Answer:
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a 1.25 kg falcon catches a 0.275 kg dove from behind in midair. what is their velocity after impact if the falcon's velocity is initially 28.5 m/s and the dove's velocity is 5.95 m/s in the same direction?
The velocity after impact if the falcon's velocity is initially 28.5 m/s and the dove's velocity is 5.95 m/s in the same direction is 23.58 m/s
What is the law of conservation of momentum?Momentum is never created or destroyed inside a problem domain, according to the principle of momentum conservation. Momentum is only changed by the action of forces as Newton's equations of motion describe them.
Velocity after impact if the falcon's velocity is initially 28.5 m/s and the dove's velocity is 5.95 m/s in the same direction is 23.58 m/s.
Mass 1 = m₁ = 1.25 kg
Mass 2 = m₂ = 0.275 kg
Speed 1 = v₁ = 28.5 m/s
Speed 2 = v₂ = 5.95 m/s
Speed 3 = v₃ = ?
m₁v₁ + m₂v₂ = (m₁ + m₂)v₃
v₃ = [m₁v₁ + m₂v₂] / (m₁ + m₂)
v₃ = [(1.25 x 28.5) + (1.25x 0.275)] / (1.25 + 0.275)
v₃ = [ 35.625 + 0.34375] / 1.525
v₃ = 35.96 / 1.525
= 23.58 m/s
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in a series dc circuit with 6 resistors with the following values: 4 ohms, 7 ohms, 12 ohms, 8 ohms, 2 ohms, and 15 ohms, how would you calculate the total resistance in the circuit and what is the correct answer?
The total resistance of the 6 resistors connected in a series DC circuit is 48 ohms
The resistance of the resistor 1 = 4 ohms
The resistance of the resistor 2 = 7 ohms
The resistance of the resistor 3 = 12 ohms
The resistance of the resistor 4 = 8 ohms
The resistance of the resistor 5 = 2 ohms
The resistance of the resistor 6 = 15 ohms
Let R₁, R₂, R₃, R₄, R₅, R₆ be the resistance of the 6 resistors.
The total resistance of the resistors connected in series can be found using the formula
R = R₁ + R₂ + R₃ + R₄ + R₅ + R₆
where R is the total resistance of the resistors
Let us substitute the known values in the above equation, we get
R = 4 + 7 + 12 + 8 + 2 + 15
= 48 ohms
Therefore, the total resistance of the 6 resistors connected in series is 48 ohms
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How much work do you do when you lift a 110 N child 0.5 m?
Work done in lifting a 110N child for 0.5m is 55 Joules.
The work done by a force is defined as the product of the force's component in the direction of displacement and the magnitude of displacement.
Work can be computed by multiplying Force by Distance in the force's direction, as shown below.
W = F × d (where F= force & d= displacement).
The standard unit used to measure energy and work done in physics is the joule, which has the symbol J. In mechanics, 1 joule is the energy transferred when a force of 1 Newton is applied to an object and moves it through a distance of 1 meter.
Work done (W)= F×d
W= 110×0.5
Therefore,
W= 55 Joules.
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Why do you measure the disappearance of reactant and not the appearance of product in this experiment?.
The disappearance of the reactant and not the appearance of the product in this experiment is flipping the sign-on rates for reactants.
The reaction rate is a measure of the change in concentration of the disappearance of a reactant or the change in concentration of the appearance of a product per unit of time. The vanishing rate value is always negative because the reactant concentration is consumed in the reaction. The product is formed in a reaction, so the rate of occurrence value is always positive.
The rate of reaction is defined as the rate of disappearance of reactants and the rate of appearance of products, and the rate constant is the constant of proportionality between reaction rate and concentration conditions. The rate of a chemical reaction can be measured as the rate of appearance of one of the products or the rate of disappearance of one of the reactants. If the reactant concentration decreases, use the negative sign to represent the rate of reaction for the reactant.
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A shopper walks eastward 5.4 meters and then westward
8.9 meters.
what is the magnitude and direction of the displacement?
Answer:
Explanation:
West (8.9 - 5.4) = 3.5 meters
a hydraulic jack has an input piston of area 0.0580 m2 and an output piston of area 0.680 m2. how much force (in n) on the input piston is required to lift a car weighing 1.45 ✕ 104 n?
