5 Select the correct answer. Which statement is true? OA. The speed of sound in air is inversely proportional to the temperature of the air. O B. The speed of sound in air is directly proportional to the temperature of the air. OC. The speed of sound in air is twice the temperature of the air. C D The speed of sound in air is not affected by the temperature of the air.
The speed of sound in air is twice the temperature of the air
Answer: The speed of sound in air is twice the temperature of the air
Explanation:
An object accelerates at 8 m/s^2 when a force of 40 Newtons is
applied to it. What is the mass of the object? (Use formula: m=Fla)
Answer:
5 kg
Explanation:
Acceleration = 8 m/s^2
Force = 40 N
Force = mass * acceleration
mass = force / acceleration
mass = 40 / 8
mass = 5 kg
what are the standard units of displacement?
Please help with this question !!!!!
Answer:
te puedo ayudar pero corazón y estrella
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What is the weight of an object a mass of 90.0kg?
Explanation:
it would be 198.4
you're welcoms
Which of the boxes on the electromagnetic spectra shown below contains all
the frequencies within the visible range?
Answer:
C.
Explanation:
C. has the box on the colors, which is the rainbow because it is the visible light we are able to see.
Answer:C
Explanation:
A 2-kg mass placed 30-cm to the left of the fulcrum is balanced by a 2-kg mass placed ______ cm to the right of the fulcrum.
Answer:
30 cm
Explanation:
0.06 or [tex]\frac{1}{15}[/tex]
What is the effort and load arm?The lever has two “arms”:
The load arm is the portion of the lever directly connected to the load.
The effort arm is the portion of the lever to which we apply the effort, or input force.
The formula of the mechanical advantage(MA) of a lever is given as
MA = load/effort.
Given,
load = 2kg , effort = 30cm
MA = [tex]\frac{2}{30}[/tex] = [tex]\frac{1}{15}[/tex]
MA = 0.06 cm
Therefore,
A 2-kg mass placed 30-cm to the left of the fulcrum is balanced by a 2-kg mass placed 0.06 cm to the right of the fulcrum.
Learn more about Fulcrum here:https://brainly.com/qu estion/16422662
#SPJ2
How do you solve the resultant force and direction.
Answer:
To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force. The direction of the resultant force is in the same direction as the larger force. A force of 5 N acts to the right, and a force of 3 N act to the left. Calculate the resultant force.Example of electrical to sound? And explain how the energy is changing forms?
microphone for example
What is the relationship between distance and sound wave return time?
An ocean wave has a frequency of 3 waves per second, and the waves are
5 meters apart. What is the speed of the wave?
Answer:
v = λf = (4 m)(3 Hz) = 12 m/s
Explanation:
Help with either I don’t understand this I know W=f*d but don’t get how it applies here
Answer:
5) Displacement = +3.125 m
Displacement is in the same direction as the force vector.
6) Force = -53.89 N
Force is in an opposite direction relative to the displacement.
Explanation:
5) We are given;
Force; F = 160 N.
Workdone; W = +500 J
Now, formula for workdone is;
W = Force × displacement
Thus, displacement = Work/force
Displacement = 500/160
Displacement = +3.125 m
Thus, displacement is in the same direction as the force vector.
6) We are given;
Displacement; d = 18 m.
Workdone; W = -970 J
Like in the first answer above,
Workdone = Force × Displacement
Thus;
Force = Workdone/Displacement
Force = -970/18
Force = -53.89 N
Since force is negative and displacement is positive, it means force is in an opposite direction relative to the displacement.
Help me plz. I'll mark brainiest
Answer:
I'm pretty sure question one is D. Anatomy and physiology
Explanation:
normally you'd have to learn about Physiology before you move on to therapy from my knowledge...
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!!! i'll give brainliest to whoever can answer this for me !!!
you have to match the letters in the picture to the list of energy types
Answer:
you have to match the letters in the picture to the list of energy types
Is Radioactive decay a way to find the relative age of a rock?
True
False
hii please help i’ll give brainliest if you give a correct answer please please hurry it’s timed
Answer:
A
Explanation:
You can rule out c and d since they make no sense but i would say a makes more since than b since your sitting on the chair your putting force on it
How does a winter jacket keep you warm while a cold winter day and Why .
