Answer: The beat frequency detect by the woman is f0 [ 2v / ( v - vW) ]
Explanation:
given a Doppler effect,
the frequency heard by the listener in terms of frequency of source is expressed as;
fL = [ (v + vL) / (v + vS) ] fS
vL is the velocity of the listener, vS is the velocity of the source and V is the velocity of sound.
Now What beat frequency does the woman detect (in terms of the given quantities)?
The wall will receive and reflect pulses at a frequency of;
fWALL =( v / (v - v0)) f0
so the woman will hear this wave;
fWOMAN = ((v + vW) / v) ( v / (v - vW)) f0
fWOMAN = (( v + vW) / ( v - vW)) f0
Now the beat frequency will be;
fBEAT = ((v + vW) / (v - vW)) f0 - f0
fBEAT= f0 [ ((v + vW) / (v - vW)) - 1 ]
fBEAT= f0 [ 2v / ( v - vW) ]
The beat frequency detect by the woman is f0 [ 2v / ( v - vW) ]
If a stone is thrown vertically upward with a velocity of 25 m/s, what will be the velocity of the stone after 1 second?
Answer:
Vf = 15.19 [m/s]
Explanation:
To solve these problems we must use the following kinematics equation:
[tex]v_{f}=v_{i}-(g*t)\\[/tex]
where:
Vf = final velocity [m/s]
Vi = initial velocity = 25 [m/s]
g = gravity acceleration = 9.81 [m/s^2]
t = time = 1 [s]
Note: the negative sign of the equation means that the gravitational acceleration acts in the opposite direction to the movement of the stone.
Now replacing:
Vf = 25 - (9.81*1)
Vf = 15.19 [m/s]
A small can of soup has a mass of about 400 g. What would its mass be on the moon?
Answer:
400g
Explanation:
Mass of an object never changes, its weight does
Assuming you wanted to know the weight on moon:
mass (in kg) = 0.4 kg
let the value of g on earth = 10 m/s/s
F = ma
Weight on Earth = 4 N
Value of g on moon = 1.62 m/s/s
m = 0.4 kg
Weight on Moon:
F = ma
F = 0.4 * 1.62
F = 0.648 N
Hence, the weight of the can of soup on moon will be 0.648 N
The initial time, final time, and time interval for this video sequence are already entered in the table below. Enter velocity observations for these two times, and then calculate the change in the boy’s velocity and his average acceleration during this time interval. (Be sure to double-check signs in your results. Remember, the boy is slowing down, not speeding up!)
Answer:
De pic has the answers
Explanation:
Love fnaf
what is total revenue in economics
Answer:
be more specific
Explanation:
True or false. As a wave travels through a given material its velocity changes.
Answer:
false is the correct answer
Answer:
false
Explanation:
The speed of propagation depends only on the wavelength of the wave.speed of propagation is constant in a given medium; only the wavelength changes as the frequency changes.
A car traveling at a velocity of 40 m/s accelerates at 5 m/s/s for 10 seconds. What is the car's final velocity?
Answer:
The answer is 90 m/sExplanation:
To find the final velocity of an object given it's initial velocity , time taken and it's acceleration we use the formula
v = u + atwhere
v is the final velocity
u is the initial velocity
t is the time taken
a is the acceleration
From the question
u = 40 m/s
t = 10s
a = 5 m/s²
We have
v = 40 + 5(10) = 40 + 50
We have the final answer as
90 m/sHope this helps you
A race car exerts 18,344 N while the car travels at an acceleration of 92.54 m/s2. What is the mass of the car? (Use the formula m=F/a)
Answer:
The answer is 198.23 kgExplanation:
To find the mass of an object given it's mass and acceleration we use the formula
[tex]m = \frac{f}{a} \\ [/tex]
where
m is the mass
F is the force
a is the acceleration
From the question
a = 92.54 m/s²
F = 18,344 N
We have
[tex]m = \frac{18344}{92.54} \\ = 198.2277933...[/tex]
We have the final answer as
198.23 kgHope this helps you
A sphere of radius 50 mm and mass 1 kg falling vertically through air density 1.2 kg m attains a steady velocity of 11.0 m sr', If the above equation is applied to its fall, what is the value of k in this case?
Answer:
the value of k is 2.21 in this case
Explanation:
im sorry if its wrong but i think its right
state Boyle's law .Explain why this law may not apply in solids
Which of the following is NOT one of the four Grand Slam Tournaments?
Australian Open
French Open
Davis Cup
Wimbledon
Answer:
Davis Cup
Explanation:
Hope this Helps!
Davis Cup is NOT one of the four Grand Slam Tournaments in tennis sports.
What is the tennis Davis Cup?The tennis Davis Cup is a tournament between teams for countries which is played every year.
The tennis Davis Cup is very popular and therefore all countries hope to win this tournament.
In conclusion, Davis Cup is NOT one of the four Grand Slam Tournaments in tennis sports.
Learn more about tennis sports here:
https://brainly.com/question/1593785
#SPJ6
A charge of +0.4 C is moved from a position where the electric potential is 20 V to a position where the electric potential is 50 V. What is the change in potential energy of the charge associated with the change in position
O A. It isn't known why ECT works when it does work . B. Side effects may include memory loss that lasts for years . O C. Disorientation and confusion always accompany ECT therapy . O Depression doesn't return after ECT treatments have been concluded .
Answer:
B because sure that works ig lol
Which of the following is the correct definition of emotion?
a.an aspect of consciousness characterized by a certain physical arousal involving facial and bodily changes, brain activation, and tendencies toward action, all shaped by cultural rules
b.a set of social and cultural rules that regulates when, how, and where a person may express (or must suppress) feelings
c.an irrational aspect of our mammalian heritage that is distinctive from our rational abilities of cognition
d,the process by which the facial muscles send messages to the brain about bodily changes
Answer:
a) an aspect of consciousness characterized by a certain physical arousal, a certain behavior that reveals the feeling of the outside world, and an inner awareness of feelings
Explanation:
i took the test and got it right, midterms baby
An aspect of consciousness characterized by a certain physical arousal involving facial and bodily changes, brain activation, and tendencies toward action, all shaped by cultural rules is the correct definition of emotion. Hence option A is correct.
What is Emotion ?Emotion is a multifaceted experience of awareness, physiological feeling, and behaviour that expresses a person's unique interpretation of an object, an occasion, or a situation.
Emotions are defined as "all those sensations that alter men's judgements and are accompanied by either pleasure or misery." Such are the opposites of wrath, sympathy, fear, and the like. A vast range of significant psychological phenomena fall under the umbrella of the concept of emotion, which is in fact diverse. When it comes to a single person, thing, or circumstance, some emotions are quite specialised. Others are highly all-encompassing, like pleasure, happiness, or melancholy. Some feelings, like a momentary flush of shame or a flash of rage, are very fleeting and scarcely conscious.
Hence option A is correct.
To know more about Emotion :
https://brainly.com/question/29912301
#SPJ3.
wo cars are moving in the same velocity.Car A has a mass of 95 kilograms while car B has a mass of 110 kilograms.How much internia does the car b have compared to car a
A penny rolls along the table for a distance of 1.3 meters. Jackie pushes it 40 centimeters further in the same direction.
How many meters total has the penny traveled?
A particle has an angular velocity vector ω whose magnitude is the angular speed of the particle and the direction represents the axis about which the particle is instantaneously rotating. The particle’s linear velocity v can be written as v = ω × r where r is the particle’s position vector.
(a) If ω is constant, show that the particle’s linear acceleration a = dv/dt can be written as a = ω(ω · r) − |ω| 2 r
(b) Suppose a particle is constrained in the x−y plane. In cylindrical coordinates r = Rˆs and is perpendicular to ω = ωˆz and ω = dφ/dt is the constant rate of rotation. Use the result from part a) to find the acceleration of this body. The result should look familiar. Draw the situation and label the position vector r, the velocity vector v and the acceleration vector a in the drawing.
Answer:
a) a = w (w. r) - r w² , b) a = - r d²φ /dt²
Explanation:
For this exercise we derive the velocity of the particle
v = w x r
a = dv / dt = d/dt (w x r)
a = dw/dt x r + w x dr/dt
a = α x r + w x v
a = α x r + w x (w x r)
In the first term alpha is in the same direction, so its vector product zero
The second term, we develop it using
A x B x C = B (A .C) - C (A. B)
we substitute
a = 0 + w (w .r) - r (w .w)
a = w (w. r) - r w²
b) x- y plane
r = R s^
w = w k^
w = dφ / dt
a = w (w. R) - R w²
w² = (dφ / dt )²
a = w (w. R) - r d²φi / dt²
since the motion is in the x -y plane and the angular velocity is in the z axis, the scalar product of two perpendicular vectors zero (w. R) = 0
a = - r d²φ /dt²
please help
a car is driven 200 km west and then 80 km southwest. what is the displacement of the car from the point of orgin (magnitude and direction)? draw a diagram.
Let's take east and west to be positive and negative, respectively, and north and south to be positive and negative, respectively. Then in terms of vectors (using ijk notation), the car first moves 200 km west,
r = (-200 km) j
then 80 km southwest,
s = (-80/√2 km) i + (-80/√2 km) j
so that its total displacement is
r + s = (-80/√2 km) i + ((-200 - 80/√2) km) j
r + s ≈ (-56.6 km) i + (-256.6 km) j
This vector has magnitude
√((-56.6 km)² + (-256.6 km)²) ≈ 262.7 km
and direction θ such that
tan(θ) = (-256.6 km) / (-56.6 km) ==> θ ≈ -102.4º
relative to east, or about 12.4º west of south.
regular exercise is positively related to wellness
Answer:
yes ( true)
Explanation:
positive effects on all the body systems.
A 580-g squirrel with a surface area of 850 cm2 falls from a 4.0-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the cross-sectional area of the squirrel can be approximated as a rectangle of width 11.0 cm and length 22 cm. Note, the squirrel may not reach terminal velocity by the time it hits the ground. Give the squirrel's terminal velocity, not it's velocity as it hits the ground.)
What will be the velocity of a 58.0-kg person hitting the ground, assuming no drag contribution in such a short distance?
Answer:
its terminal velocity is 19.70 m/s
the velocity of a 58.0-kg person hitting the ground, assuming no drag contribution in such a short distance is 8.85 m/s
Explanation:
Firstly,
given that
m = 580g = 0.58kg
Area A = 0.11 * 0.22 = 0.0242m
g = 9.8
idensity constant p = 1.21 kg/m^3
the terminal velocity of the sphere Vt is ;
Vt = √ ( 2mg / pCA)
we substitute
Vt = √ ( (2*0.58*9.8) / (1.21*1*0.0242)
Vt = √ (11.368 / 0.029282)
Vt = √ ( 388.22)
Vt = 19.70 m/s
its terminal velocity is 19.70 m/s
What will be the velocity of a 58.0-kg person hitting the ground, assuming no drag contribution in such a short distance?
The Velocity of the person is;
V2 = √ 2ax
V2 = √ ( 2 * 9.8 * 4 )
V2 = √ (78.4)
V2 = 8.85 m/s
the velocity of a 58.0-kg person hitting the ground, assuming no drag contribution in such a short distance is 8.85 m/s
difference between pulling and pushing force
Answer:
Push and pull both are forces , but the difference is in their direction at which it is applied . If the force applied in the direction of motion of the particle then we call it as push . If that force applied in the direction OPPOSITE to the motion of particle then it is termed as pull
Match the cycle with processes that they use to recycle their material.
1. carbon cycle
nitrification, denitrification, fixation, assimilation, and ammonification
2. nitrogen cycle
weathering, erosion, decomposition, and absorption
3. phosphorus cycle
photosynthesis, respiration, decomposition, and absorption
Answer:
1. carbon cycle: photosynthesis, respiration, decomposition, and absorption
2. nitrogen cycle: nitrification, denitrification, fixation, assimilation, and ammonification
3. weathering, erosion
Explanation:
i got it right in my lesson
Answer:
1. carbon cycle: photosynthesis, respiration, decomposition, and absorption
2. nitrogen cycle: nitrification, denitrification, fixation, assimilation, and ammonification
3. weathering, erosion
Explanation:
plz help plz give u brainlist
state principal of pin hole camera??
Answer:
Pinhole cameras rely on the fact that light travels in straight lines – a principle called the rectilinear theory of light. This makes the image appear upside down in the camera. ... When the shutter is opened, light shines through to imprint an image on photographic paper or film placed at the back of the camera
Explanation:
What occurs in a chemical reaction?
Products are formed from reactants by the breaking and forming of new bonds.
Reactants are formed from products by the breaking and forming of bonds.
Products are formed without chemical bonds being broken.
Reactants are formed without chemical bonds being broken.
Answer:
Products are formed from reactants by the breaking and forming of new bonds
Explanation:
In a chemical reaction, products are formed from reactants by the breaking and forming of new bonds.
Here, a chemical change takes place.
In chemical reactions, the goal is produce compounds that have stable atoms like the noble gases. To ensure this, electrons can be lost, gained or shared. This sort of interaction leads to creation of chemical bonds. The rearrangement gives rise the products in a chemical process.Answer:Products are formed from reactants by the breaking and forming of new bonds
Explanation:
As frequency increases in an electromagnetic wave, its photon energy decreases. A. True B. False
Answer:
False
Explanation:
Answer:
False
Explanation:
A P E X
Two forces, one of 50 N and the other ot 30 N, act in oppo-
site directions on a box as shown in the diagram. What is the
mass of the box if its acceleration is 4.0 m/s??
Answer:
m = 5 [kg]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces in a body must be equal to the product of mass by acceleration.
ΣF = m*a
Where:
F = force [N]
m = mass [kg]
a = acceleration = 4 [m/s^2]
Now replacing:
50 - 30 = m*(4)
m = 5 [kg]
Which is the best example of reusing?
repairing a stove instead of buying a new one
wearing a pair of pants made from cotton
buying a toy packaged in paper instead of plastic
placing a glass bottle in the recycling bin
Answer:
ITS A repairing a stove instead of buying a new one not D
Explanation:
i dont know why the dude above me has 5 stars its wrong and I got proof ;) for the future edge ppl
Answer:
A) repairing a stove instead of buying a new one
Explanation:
GOT IT RIGHT :DDD
Two particles with charges +2e and -4e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 6.09 x 10-12 m apart. What is EPEfinal - EPEinitial, which is the change in the electric potential energy?
Answer:
-2-2×6.09
-4×6.04
-24.04 answer
while you are waiting to begin a foot race , you can feel your heart rate go up . This is the _ at work.
Answer:
Sympathetic nervous system.
Explanation:
The sympathetic nervous system prepares the body for the “fight or flight” response during any potential danger. The sympathetic nervous system (SNS) increases heart rate. A faster heart rate (usually) pumps more oxygen-rich blood to the brain and lungs. This can give you the energy to run.
While you are waiting to begin a foot race, you can feel your heart race go up. This is the sympathetic nervous system at work.
Answer:
sympathetic nervous system
Explanation:
The name of the SI unit for force is the
Joule
Newton
Watt
Answer:
Newton
is the answer of si unit of force
4.5m/s convert to km/h
Answer:
16.2 [km/h]
Explanation:
To solve such problems we must use dimensional analysis.
[tex]4.5[\frac{m}{s}]*1 [\frac{km}{1000m} ]*[\frac{3600s}{1h} ][/tex]
16.2 [km/h]
