Answer:
Lantern heat of fusion.
Explanation:
The energy needed to melt a solid is know as the lantern heat of fusion.
Determine the force of gravitational attraction between the earth (m = 5.98 x 10^24kg)
and a 70-kg physics student, where the student is at a distance of 6.39 x 10^6 m from earth's
center.
Answer:
F = 683.8 N
Explanation:
The gravitational force of attraction between the Earth and the student is given by Newton's Law of Gravitation as follows:
[tex]F = \frac{Gm_{1}m_{2}}{r^2}[/tex]
where,
F = Force = ?
G = Universal gravitational constant = 6.67 x 10⁻¹¹ Nm²/kg²
m₁ = mass of Earth = 5.98 x 10²⁴ kg
m₂ = mass of student = 70 kg
r = distance between Earth and student = 6.39 x 10⁶ m
Therefore,
[tex]F = \frac{(6.67\ x\ 10^{-11}\ Nm^2/kg^1)(5.98\ x\ 10^{24}\ kg)(70\ kg)}{(6.39\ x\ 10^6\ m)^2}\\[/tex]
F = 683.8 N
What is the chemical name of SiF4? sulfur fluoride silicon fluoride sulfur tetrafluoride silicon tetrafluoride
Answer:
Silicon tetrafluoride
Explanation:
The symbol Si represents the element silicon, as shown in the periodic table.
The are 4 fluorines, so the prefix for fluoride must have tetra-
What happens to the
gravitational force between
Sal and his grandmother?
A. The gravitational force would stay the
same.
B. The gravitational force would decrease.
C. The gravitational force would increase. pls fast
aerosol can carry warnings on their labels that say not to incinerate (burn ) them or store the cans above a certain temperature. the gas in a used aerosol can is at a pressure of 103 KPA at 25 °c. if the can is thrown into a fire, what will the pressure be when the temperature reaches 928°c?
Answer:
The volume is the same apply this formula Pv=nRT shows direct proportionality this is what shows so we can take only PV=T and v stays the same.
What is the unit for resistance?
A. Ohms
B. Watts
C. Volts
D. Amperes
Answer:
The unit for resistance is ohms(Ω).
A. Ohms
Hope it will help :)
ANSWER PLEASE FAST I NEED IT
14.0.5 cm 13. wind speed surface area temperature
the body of mass 17 kg is attached to a string of length of 3.4 m is whirled round in vertical circle .if the tension in the string at the lowest point is 300N .calculate the speed of the body
Answer:
Speed of the body = 5.1652 m/s
Explanation:
Given:
Mass M = 17 kg
Length of string = 3.4 m
Tension in the string = 300N
Find:
Speed of the body
Computation:
T - mg = mv² / R... [R = L]
So,
T - mg = mv² / L
300 - 17[9.8] = [17][v]² / [3.4]
133.4 = [17][v]² / [3.4]
v² = 26.68
Speed of the body = 5.1652 m/s
If an object straight down falls 30m in 2 sec , how far will falls in 4 sec , what is the tail wind and headwind
Answer:
60 sec
Explanation:
60m because in every 30min in 2sec so 30 × 2= 60 min
Which would be the most appropriate description of how energy is distributed when a torch is turned on?
A 70% light energy, 30% thermal energy
B 70% thermal energy, 30% electrical energy
C 65% light energy, 30% thermal energy
D 40% thermal energy, 55% light energy
1) Which of the following is a form of kinetic energy?
A Motion
B Chemical
C Elastic
D Nuclear
2) The energy we receive from the sun includes:
A electrical and sound energy.
B thermal and nuclear energy.
C electrical and light energy.
D thermal and light energy.
3) The petrol needed to make a car move is a form of:
A kinetic energy.
B chemical potential energy.
C thermal (heat) energy.
D elastic potential energy.
E gravitational potential energy.
4) When a bicycle skids to a stop, its kinetic energy is mostly transformed into:
A heat and sound.
B potential energy.
C sound energy.
D heat and light.
