A 10 kg firework is shot in the air at 75 m/s. What is the momentum of the firework?

The distance moved by the car is 2100 meters.

To find the distance moved by a car that travels at a speed of 70m/s for 30 seconds, we can use the formula:

distance = speed x time

Substituting the given values into the formula, we get:

distance = 70m/s x 30s

distance = 2100m

Therefore, the distance moved by the car is 2100 meters.

It's important to note that this calculation assumes that the car is traveling at a constant speed of 70m/s for the entire 30 seconds. In reality, the car may have accelerated or decelerated during the journey, and the speed could have been variable. Additionally, external factors such as traffic or road conditions could have impacted the distance traveled by the car.

Nevertheless, the formula distance = speed x time is a useful tool for calculating the distance traveled by an object moving at a constant speed for a specific period of time. By multiplying the speed by the time, we can determine the total distance covered by the object during that time.

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Answer:

At point A, the comet has the least kinetic energy because the comet is resting. 3. From point B to point D its orbit's potential energy is decreasing and its kinetic energy is increasing meaning it's moving more and more

Coastal engineering projects involve the design and construction of structures to manage and protect coastal areas from erosion, floods, and other natural hazards.

In a wave approaching perpendicular to a 500 m long breakwater, the height of the wave on the backside at a distance of 250 m from one of the ends can be estimated using wave transformation principles.

However, the height of the wave at a distance of 60 m from one of the edges along a 60-degree angle with the breakwater requires additional information, such as wave direction and wave transformation equations, to provide an accurate estimate.

For a wave in water that is 15 m deep with a period of 11 s and a height of 1.4 m, the water particle velocity and pressure at a point 0 m ahead of the wave crest and 2 m below the still water level can be calculated using wave theory equations. The horizontal and vertical displacement of the water particle orbit at this point can also be determined using the properties of wave motion and particle orbits.

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If all these resistors were light bulbs, 22Ω resistor is greatest, it would be the brightest bulb.

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Concerns related to the skeletal system can have several implications for a manned space mission to Mars. Here are a few key concerns:

1. Bone Loss: During long-duration space missions, astronauts experience significant bone loss due to the reduced gravitational forces. In microgravity environments, such as space travel, the lack of mechanical loading on the bones leads to decreased bone density and strength. This condition is known as space-induced osteoporosis. Prolonged exposure to microgravity can result in increased fracture risk, skeletal fragility, and muscle atrophy.

2. Muscle Atrophy: In addition to bone loss, prolonged periods in microgravity can cause muscle atrophy and weakness. The lack of resistance and gravitational loading in space reduces the need for muscle strength, resulting in muscle deterioration. Weak muscles can further contribute to skeletal problems, as they are essential for supporting and maintaining bone health.

3. Space Radiation: Astronauts are exposed to higher levels of space radiation beyond Earth's protective atmosphere. Prolonged exposure to radiation can have detrimental effects on the skeletal system, including DNA damage, increased risk of cancer, and potential bone marrow suppression.

4. Rehabilitation Challenges: Addressing skeletal concerns during a mission to Mars would require effective rehabilitation strategies. However, providing appropriate rehabilitation facilities and equipment in a confined space environment like a spacecraft presents logistical challenges.

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Whenever the brakes are applied fully, a vehicle going at 50 mph experiences a steady deceleration rate 42 ft/s2, covering 64.05 feet before coming to a halt.

Use the formula d = st, or length equals speed times time, to find the distance. Since both represent a certain amount of distance per unit of time, such as miles an hour or kilometers an hour, rate and speed are comparable.

Initial speed is u=50 mi/h=50×1.467=73.35ft/s.

Vehicle deceleration is, a=-42ft/s²

Use of both the second kinematics equation for motion is as follows:

v²=u²+2as

Here, s denotes the traveled distance, while v is the ultimate speed. Since the automobile eventually stops, v = 0.