The force on the output piston to lift a car is 17 ×10⁴N
The push or pull on a mass-containing item changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
We are given that,
The input area of the piston = A₁ = 0.0580m²
The output area of the piston = A₂ = 0.680m²
The lift a car weighing = F₁ = 1.45× 10⁴N
Therefore , the input force on the piston can be calculated by the formula,
F₁/A₁= F₂/A₂
( 1.45× 10⁴N)/(0.0580m²) =F₂ /( 0.680m²)
F₂ = ( 1.45× 10⁴N)/(0.0580m²) ×( 0.680m²)
F₂ = 17 ×10⁴N
Thus, the output effort of the piston on the car would be 17 ×10⁴N.
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A ball of mass 50 g moving with a velocity 50 m/s comes to rest due to friction. What is the final momentum of the ball?
a)2500 Kg m/s b)Zero
c)2.5 Kg m/s. c)2500g m/s
The final momentum of the ball of mass 50 g moving with a velocity 50 m/s after coming to rest due to friction is zero.
p = m v
p = Momentum
m = Mass
v = Velocity
m = 50 g
v = 0 ( After rest due to friction )
p = 50 * 0
p = 0
Momentum is called as mass in motion. If there is no motion on the object there could be no momentum. Its unit is Kg m / s.
Therefore, the final momentum of the ball is zero ( b )
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A car of mass 1200kg travels at a steady speed of 22ms around a bend of radius 50m.find the centripetal force required
Given: mass(m) = 1200 kg, velocity(v) = 22 m/s, and with a radius(r) = 50 m
First thing, centripetal force is developed by the car traveling in a circle.
To find centripetal force( Fc ) use this formula: Fc=m.v²/r
m.v²=1200(22)²
=580,800
Fc = 580,800/50
Fc = 11616 N
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A 25. 0 g sample of a metal at 87. 7 deg c is placed in 37. 4 g of water at 10. 3 deg c, and the final temperature of the system is 15. 4 deg c. Calculate the specific heat of the metal in j/g c.
An object is said to get an impulse when a force is delivered to it over a predetermined amount of time. Where J is the impulse, F is the force, and t is the time, the formula for the impulse's magnitude is:
The momentum of an object changes when it receives an impulse, as in: The energy amount leaving the heated water is equal to the energy amount entering the cool water. This implies:
q gained = q lost
This results in the following substitution: (25.0) (85.0 x)(0.45) = (75.0) (x 20.0). (4.184)
Solve for x.
Please take note of the use of the iron-specific heat value. The temperature is 0.45 J per gram Celsius.
Considering that 75/25 = 3, we arrive to the following equation: 38.25 0.45x = 12.552x 251.04 and 13.002x = 289.29. The solution is 22.25 °C.
Point to keep in mind.Be aware that the temperature of the iron decreases significantly whereas the water just changes by 2.25 degrees in this example. This is the typical scenario for a problem of this nature.
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Suppose a skydiver (mass = 120 kg) is falling toward the Earth. When the
skydiver is 200 m above the Earth he is moving at 80 m/s. At this point calculate the
skydiver's.....
a. Gravitational potential energy
Formula with variables (letters):
Formula with numbers:
Answer with units:
b. Kinetic energy
Formula with variables (letters):
Formula with numbers:
Answer with units:
c. Total mechanical energy (The sum of kinetic and potential energy)
Formula with variables (letters):
Formula with numbers:
Answer with units:
The energy that a body or object has as a result of being in a gravitational field is known as gravitational potential energy. Because of the gravitational attraction, this energy is dependent on how high an object is in relation to a point of reference.
Equation for gravitational potential energyThe gravitational potential energy will have the following value in the case of the Earth, when the gravitational field is thought to remain constant:
u = mgh
Where:
m = 120 kg is the skydiver's weight.
g = 80 m/s the gravitational acceleration
h = 200m the skydiver's height
Answer PE = 1920000 J.
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A laser beam in air is incident upon ethanol at an angle of incidence of 37.0°.
What is the angle of refraction
The angle of refraction will be 26.4°
Organic substances include ethanol. With the chemical formula C2H6O, it is a straightforward alcohol. Its chemical formula can also be expressed as C2H5OH or CH3CH2OH. Ethanol is a volatile, flammable, colorless liquid with a pronounced wine-like aroma and unpleasant taste.
The angle of incidence is the angle formed by an incident ray and the normal, or line perpendicular to the incident surface, at its point of incidence. Any type of wave, including optical, acoustic, microwave, X-ray, and others, can create a ray.
Refraction is the path of a light wave being bent as it crosses the divide between two media. Refraction results from a wave's change in speed when it encounters a change in medium.
The angle of refraction, which depends on the material's refraction index, is the degree by which this light bends away from or toward the normal line. Each type of material has its own constant known as the refraction index. The amount that an incident light beam is refracted as it passes through directly affects it. It is frequently represented as n and may be calculated by dividing the velocity of light moving through the medium (v) by the speed of light in a vacuum (c):
n = c / v
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the ball is released from rest and rolls without slipping down the rough half, reaches the bottom, and then moves up the frictionless half. assuming the ball is a uniformly dense sphere, what is the ratio of the final height to the initial height?
The ratio of the final height to the initial height is 5:7 .
What is conservation of mechanical energy?
Gravitational potential energy and kinetic energy are the two types of energy that we have examined thus far. Mechanical energy is the total of gravitational potential energy and kinetic energy. The mechanical energy will be constant in a closed system, one in which there are no external dissipative forces at work. In other words, nothing will alter (become more or less). The Law of Conservation of Mechanical Energy is what we refer to as this.
From conservation of mechanical energy for rough half ball
mghi= 1/2mv2 +1/2I w2
From above
v = [tex]\sqrt{10/7ghi}[/tex]
Further due to conservation of energy
1/2mv2 = mghf
hf/hi = 5/7
Hence, the ratio of the final height to the initial height is 5:7 .
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ANSWER PLEASE 20 POINTS AND MARKED AS BRAINLIEST MY GRADE DEPENDS ON IT PLEASE PLEASE PLEASE
Your friend throws a rock off of a cliff straight down with an initial speed of 7.50 m/s. Using a stopwatch, you determine it takes the rock 4.50 s to hit the ground below. How high is the cliff?
Answer:33.75m
Explanation: If you are throwing a rock down a cliff with a speed of 7.50m/s and it reached the ground in 4.50 seconds the height of the cliff will be 33.75m because 7.50m/s x 4.50s = 33.75
temperature can be thought of as . a. the amount of heat in a material b. the density of the material c. a description of the level of heat d. the weight of the total mass of the material
The temperature can be thought of as a description of the level of heat. The correct option is c.
What is temperature?Temperature is a measure of how hot or cold something is expressed in terms of one of several scales, including Fahrenheit and Celsius.
The average kinetic energy of the molecules in water is measured by temperature.
Temperature can be thought of as an expression of the "intensity" with which a body's thermal energy manifests itself in the form of chaotic, microscopic molecular motion.
The total energy of all molecular motion inside an object is defined as its heat. Temperature is a measure of the thermal energy or average heat of a substance's molecules.
Thus, the correct option is c.
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substance is one that has unpaired electrons that are aligned in a particular direction. it is a. slightly repelled in a magnetic field. b. attracted to a magnetic field. c. strongly attracted to a magnetic field.
a) In a magnetic field, a diamagnetic substance is weakly repelled.
b) A magnetic field attracts a paramagnetic substance.
c) ferromagnetic material - a material that is strongly attracted to a magnetic field.
Diamagnetism is an extremely weak type of magnetism induced by such a magnetic field applied that alters electron orbital mobility. This magnetism occurs only in the presence of an external magnetic field.
Paramagnetic magnets are metals that are only mildly attracted to magnets. Examples include aluminum, gold, and copper. The atoms of this chemical include electrons, the majority of which spin in the same direction, but not all. This influences the polarity of the atom.
A ferromagnetic substance possesses spontaneous magnetization just at the atomic level in the absence of an external magnetic field. When a ferromagnetic substance is subjected to an external magnetic, it's become strongly magnetized in the direction of the magnetic field.
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.
What is formed at mid-ocean ridges as magma rises and cools?
convergent plates
new continents
new continental crust
new ocean crust
Answer:
(C) new continental crust
Explanation:
What was the original classification for stars and why didn't they change it?
Answer:
Originally, stellar classification or the way astronomers classify stars, was done primarily through mass, temperature, and color. Since stars have more characteristics than mass, temperature, and color, scientists have adapted and added to star classification. divided stars into four broad, numbered categories based on common spectral features.
Explanation:
could you help me pleaseeeeeeee " if a car starts from a stop and speeds up to 15 m/s in a time frame of 5 seconds calculate the acceleration
Answer:
[tex]vf=vi+at\\vf=15\\vi=0\\a=?\\t=5\\\\15=0+a5\\a=\frac{15}{5} \\a=3[/tex]
Therefore the acceleration is 3m/s^2
Explanation:
We will be using the kinematics big five equations. Specifically, the one without displacement (d).
Write out your values and substitute the, into the equation.
Solve for a.
Note. Starts from stop so vi=0
Which characteristic does an object with a constant acceleration always have?
changing velocity
constant velocity
fast speed
slow speed
Changing velocity of an object will always have a constant acceleration.
Changing velocity is the rate of change of displacement with respect to time.
When an object is moving at a constant velocity, it means that the moving object has no acceleration.
