = √20

So, the magnitude of G -> is √20.

D. The magnitude of the vector H -> is given by the formula:

H -> = -E-> - 2F->

|H -> | = √((-3 - 2 * 1)^2 + (-1 - 2 * -3)^2) = √((-5)^2 + 5^2) = √50

So, the magnitude of H -> is √50.

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The time for which the ball remains in air and finally lands back on the ground will be 1.2 m/s.

Velocity is the directional speed of an object which is in motion as an indication of the rate of change in position of the object as observed from a particular frame of reference and as measured by a particular standard of time.

Vf = Vi + at

where, Vf is the final velocity,

Vi is the initial velocity,

a is the acceleration,

t is the time taken

Since, the object lands back on the ground. The final velocity of the object will be zero.

Vf = 0 m/s

12 = 0 + (-10)t

12 = -10t

t = -12/ 10

t = -1.2 sec

Therefore, the time taken will be 1.2 seconds.

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With no magnification, the number of grains per square meter is 2.84 x 10^7.

For an ASTM grain size number of 8.8, we can use the following equations to calculate the number of grains per square meter:

N = (2^(n-1)) * 10^4 / A

where N is the number of grains per square meter, n is the ASTM grain size number, and A is the area per grain at the specified magnification.

a) At a magnification of 100:

The area per grain at 100x magnification is 1.56 * 10^-8 square meters. Substituting n = 8.8 and A = 1.56 * 10^-8 into the equation, we get:

N = (2^(8.8-1)) * 10^4 / 1.56 * 10^-8

N = 1.84 * 10^10 grains/m^2

Therefore, at 100x magnification, the number of grains per square meter is 1.84 x 10^10.

b) With no magnification:

Without magnification, the area per grain is much larger. The ASTM standard specifies an area per grain of 1 mm^2, which is 10^-6 square meters. Substituting n = 8.8 and A = 10^-6 into the equation, we get:

N = (2^(8.8-1)) * 10^4 / 10^-6

N = 2.84 * 10^07 grains/m^2

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Answer:

The electric field strength at the location of the metal ball bearing is 1.8 * 10^2 N/C.

The force due to gravity acting on a 24 lb. turkey on Saturn is approximately 1.253 N.

To calculate the force due to gravity (F) acting on the 24 lb. turkey on Saturn, we need to use the formula for the gravitational force:

F = G * M₁ * M₂ / d²

where;

First, we need to convert the mass of the turkey from pounds to kilograms:

24 lb = 10.89 kg

Next, we need to convert the distance between Saturn and the turkey from kilometers to meters:

58,232 km = 5.8232 x 10⁷ m

Now we can substitute the values into the formula:

F = 6.673 x 10^-11 Nm²/kg² * 5.683 x 10²⁴ kg * 10.89 kg / (5.8232 x 10⁷ m)²

Simplifying this expression, we get:

F = 1.253 N

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This statement is False as batteries connected as a series additive power source doesn't produce a voltage that is less than either of the batteries connected by itself.

The battery is a tool for powering electrical appliances that is made up of one or more electrochemical cells with external connections. Batteries in a specific circuit are either connected in series or parallel depending on how many there are. It is essential to comprehend the differences between series and parallel connections since they affect how batteries function in various applications. Batteries can be linked in both series and parallel configurations. A battery with this configuration is known as a series-parallel battery. Occasionally the load may need more voltage and current than a single battery cell is capable of providing. The desired number of batteries are coupled in series to produce the necessary current, and these series combinations are connected in parallel to produce the necessary load voltage.

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The probability that the selection is made of 2 oatmeal cookies are 1/6.

As per given data in the question:

Oatmeal cookies - 6

Pecan Cookies - 5

Peanut butter cookies - 1

Total cookies in the jar - 12

The probability that the selection is of 2 oatmeal cookies, it is as follows:

P (oatmeal cookies) = 2/12 = 1/6

Probability deals with the likelihood of an event or phenomena occurring and is quantified as a number between 0 and 1 inclusive, where 0 indicates an impossible chance of occurrence and 1 denotes the certain probable outcome of an event.

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Answer: 30,000 kg m/

Explanation: Therefore p=1500*20 = 30,000 kg m/s.

The coefficient of kinetic friction for the skier if the magnitude of frictional force is 25N will be 0.04638.

Kinetic friction can be defined as a force which acts between the moving surfaces. A object moving on the surface experiences a force in the opposite direction of the movement. The magnitude of the force will also depend on the coefficient of kinetic friction between the two objects.

F = μk Fn

where, F is the frictional force,

μk is the coefficient of kinetic friction,

Fn is the normal force

Fn = mass × acceleration due to gravity

Fn = 55 × 9.8

Fn = 539N

F = μk Fn

F = 25N,

25 = μk × 539

μk = 25/ 539

μk = 0.04638

Therefore, the coefficient of kinetic friction will be 0.04638.

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