Answer:
120.48hz
Explanation:
f=1/t..........
Either the wavelength, velocity, or wave period—the amount of time it takes for a wave cycle to complete—must be known. If you know the period, divide 1 by it and, if necessary, convert it to seconds. The outcome will be the frequency in Hertz.
What frequency of the sound waves?As with all waves, the relationship between the speed of sound, its frequency, and its wavelength is vw=f, where vw is the speed of sound, f is the frequency, and is the wavelength.It is necessary to know either the wavelength, the velocity, or the wave period, which is the duration of a wave cycle.
Therefore, More oscillations are produced at higher frequencies. Hertz are the frequency measurement units (Hz). Noises between 20 Hz and 20,000 Hz can be heard by those with normal hearing. Ultrasound is a term for frequencies greater than 20,000 Hz.
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How much energy would be needed for a 100kg body to escape from the earth?radius of earh=6400 km
Answer:
Energy = 6400000 Joules
Explanation:
Given the following data;
Mass = 100kg
Radius of earth = 6400 km
To find the amount of energy required by the object to escape the velocity of the earth, we would apply the Law of Conservation of Energy.
This law states that energy cannot be destroyed but can only be converted or transformed from one form to another. Therefore, the sum of the initial kinetic energy and potential energy is equal to the sum of the final kinetic energy and potential energy.
Mathematically, it is given by the formula;
Ki + Ui = Kf + Uf .......equation 1
Where;
Ki and Kf are the initial and final kinetic energy respectively.
Ui and Uf are the initial and final potential energy respectively.
At the earth surface, potential energy with respect to the radius of the earth is given by the formula;
[tex] Ui = - \frac {GM}{R} [/tex] ......equation 2.
Also, at the earth surface, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex] .......equation 3.
After escaping the earth, the object wouldn't have both kinetic and potential energy; Kf = Uf = 0
Substituting eqn 2 & 3 into eqn 1, we have;
[tex] \frac{1}{2}MV^{2} - \frac {GM}{R} = 0 [/tex]
[tex] \frac{1}{2}MV^{2} = \frac {GM}{R} [/tex]
Making "V" the subject of formula;
[tex] RMV^{2} = 2GM [/tex]
[tex] V^{2} = \frac {2GM}{RM} [/tex]
[tex] V^{2} = \frac {2G}{R} [/tex]
Therefore, energy = gmR
Energy = 10 * 100 * 6400
Energy = 6400000 Joules
Mass is a measure of the amount of
matter in a substance. Which of the
following is TRUE about mass?
A. Mass can be measured using a triple beam balance.
B. Mass and volume can be measured using a
graduated cylinder.
C. Mass and length can be measured using a ruler.
D. Mass and temperature can be measured using a
thermometer.
Answer:
A
Explanation:
Can read mass precisely, commonly reading error of +0.05g
Mass is a measure of the amount of matter in a substance. Mass can be measured using a triple beam balance. Hence option (A) is correct.
What is mass?In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force. The change caused by an applied force is smaller the more mass a body has. The kilograms serves as the unit of mass in the International System of Units (SI).
The conservation of mass principle states that no matter how an object's component pieces are rearranged, the object's overall mass remains constant. If a body splits into parts, the mass also splits into pieces, therefore the original mass is equal to the sum of the masses of the individual fragments. Alternatively, if two or more particles are combined, the mass of the resulting composite equals the total of the masses of the individual particles. This rule is not always accurate, though.
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Which of the following determines the identity of an atom?
A. atomic mass
B. mass number
C. atomic number
D. charge
How do longitudinal waves differ from transverse waves? Give examples of both.
Answer:
Explanation:
Longitudinal
The medium moves in the same direction of the wave
It acts in one dimension
The wave cannot be polarized or aligned
This wave can be produced in any medium such as gas, liquid or solid
The earthquake P wave is an example
It is made of rarefactions and compressions
Transverse
The medium is moving perpendicular to the direction of wave
It acts in two dimension
The wave can be polarized or aligned
This wave can be produced in solid and liquid’s surface
Earthquake S wave is an example
It is made of troughs and crests
So if any of ya got like, screenshots of all the answers for Edge, 2020. Lab-Kinetic Energy-student guide, That would be really helpful. If you could help me, then I will mark you brainliest. And for you trollers out there who just want the points, could you not steal them for this one? Anyways, thanks ya'll!