0²=73.35²+2(-42)×s

84=73.35²

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Answer:

180.45m

Explanation:

Given that

mass m= 0.65kg

let H be height of building

angle of projection =40°

initial velocity  v up = 10.5 sin 40 = 6.75 m/s

horizontal velocity u= 10.5 cos 40 = 8.04 m/s

horizontal distance x = 19.6

x=ut

x= u t =

x= 8.04 t

t=19.6/8.04  = 2.44 seconds

applying the formula

h = H + Vt -1/2gt^2

0 = H + 6.75 * 2.44 - 4.9 * 2.44^2

solving for H we have

0=H + 6.75 * 2.44 - 4.9 * 5.9536

0=H + 6.75 * 2.44 - 29.17264

0=H + 6.75 *-26.73264

0=H -180.44532

H=180.45m

The efficiency of the engine if it operates in an idealized Otto cycle is 68.4%.

The efficiency of the engine if it operates in an idealized Otto cycle is 56.0%.

The compression ratio of the engine, r = 8.00The specific heat ratio of the gas used, γ = 1.40

The efficiency of the engine is given by the formula:

efficiency = 1 - (1 / r)^(γ - 1)

For the given values, the efficiency can be calculated as:

efficiency = 1 - (1 / 8.00)^(1.40 - 1)

                 = 1 - (1 / 8.00)^0.40

                 = 1 - 0.316

                 = 0.684

Therefore, the efficiency of the engine if it operates in an idealized Otto cycle is 68.4%.

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Answer:

insulator

Explanation:

it keeps heat in not moves it

When NaOH is added to water, it separates into Na+ and OH-. The hydroxyls make it more basic.

A basic solution is an aqueous solution containing more OH⁻ ions than H⁺ ions.

When NaOH as a solute is mixed into the solvent like water, it separates NaOH into Na+ and OH-. The sodium ions Na⁺ have little effect on the solution, but the hydroxyls OH⁻ ions makes the solution more basic.

Thus, NaOH form a basic solution by the presence of OH⁻ ions  into it.

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Answer:

Because the energy is waning

Explanation: hope this helps

Answer:

what does it mean for a plate to subduct?

Explanation:

Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the heavier plate dives beneath the second plate and sinks into the mantle.

Any functional group that contributes negative charge must have a lone pair of electrons.

The term functional group refers to an atom, group of atoms or a bond that is responsible for the chemical reactivity of the homologous series. A homologous series is any family of compounds.

The question is incomplete. However, any functional group that contributes negative charge must have a lone pair of electrons like amines.

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(a) A = B × r is a vector potential for B, where r = {x, y, 0}.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

(a) To verify that A = B × r is a vector potential for B, we need to show that ∇ × A = B.

Using the cross product property, we have ∇ × A = ∇ × (B × r). Applying the vector identity (A × B) × C = B(A · C) - C(A · B), we get ∇ × (B × r) = B(∇ · r) - r(∇ · B).

Since ∇ · r = 0 (as r = {x, y, 0}), and ∇ · B = 0 (as B has a constant magnitude in the z-direction), we find that ∇ × A = B, verifying A = B × r as the vector potential for B.

(b) The flux through a surface S can be calculated as Φ = ∫B·dA, where B is the magnetic field and dA is an infinitesimal area vector perpendicular to the surface.

Given that B has a constant strength b teslas in the z-direction, the flux through surface S will be Φ = ∫B·dA = ∫(0, 0, b) · (dxdy) = b∫dxdy = bA, where A is the area of the surface S.

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Answer:

B. contains substance s that are not mixed in a specific ratio

Explanation:

the proportion of constituents in a mixture can vary

On a separate planet from Earth, your mass would be the same but your weight would be different due to the gravitational pull of the planet.

W = m g

W= Weight

m = Mass

g stands for gravitational acceleration.

The amount of substance in a body is measured by its mass. It is independent of all outside variables. Hence, no outside influences have an impact on its worth.

W ∝ g

As you can see, weight varies according to the force of gravity pushing on the body. A force of gravity is another name for weight. On earth, g has a different value than it does on other planets.

