Answer:
There are actually three, Kepler's laws that is, of planetary motion: 1) every planet's orbit is an ellipse with the Sun at a focus; 2) a line joining the Sun and a planet sweeps out equal areas in equal times; and 3) the square of a planet's orbital period is proportional to the cube of the semi-major axis of its
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.
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:
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
pls fast
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
20 N effort is used in the 20 cm long spanner to unscrew a nut , then calculate momentum to unscrew the nut .
Answer:
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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
Which of the following determines the identity of an atom?
A. atomic mass
B. mass number
C. atomic number
D. charge
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
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:
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Answer:
star
Explanation:
because that is what our sun is.
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!
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
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.
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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Answer:
supernova
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:
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 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
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.
What does this same experiment tell you about light waves? Explain the evidence that supports your claim.
Answer:
Light wave is an EM wave that can only be seen by humans New questions in Physics Engineers at the Space Centre must determine the net force needed for a rockets engine to achieve an acceleration of 70 m/s2.
Explanation:
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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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.
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.
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
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.
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
How does an atom stay intact without collapsing
Answer:
The electron cloud has a very small mass, but it makes up most of the space of the atom. The electrons have a negative charge, and the protons have a positive charge. Due to the charges in the atom, that is how the atom stays together, by attraction of the electric charges present in the atom.
Answer:
The electron cloud has a very small mass, but it makes up most of the space of the atom. The electrons have a negative charge, and the protons have a positive charge. Due to the charges in the atom, that is how the atom stays together, by attraction of the electric charges present in the atom.
I hope it's helpful!
1 watt is the same as the transfer of ____
joules per second. What number completes the sentence?
Answer:
1 watt is the same as the transfer of 1 joules per second.
1 watt is the same as the transfer of energy at a rate of 1 joule per second.
A watt is a unit of power, representing the amount of energy transferred or converted per unit of time. Specifically, 1 watt is equivalent to 1 joule of energy being transferred every second. It is a common metric used to measure the rate of energy flow or work done in various systems. For example, a 100-watt light bulb converts electrical energy into light and heat at a rate of 100 joules per second. Understanding power in terms of watts helps us quantify and compare the efficiency and performance of different devices and processes.
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The map below shows locations of tectonic plates.
What is the name of Plate E?
Answer:
i think it is the pacific plate
Explanation:
I hope this helps