A girl standing 600m away from a cliff bangs two pieces of wood together and hears an echo 3.5 seconds later. Determine the speed of sound in that place
Speed = 342.86 m/s
EXPLANATION
s = v × t/2
600 m = v × 3.5 s/2
600 m × 2 = v × 3.5 s
1200 m = v × 3.5 s
v = 1200 m/3.5 s
v = 342.86 m/s
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The speed of sound in that place 342.86 m/s
What is speed of sound?
The speed of sound is defined as the distance through which a sound wave’s point, such as a compression or a rarefaction, travels per unit of time.
given
distance of cliff= 600 m
time = 3.5 seconds
speed of sound = ?
distance = speed * time
distance travelled by the sound to come back to the place where the girl was standing will be = 600 * 2 m
speed = distance / time
speed = 600 * 2 m / 3.5 seconds
speed = 1200 / 3.5 = 342.86 m/s
The speed of sound in that place 342.86 m/s
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what makes a force a vector quantity
Answer:
A vector quantity is a quantity that has both magnitude and direction.
Explanation:
It's Friday night and Skyler has been assigned the noble task of baby-sitting Casey, his 2-year old brother. He puts a crash helmet on Casey, places him in the red wagon and takes him on a stroll through the neighborhood. As Skyler starts across the street, he exerts a 52 N forward force on the wagon. There is a 24 N resistance force and the wagon and Casey have a combined weight of 304 N. Construct a free body diagram depicting the types of forces acting upon the wagon. Then determine the net force, mass and acceleration of the wagon.
Answer: It's Friday night and Skyler has been assigned the noble task of baby-sitting Casey, his 2-year old brother. He puts a crash helmet on Casey, places him in the red wagon and takes him on a stroll through the neighborhood. As Skyler starts across the street, he exerts a 52 N forward force on the wagon. There is a 24 N resistance force and the wagon and Casey have a combined weight of 304 N. Construct a free body diagram depicting the types of forces acting upon the wagon. Then determine the net force, mass and acceleration of the wagon.
Explanation:
When Skyler exerts a force of 52 N on the wagon and there is a 24 N resistance force and the wagon and Casey have a combined weight of 304 N then Net force, mass and acceleration of the wagon will be 305.2 N, 31.02kg and 0.9 m/s² resp.
What is Force ?Force is responsible for the motion of an object. it produces acceleration in the body. According to newton's second law force is mass times acceleration i.e. F =ma. Its SI unit is N which is equivalent to kg.m/s². There are two types of forces, balanced force and unbalanced force. when net force acting on body is zero then it is called as balanced force and net force on the body is non zero then it is called as unbalanced force. unbalanced force are responsible for the motion of the body.
in this problem, Skyler is applying 52 N force to a wagon, there is resistance of 24N of force. Combined Wight is 304 N is directed downwards. a vector diagram is shown in the figure which gives the Net force.
the resultant force between resistance and applied force
F = 52 - 24 = 28N... means total of 28N of actual force is applied on the wagon in x direction.
There is downward force as weight, hence magnitude of net force acting on the wagon is.
F²(net) = F₁²+F₂² + F₁F₂cosθ
θ = 90, cos 90 = 0
F²(net) = F₁²+F₂²
F²(net) = 28² + 304²
F²(net) = 93200
F (Net) = [tex]\sqrt{93200\\[/tex] = 305.2 N
To get mass and acceleration,
weight W = mg
304 = m*9.8
m = 31.02 kg mass of the wagon is 31.02kg
F = ma
28 = 31.02*a
a = 0.9 m/s²
Acceleration of the wagon is 0.9 m/s². this is forward acceleration.
Hence Net force, mass and acceleration of the wagon is 305.2 N, 31.02kg and 0.9 m/s² resp.
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Bettina was sick for several weeks, and her slow recovery has made her realize that she is not as healthy as she thought she was. She has never been fond of exercise and is intimidated at the thought of going to a gym. Walking seems manageable, and there are some hills in her neighborhood. But she knows that is not aerobic exercise. Is this a good place to start?
OPTIONS:
A.
No, walking is neither aerobic nor anaerobic exercise.
B.
No, exercise that is not aerobic never does much good.
C.
Yes, but she will not have any health benefits unless she escalates it.
D.
Yes, she can slowly improve her capacity and move to aerobic exercise later.
Yes. Walking the hills in her neighborhood is a wonderful place to start.