5) The faster an object moves:
A the more potential energy it has.
B the more kinetic energy it has.
C the faster its particles vibrate.
D the cooler it gets.
6) When you clap your hands, the kinetic energy is transformed into:
A heat and light.
B heat and potential energy.
C sound and heat.
D sound and elastic potential energy.
7) When you place a metal saucepan on the heating element of a stove, heat is transferred from the element to the saucepan by:
A reflection.
B convection.
C conduction.
D radiation.
8) Which of the following can be described as being luminous :
A Streetlights (turned on)
B A road sign
C The moon
D Water
9) In the burning of fireworks during New Year displays, chemical potential energy is converted into:
A heat, light and sound energy.
B light and sound energy.
C sound and heat energy.
D gravitational potential energy and light.
Answer:
Explanation:
1) A motion
2) C Electrical and light energy
3) A kinetic energy
4) A heat and sound
5)B the more kinetic energy it has
6)C sound and heat
ope all of them are correct
What will happen if you heat a liquid to high temperatures?
Group of answer choices
A. The molecules slow down and gain more energy
B. The molecules speed up and contain less energy
C. The molecules start to slow down and contain less energy
D.The molecules speed up and gain more energy
Kinesiology is the study of:
Question 4 options:
Human movement
The study of bones.
The study of team sports.
answer is human movement
i hope this helps
Answer:
Human movement
Explanation:
Kinesiology is the study of the mechanics of body movements to provide information about the state of health of all body organs and systems.
When someone asked you if you have a special talent.
Answer:
lowkeyyyy
explanation:
Which product forms from the synthesis reaction between barium (Ba) and
oxygen (O)?
Answer:
C. BaO
Explanation:
Answer:
C. BaO
Explanation:
aPe.x
Time is a measure of:
Answer:
the time is measured with instrument such time,I hope this help
What is a force?
1. An acceleration
2. A push or pull
3.anything that has mass
4.fast velocity
Answer:
2. A push or pull
Explanation:
I'm 100% sure
State Newton's three laws of motion.
Answer:
Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass.
Newton's third law states that if an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
Explanation:
Turning on and listening your favorite TV show is an example of
heat energy to light energy
sound energy to chemical energy
electrical energy to sound energy
light energy to kinetic energy
Answer:
Electrical Energy and Sound Energy
Explanation:
Circular orbit
What is the answer? You might have to click on the picture.
Choice-B is a relevant statement, although we can't see enough of the picture to actually know what's going on.
A good example of this scenario is our own moon. Because of the Sun's gravitational influence, the Moon's orbit around the Earth is not a circle or an ellipse.
Can an object in motion ever change directions?
Answer:
Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving. Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity.
Answer these questions please and you will get the brain list
I am using the equation F=ma (force equals mass times acceleration) to solve these problems.
1. You are looking for force, and have mass and acceleration. You just plug in the values for mass and acceleration to get the force needed.
F=(15kg)(5m/s^2)
F=75N
2. Again, you are looking for force, and just need to plug in the values for mass and acceleration
F=(3kg)(2.4m/s^2)
F=7.2N
3. In this problem, you have force and mass, but need to find acceleration. To do this, you need to get acceleration alone on one side of the equation - divide each side by m. Your equation will now be F/m=a
a=(5N)/(3.7kg)
a=18.5m/s^2
I did not use significant figures. Let me know if you need to do that and need any help on that. Hope this helps!
What increase in temperature is needed to increase the length of an aluminum meterstick by 1.0 mm?
42 K
24K
Answer:
42k
Explanation:
The increase in temperature is needed to increase the length of an aluminum meter-stick by 1.0 mm is 42 K. The option 1 is the correct option.
What is thermal expansion?Thermal expansion is the property of the matter to change its shape, size, length, volume, density etc with change in the temperature.
The thermal expansion can be calculate as,
[tex]\Delta L=aL\Delta T[/tex]
Here, [tex]L[/tex] is the original length, [tex]\Delta T[/tex] is the change in the temperature and [tex]a[/tex] is the coefficient of the expansion.