Gravity is a fundamental force of nature that exists between any two objects with mass or energy. It is responsible for the attraction between objects, such as planets, stars, and galaxies, and plays a crucial role in the structure and dynamics of the universe. According to the theory of general relativity, gravity is the curvature of spacetime caused by the presence of mass and energy. This means that objects with mass or energy create a distortion in spacetime that causes other objects to be attracted toward them. The strength of the gravitational force depends on the mass and distance between the objects, with larger masses and shorter distances resulting in stronger gravitational attraction.

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Yes there are

Explanation:

Both kind of charges exist. (e≈1.60 x 10^-19 C)

Charge is the intrinsic property of a body, that allows it to have either of two kinds of itself.

Positive elementary charge is

\({x}^{1 +} \)

And negative is

\( {x}^{1 -} \)

There are two types of electric charges in nature, they are positive and negative charges.

What is meant by charge ?

Charge is defined as the intrinsic property of matter, by which it experiences a force, when placed in an electromagnetic field.

Here,

In nature, there are two type of electric charges. They are positive charge and negative charge.

The two charges exists in the nature, because, the positive charge attracts the negative charge.

The earth is actually neutral in nature. If a positive charged body is connected to the earth, the positive charge will be drained to the ground. This can be clearly described that, when the surface of earth becomes positively charged, there occurs a potential difference between the surface and the ground.

As a result, the electrons flows from the ground to the surface. The negative charge and positive charges cancels each other and thus neutralizing the surface.

The same happens when a negative charged body is connected to the surface of earth, the charge will be neutralized by the positive charge.

Hence,

There are two types of electric charges in nature, they are positive and negative charges.

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The 2 meters refers to the wavelength of the radio signals.

In ham radio, the 2-meter wavelength band refers to the portion of the radio spectrum that has a wavelength of approximately 2 meters (roughly 144-148 MHz). This is a popular frequency range for amateur radio operators, as it allows for both local and long-distance communication, depending on the specific mode and equipment used.

The 2-meter band is part of the VHF (Very High Frequency) spectrum, which has various applications such as FM radio, television broadcasts, and amateur radio. Ham radio operators use the 2-meter band for different modes of communication, including voice, digital, and Morse code. The 2-meter wavelength enables them to establish a connection with other radio operators locally, regionally, or even internationally via satellite or other propagation methods, such as tropospheric ducting or sporadic E propagation.

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Answer: B. Yes; a false hypothesis gives a scientist new information to use.

Explanation:

      Let us take a look and break down all the question's answer options.

✗ A.

Yes; now he knows that the exact opposite of his hypothesis must be true.

➜ This is not the case. He must look at this data and decide what is true.

✓B.

Yes; a false hypothesis gives a scientist new information to use.

➜ Yes! We learn from our research and looking back at our hypothesis.

✗ C.

No; a false hypothesis makes a scientist look silly.

➜ This isn't true. You cannot expect to be right all the time, and scientists make incorrect hypotheses frequently.

✗ D.

No; false hypotheses are a waste of time.

➜ Tying back into B and C, this isn't true. We learn from comparing our hypotheses with our data.

The drawing shows the couple acting on a tire wrench is missing and so i have attached it.

We are to find an expression for the torque when the axis is perpendicular to the tire and passes through the points A, B & C

Answer:

Point A: τ = Fl

Point B: τ = 0

Point C: - Fl

Explanation:

Formula for torque is;

τ = F × d

Where;

F is perpendicular force

d is distance.

Thus;

> At point A, it means we are taking torque about point A and so we have;

τ = (-F × 0) + (F × L)

τ = Fl

> At point B, it means we are taking torque about point B and so we have;

τ = (-F × L/2) + (F × L/2)

τ = -(FL/2) + (FL/2)

τ = 0

> At point C, it means we are taking torque about point C and so we have;

τ = (-F × L) + (F × 0)

τ = -FL

Answer:

A. White light is the absence of all color.

Explanation:

It is false that white light is the absence of all color. In fact, white light is the presence of all colors in the spectrum.