However, when an object is moving, its velocity in one direction is the same during each time interval, then the acceleration of the object or body is said to be constant.Therefore, when an object moves with constant acceleration, its velocity changes by a constant amount during the same time interval.The constant velocity, having a constant acceleration does not imply that the object is stable.Acceleration due to gravity is the best example of constant acceleration.
Therefore, when something has constant acceleration, it means that it has change in its velocity which is same in every time interval.
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Answer:
changing velocity
Explanation:
Rotating frames of reference cause objects to accelerate toward the center of the circle, creating centripetal force.
Please select the best answer from the choices provided
T
F
It is a true statement that Rotating frames of reference cause objects to accelerate toward the center of the circle, creating centripetal force.
What is the centripetal force?The centripetal force is the force that acts towards the center of the motion. We knw that it is this centripetal force that keeps an object moving in a circular path. It prevents the object from being thrown out.
Hence, we can see that in spite of the opposing forces, what would stop the object from falling out of the field of the circular motion is the centripetal force that acts on it in the circular path.
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distance
gravitational constant
X Suppose the gravitational force between two spheres is 60 N. If the
magnitude of each mass doubles, what is the force between the masses?
120 N
180 N
140 N
300 N
Answer:
C. 240 N
Explanation:
I think you have the third answer choice incorrect. It should be 240N because that is the correct answer
From newtons law of gravitation, the gravitational force equation between two objects is given by
[tex]F = \dfrac{Gm_1m_2}{r^2}[/tex]
where m₁ and m₂ are the masses of the two objects, G = gravitational constant and r the distance between the objects
If we double m₁ and m₂, the new gravitational force becomes
[tex]F = \dfrac{G(2m_1)(2m_2)}{r^2} = \dfrac{4Gm_1m_2}{r^2}\\\\[/tex]
which is 4 times the original force
So if original force = 60 N, then resultant force after doubling both the masses = 4 x 60 =240N
An engineer is hired by a tire company to determine the effectiveness of tires stopping quickly in the snow and rain. How might a test like this be used to help determine If tires were or weren't effective?
Winter tyres reduce braking distance by 10% on wet surfaces and by 20% on snow.Tire tests are used to analyze a tire's performance in terms of grip, wear, noise, rolling resistance and behavior
What does a tire perform?Performance tires are made to improve the handling and traction of sports cars and other vehicles, especially in dry and wet situations. They play a crucial role in providing the thrilling driving experience that competitive drivers desire.
Why are tires considered high performance?Because the sidewalls are already rigid, tires with low and ultra-low profiles (aspect ratios of 30-45) are frequently high performance tires. These tires' drawbacks include their increased noise level, increased bumpiness, and often shorter tread life compared to touring tires.
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with atmospheric perspective, objects further from the viewer appear cooler and more detailed. cooler and less distinct. warmer and more detailed. warmer and less distinct.
With atmospheric perspective, objects further from the viewer appear cooler and less distinct.
The term "atmospheric perspective" describes how the atmosphere affects how objects appear when viewed from a distance. Further away things are less distinct, and their color changes in value, saturation, and hue. Exaggerating these effects in your painting will help you as an artist to add more atmosphere and feeling to your creations.
This enhances the appearance of depth and distance and contributes to the setting of the landscape's atmosphere and vibe. This tone and feeling are crucial components of the visual poetry of a landscape painting. Aerial perspective is another name for atmospheric perspective.
In order to convey a sense of distance and depth in a painting, an artist can employ either atmospheric perspective or linear perspective.
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A comet speeds up as it approaches the Sun. Which statement about its kinetic energy is correct?(1 point)
1. The comet has no kinetic energy because it is in outer space.
2. The comet’s kinetic energy stays the same.
3. The comet’s kinetic energy increases.
4. The comet’s kinetic energy decreases.
A comet speeds up as it approaches the Sun. Which statement about its kinetic energy is correct option is - (1) The comet has no kinetic energy because it is in outer space.
Large ice and dust-based bodies known as comets circle the Sun. These ancient objects, which are best known for their long, streaming tails, are relics from the solar system's birth 4.6 billion years ago. The majority of comets are located outside of our solar system. Some are found in the Kuiper Belt, a vast disc that extends past Neptune's orbit. These are known as short-period comets. They orbit the Sun in lesser than 200 years.The Outermost Layer, the solar system's sphere-shaped outer edge, which is nearly 50 times further from the Sun than the Kuiper Belt, is home to additional comets. Because of how much longer it takes them to orbit the Sun, these are known as long-period comets. The comet with the longest known orbit completes one orbit in excess of 250,000 years.To know more about comet
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Answer:
Factors that Affect Kinetic Energy Quick Check
Explanation:
1. KE=1/2mv^2
2.The comet’s kinetic energy increases.