Answer:
has any one finished the lab yet?????
Explanation:
c) 12g/cm d) 0.2g/cm
6. A girl of mass 40kg wears heels of an area of 1cm2 in contact with the ground,
the pressure on the ground (g=9.8 m/s2)
ad Y10-4na
b) 4x104 na
c) 4 105
da 105
Explanation:
Is this ok?......I have got the answer in pascals.
RE (8
10 ms
1. What is the length of the liquid column in a barometer tube that would support an atmospheric pressure of
10,200 Nm2 if the density of the liquid is 2,600 kgm
When objects are moved further apart from each other, the force of gravity
A) increases.
B) stays the same.
C) decreases.
D) decreases at first and then increases.
Answer:
The answer to this question is C.
a ball is rolled of the edge of a table with a
horizontal relocity of 10 m/s .What will be the ball's
velocity 0.10s later?
Answer:
Approximately [tex]10\; \rm m \cdot s^{-1}[/tex] at [tex]5.6^\circ[/tex] below the horizon.
Horizontal component of velocity: [tex]10\; \rm m \cdot s^{-1}[/tex].Vertical component of velocity: [tex]0.981\; \rm m\cdot s^{-1}[/tex] (downwards.)(Assumption: air resistance on the ball is negligible; [tex]g = 9.81\; \rm m \cdot s^{-2}[/tex].)
Explanation:
Assume that the air resistance on the ball is negligible. The horizontal component of the velocity of the ball would stay the same at [tex]10\; \rm m \cdot s^{-1}[/tex] until the ball reaches the ground.
On the other hand, the vertical component of the ball would increase (downwards) at a rate of [tex]g = 9.81\; \rm m\cdot s^{-2}[/tex] (where [tex]g[/tex] is the acceleration due to gravity.) In [tex]0.1\; \rm s[/tex], the vertical component of the velocity of this ball would have increased by [tex]9.81\; \rm m \cdot s^{-2} \times 0.10\; \rm s = 0.981\; \rm m \cdot s^{-1}[/tex].
However, right after the ball rolled off the edge of the table, the vertical component of the velocity of this ball was [tex]0\; \rm m\cdot s^{-1}[/tex]. Hence, [tex]0.10\; \rm s[/tex] after the ball rolled off the table, the vertical component of the velocity of this ball would be [tex]0\; \rm m \cdot s^{-1} + 0.981\; \rm m\cdot s^{-1} = 0.981\; \rm m \cdot s^{-1}[/tex].
Calculate the magnitude of the velocity of this ball. Let [tex]v_{x}[/tex] and [tex]v_{y}[/tex] and denote the horizontal and vertical component of the velocity of this ball, respectively. The magnitude of the velocity of this ball would be [tex]\displaystyle \sqrt{{v_x}^{2} + {v_y}^{2}}[/tex].
At [tex]0.10\; \rm s[/tex] after the ball rolled off the table, [tex]v_x = 10\; \rm m \cdot s^{-1}[/tex] while [tex]v_y = 0.981\; \rm m \cdot s^{-1}[/tex]. Calculate the magnitude of the velocity of the ball at this moment:
[tex]\begin{aligned} \| v \| &= \sqrt{{v_x}^{2} + {v_y}^{2}} \\ &= \sqrt{\left(10\; \rm m \cdot s^{-1}\right)^{2} + \left(0.981\; \rm m \cdot s^{-1}\right)^{2}} \\ &\approx 10.0\; \rm m\cdot s^{-1}\end{aligned}[/tex].
Calculate the angle between the horizon and the velocity of the ball (a vector) at that moment. Let [tex]\theta[/tex] denote that angle.
[tex]\displaystyle \tan \theta = \frac{\text{rise}}{\text{run}}[/tex].
For the vector representing the velocity of this ball:
[tex]\displaystyle \tan \theta = \frac{0.981\; \rm m \cdot s^{-1}}{10\; \rm m \cdot s^{-1}} = 0.0981[/tex].
Calculate the size of this angle:
[tex]\theta = \arctan 0.0981 \approx 5.62^\circ[/tex].
Notice that the vertical component of the velocity of this ball at that moment points downwards (towards the ground.) Hence, the corresponding velocity should point below the horizon.
What resultant force would accelerate an 810kg mass at 6.7 m/s squared?
Answer:
you need to multiply them and then you have your answer eg = 810 × 6.7 = 5427kg
Resultant force would accelerate an 810 kg mass at 6.7 m/s² 5427 N
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
Given in the question,
Acceleration (a) = 6.7 m/s²
Mass (m) = 810 kg
Force (F) = ?
We know
F = M * a
F = 810 * 6.7
F = 5427 N
Resultant force would accelerate an 810 kg mass at 6.7 m/s² 5427 N
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Explain why gaps are left between railway lines
Answer:
to prevent the derailing of the train due to thermal expansion.
Answer:
Iron are good conductors of heat and electricity. Being a good conductor it expands as well as contracts with the change of temperature.When heat is applied,they expands because molecules inside the element gets excited and number of molecules inside it increases in tremendous amount,so it leads to expansion of iron. So when the temperature is lowered it comes in its normal state.
The term for this is called as thermal expansion or contraction.The gap in the joint between 2 rails is to prevent from the expansion of the iron. It is necessary ,if not there will be change in structure,it may buckle and chance of derailed is increased.
Explanation:
The gap in the joint between to rails is to compensate for the expansion of the material of rail during summer.
The metals expand or contract with the changes in temperature. The expansion or contraction depends on the coefficient of thermal expansion of the material. Based on this property of the metal, the gap in the joint of two rails is provided.
four equal charges of +3microcolumb are placed at the four corners of a square that is 40cm on a side. Find the force on any one of the charge.
Answer:
i can see your question
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Answer:
supernova
Explanation:
A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. The block weighs 1587 g. From this information, calculate the density of lead.
Answer:
11.3 g/cm^3
Explanation:
density = mass/volume
volume of rectangular prism = length * width * height
volume = (4.50 cm)(5.20 cm)(6.00 cm) = 140.4 cm^3
mass = 1587 g
density = (1587 g)/(140.4 cm^3)
density = 11.3 g/cm^3
dan is going swimming to get some exercise.which of the following is appropriate swim safety advice?
Answer:
C.
If he is pulled into a current, he should swim toward the shore at a 45-degree angle.
Explanation:
Mass of Sun
2.0 x 10^30 kg
Mass lost each second 4.3 × 10^9kg
Lifetime of the Sun left 5 x 10 ^9years
Calculate the percentage of the Sun's mass that will
be converted to energy in the remainder of its
lifetime.
Percentage of mass converted to energy =
Answer:
Percentage of mass converted to energy = 99.9 %
Explanation:
By far most of the solar system's mass is in the Sun itself: somewhere between 99.8 and 99.9 percent. The rest is split between the planets and their satellites, and the comets and asteroids and the dust and gas surrounding our star. Seen from afar (on the scale of distances between stars) the presence of the solar system would not be obvious. We would simply see a normal-looking star. Perhaps we would pick up the presence of Jupiter, which makes up two thirds or so of the solar system outside of the Sun, by mass.
If energy is used at a rate of 20.0 J/s in an electric
circuit what is the power developed
Answer:
20watts
Explanation:
Formula for calculating power is expressed as;
Power = Work done/Time
Note that the unit of workdone is Joules
Unit of Time is seconds
Hence the unit of power is Joules/seconds or J/s
Hence if the rate at which energy is used up is 20.0J/s, the power will also be 20J/s or 20watts since they have the same unit.
Science
Continental Drift is that mountain ranges in
North America line up with mountain ranges in
South America
Europe
Africa
Australia
if a circuit has 3 A of current and a 5 ohm resistor, how many volts are powering the circuit
Answer:
Given =
Current = 3 ampere
Resistance = 5 ohm
Solution =
By Ohm's Law
R = V/I
V = R x I
V = 5 x 3
V = 15 volts. Answer
1.) A projectile is launched at 32.1 m/s and 52.6 º above the horizontal. Determine the:
a.) Maximum height of the projectile.
b.) The time it takes to reach the maximum height
c.) Time of flight
d.) Range
Answer:
a.) Maximum height of the projectile. =32.5m
b.) The time it takes to reach the maximum height=2.6s
c.) Time of flight=2.6s
d.) Range=99.5m
Explanation:
Select the correct answer.