D. She can slowly improve her capacity and move to aerobic exercise later.
Yes, she can slowly improve her capacity and move to aerobic exercise later. The correct option is (D).
Even if it isn't initially aerobic, starting with walking is a wonderful place to start, especially if Bettina isn't used to exercising frequently. Walking is a low-impact activity that is simple to fit into daily life and can be used as a gentle introduction to developing a habit of physical activity.
Even while walking isn't typically thought of as an aerobic workout, it nevertheless has several health advantages, including enhancing cardiovascular health, boosting energy, lowering stress, and aiding in weight management. Bettina can eventually increase the length and intensity of her walks to make them aerobic as she steadily increases her endurance and fitness level through walking.
Hence, the correct option is (D). Yes, she can slowly improve her capacity and move to aerobic exercise later.
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You drive a car 660 m to the east, then 400 m to the north. What is the magnitude of your displacement? Using a sketch, estimate the direction of your displacement. Verify your estimate with a numerical calculation of the direction.
Explanation:
You walk 53m to the north, then you turn 60° to your right and walk another 45m. Determine the direction of your displacement vector. Express your answer as an angle relative to east.
in an electron dot diagram,the symbol for an element is used to represent
Answer:
The nucleus and all non-valence electrons.
¿Cómo
se
ajosta
o pondero un error de medicion?
Answer:
sorry do not speak Spanish so I would not be able to help you probably cannot read this but I would be happy to help you if you follow me and bake English so thank you
I NEED A 100% ACCURATE ANSWER FOR THIS QUESTION ASAP NO LINKS !!!
Answer:
B
Explanation:
Atoms of the same element but with different numbers of neutrons
are
Answer:
atoms
Explanation:
i dont know
im pretty sure it atoms
PLS HELP 15 PNTS AND BRAINLSIT FOR CORRECT ASNWER PLSSSS HELP MEEE
7. A gold bar has a volume of 4.7 cm3 and a density of 19.3 g/cm3. What is its mass? Be sure to show your work and label all units
Answer:
90.71
Explanation: Just multiply V/D=Mass
E) The displacement is always equal to the distance traveled.
You drive 6.00 km at 50.0 km/h and then another 6.00 km at 90.0 km/h.
a) What is the total distance traveled?
Answer:
you just calculate the time in the two cases then add. I decided to convert into minutes and seconds
La aceleración de un proyectil que describe una trayectoria parabólica cerca de la superficie terrestre es constante o variable
Answer:
Es una constante porque sigue funcionando y debido a la gravedad, tú tendrías que ser tú quien la detenga si está bajando en lugar de hacia arriba.
Explanation:
what force is driving the orbits positioning of the planets around the sun
Answer:
he found that a single forece known as gravity keeps the planets in their orbits around the sun gravity force that keeps planets in their orbits calculus a branch of mathmatics partially developed by Newton and used to explain his laws
Explanation:
I hope you have a nice day and please mark me(:
A car travels 500 miles east in 10 hours. What is the velocity of the car?
Show Your Work.
Do Not Forget Your Correct Units.
Answer:
50m/s
Explanation:
500/10 to find the velocity always divide
the distance bt the time
Which of the following accounts for most of an atom's mass?
A. The nucleus
B. Neutrons
C. Protons
D. Electrons
C.protons
Explanation:
sana makatulong :>
What can we say when one force
is greater than another force?
A. There is no net force.
B. There is no change in motion.
C. There is a change in motion.
D. The forces are in equilibrium.
When one force is greater than another force, we can say that there is a change in motion. The correct answer is option C: "There is a change in motion."
According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. When one force is greater than another force, the net force acting on the object is not zero. If the net force acting on an object is not zero, it will cause the object to accelerate in the direction of the larger force. This acceleration leads to a change in motion. The object may speed up, slow down, change direction, or a combination of these.
Option A, "There is no net force," is incorrect because if one force is greater than another, there is a net force acting on the object.
Option B, "There is no change in motion," is incorrect because, as explained above, a greater force leads to a change in motion.
Option D, "The forces are in equilibrium," is incorrect because if one force is greater than another, the forces are not balanced, and the object is not in equilibrium.
Therefore, the correct statement is that there is a change in motion when one force is greater than another force.
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Which term, when divided by volume, equals density?
1: distance
2: weight
3: power
4: mass
Explanation:
mass
4
4
4
4
mass
mass
mass
4
4
4
4
4
Latitude is measured from the equator in a and a direction and what's it known as
Answer:hey can you help me answer my question please.
Explanation:
why is space black if there is light coming from everywhere?
What is the magnitude momentum of a 2 kg body that moves with a speed of 3 m/s? (1 point)
A. 1.0
B. 1.5
C. 5.0
D. 6.0
Answer:
DExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question
mass = 2 kg
velocity/speed = 3 m/s
We have
momentum = 2 × 3 = 6
We have the final answer as
6 kg.m/sHope this helps you
Answer:
(Question) Which of these quantities is a vector?
(Answer) momentum
(Question) What is the representation of the momentum vector?
(Answer) an arrow
(Question) What is the formula for the momentum p?
(Answer) p=m⋅v
(Question) What happens to the total momentum in a system of two interacting objects when a net force is exerted upon the system?
(Answer) The total momentum is conserved.
(Question) What is the magnitude momentum of a 2 kg body that moves with a speed of 3 m/s?
(Answer) 6.0
Explanation:
just finished the quick check UwU
farmer joe drives a tractor for 4 hours. his tractor is pulling a heavy plow across a rocky field. over the course of 4 hours, is the plow gaining or losing energy?
Over the course of the 4 hours for which farmer Joe's tractor is pulling the heavy plow, the plow is gaining energy by virtue of its displacement --termed the Kinetic energy.
According to the question, Farmer Joe drives the tractor for 4 hours.
However, the tractor is connected to a heavy plow and is used to pull the plow across a rocky field.
The question requires that we determine if the plow is gaining or losing energy.
In the plow's state of rest, prior to when it is connected to the tractor and pulled by the tractor; the plow possess a form of energy by virtue of its position termed the Potential energy.However, the focus of the question is during the pulling action of the tractor on the plow.
As such, the plow now has a kinetic energy by virtue of its displacement..Ultimately, the plow is gaining energy as it is being pulled by the tractor and now has Kinetic energy.
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Why is water not used as a liquid in glass thermometers?
Explanation:
Because water has no uniform rate of expansion and it vaporizes easy when temperature increases that makes it difficult to read.
Is this speed, velocity or acceleration
Answer:
Speed
Explanation:
There is no other information that involves or asks about the velocity or acceleration. Since that rules out two you will be left with one only option.
does a bike have mechanical advantage that is greater than 1, equal to 1, or less than 1?
Answer:
equal to 1 i think
Explanation:
If an object starts with a velocity of 5.26 m/s
and ends with a velocity of 60.7 m/s in 15.0
seconds, what is its displacement?
Answer:
Displacement = 8.4m
Explanation:
Hope that this is helpful.
Have a great day.
[tex]v = 60.7m {s}^{ - 1} \: u \: = 5.26m {s}^{ - 1 } \: t = 15s \: \: \: \: \: \\ a \: = \frac{v - u}{t} \\ a \: = \frac{60 .7- 5.26}{15} \\ a = 3.7m {s}^{ - 28} \\ {v}^{2} = {u}^{2} + 2as \\ {60.7}^{2} = {5.26}^{2} + 2 \times 3.7 \times s \\ 60.7 =27 .7 + 2 \times 3.7s \\60.7 = 29.7 \times 3.7s \\ 60.7 - 29.7 = 3.7s \\ 31 = 3.7s \\ \frac{31}{3.7} = \frac{3.7s}{3.7} \\ s = 8.4m[/tex]
how much is the velocity of a body when it travels 600 m in 5 minutes ?
Answer:
The answer is two meter per second square
newton’s law of gravity says the gravitational force between two objects is proportional to:
Answer:
Mass of the object or earth
I have a backbone and my body is covered with smooth, moist skin. I cannot regulate my own body temperature. I lay eggs in the water to reproduce. What can you infer from the description?The organism is an invertebrate.The organism is a vertebrate and an amphibian.The organism is a vertebrate and a mammal.The organism is a vertebrate and a reptile.
A space ship cruises at a constant velocity of 33,155 km/hr for 22.5 minutes. How far does the ship travel in that
time? State your result in kilometers.
Answer:
12,433 km
Explanation:
I got this by doing 33,155 and dividing it by 60, which is km per minute, then I did 552.583333, which is km per minute and multiplied it by 22.5, which equals 12,433 km
To check this you can do 12,433 times 2, which is 45 minutes and then use 552.583333, which is per minute, and multiplying by 15, which is 15 minutes, then add
(12,433 x 2 = 24,866) add 8288.75 [15 minutes] and that gets you 33,155
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