Given information-
The change in the length of the aluminum mater-stick is 1.00 mm.
Let the initial size of the aluminium mater-stick is 1.00 m or 1000 mm . The thermal expansion coefficient of aluminium is [tex](2.4\times10^{-5})[/tex] per unit Kelvin.
Put the values in the above formula as,
[tex]1=(2.4\times10^{-5})\times 1000\times\Delta T[/tex]
Solve for temperature as,
[tex]\Delta T=\dfrac{1}{(2.4\times10^{-5})\times 1000} \\\Delta T=42K[/tex]
Hence the increase in temperature is needed to increase the length of an aluminum meter-stick by 1.0 mm is 42 K. The option 1 is the correct option.
Learn more about the thermal expansion here;
https://brainly.com/question/1166774
a car whose initial speed is 30 seconds m / s slows uniformly to a stop in 5.00 seconds what was the cars displacement
Answer:
60
Explanation:
the mass number is the sum of the ____ and ____ in an atom
Answer: The mass number is the sum of the number of protons and neutrons and can be used, with the atomic number, to find the number of neutrons.
Explanation:
... I don’t understand H E L P
FAST PLEASE
Which of the best describes a societal law?
A) a rule made by a government
B) a statement about how things act in the natural world
C) a statement which is always true under the same conditions
D) a statement which describes a specific relationship under given conditions
hi..
its option C..
cuz everyone is equal before the law.. and no one an be discriminated on the basis of their gender, religion, caste, race, colour or anything!..
hope it helps:)
PLEASEE HELP!!! LOTS OF POINTS AND BRAINLIEST!!!!!!!!
What is the energy requirement of an analog signal??
Answer:
Explanation:
A analog signal requires more energy but i don’t know what digital is please let me know if you found the answer
1 point
Which of the following collections of properties contain only features which can be changed by a resultant force?
The collections of properties which contain only features that can be changed by a resultant force is: speed, shape and direction.
A resultant force refers to a total effective force that has both magnitude and direction, which is mainly obtained through the addition of two (2) or more forces.
Hence, a resultant force is a single force acting on an object or physical body and it is obtained by combining two (2) or more forces.
Generally, there are some properties that changes when a resultant force is applied on them and these include:
Speed.Shape.Direction.Velocity.Read more: https://brainly.com/question/17742679
tin shear have longer handles than than the scissor used to cut cloth give reason
Answer:
For scissor, small movement at effort(at handle) should make long movement of load arm , so that it can cut longer lengths of cloth/paper. Hence blades are longer than handle.so its handle(load arm) is made longer than its blades.
Explanation:
Hope this helped Mark BRAINLEST!!
Question 7 of 10
Through which material will sound tend to travel fastest?
A. Ice
B. Steam
C. Liquid
D. Sound travels at the same speed in every material.
SUBMIT
Please help me I don’t get how to do it!!! A ray of light has a wavelength
433 nm in water (n = 1.33). What
is its wavelength in a vacuum?
(Remember, the wavelength is longer in
a vacuum.)
(Unit = nm)
Answer:
The wavelength of the light in a vacuum is 575.89 nm
Explanation:
The given parameter in the are;
The wavelength of the ray of light in water, λ₁ = 433 nm
The refractive index of water, n₁ = 1.33
The relationship between wavelength, λ, and refractive index, 'n', is presented as follows;
λ₁·n₁ = λ₂·n₂
Where;
λ₁ and λ₂ are the wavelength of the wave within the two mediums
n₁ and n₂ are the respective refractive indices of the mediums
The refractive index of vacuum, n₂ = 1
Let λ₂ represent the wavelength of light in vacuum
Therefore, we have;
1.33 × 433 nm = 1 × λ₂
∴ λ₂ = 1.33 × 433 nm/1 = 575.89 nm
Therefore, the wavelength in a vacuum, λ₂ = 575.89 nm
Answer: 576
Explanation: Its correct for acellus!