The particles in a mechanical wave are moving back and forth in the same direction the wave is traveling in. What’s the shape of the wave?
double transverse
longitudinal
oval-shaped
transverse
Answer: Longitudinal
Explanation:
What term best describes a sequence of reactions where a product causes additional reactions to occur?
Answer:
hi
Explanation:
chemical reaction: Chain reactions. Chain reactions occur in a sequence of steps, in which the product of each step is a... So-called branching chain reactions are a form of chain reaction in which the number of chain carriers increases in each propagation.
pls help its due today
What is the velocity of a cup dropped from a building if it takes 8.8 seconds for the cup to hit the ground? (Gravity = -9.8 m/s2).
Answer: vf= 86.24
Explanation:
Basic physics kinematic problem right. So we assume if this is freefall the object or cup in this case is falling with an initial speed of zero and then starts to accelerate due to the force of gravity. First lets see what equations we should use:
Imma use
d=vi+vf/2*t
d=vi*t+ 1/2*a*t^2
First I will solve for distance just to make it easier for me to use the equations.
d= 0(initial speed)*8.8s+1/2*(9.8m/s^2)(8.8)^2 or just d=1/2*(9.8m/s^2)(8.8)^2
d= 379.456
Alright lets use this info in the next equation
379.456= 0 + vf / 2 *8.8 or 379.456= vf/2 *8.8= vf= 86.24m/s
which types of landfrom would you prefer for living?why?
Answer:
Landforms affect where people build houses and communities. Many people live on plains because it is easy to travel and to farm on flat land. Other people live in valleys, which are the land between mountains or hills. The soil in valleys is good for farming.
Answer: lake
Explanation: it would almost always be cool. And cool things are inside!
Two forces are acting on an object.
One force is 6 N forward.
The other force is 8 N backward.
What is the net force acting on the object?
- 14 N forward
- 2 N backward
- 2 N forward
Answer:
8N -6N = 2N
Explanation:
opposite forces
Answer:
2N backward
Explanation:
6 - 8 = -2
because there is more force backwards than forwards
A bullet was fired from a gun. The bullet had a mass of 50g and the kinetic energy of the bullet was 25 kJ. How fast did it go?
Will give brainliest
Answer:
[tex]given \: \\ mass \: (m) = 50g \\ kinetic \: enegy \: (k.e) = 25kj \\ velocity(v) = x \\ form \\ k.e = \frac{1}{2} \times MV ^{2} \\ 25 = \frac{1}{2} \times 50 \times v {}^{2} \\ 25 = 25 \times v {}^{2} \\ v {}^{2} = \frac{25}{25} \\ v {}^{2} = 1 \\ v = \sqrt{1} \\ v = 1ms {}^{ - } [/tex]
the car it go fast with velocity 1m/s
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Answer:
star
Explanation:
because that is what our sun is.
Find the weight of an object of mass 5 kg
on
i. Surface of the earth
ii. b) Surface of the moon
Answer:
weight on earth is mg
which is 5*9.8
49 Newton
weight on moon is 1/6 th of weight on earth
1/6*49
8.166 Newton..
Answer:
1
For instance, on Earth, a 5.0-kg object weighs 49 N; on the Moon, where g is 1.67 m/s2, the object weighs 8.4 N.
2
The weight of the object on the surface of earth would be 5kg. The weight of the object on the surface of moon would be 5/6= 0.83 as the weight of any object on earth is six times than that on moon.
5 kg dog accelerates at a rate of 3 m/s2. What is the net force acting on the dog?
A. 2 N
B. 15 N
C. 8 N
D. 1.5 N
Answer:
The answer would be C. 8 N
Explanation:
The combination of all of the forces acting on an object is called the
A) total force.
B) union of forces.
C) super force.
D) net force.
Answer:
The combination of all of the forces acting on an object is called D. net force
Explanation:
