Bernoulli's principle can be used to explain the motion of cars on the highway as the cars moving fast create areas of low pressure around them, causing them to be pushed together by the higher pressure.
What is Bernoulli's principle?Bernoulli's principle can be formulated by Daniel Bernoulli. The principle states that as the speed of a moving fluid increases such as liquid or gas, the pressure within the fluid decreases through it. Although, Bernoulli deduced this law, it was Leonhard Euler who derived the Bernoulli's equation in its usual form in the year 1752.
When the two cars passes one another in opposite directions on the highway, then they tend to be forced together. Use the Bernoulli's principle to explain why this happens with the cars. The cars moving fast on the highway create areas of low pressure around them, causing them to be pushed together by the higher pressure.
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1.7
Which ONE of the vector diagrams below will result in the largest resultant
vector?
(2)
Vector diagram B will result in the largest resultant vector. Correct option is B.
What is Vector ?Vector is a mathematical quantity which has both magnitude as well as direction. Force, displacement, velocity & acceleration etc. are the examples of vectors. Vectors are denoted by a standard letter and an arrow upon it.
The resultant(R) of two vectors R1 and R2 having angle θ between them are given by,
R² = R₁² + R₂² + 2R₁R₂cosθ
A) in this diagram single vector is there,
so R = R₁
B) in this diagram two vectors are in same direction with zero angle between them. (Cos0 = 1)
R² = R₁² + R₂² + 2R₁R₂
C) & D) In these diagrams two vectors are in opposite direction with zero angle between them. (Cos180 = -1)
R² = R₁² + R₂² - 2R₁R₂
Looking at B Two vectors will be added each other and give largest resultant vector.
Hence Option B is correct.
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Which object reflects light with the longest wavelength?
a yellow book
a violet flower
a blue paper
a green leaf
Answer:
a yellow book
Explanation:
red has the longest wavelength so most wavelength to least wavelength goes in the order- red, orange, yellow, green, blue, indigo, violet
yellow has the longest wavelength in the gvn options thus its the answer
A crane must exert a force of 25000 N to lift a whale shark, the largest fish in the world, into a tank. If the shark’s acceleration equals 1.25 m/s2, what is the shark’s mass?
The force required to lift the whale shark is given as 25000 N, and its acceleration is 1.25 m/s^2. We can use Newton's second law of motion, which states that the force (F) applied on an object is equal to the product of its mass (m) and acceleration (a), i.e. F = ma.
Rearranging the equation to solve for the mass, we get:
m = F/a
Substituting the given values, we get:
m = 25000 N / 1.25 m/s^2
m = 20000 kg
Therefore, the mass of the whale shark is approximately 20,000 kg.
How does changing the charge’s value influence the force between the two charges?
As the value of charge 1 __________, the value of the force ___________.
decreases; decreases
increases; decreases
increases; does not change
decreases; does not change
Answer:
the answer is decreases,decreases
when is an atom said to be electrically neutral
An atom is said to be electrically neutral when the number of protons and the number of electrons is equal.
Protons are positively charged particles and electrons are negatively charged particles. If atom losses or gains one more electron then it is said to become an ion. Atoms may gain or lose electrons to increase their stability. A neutral atom has no charge. The positive and negative charges cancel out each out and create a balance. Basically for an atom to be electrically neutral it must have exactly one electron for every proton. Protons are present in the nucleus of an atom and electrons revolve around the center of the nucleus.
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An 8 GHz uniform plane wave travelling in air is represented by a magnetic field vector given in phasor form as follows H(y) = x 0. 015e^-j beta y + z 0. 03e^j(pi - beta y) mA - m^-1 Find beta and frequency. Find the corresponding electric field vector in phasor-form. Find the total time average power density carried by this wire
An 8 GHz uniform plane wave travelling in air is represented by a magnetic field vector given in phasor form as follows H(y) = x 0. 015e^-j beta y + z 0. 03e^j(pi - beta y) mA - m^-1 . The total time-averaged power transferred to each eardrum in 1.0 second is 3.972x10^-7 J.
The magnetic field vector for the uniform plane wave can be represented as:
H(y) = x0.015e^(-jβy) + z0.03e^(j(π-βy)) mA/m
where β is the propagation constant, and has units of rad/m.
The wave frequency can be determined from the wavelength λ, which can be calculated using the propagation constant:
λ = 2π/β
The frequency can then be determined using the relation:
f = c/λ
where c is the speed of light in air, which is approximately 3x10^8 m/s.
To find β, we can equate the phase of the x-component of H(y) to the phase of the z-component of H(y):
-jβy = j(π - βy)
Solving for β, we get:
β = π/(2y)
Substituting y = 1/(2β), we get:
β = πy
Substituting this value of β in the expression for H(y), we get:
H(y) = x0.015e^(-jπy) + z0.03e^(jπy) mA/m
To find the electric field vector, we can use the relation:
E(y) = Z0H(y)
where Z0 is the impedance of free space, which has a value of approximately 377 Ω.
Substituting the values of H(y) and Z0, we get:
E(y) = x5.655e^(-jπy) + z11.31e^(jπy) mV/m
The time-averaged power density carried by the wave can be calculated using the relation:
P = 1/2Re(E(y) x H*(y))
where H*(y) is the complex conjugate of H(y).
Substituting the values of E(y) and H(y), we get:
P = 1/2(0.015)(5.655)(cos(πy) + jsin(πy)) + 1/2(0.03)(11.31)(cos(πy) - jsin(πy))
Simplifying, we get:
P = 0.236cos(πy) W/m^2
To find the total time-averaged power transferred to a surface of area A, we can integrate P over the surface:
P_total = ∫∫ P dA
Assuming the surface is perpendicular to the direction of propagation, and has a diameter of 8.4 mm, we get:
A = π(0.0042)^2 = 5.538x10^-5 m^2
Substituting the value of A and integrating P over the surface, we get:
P_total = 0.236∫∫ cos(πy) dA
P_total = 0.236cos(πy)∫∫ dA
P_total = 0.236cos(πy)(5.538x10^-5)
Substituting the value of y = 30 m, we get:
P_total = 0.236cos(πx30)(5.538x10^-5) = 3.972x10^-7 W
Therefore, the total time-averaged power transferred to each eardrum in 1.0 second is 3.972x10^-7 J.
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019 (part 1 of 3) 10.0 points
An open vertical tube has water in it. A
tuning fork vibrates over its mouth. As the
water level is lowered in the tube, the sixth
resonance is heard when the water level is
30.25 cm below the top of the tube.
What is the wavelength of the sound wave?
The speed of sound in air is 343 m/s.
Answer in units of cm.
020 (part 2 of 3) 10.0 points
What is the frequency of the sound wave; i.e.,
the tuning fork?
Answer in units of s−1
.
021 (part 3 of 3) 10.0 points
The water continues to leak out the bottom
of the tube.
When the tube next resonates with the tuning fork, what is the length of the air column?
Answer in units of cm.
1) The wavelength of the sound wave is 11cm.
2) The frequency of the sound wave is 3118.18.
3) The length of the air column is 35.75cm.
What is frequency and its unit?
The quantity of full oscillations made by any wave element in a unit of time is known as the frequency of a sinusoidal wave. A parameter that describes the rate of oscillation and vibration is called frequency. Hertz is the SI unit for frequency. One full oscillation per second corresponds to one hertz (Hz).
Therefore, The wavelength of the sound wave is 11cm, The frequency of the sound wave is 3118.18 and The length of the air column is 35.75c
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کے
How did the start of farming/agriculture by humans impact populations in
ancient history?
Farming or agriculture by humans had great impact on the population in certain areas. Farming created a facile environment for people get into a developing life and the areas feasible for cultivation were populated more.
What were the impacts of farming in population in ancient history ?Human populations have frequently rebuilt their subsistence niches, altering both their food sources and living environments. For instance, most human populations changed from foraging to engaging in various forms of agriculture over the past 12,000 years.
It is well known that the transition to agriculture had an impact on a number of areas of human biology and demography, including mortality risk, population growth, adult body size, and physical indicators of health.
The reasons why populations tended to grow in size at times when indices of health declined are poorly understood since these tendencies have not been included in a comprehensive conceptual framework. All these are significant changes after the generation of an agricultural society.
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A constant force is applied to an object, causing the object to accelerate at 6. 00 m/s2. What will the acceleration be if
The rate of acceleration if force is doubled is same, if the objects mass is doubled it is halved, if both the object mass and force are doubled the acceleration will be same , d- acceleration will be quadrupled
Newton's second law of motion states that force is equal to mass multiplied by acceleration: F = m * a, where F is the applied force, m is the object's mass, and an is the acceleration produced.
a- When the force is doubled, the acceleration doubles as well. Using the formula, we get:
F' = 2F
a' = F' / m = (2F) / m = 2F / (2m) = F / m = a
B- If the mass is doubled, the acceleration will be halved. Using the equation, we get:
m' = 2m
a' = F / m' = F / (2m) = a / 2
C- If both the force and the mass are doubled, the acceleration will remain the same. Using the equation, we get:
F' = 2F
m' = 2m
a' = F' / m' = (2F) / (2m) = F / m = a
D- If the force is doubled and the mass is halved, the acceleration will be quadrupled. Using the equation, we get:
F' = 2F
m' = m / 2
a' = F' / m' = (2F) / (m/2) = 4F / m = 4a
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The complete question is:
When a constant force is applied to an object, it accelerates at 6.0 m/s2. What will be the rate of acceleration if
the force doubled?
the object's mass doubled?
Both the force and the mass of the object are doubled?
The force is doubled, but the object's mass is cut in half?
A lorry of mass 8 000 kg travelling at 20 m s¹ collides with a car of mass 1 000 kg that parked at the side of the road. After the collision, the lorry and the car move together. Calculate the velocity after the collision.
Answer:
Explanation:
Before the collision, the lorry has a momentum of:
p1 = m1v1 = 8000 kg * 20 m/s = 160000 kgm/s
where m1 is the mass of the lorry and v1 is its velocity.
The car is initially at rest, so its momentum is:
p2 = m2*v2 = 0
where m2 is the mass of the car and v2 is its velocity.
After the collision, the two vehicles move together with a common velocity v. The total momentum of the system after the collision is:
p = (m1 + m2)*v
where m1 + m2 is the total mass of the system.
By the law of conservation of momentum, the total momentum before and after the collision is the same. So we have:
p1 + p2 = p
Substituting the values we have:
160000 kg*m/s + 0 = (8000 kg + 1000 kg)*v
Simplifying:
v = (160000 kg*m/s) / (9000 kg)
v = 17.78 m/s
Therefore, the velocity of the lorry and car together after the collision is 17.78 m/s.
descibe the movement of the particles at the boiling point of a substance, what is happening with temperature and energy
Can someone help please
Describe how government helps business provide the goods and services that people need and want
Governments assist in enhancing the infrastructure necessary for companies to flourish and helps business provide the goods and services that people need and want.
What is economics?
Economics is the study of how limited resources are used to create outputs, such as commodities and services, that are then distributed among individuals. Resources serve as the resources for creating outputs. Products and services are created by combining resources. The necessary raw ingredients are provided by land and natural resources. Raw materials are turned into finished products and services by labor.
Businesses perform better when they can effectively transport raw materials to factories and deliver finished goods to plants and markets. Governments assist in enhancing the infrastructure necessary for companies to flourish. Roads, bridges, rail lines, airports, seaports, energy transmission lines, and telecommunications networks are all included in this.
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Why do scientists today think that the modern model of the solar system is better than Ptolemy's model? (please help)
Answer:
its because the modern model of our solar system is much more updated to the Ptolemy's model
a measuring cylinder has a depth of 4.2cm when filled with a liquid.A coin dropped inside it appears to be at a depth of 3.5cm when viewed from above.calculate the refractive index of the liquid.
The refractive index of the liquid, given that the depth is 4 cm and the coin appears to be 3. 5 cm is 1.2
How do i determine the refractive index?Refractive index is related to real depth and apparent depth according to the following formula:
Refractive index = Real depth / Apparent depth
With the above formula, we can obtain the refractive index as illustrated below:
Real depth of liquid = 4.2 cmApparent depth of liquid = 3.5 cmRefractive index = ?Refractive index = Real depth / Apparent depth
Refractive index = 4.2/ 3.5
Refractive index = 1.2
Thus, the refractive index is 1.2
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A charge of 100 elementary charges is equivalent to (1) 1. 60 times 10^-21 C (2) 1. 60 times 10^-17 C (3) 6. 25 times 10^16 C (4) 6. 25 times 10^20 C
A charge of 100 elementary charges is equivalent to (2) 1. 60 times 10^-17 C
What is the charge of one elementary charge?A single electron or proton's electric charge is referred to as an elementary charge. It is a fundamental physical constant with a magnitude of approximately 1.602 x 10-19 coulombs (C). Electric charge is quantized using the elementary charge, which is thought to be the smallest amount of electric charge that can exist in nature. The elementary charge is the same for both particles because protons and electrons have the same and opposite charges. The behaviour of atoms and molecules is greatly influenced by their elementary charge, which also determines their electronic structure and affects how they interact with other charged particles in their environment.
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An object moves 9.71 meters east in 6.18 seconds. Calculate its velocity.
Answer:
hi
Explanation:
there is the answer
hope it helps
good luck
As shown in the diagram, two metal-coated pith balls are suspended by a thread and given a charge so they are held apart by a force of repulsion. Which diagram best shows the position of the pith balls after they are both touched by an experimenter's finger?
The pith balls are having same charge and that is why they are held apart by the force of repulsion. When they both touched by the experimenter's finger they both gets attracted to the finger and comes in contact as in B.
What is electrostatic force ?Electrostatic force between two charges are arise when the charged bodies comes in contact. There are both force of attraction and repulsion. The electrostatic force of attraction results from the two unlike charges and the force of repulsion arise between two like charges.
Here, the pith balls are charged alike, hence they will get repelled. Ig they are negatively charged, the electrons will flow from them to the other body in touch.
When the experimenter touch his finger on the charged ball, the finger gets polarized and attracted to the ball , they gets in contact as in figure B.
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Of the following expressions, which ones give the correct torque produced by the force f→ around point p ?
Force is the influence that causes the stir of an object with mass to change speed, i.e. accelerate.
The equations τ = r Fsinθ show that the torque can be written in three ways. It can be the product of the force, the switch arm and the sine of the angle between them.
Can be the product of the force and the element of the switch arm vertical to the force. It can also be written as the product of the switch arm and the force vertical to the switch arm.
The computation shows that the three dyads are equal. Expressions include
80N)(5.0 m)( sin 37 ∘)).
48N)(5.0 m).
80N)(3.0 m).
Force is an external factor that can change a body's state of rest or motion. It has size and direction. The direction in which the force is applied is known as the force direction, and the force impact is where the force is applied.
Question
Consider the force F = 80N applied to the ray as shown in the figure below. The length of the ray is ℓ = 5.0 m and θ = 37 ∘, so x = 3.0 m and y = 4.0m.
Which of the following statements gives the correct moment generated by the force F → about the point P?
Which of the following expressions gives the correct torque produced by a force about a point?
80 N)(5.0 m).
48 N)(5.0 m)( sin 37 ∘).
80 N.
80 N)(5.0 m)( sin 37 ∘)).
48 N)(5.0 m).
80 N)(4.0 m).
80 N)(3.0 m).
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Please need help asap
Answer:
The answer is definitely A
An electron moves in a circular path with a radius of 0.20 m at a constant speed of 1.5 X 105 m/s. What is the period of its motion?
Answer:
V = 2 π R / T speed V where T is period
T = 2 π R / V = 2 π * .2 m / 1.5E5 m/s = 8.38E-6 sec
Period = 8.36 * 10-6 sec
3. What is the frequency of a wave that has a wave speed of 80 m/s and a wavelength of 0.3 m?
Answer:
266.6 HertzExplanation:
Given :
Wavelength = 0.3 m Wave speed = 80 m/sWe need to find the frequency of the wave
Using formula:
[tex]{ \boxed{ \sf{F = \dfrac{v}{ \lambda} }}} \\ [/tex]
Where,
F is frequency,v is wave speed,λ is WavelengthOn substituting the required values, we get:
[tex] \dashrightarrow \sf \: F = \dfrac{80}{0.3} \\ \\ \dashrightarrow \sf \: F = 266.6 \: Hz[/tex]
Therefore,
Frequency of the wave is 266.6 HertzChaya analyzes the data for two stars. Both are the same color, but the first star has an absolute brightness greater than the second star. What should Chaya conclude about the stars
Greater in size than that of the second star is the first star. If Chaya looks at the information for two stars. They are both the same hue, yet the first star is brighter overall than the second.
What is a star's actual brightness?A star's absolute magnitude, M, is the magnitude it would have if it were situated 10 parsecs away from Earth. Astronomers might compare the true (intrinsic) brightness of various stars by taking into account stars at a given distance.
What two elements affect a star's brilliance in its purest form?More powerful (or greater wattage) stars will glow brighter than less powerful ones (lower wattage). Nevertheless, that because a star appears brighter doesn't always imply it is. The brilliance of a star is also influenced by how close to us it is. An thing seems darker the further it is away.
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Match the metric units with these measurements.
force:
Choose...
distance:
Choose...
work:
Choose...
power:
Choose...
energy:
Choose...
time:
Choose...
opptions are: second, Watt, joule, Newton, and meter.
The metric units with these measurements is force: Newton
What is metric units?Metric units are a type of measurement system based on the meter, kilogram, and second. It is the most widely used system of measurement in the world and is used by most countries. Metric units are based on a decimal system, which means that each unit is a multiple or fraction of 10, and is defined in relation to a basic unit. For example, the meter is defined as the distance traveled by light in a vacuum in 1/299,792,458 of a second. Other metric units, such as the liter, are defined as multiples of the basic unit.
distance: meter
work: joule
power: Watt
energy: joule
time: second
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1 point
A swimmer can swim at a speed of 2.2 m/s for 372 seconds. What distance will she cover in that time?
Answer with zero decimal places. (round up to nearest whole number)
The swimmer will cover a distance of 818.4 meters in 372 seconds, swimming at speed of 2.2 m/s.
What is speed?The magnitude of change of its position over time or the magnitude of change of its position per unit of time is called speed.
We use this formula: distance = speed x time
speed is the swimmer's speed, and time is the time she swims for.
Substituting the given values, we get: distance = 2.2 m/s x 372 s
Calculating the product, we obtain:
distance = 818.4 meters
Therefore, the swimmer will cover a distance of 818.4 meters in 372 seconds, swimming at a speed of 2.2 m/s.
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Determine the molar mass of a gas if the volume of 0.05 g of the gas is 50cc at 27°c and 76 cm Hg pressure.
14. What force is required to
accelerate a car with a mass of 1900
kg at a rate of 6.0 m/s/s?
Answer:
Force (F)= 1.14×10⁴NExplanation:
Greetings!!!
Given values:-Mass(m)= 1900kg
Acceleration (a)= 6.0m/s²
Required values :-Force (F)= ?
Solution :-Firstly, recall Newton's second law.
F= maSubstitute known variables into the equation
F= (1900)×(6.0)Solve for Force
F= 1.14×10⁴NIf you have any questions tag me on comments
Hope it helps!!!
Calculate the force between a charge of 8.0 x 10-9 C and a charge of 2.0 x 10-3 if they are 0.80 m apart.
Using Coulomb's Law, the force between two charges is given by:
F = k * q1 * q2 / r^2
Where k is Coulomb's constant (9.0 x 10^9 N*m^2/C^2), q1 and q2 are the charges, and r is the distance between the charges.
Substituting the given values, we have:
F = (9.0 x 10^9 N*m^2/C^2) * (8.0 x 10^-9 C) * (2.0 x 10^-3 C) / (0.80 m)^2
F = 36 N
Therefore, the force between the two charges is 36 N.
What is Coulomb's law?
Coulomb's law can be used to calculate the force between any two charged particles, including protons, electrons, and ions. The force can be either attractive or repulsive, depending on the sign of the charges. If the charges are the same (both positive or both negative), the force is repulsive, while if the charges are opposite, the force is attractive.To know more about Coulomb's law, click the link given below:
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If 450 J of work are needed to move a crate a vertical distance of 11 m, what is the weight of the crate?
The weight of the crate moved vertically is 40.9 Newton.
What is the weight of the crate?To solve this problem, we can use the formula for work done, which is:
Work done = force × displacement
Where force is the weight of the crate, distance is the vertical distance moved.
We can rearrange the formula to solve for the weight of the crate:
Force = work / displacement
Given that;
Work done = 450 JDisplacement = 11 m.Plugging in the values, we get:
Force = work / displacement
Force = 450 J / (11 m )
Force = 40.9 N
Therefore, the weight of the crate is 40.9 N.
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A cannon ball is fired horizontally with a velocity of 50m/s from the top of a cliff 90m high.
a. After how many seconds will it strike the plain at the foot of the cliff?
b. At what distance from the foot of the cliff will it strike?
c. With what velocity will it strike the ground?
Answer:
a. time of flight = 4.285 s
b. horizontal distance reached = 214.25m
c. final velocity = 65.3m/s, at 40° downwards
Explanation:
This is a projectile motion question.
Things to note, in all projectile motion questions:
in the horizontal component, velocity is always constant. There is no horizontal acceleration. at maximum height reached by the object, vertical velocity = zerothe only vertical acceleration, is acceleration due to gravity = 9.8 m/s²vertical displacement, is initial height minus final height. ΔSIn projectile motion questions, we will use the three equations of motion:
[tex]v=u+at\\v^2=u^2+2as\\s=ut+\frac{1}{2}at^2[/tex]
Thus we can adjust our equations for the x - component:
[tex]v=u\\s=ut[/tex], since acceleration = 0
For the y - component:
[tex]v=u-gt\\v^2=u^2-2gs\\s=ut-\frac{1}{2}gt^2[/tex], since acceleration = gravity (9.8 m/s²), downwards.
Now, with our question, we can note: u(x) = 50m/s, and u(y) = 0, since, initially, only horizontal motion. Also, s(y) = - 90m.
(a) After how many seconds will it strike the plain at the foot of the cliff?
In this question, we are asked to find time of flight, 't'. As we have s(y), u(y), and g, we can use the third equation, [tex]s=ut-\frac{1}{2}gt^2[/tex] to find t.
Since u=0, thus, - 90 = -1/2×9.8×t². solving this algebraically, therefore, time of flight = 4.285 s.
(b) At what distance from the foot of the cliff will it strike?
Now, we need to find the horizontal distance or range. All we can use to do this is s = ut. Since we know that u=50m/s, and t=4.285s, this will be easy. s = (50)(4.285) = 214.25 m.
Therefore, horizontal distance reached = 214.25m.
(c) With what velocity will it strike the ground?
In this part, we need to find final velocity. Final velocity = the resultant vector of both the x and y velocity components. [tex]v=\sqrt{(v_x)^2+(v_y)^2}[/tex].
Since horizontal velocity is constant, u = v, and therefore, v(x) = 50m/s.
For vertical velocity, we can use [tex]v^2=u^2-2gs[/tex]. u(x) = 0, and s(y) = -90m.
Therefore, v² = -2(9.8)(-90). final vertical velocity is thus 42m/s.
Now final velocity = √(50² + 42²) ≈ 65.3 m/s.
Lastly, we need to remember to calculate direction, since velocity is a vector quantity. the direction of velocity (θ) [tex]=tan^{-1}(\frac{v_y}{v_x})[/tex]
Therefore, θ = 40°.
Therefore, final velocity = 65.3m/s, at 40° downwards.