Please help me
In colder weather, people usually wear coats when going outside. Coats keep us warm because of the material of the coat. Our body supplies the heat, and the material helps to trap body heat and keeps the heat from escaping into the air. This is what keeps us warm.
loop od death cause and effect
Answer:true
Explanation:
Any change in an object's velocity is caused by
A. the object's mass
B. a balanced force
C. an unbalanced force
D. the object's direction
Answer:
C. an unbalanced forceExplanation:
I hope it helps ❤❤Which method of popcorn popping transfers heat into the kernels without any direct
contact (nothing hot touched the kernels)? Explain.
Which method of popcorn popping requires the kernels to move through the heat source
in order to pop. Explain.
Describe another example of an object being heated through conduction.
Answer:
you plug in and turn on the popper, and then the hot air begins to rise in the popper while cooler air falls. As hot air circulates past the popcorn kernels and so the kernels absorb the hear
A roller coaster car is at the top of a 65.0 m Crest. If the roller coaster car has 987000 J of potential energy what is its mass
Can someone help me answer this question
In order to generate electricity from mechanical energy, one essential element needed to
transform the energy into electrical energy is
A.an insulator
B.a magnet or a magnetic field
C. a plastic sphere
D. a light bulb
B: q magnet or a magnetic field
i need help asap
The downward force of gravity causes _______ displacement of an object, but the force of gravity does not affect the ________ component of motion.
a.
negative, horizontal
c.
negative, vertical
b.
positive, vertical
d.
None of the above.
Please select the best answer from the choices provided
A
B
C
D
Answer:
The correct answer is AExplanation:
I hope it helps ❤❤
An example of a single displacement reaction is
Answer:
CL2+H2O----------->2HCL+[0]
Why was John Paul Jones's victory important in the war? His victory increased France's confidence in the skill of the Continental navy. His victory against a large warship dealt a blow to the Spanish navy. His victory against a superior British foe inspired the American troops.
Answer:
C. His victory against a superior British foe inspired the American troops.
Explanation:
John Paul Jones is considered the hero in the Revolutionary War. He is known as the Father of the US Navy.
In the Revolutionary War, Jones sided with the American colonists against the British and took hold of naval ships. In 1779, when the British warship Serapis was in conflict with the American warship Bon Homme Richard, Jones plugged the American warship with the Britisher's warship and tossed a grenade into the opponent warship. Thus when Jones was victorious in the war, this boosted the American spirits for the war.
Therefore, option C is the correct answer.
Answer:
c
Explanation:
can someone help me fill in the two boxes.
Answer:
Explanation:
I believe what you're looking for is :
Opposites
Density
Could be wrong but I think so.
hii please help i’ll give brainliest if you give a correct answer please please hurry it’s timed
Answer:
Sorry I'm wrong The person above is correct.
I tried.
Answer:
The net force on the brick is 0N and the brick remains at rest.
Explanation:
Net force = 5N - 5N
= 0N
A hiker climbs a hill 400 m high. If he weighs 50 kg
caleulate the work he does in lifting his body to the top of the hill
Answer:
20 is Solvent this is the answer u divide them
A car advertisement states that a certain car can selerate from rest to 20 m/s in 7 seconds. Find the car's average acceleration
Answer:
2.86m/s²
Explanation:
[tex]\boxed{average \: acceleration = \frac{change \: in \: velocity}{time} }[/tex]
Car's average acceleration
[tex] = \frac{20 - 0}{7} \\ = 2.86 \: m/ {s}^{2} \: (3 \: s.f.)[/tex]
The reason why the change in velocity over time is average acceleration is because we are finding the total difference in velocity and dividing it against the total duration. This means that the acceleration of the car can vary throughout the 7 seconds (may not be a constant acceleration) but on average, the car's acceleration 2.86m/s², to 3 significant figures.
Change in velocity
= v -v₀
= final velocity -initial velocity
Since the car is at rest at the beginning, the initial velocity (v₀) is 0m/s.
Answer:
Given :-Acceleration = 20 m/sTime = 7 secTo Find :-Average acceleration
Solution :-As we are already knowing that
[tex] \sf Acceleration_{Avg} [/tex] = TA/T
TA = Total acceleration
T = Time
A = 20/7
A = 2.85 m/s²
