describe the conditions necessary for sublimation to occur​ please help

Answer:  the hunter should aim his rifle 3,422 meters above the deer to hit it.

Explanation: We can solve this problem using projectile motion equations. Let's first identify the known variables:

Distance to the deer along the line of sight (horizontal distance): d = 10,181 m

Height of the hill: h = 90 m

Muzzle velocity of the gun: v0 = 100 m/s

Acceleration due to gravity: g = 10 m/s^2

We want to find the vertical distance (height) between the hunter's location and the deer, which we can call y. We can use the following equation for the vertical motion of a projectile:

y = v0tsin(theta) - (1/2)gt^2

where t is the time it takes for the bullet to reach the deer, and theta is the angle between the line of sight and the horizontal (the angle at which the rifle is aimed).

To find t, we can use the fact that the time of flight of a projectile is given by:

T = 2v0sin(theta)/g

We can solve for sine(theta) using the fact that the horizontal distance is related to the time of flight by:

d = v0*cos(theta)*T

Combining these equations, we get:

sin(theta) = d/(2Tv0)

cos(theta) = sqrt(1 - sin^2(theta))

t = T/2

Substituting these values back into the equation for y, we get:

y = (d*t/tan(theta)) - (1/2)gt^2

Now we just need to plug in the numbers and solve for y:

sin(theta) = 90/10,181

theta = arcsin(sin(theta)) = 0.523 degrees

cos(theta) = cos(0.523) = 0.999

T = 2100sin(theta)/g = 3.189 seconds

t = T/2 = 1.595 seconds

y = (10,181*t/tan(theta)) - (1/2)gt^2 = 3,422 meters

Therefore, the hunter should aim his rifle 3,422 meters above the deer to hit it. Note that this assumes no air resistance and that the rifle is perfectly aimed. In reality, the bullet would be affected by air resistance and the trajectory would depend on the accuracy of the rifle and the shooter's skill.

The velocity of the money at the given price, and amount of money in the time frame is 6.75.

The velocity of money is a measurement of the rate at which money is exchanged in an economy.

It is the number of times that money moves from one entity to another.

It also refers to how much a unit of currency is used in a given period of time.

MV = PY

V = PY/M

where;

Substitute the given parameters and solve for velocity;

V = (2.25 x 6000) / 2000

V = 6.75

Thus, the velocity of the money at the given price, and amount of money in the time frame is 6.75.

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The falcon take 4 × 10⁶ sec to reach moon

Given,

The distance between the earth and the moon = 384,400 km

The speed of the peregrine falcon = 350 km/hr

Time = Distance / Speed = 384,400 km / 350 km/hr = 1098.28571 hrs

1 hr = 3600 sec

So, 1098.28571 hrs = 3600 × 1098.28571 s =4 × 10⁶ sec.

Only the Moon orbits Earth naturally. The Earth-Moon satellite system is made up of it and Earth. Its diameter is roughly equal to that of Earth. It is the largest satellite of a planet relative to the planet and the sixth largest satellite in the Solar System, bigger than any known dwarf planet. According to the geophysical definitions of the term, the Moon qualifies as a satellite planet because it is a differentiated rocky entity with planetary-mass. It has no major magnetic field, atmosphere, or hydrosphere. About one-sixth of Earth's surface gravity corresponds to it. Io, a moon of Jupiter, is the only known satellite in the Solar System with a higher surface gravity and density.

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A man moves a sled across a horizontal snow surface at a steady speed. 68.6 N is the force of friction between the sled and the snow if he pulls the rope with an 80 N force at a 53 N angle above the horizontal.

The force of friction can be determined using the following equation:

= F friction

= F norm - F applied × cos(θ)

here,

"F norm" is the normal force exerted by the snow on the sled,

"F applied" is the force applied by the man,

"θ" is the angle between the applied force and the horizontal.

Since, the sled moves at constant velocity, the net force on the sled must be zero.

Hence,

The force of friction must balance the applied force:

= F friction

= F applied × cos(θ)

Adding values:-

= F friction

= 80 N × cos(53°)

= 68.6 N

Therefore, the force of friction between the sled and the snow is 68.6 N.

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Answer:

At the top of the waterfall, the water is higher in the gravitational field of the Earth and has gravitational potential energy. When it falls, the potential energy turns into kinetic energy. So energy is not created, it was there at the beginning, stored as potential energy.

Among the options given in the question, the magnetic screwdriver would not help protect equipment from electro-static discharge (ESD).

Electro-static discharge (ESD) is an electrical energy transfer between two charged surfaces. ESD is the fast release of energy between two objects at different electrical potentials. A mild form of electrostatic discharge may go unnoticed, but in severe cases, it can harm electronic equipment.

A magnetic screwdriver is a screwdriver that has a magnetized tip that aids in holding screws securely during insertion or removal. It also prevents the screws from falling off while being inserted into the hole.

In conclusion, among the options given in the question, the magnetic screwdriver would not help protect equipment from electro-static discharge (ESD).

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Answer:

c

Explanation:

Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

Frequency is defined as the number of repetitions of a wave occurring waves in 1 second. Its unit is Hz. Frequency is given by the formula as,

A moving car is targeted by radio waves sent from a radar gun by a police officer standing still.

The radio waves reflected off the vehicle and picked up by the radar gun have a greater frequency than the radio waves that were transmitted.

A stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer.

Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

Hence the higher frequency is the correct answer for blanks.

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The water flow takes 1.06 s to reach the house.

Water strikes 0.87 m above the window when the firefighter holds the hose at a \(53^o\) angle from horizontal.

The magnitude of velocity when water hits the house is 7.52 m/s.

The minimum speed for water to enter into the window is\(v_0 = d / (v_0cos(\theta)) \times\sqrt{(8.4-2dtan\theta)/g}\).

The question can be solved by applying the concept of projectile motion. When an object is projected into the air, it follows a curved path under the influence of gravity. The path followed by a projectile is called a parabolic path.

To solve this problem, we can break it down into a few parts.

First, let's find the time it takes for the water to reach the house:

We can use the horizontal distance between the firefighter and the house, which is 8 m, and the initial horizontal velocity of the water, which can be found using the initial speed and launch angle:

\(v_x = v_0 cos(53^\circ)\)

\(v_x = 12.5 \ m/s \times cos(53^\circ)\)

\(v_x = 7.5 \ m/s\)

The time it takes for the water to travel the horizontal distance of 8 m can be found using the formula:

\(time = distance/velocity\)

\(time = 8 \ m / 7.5 \ m/s\)

\(time = 1.06\ s\)

So it takes 1.06 seconds for the water to reach the house.

Next, let's find the height above the window that the water reaches:

We can use the vertical distance between the firefighter and the window, which is (6 - 1.8) m, and the initial vertical velocity of the water, which can be found using the initial speed and launch angle:

\(v_y = v_0 sin(53^\circ)\)

\(v_y = 12.5 \ m/s \times sin(53^\circ)\)

\(v_y = 9.98 \ m/s\)

The time it takes for the water to reach the house is 1.06 s, so we can use this time and the initial vertical velocity to find the height above the window that the water reaches:

\(y = v_yt - 0.5gt^2\)

\(y = 9.98 \ m/s \times 1.06 s - 0.5 \times 9.8 \ m/s^2 \times (1.06 \ s)^2\)

\(y = 5.07\ m\)

Since the firefighter is holding the fire hose 1.8 m above the ground, the total height reached by the water is

h = 1.8 + 5.07 = 6.87 m

Height above the window = 6.87 - 6 = 0.87 m

So the water reaches a height of 0.87 m above the window.

Next, let's find the magnitude of the velocity of the water when it strikes the house:

Vertical velocity of water when it stricks the house at t = 1.06 s.

\(v_{y(final)} = 9.98 - 9.81\times 1.06\)

\(v_{y(final)} = 0.588 \ m/s\) (downwards)

We can use the horizontal and vertical components of the velocity to find the total velocity using the Pythagorean theorem:

\(v = \sqrt{vx^2 + vy^2}\)

\(v = \sqrt{(7.5\ m/s)^2 + (0.588\ m/s)^2}\)

v = 7.52 m/s

So the magnitude of the velocity of the water when it strikes the house is 7.52 m/s.

Finally, let's find the minimum angle and speed of the flow in order to get water right into the window:

For the water to reach the window, its vertical displacement must be equal to the vertical distance between the firefighter and the window, which is 4.2 m. We can use this information to find the launch angle and speed using the equations of motion:

\(y = v_0 sin(\theta) t - 0.5 g t^2\)

\(4.2 m = v_0 sin(\theta) t - 0.5 g t^2\) ....(1)

\(v_x = v_0 cos(\theta)\)

\(t = d / v_x\)

\(t = {d}/{v_0 cos\theta}\) .....(2)

Substituting the second equation into the first equation and solving for \(v_0\) and θ, we get:

\(v_0 = d / (v_0cos(\theta) t)\)

\(4.2 m = (\frac{d}{(cos(\theta) t)}) \times sin(\theta) t - 0.5 g t^2\)

Solving for t and substituting into the equation for \(v_0\), we get:

\(t = \sqrt{(8.4-2dtan\theta)/g}\)

\(v_0 = d / (v_0cos(\theta) \times\sqrt{(8.4-2dtan\theta)/g)}\)

Substituting the values given in the problem (d = 8 m, \(g = 9.8 m/s^2\)), we can solve for θ and \(v_0\)

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Raul pushes a stalled car with a force of 204 N. The average power required to move the car is 157 Watt.

The average power is given by:

P = ΔF . s / Δt

Where:

P = power

ΔF = force changes over a time period Δt

s = distance

Parameters given in the problem:

ΔF = 204 - 44 = 160 N

s = 16.3 m

Δt = 16 s

Plug these parameters into the formula,

P = ΔF . s / Δt

P = 160 x 16 / 16.3

P = 157 Watt

Hence, the required power is 157 Watt.

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Answer:

Shiny objects don't absorb heat as well as dull objects. Shiny objects reflect heat or they reflect more heat then absorb it. So the heat thats being hit on a shiny object is being reflected instead of being absorbed. Dull objects are better at aborbing heat. So that makes dull objects heat up faster than shiny objects, since shiny reflects more and dull doesn't as much.

Explanation:

I hope it helps! Have a great day!

pan~

The correct answer is: Its average speed was 50 m.p.h, its displacement was 100 miles, and its average velocity was zero.

We can calculate the car's average speed by using the formula:

average speed = total distance traveled / total time taken

The total distance traveled is the difference between the final and initial odometer readings:

total distance traveled = 123 miles - 23 miles = 100 miles

The total time taken is 2 hours.

average speed = 100 miles / 2 hours = 50 m.p.h.

Since the car returned to its starting point, its displacement is zero. Displacement is a vector quantity that refers to the change in position of an object from its initial position to its final position. In this case, the car ended up at the same position as it started, so its displacement is zero.

Average velocity is defined as displacement divided by the total time taken. Since the displacement is zero, the average velocity is also zero, regardless of the car's speed during the trip.

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The  Newton's second law and kinematics we find the answer is:

Kinematics studies the movement of the body, which is a vector magnitude for which stone in a horizontal circular motion must be subjected to an acceleration that changes the direction of the speed even when its magnitude is constant, this acceleration is called centripetal.

              a = v / r²

Where a is the acceleration, v the speed anf r the radius of circle

Newton's second law states that force is proportional to the mass of the body and its acceleration

             F = m a

Where the bold indicate vectors, F is the force , m tha mass and a the acceleration.

Using these two expressions we see that the stone is subjected to a force directed towards the center of the circle. When this force becomes zero (breaks the rope) there is nothing to change the direction of the velocity at the point of rupture and the stone must follow with this velocity tangential to the point of rupture of the rope.

This is expressed in Newton's first law, which says:

In conclusion, we use the  Newton's second law and kinematics when the rope breaks the body is nine with constant velocity and with a direction tangential to the trajectory at the point.

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Answer:

Velocity = distance / time

V = 10/1

V = 10km/h

Answer:10km/h or 2.77m/s.

Explanation:

Distance =10km

Time =1h

Velocity =10/1 =10km/h

Or,

Distance =10km =10000m

Time =1h =60min = 3600s

Velocity =10000/3600 =2.77m/s

By applying the second equation of motion, the speed at which he threw the second stone is equal to 12.10 m/s.

First of all, we would calculate the time taken by the first stone to reach a height of 49 meters by applying the second equation of motion as follows:

S = ut + ½gt²

49 = 0(t) + ½ × 9.8 × t²

49 = 4.9t²

t² = 49/4.9

t = √10

t = 3.16 seconds.

Now, we can determine the speed at which he threw the second stone:

Note: Time = 3.16 - 1 = 2.16 seconds.

S = ut + ½gt²

49 = u(2.16) + ½ × 9.8 × 2.16²

49 = 2.16u + 22.86

2.16u = 49 - 22.86

u = 26.14/2.16

u = 12.10 m/s.

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The result is 30 feet after multiplying 1.25 feet by 24 minutes.by the ant.

the length or width between two objects, points, lines, etc. remoteness is the state or fact of something or someone being physically distant from another. a straight line in space It would take too long to walk seven miles in one hour. x feet times 10 feet

8 minutes, 24 minutes

Cross multiplying results in (10 * 24 = 8x), which leads to 240 = 8x.

30 = x, hence the ant will move 30 feet in 24 minutes.

Flow rate:

1-foot Equals 1.25 feet, 8 minutes, and 1 second

The result is 30 feet after multiplying 1.25 feet by 24 minutes.

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Answer: D. Annular Solar Eclipse

Explanation:

An annular solar eclipse happens when the Moon passes between the Sun and Earth, but when it is at or near its farthest point from Earth. Because the Moon is farther away from Earth, it appears smaller than the Sun and does not completely cover the Sun.

If you are backing up but slowing down, your acceleration is directed backwards. Acceleration is a vector quantity that refers to the rate of change of velocity with respect to time. When you are backing up, your velocity is directed in the opposite direction of your acceleration.

Therefore, if you are slowing down while backing up, it means that your acceleration is directed in the opposite direction of your motion, which is backwards.

Acceleration can also be negative or positive depending on the direction of motion and the direction of the force applied. In this case, since you are slowing down, your acceleration is negative, and it is directed opposite to the direction of motion, which is backwards.

It is essential to understand the direction of acceleration to properly control the motion of an object. Understanding acceleration is particularly crucial in driving, as it allows drivers to adjust their speed and direction according to the changing road conditions and traffic.

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The Coriolis effect, option C is the correct answer.

The Coriolis effect is a natural phenomenon that occurs when the earth's rotation speed differs at different latitudes. The equator with respect to the rotation speed of the earth at the two hemispheres. This effect makes the moving object appear to the right in the northern hemisphere and to the left in the southern hemisphere.

The Coriolis effect makes the ocean current rotate clockwise in the northern hemisphere and in the anticlockwise direction in the southern hemisphere.

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Jordan's take-off speed is 4.9 ms.

Key Accomplishments Too many to list. See the link below. Bottom line Jordan's incredible 4-foot vertical jump puts the top of his head 6 inches above the edge and the soles of his feet higher than any of his other NBA cleats. rice field. I also ran 4.3 Forty. Don't let anyone tell you that someone was a better athlete than you are. MJ was not only a great goalscorer back then, but he was also a high-flying dunker.

He has only one player in NBA history called his Airness and that is Michael He Jordan. He currently owns his NBA vertical jump of 48 inches, the highest in the entire tournament. That number comes with a hang time on the edge of 0.92 seconds. The 30th-40th percentile is 15-16 inches. Above-average vertical jump, values ​​are in the 60th and 70th percentiles and range from 18 to 19 inches. A good rating is 20-21 inches, which corresponds to the 80-90th percentile.

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Answer:

decrease

Explanation:

because it’s going to 180 meaning it’s becoming equal to the other and they cancel out

The distance of the motorboat relative to the home, which travels in various directions, is 3.07 km.

Relative velocity is a velocity of an object which is in respect to another observer, or it is a ratio of change in the position of a point to time with respect to another observer.

Given: Travel in East direction (\(d_{E}\))= 5 km,

velocity in N35E(v) = 2 m / s, time taken(t)  = 90 min = 5400 seconds,
Displacement in south (\(D_S}\)) = 6.5 km

Firstly, find the displacement  in N35E so

Displacement   = Velocity × time,

\(d_{NE}\) = 2 × 5400 = 10800 meters or 10.8 km

Now by using Pythagoras' theorem
We can calculate the return displacement in the south direction(\(d_{S}\)),

\(d_{S}\) = \(\sqrt{d^{2} _{NE}- d^{2} _{E } }\)
\(d_{S}\) = \(\sqrt{10.8^{2}-5^{2} }\)

\(d_{S}\) = 9.57 km

Therefore, the distance of the boat from the home (D) = \(d_S}\) - \(D_S}\)

D = 9.57 - 6.5;

D = 3.07 Km

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The acceleration of both the box will indeed be 0.8 m/s² when the friction factor is 0.12.

Acceleration is the pace at which the speed and direction of a moving object change over time. Something is said to be accelerating when it commences to move quickly or slowly. Even if the voltage is constant, transportation on a circle accelerates because the angle is always shifting.

According to the given statement we have frictional force f = µ •N

where N = normal force = mg

the given Sliding friction µ= 0.12

therefore f = 0.12 × 50 × 10 = 60 N

hence net friction = applied friction - frictional force = 100 - 60 = 40 N

also we know that Force F= ma

therefore we have acceleration formula ,

acceleration = force/mass = 40 / 50 = 0.8 m/ s²

hence the acceleration of the box is 0.8 m/s².

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Centripetal acceleration is the acceleration experienced by an object traveling along a curved path, while radial acceleration is the rate at which an object's velocity changes as it moves in a circle. The acceleration of the car is 10 m/s2.

During a NASCAR race a car goes 50 m/s around a cured section of track that has a radius of 250 m. The acceleration of the car can be found using the formula of centripetal acceleration or radial acceleration. Centripetal acceleration refers to the acceleration experienced by an object traveling along a curved path. When an object travels along a curved path, the velocity of the object changes as it moves in a circle. Centripetal acceleration is the rate at which an object’s velocity changes as it moves in a circle. The formula for centripetal acceleration is given as :a c = v²/r where ac = centripetal acceleration, v = velocity of the object, and r = radius of the circle. Now, let's plug in the values: ac = (50 m/s)²/250 mac = 2500/250 acac = 10 m/s²Therefore, the acceleration of the car is 10 m/s².

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In summary, the amount of time a low mass star will stay on the main sequence is determined by its mass, radius, and temperature. Typically, a low mass star will remain on the main sequence for billions of years.

A low mass star is a star that is small in size, mass, and brightness. It is typically around 0.5-2 solar masses and is relatively cool compared to other types of stars. On the main sequence, which is the period when the star is fusing hydrogen into helium in its core, a low mass star can remain for a very long time. The length of time that a low mass star remains on the main sequence is determined by the rate at which it fuses hydrogen into helium in its core. This rate is determined by the star's mass, radius, and temperature. Generally, the lower the mass of the star, the longer it will remain on the main sequence. For example, a star with a mass of 0.5 solar masses will remain on the main sequence for around 20-30 billion years, while a star with a mass of 1 solar mass will remain on the main sequence for around 10 billion years.

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It moves at a constant linear speed around it. Yet, the linear velocity at any point on the blades is constantly varying and accelerating.

Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.

Most likely, you picture something racing up when you think about acceleration. But a moving thing accelerates as it slows down. A change in speed is what acceleration is, so keep that in mind. The speed of a car that is slowing down decreases.

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Answer:

option a

Explanation:

a- All matter is composed of small particles.

Explanation:

The following are the basic assumptions of the Kinetic Molecular Theory: The volume occupied by the individual particles of a gas is negligible compared to the volume of the gas itself. ... Gas particles are in a constant state of random motion and move in straight lines until they collide with another body.

Answer:

1.b 2.d 3.b 4.a 5.c

Explanation:

I tried my very best and I hoped these helped

Answer:

1. B

2.D

3.C

4.B

5.D

Explanation:

i'm not sure if these are correct but hope this helps

Answer: Periods

Explanation: The rows are called Periods

The columns are Groups

Periodic table