3. 3,388 J
4. The wagon will have more kinetic energy than when it was empty.
5. Find two objects with the same mass and think of a way to demonstrate their kinetic energies at different velocities.
What characteristic makes mitochondrial DNA class evidence instead of individual evidence?
Mitochondrial DNA matches the lineage of multiple people.
Mitochondrial DNA is passed down from a mother.
Mitochondrial DNA is identical to nuclear DNA.
Mitochondrial DNA is unique to one person.
Answer:
(A) Mitochondrial DNA matches the lineage of multiple people.
Explanation:
We know that some individuals can have the same Mitochondrial DNA sequences. So therefore, Mitochondrial DNA is class evidence since it can match to a lineage of multiple people. This makes mitochondrial DNA class evidence instead of individual evidence.What is the difference in timbre between the two flutes?
Answer:
Explanation:
The timbre of the concert flute is homogeneous in all registers with only the very lowest and highest notes exhibiting any different qualities. Because they contain few overtones, the lowest notes can sound rather dull, dry and hollow which gives them a melancholy character.
Please show the work
the weight of the car is 11500 newtons, normal force on the car is 11100 newtons and friction force on the car is 2967 newtons.
what is newtons law of motion?
newtons law of motion is a set of laws given by Sir Issaac newton for calculating the distance covered by a body with constant acceleration or the velocity of the object.
what is weight and normal force?
weight is the force exerted by the body on the surface of earth.
normal is the force exerted by the surface perpendicular to a force.
SI unit of the weight and normal is newton.
given:
mass of the car = 1150 kg
angle of inclination = 15°
In the free body diagram weight of the car will act in downward direction and a friction force parallel to the surface of the inclined plane against the motion and a normal force perpendicular to the surface.
the weight of the car is = mass of the car × acceleration due to gravity
acceleration due to gravity = 10m/s²
therefore, the weight of the car is 11500 newtons
normal force acts against cosine component of the weight.
cosine 15° × weight of the car = normal force
0.965 × 11500
normal force = 11100 newtons
friction force will act against sine component of the weight.
friction force on the car = sin 15° × 11500
friction force on the car = 2967 newtons
therefore, the weight of the car is 11500 newtons, normal force on the car is 11100 newtons and friction force on the car is 2967 newtons.
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Suppose you roll a special 9-sided die. What is the probability that the number rolled is a "7" OR a "8"?Enter you answer as a fraction or a decimal with 3 decimal digits.
A 9-sided die has 9 sides meaning that there are a total of 9 possible outcomes.
We are interested in the outcomes "7" OR a "8"
The probability that the number rolled is a "7" is given by
[tex]P=\frac{number\text{ of favorable outcomes}}{\text{total number of outcomes}}[/tex]There is only 1 favorable outcome which is to roll a "7" and the total number of outcomes are 9.
[tex]P(7)=\frac{1}{9}[/tex]So, the probability that the number rolled is a "7" is 1/9
The probability that the number rolled is a "8" is given by
There is only 1 favorable outcome which is to roll a "8" and the total number of outcomes are 9.
[tex]P(8)=\frac{1}{9}[/tex]So, the probability that the number rolled is a "8" is 1/9
The probability that the number rolled is a "7" OR a "8" is given by
[tex]P(7\; or\; 8)=P(7)+P(8)=\frac{1}{9}+\frac{1}{9}=\frac{2}{9}[/tex]There is a 2/9 probability that the number rolled is a "7" OR a "8".
3. a ball is projected 125 m straight upward and then falls the same distance back to its starting point. neglecting air resistance, what is its total time in the air?
The total time in the air during uniform motion is 10.10 seconds.
We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
vo = 0 m/s
s = 125 m
a = g = 9.8 m/s²
By using the third equation, we can find the time taken to fall to the ground
s = vo . t + 1/2 . a . t²
125 = 0.t + 1/2 . g . t²
1/2 . 9.8 . t² = 125
t² = 250/9.8
t = 5.05 seconds
The total time should be twice
t total = 2t
t total = 2 . 5.05
t total = 10.10 seconds
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A car applies a force of 36.8 Newtons for a 668-meter loop; what was the work done?
A.705 J
B.0 J
C.24,600 J
D.18.2 J
Answer:
C. 24,600
Explanation:
Work = F × s
Work = 36.8 × 668
SO
Work = 24,582J rounding up to 24,600 J
Answer:
24,600
Explanation:
