Answer: SEE EXPLANATION!
Explanation:
When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases. Part of the wave travels faster for longer causing the wave to turn. The wave is slower but the wavelength is shorter meaning frequency remains the same.
I hope this helps you!
2. Does the emphasis on safety vary for each style of vehicle? In what way?
3. Does the level of safety equipment vary with price of vehicle?
4. What effects will a vehicle’s top speed, power and acceleration likely to have on safety? Is this considered in the advertisements?
WILL MARK BRAINLIEST IF CORRECT
Answer:
Emphasis on public safety can surely reduce the risk for various groups of population
1. Proper education and training must be provided to make them aware of the risks and how they can manage those risks.
2. Proper rules and regulation must be made and strictly followed for example traffic rules so as to avoid accidents.
3. Disaster management teams should to formed to ensure minimal loss of humans and resources during any natural calamity.
4.Eradication of poverty and illiteracy should be priority so as to ensure people focus on more important issues in life rather than involve themselves in trivial things.
Explanation:
Which statements represent convection? Select two options.
A. Black asphalt gets very hot on a sunny day.
B. The movement of air in a hot-air balloon makes it rise into the sky.
C. A dark sand beach can burn the soles of your feet.
D. A spoon gets warm from sitting in a soup pot.
E. A house has high heating bills because the heat ends up in the attic.
F. A house loses heat through an exterior wall.
Answer:
-The movement of air in a hot-air balloon makes it rise into the sky.
-A house has high heating bills because the heat ends up in the attic.
please mark as brainliest
Explanation:
I got the question right
A force of 10 pounds acts north and a force of 20 pounds acts west. Find the resultant force
Answer:
oi
Explanation:
plz answer this very soon
Answer:
Im gonna say it is answer A:) Hope this helps!
Explanation:
A 6.46 kg object moving with a velocity of 5.23 m/s is struck from behind by a moving 11.77 kg object. They stick together, moving off with a mutual velocity of 17.93 m/s. What was the original velocity of the 11.77 kg object before the collision?
Answer:
is
Explanation:
e
The speed and direction in which an object is moving is called _______________.
The speed and direction in which an object is moving is called the object's velocity.
What type of potential energy is a 9 volt battery an example of?
Answer:
It is electrical potential energy
Explanation:
because any sort of battery produces energy making it electrical. I hope this helps
Answer:
Chemical Potential Energy
Explanation:
How much time will it take a truck to go from 10 m/s to 35 m/s if the truck accelerates at a constant rate of 1.7 m/s2 ?
Answer:
thank u for the happiest year of my life
In the product 6, what does the coefficient mean?
Answer: Explanation:
A number used to multiply a variable. Example: 6z means 6 times z, and "z" is a variable, so 6 is a coefficient. ... Example: In ax^2 + bx + c, "x" is a variable, and "a" and "b" are coefficients.
The bar chart shows the percentage of adults in the U.S. living with certain heart disease risk factors. Which conclusion can be drawn from the chart?
A.
About 30% of adults are living with obesity, high blood pressure, or both.
B.
Diabetes is the leading cause of heart disease among adults who have high cholesterol.
C.
Over 50% of the reporting adults are living with risk factors that can be controlled through diet and exercise.
D.
If an adult leads an inactive lifestyle, he has a 38% chance of getting heart disease.
Answer : Option C) Over 50% of the reporting adults are living with risk factors that can be controlled through diet and exercise.
Explanation : Assuming that the chart is as per the attachment in the answer. The answer will be more than 50 percent of the adults are living with the risk factors and it can be easily controlled through diet and exercise. It is an alarming signal to notice the health issues amongst the people.
If I am traveling upward in an elevator at a constant velocity, I will appear to weigh more than I normally do.
A. True
B. False
Answer:
A
Explanation:
I know that it's true
PLEASE HELP ME FAST!!
"Along with a flood of other people, they headed past the wreckage and up a nearby mountain for safety. There, they
waited the night. The next morning, news reached the group that the tsunamis were over, but everyone was asked to
evacuate while they had the chance."
When reading this paragraph aloud, where should the reader pause?
a. after "There"
b. after "flood"
c. the reader should not pause
d. the reader should pause after "There" and
Answer:
A
Explanation:
Answer:its a
Explanation:
a cell containing cyanamide is least likely to carry on the process of what transport
Answer:
Active transport
PLS HELP!!
Which correctly identifies a type of heat transfer shown in the figure above?
C = radiation
B = conduction
A = convection
A = radiation
Answer:
conduction
Explanation:
Metals are good conductors of heat .In the pic the thermal energy is conducted by the cooker and the food gets cooked.Option B is correctAnswer:
[tex] \sf B = conduction[/tex]
The equation Upper E equals StartFraction 1 Over 2 pi epsilon Subscript 0 EndFraction StartFraction q d Over z Superscript 3 EndFraction is approximation of the magnitude of the electric field of an electric dipole, at points along the dipole axis. Consider a point P on that axis at distance z = 23.00d from the dipole center (d is the separation distance between the particles of the dipole). Let Eappr be the magnitude of the field at point P as approximated by the equations below. Let Eact be the actual magnitude. What is the ratio Eappr /Eact?
Answer:
E_aprox = 1.003 E_real
Explanation:
In this exercise we are given the expression for the electric field of a dipole in the axis direction of the dipole
E_real = k 2q d / √(z² + d²)³
I think your equation has some errors.
In this case they indicate that d is the separation of the charges of the dipole
in the case of z »d this equations approximates
E_aprox = k 2q d/ z³
calculate the value for the two cases
E_real = k2q d / √[ ((23d)² + d²)³]
E_real = k2q d / d³ 12201
E_real = k2q 1/12201 d²
E_aprox = k2q d / (23.00d)³
E_aprox = k2q 1/12167 d²
the error between these quantities is
E_aprox / E_real = 12201 d² / 12167 d²
E_aprox / E_real = 1.003
E_aprox = 1.003 E_real
In the apple activity you completed which of the following is an example of a constant?
The temperature of the apple.
Where the apple is stored.
How the apple is wrapped up.
The type of apple.
Answer:
the type of apple
Explanation:
the type of apple is constant (never changes) but the temperature of the apple is not constant.
Answer:
the type of apple <3
Explanation:
Help. Please! I really need help. It’s timed, and I’m loosing points.
Answer:
I think balanced
Explanation:
because there is a 2 on each arrow
Answer I'm thinking balanced as well
Explanation:
What is an important property about the wires of a circuit?
Answer:
That they conect the curcut and porvide electricity.
Explanation:
Answer:the wires must be conducted so that they allow for electrons to flow through the material
Explanation:
Which ballet move is most similar to a track runner jumping over hurdles?
a Balancing on one leg
b Complex footwork patterns
c Straight leg dance kick
d Split leap
The diffuser in a jet engine is designed to decrease the kinetic energy of the air entering the engine compressor without any work or heat interactions. Calculate the velocity at the exit of a diffuser when air at 100kPa and 20oC enters it with a velocity of 500 m/s and the exit is 200kPa and 90oC.
Answer: 330.18m/s
Explanation:
Given data:
T1 = 20 °C
T2 = 90 °C
V = 500m/s
P1 = 100kpa
P2 = 200kpa.
Cp = 1.007kj/KgK
Solution:
Energy balance
Ein - Eout = change in Esystem.
We know
Exit velocity
V2 = (V1^2 + 2(h1 - h2)^0.5 = [V1^2 + 2Cp (T1-T2)]^0.5
input given data into the formula
V2 = [500^2 + 2 (1.007) * (20 - 90) * 1000/1 ]^0.5
V2 = 109020^0.5
V2 = 330.18m/s
Velocity at the exit is 330.18m/s
Invasive species often display a wave of advance as they colonize new areas. Mathematical models based on random dispersal and reproduction have demonstrated that the speed with which such waves move is given by the expression 2 Dr , where r is the reproductive rate of individuals and D is a parameter quantifying dispersal. Calculate v'(r), the derivative of the wave speed with respect to the reproductive rate r.
Complete Question
The complete question is shown on the first uploaded image
Answer:
The derivative is [tex]v(r)' = \sqrt{\frac{D}{r} }[/tex]
The correct option is option 1
Explanation:
From the question we are told that
The equation of the speed of the wave of invasion is [tex]v(r) = 2 \sqrt{Dr}[/tex]
=> [tex]v(r) = 2 (Dr)^{\frac{1}{2} }[/tex]
=> [tex]v(r) = 2 * D^{\frac{1}{2} } r^{\frac{1}{2} }[/tex]
Here r is the reproductive rate and the D is the parameter qualifying dispersal
Generally the derivative of this speed is mathematically represented as
[tex]v(r)' = \frac{2}{2} * D^{\frac{1}{2} } * r^{-\frac{1}{2} }[/tex]
=> [tex]v(r)' = \sqrt{\frac{D}{r} }[/tex]
This derivative of the speed represents the rate of change of the invasive speed with respect to the the reproductive rate of an individual
Solve for the resultant displacement of the two vectors: A = 2.3 km at 45 degrees B = 4.8 km at 90 degrees
Answer:
The resultant of the vector is 6.63 km
Explanation:
Given;
vector A = 2.3 km 45°
vector B = 4.8 km 90°
The vectors in the x - direction is given by;
Aₓ = 2.3 km Cos 45° = 1.6263 km
Bₓ = 4.8 km Cos 90° = 0
The sum of the vectors in x -direction is given by;
∑X = 1.6263 km + 0 = 1.6263 km
The vectors in the y - direction is given by;
Ay = 2.3 km Sin 45 = 1.6263 km
By = 4.8 km Sin 90° = 4.8 km
The sum of the vectors in y -direction is given by;
∑Y = 1.6263 km + 4.8 km = 6.4263 km
The resultant vector is given by;
R = √(X² + Y²)
R = √[(1.6263)² + (6.4263)²]
R = 6.63 km
Therefore, the resultant of the vector is 6.63 km
The resultant displacement of the two vectors A and B is 6.63 Km and this can be determined by using the given data.
Given :
The two vectors: A = 2.3 km at 45 degrees B = 4.8 km at 90 degrees.
In order to determine the resultant displacement, first, determine the vector in x-direction:
[tex]\rm A_x=2.3cos45=1.6263 \;Km[/tex]
[tex]\rm B_x=4.8cos90=0 \;Km[/tex]
Now, the sum of the vectors is given by:
[tex]\rm \sum X=1.6263+0=1.6263\;Km[/tex]
In order to determine the resultant displacement, first, determine the vector in y-direction:
[tex]\rm A_y=2.3sin45=1.6263 \;Km[/tex]
[tex]\rm B_y=4.8sin90=4.8 \;Km[/tex]
Now, the sum of the vectors is given by:
[tex]\rm \sum Y = 1.6263+4.8=6.4263[/tex]
Now, the resultant vector is given by:
[tex]\rm R = \sqrt{X^2+Y^2}[/tex]
[tex]\rm R=\sqrt{(1.6263)^2+(6.4263)^2}[/tex]
R = 6.63 Km
The resultant displacement of the two vectors A and B is 6.63 Km.
For more information, refer to the link given below:
https://brainly.com/question/16380983
Which object has a net force of –5 N down?
Answer:
y
Explanation:
i did it
The object in image [x] has a net force of -5 Newtons in the vertical direction.
What is force?In order to move a body of mass (m) with an acceleration of 'a' m/s², a force of magnitude equal to the product of body's mass and the required acceleration is needed. Mathematically -
F = ma
It is a vector quantity. In a three dimensional coordinate, the force vector can be resolved as -
[F] = F[x] a[x] + F[y] a[y] + F[z] a[z]
[F] = m {A[x] a[x] + A[y] a[y] + A[z] a[z]}
We have free - body diagrams as shown in the image.
If we observe image [x], we can easy calculate that -
The force along the horizontal F[h] = 15 - 15 = 0
The force along the vertical F[v] = 20 - 25 = - 5 Newtons
Therefore, the object in image [x] has a net force of -5 Newtons in the vertical direction.
To solve more questions on force, visit the link below-
brainly.com/question/1318725
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[Refer to the image attached for full question]
A hiker walks 11 km due north from camp and then turns and walks 11 km due east. What is the total distance walked by the hiker?
Answer:
22 km
Explanation:
11km + 11km= 22km
A constant net force acts on an object. Describe the motion of the object
a) constant acceleration
B) constant speed
C) constant velocity
D) increasing acceleration
Answer:
C)constant velocity
Explanation:
it is probably corrected
what is mechanical energy
Explanation:
In physical sciences, mechanical energy is the sum of potential energy and kinetic energy. It is the macroscopic energy associated with a system. The principle of conservation of mechanical energy states that if an isolated system is subject only to conservative forces, then the mechanical energy is constant. If an object moves in the opposite direction of a conservative net force, the potential energy will increase; and if the speed (not the velocity) of the object changes, the kinetic energy of the object also changes. In all real systems, however, nonconservative forces, such as frictional forces, will be present, but if they are of negligible magnitude, the mechanical energy changes little and its conservation is a useful approximation. In elastic collisions, the kinetic energy is conserved, but in inelastic collisions some mechanical energy may be converted into thermal energy. The equivalence between lost mechanical energy (dissipation) and an increase in temperature was discovered by James Prescott Joule.
A toy car, initially travelling in a straight line at 30.0 cm/s, slows down with a constant linear acceleration of 3.0 cm/s2. How much time passes before the toy car comes to a halt?
Answer:
10s
Explanation:
Given parameters:
Initial velocity = 30cm/s
Acceleration = 3cm/s²
Unknown:
Time it takes for the car to come to rest = ?
Solution:
To solve this problem, we apply the right motion equation;
Our final velocity - 0
So;
V = U + at
Since the car is slowing down, it will have a negative acceleration
Insert the parameters and solve;
0 = 30 + (-3) x t
-30 = -t
t = 10s
A 15 kilogram mass is traveling with a velocity of 2.7m/s. What is the object's kinetic energy?
Answer:
KE=1/2*m*v^2
KE=1/2*15*2.7^2
KE=54.675 J
Explanation:
When food is exposed to the air, it can lose electrons. The loss of electrons creates reactive molecules that work to destroy the chemical bonds in the food, causing it to spoil. What are these reactive molecules called?
Answer:
Free Radicals
Explanation:
AP3X
What type of sedimentary rock is gypsum.
Answer:
metamorpic rock
Explanation:
the rock stay near the ocen