Electromagnetic waves are waves that do not require any material medium for propagation. It is the interaction of electric and magnetic fields.

A Chromebook is accelerated out a widow at 8m/s². The amount of  force was needed for this acceleration is (F)=10.88 N

When a object start with a velocity and end with other velocity, The difference of velocity divided by given time is called the acceleration. This is a vector quantity.

To calculate the force we are using the formula here is,

F=ma

Here we are given,

m= The mass of the Chromebook we know = 1.36 kg.

a = The acceleration of the object = 8 m/s².

We have to calculate the value of force = F

Now we put the values in the equation we get,

F=ma

Or, F = 1.36*8

Or, F=10.88N

From the above calculation we can say that, The amount of  force was needed for this acceleration is (F)=10.88 N

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Answer: The amount of force needed for the acceleration is F=10.88N

Explanation:

acceleration is the rate of change of velocity over time, both in terms of speed and direction. It is a vector quantity.

A mass-containing object's change in velocity is referred to as a force when a push or pull is applied to it. A body can change its state of rest or motion when an external force acts on it. It is directed and has a magnitude.

using formula, F=ma

where, F=force ; m=mass ; a= acceleration

given quantities are:

known mass(m) of Chromebook= 1.36kg

acceleration (a)= 8m/s²

on putting the values in the formula we get,

F=ma

F=1.36*8

F=10.88N

therefore amount of force needed for this acceleration of 8m/s² is 10.88N

It defines the direction in which the body or item is moving. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.

Speed is the rate of movement of an object along a path in time.

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Answer:

50% of source A, and 25% of source B.

Explanation:

You see, half-life of 10mil years means half of it will be gone in 10 million years. so basically, since source a is 10mil half life, half of it will remain, while source b, since it has 5 million years of half life, will have 25% left, since 1/2*1/2=1/4. hope this helps!

Answer:

source A 50%

source B 25%

Explanation:

Half life is time it takes for something to get reduced by half. For example, if half life of my weight is 5 years and I am currently 20lbs, then in next 5 years I will become half of my original so 10lbs.

Similarly, if compound A has half-life of 10 million years, then after 10 million years, half of compound A will remain, thus 50% remains

Compound b has half life of 5 million years, so first 5 million years it will reduce by half so become 50% but then in another 5 million years (total of 10 million years) it gets reduced by another half so 50/2 = 25% remains.

The initial motion of the empty soda can on the frozen pond was caused by the transfer of kinetic energy from the stone to the can, and the subsequent motion was governed by the conservation of energy principle

The initial motion of the empty soda can on the frozen pond was caused by the transfer of kinetic energy from the stone to the can. When the child threw the stone at the can, the stone imparted energy to the can, causing it to start moving.

As the can slid across the ice, it experienced frictional forces that converted some of its kinetic energy into thermal energy, decreasing its speed. This process continued until the can hit the pile of snow at the edge of the pond.

Overall, the motion of the can was governed by the conservation of energy principle, which states that energy cannot be created or destroyed but can only be converted from one form to another. In this case, the kinetic energy of the can was transferred to thermal, sound, and deformation energy.

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Answer: I think a

Explanation:

Answer: Force = 870 N  

Explanation:

acceleration = a = (final velocity - initial velocity) / time elapsed

a = (0-30)/.005 = -6000 m/s2 (negative sign means the ball is slowing down)

Force = F = mass x acceleration = ma

F = (0.145 kg)(6000 m/s2) = 870 N away from the player throwing the ball

The magnitude of the force on the player catching the ball is equal, 870N.  The mitt acts on the ball with an equal and opposite force (Newton's 3rd Law of Motion)

According to   equations of motion, we get after 8.70 seconds  she running directly east.

These are the three equations:

Given :

v₀ = 2.38 m/s

v = 0 m/s

a = 0.310 sin (-62.0°) m/s²

to find time t :

v = at + v₀

0 m/s = (0.310 sin (-62.0°) m/s²) t + (2.38 m/s)

t = 8.70 s

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