Answer:
A
Explanation:
a star is a bolling gas so it not a space rock
A star is not a space rock. Thus, the correct answer is option A.
What is a star?A star is a type of astronomical object that consists of a luminous spheroid of plasma held together by gravity. The Sun is the closest star to Earth. Many other stars can be seen with the bare eyes at night, but due to their great distances from Earth, they appear as fixed points of light.
Many of the brightest stars have proper names, and the most prominent stars have been classified into constellations . As previously stated, a star is a massive self-luminous celestial body of gas that shines through radiation emitted by its internal energy sources. It is not a space rock.
Therefore, a star, which is self-luminous celestial body made up of gas, is not a space rock.
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What is the evidence that an asteroid collision has happened before?
Answer:
The first clue that an asteroid had struck earth at around the same time as the mass extinction was the amount of iridium around the K-T boundary. Another clue was that they found that most animals that lived in the cretaceous died when the asteroid crashed and they found bones of animals from the cretaceous.
PLS HELP WITH THIS DENSITY QUESTIONS AND WHEN SHOWING STEPS PLS USE GRASS
Calculate the density of aluminum if you have a piece of aluminum that has a volume of 48.9 cm³.When the piece is measured it is found to have a mass of 132 g.
A small amount of copper is found to have a mass of 27 g. Calculate the density of copper if the volume of the sample is 3.0 cm³.
The volume of a piece of iron is 65 cm³. If the piece of iron has a mass of 512 g. Calculate the density of the sample of iron.
A stick of cedar wood has a mass of 1.2 kg. It has a volume of 3243 cm³ . What is the density of cedar wood?
Zinc has a density of 7.14 g/cm³. If you are given 50 g of zinc calculate the volume of the sample.
A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?
Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this Information, calculate the density of mercury.
What volume of silver metal will weigh exactly 2500.0 g. The density of silver is 10.5 g/cm³
Answer:
Explanation:
Density = mass/volume
132g/(48.9 cm³) = 2.7 g/cm³
(27 g)/(3 cm³) = 9 g/cm³
512 g/(65 cm³) = 7.9 g/cm³
1.2 kg/(3243 cm³) cm³ = 1200 g/(3243 cm³) = 0.37 g/cm³
4
(a) Which arrow shows the amplitude of the wave?
(1 mark)
Answer:
hmmm, where is the image?
but still let me tell you
Explanation:
amplitude of a wave is the maximum displacement of a particle from its rest position
so the arrow should be from the middle of the wave to the top of the crest or to the bottom trough,
from the middle
okay?
hope this helps, but be sure to add the image next time
10. CALCULATE: Find the amount of power used in each of the following examples. Show your calculations. a. You use a force of 10 N to move a box 100 m in 10 seconds. b. An athlete lifting weights does 900 J of work in 1 second. C. A truck does 30,000 J of work in 15 seconds. d. A fumiture mover uses a force of 150 N to push a large trunk 5 m across the floor in 5 seconds
Answer:
please find attached pdf
Explanation:
What is the relationship between Pressure and phg
? ?.
Answer:
P=F/A =mg/A =pvg/A = pgh
Explanation:
pressure equals force per unit area.
force also equals mass ×gravity
mass can also be density ×volume
volume can also be area × height
area would cancel out the area
leaving pgh
WILL MARK BRAINLIEST
When an arrow hits its target, what type of energy will it have?
A. gravitational
B. elastic
C. mechanical
D. chemical
Answer
Mehanical energy
Please. Mark brainlist
I am not very much sure but I will give a small explanation here
A bow and arrow possesses mechanical energy. When the arrow is drawn it has potential energy and when it is released it produces a force to propel the arrow towards the aimed target, therefore giving the arrow kinetic energy. When you combine both energies it creates mechanical energy
Which compound most likely has atoms held together by covalent bonds?
A. Lithium fluoride, LiF
B. Methane, CHA
C. Sodium chloride, NaCl
D. Magnesium chloride, MgCl2
Answer:
Meth CH4
Explanation:
Breaking bad
Answer:
B, Methane CH4
Explanation:
4p3x !
On which factor does the inertia of a body depend?
Answer:
The moment of inertia depends on the following factors, The density of the material. Shape and size of the body. Axis of rotation (distribution of mass relative to the axis)
What is the power generated by a 3.7 V cell phone battery that provides 2.0 A of current?
Answer:
7.4 watt
Explanation:
Power= V× I
= 3.7×2.0= 7.40 watt
A skier, starting from rest, slides down an icy frictionless 80o incline whose vertical height is 105 m. How fast are they going when the reach the bottom?
Answer:
nadaáaaaaaaaaaaaaa aaaaaaaaaaaaaaa
Someone please help me!!! Please explain and I will mark brainliest!!!
R=10+15+30
55 is the answer to the question
Chemical changes occur as energy is transferred when molecules- - or - to form one or more new substances
Answer:
Correct options are C. As food is digested, molecule bonds are broken, allowing new molecules to form that can be used by our bodies.
D. Energy stored in organic fuels are used for heat and electricity/ When batteries are connected to a circuit, a reaction occurs inside the cell producing electrical energy.
Explanation:
The breakdown of food leads to the release of chemical energy which was first stored in food. This energy is used to drive necessary functions of the body. A series of chemical reactions are involved in the breakdown of food and changing them into useful components for the cell.
Chemical energy is stored in circuits. When the battery is connected to a circuit, the chemical energy gets transferred into electrical energy.
Answer:
change, combine
A bungee jumper is attached to a bungee cord, which acts like a spring. When the bungee jumper jumps, he oscillates in periodic motion. If losses due to friction and air resistance can be ignored, what types of energy conversions are involved in this system? A. Energy is converted between gravitational potential and elastic potential energy B. Energy is converted between kinetic and gravitational potential energy C. Energy is converted between gravitational potential, elastic potential, and kinetic energy, D. Energy is converted between kinetic and elastic potential energy.
help please!!!
estion 3
What is the velocity of a 1120 kg car that has the momentum of 53,760 kg*m/s?
mentum
Answer:
Velocity = 48 m/s
Explanation:
Given:
Mass = 1,120 kg
Momentum = 53,760 kg(m/s)
Find:
Velocity
Computation:
Velocity = Momentum / Mass
Velocity = 53,760 / 1,120
Velocity = 48 m/s
The diagram below shows a wave. The feature of the wave are labeled A, B, C, and D. Which label identifies the wavelength?
According to the given diagram, the c identifies the wavelength of the curve. Hence, option C is correct.
What is wavelength?In order to characterize waveform signals that are transmitted across wires or into space, the term "wavelength" is used to refer to the separation between two identical positions (adjacent crests) in succeeding cycles. Typically, this length in wireless systems is measured in meters (m), centimeters (cm), or millimeters (mm) (mm). When describing the wavelength of infrared (IR), visible light (UV), and gamma radiation, units of 10-9 nanometers (nm) or angstroms (10-10 m) are more usually used.
The relationship between frequency and wavelength is inverse, with frequency being the number of wave cycles per second. A signal's wavelength shortens as its frequency rises, or we may say that the relationship between wavelength and refractive index is inverse.
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Is a hockey player moving at a constant velocity across frictionless ice, balance or unbalance
Answer:
Balanced
Explanation:
An unbalanced force will cause a change in the velocity, either the speed or direction, thus if the object is moving at a constant velocity that indicates that there is no acceleration or change in velocity which means that the forces are balanced.
Leigh Ann is learning about the differences between inherited traits and learned behaviors in organisms. For example, she knows that being able to read is learned while having straight or curly hair is inherited. How does a person inherit a trait such as hair texture?
A. Through the storage of extra fat during birth
B. Through DNA that is passed from parents to offspring
C. Through the breakdown of different proteins during birth
D. Through different viruses that are passed from parents to offspring
Answer:it the letter b I was just finished with this test
Explanation:
What name is given to the process that occurs when light passes from air to water?
A radiation
B reaction
C reflection
D refraction
Answer:
Refraction
Explanation:
5. What is crystallisation ? Describe the crystallisation of copper sulphate.
it is a process in which the structure in solution is in the form of crystal. crystallization of copper sulphate refers to the process in which copper sulphate is heated at minimum temperature.
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24 How long does it take for the Earth to orbit the Sun?
A one day
B one week
C one month
D one year
Answer:
365 days
So The Final Answer is a Year
D is the answer
Explanation:
Answer:
C one month
Explanation:
How do we know when an object is in static or dynamic equilibrium?
Answer:
First Condition of Equilibrium
Explanation:
This means that both the net force and the net torque on the object must be zero. The condition Fnet=0 F net = 0 must be true for both static equilibrium, where the object's velocity is zero, and dynamic equilibrium, where the object is moving at a constant velocity.The sum of the forces on it in each direction is zero. The sum of the torques on it in each direction is zero. Its linear momentum is zero.Which one of these exercises gets your heart pumping? *
O Sitting in a chair
O Sleeping
O Swimming
O None of the Above
Answer:
swimming
Explanation:
Could someone pls help at #9?
Answer:
Substance 3 is the answer
A object covers 900 km in 10 hours, calculate the speed of the object in km/h and m/s
Answer:
Speed = 90km/h
Speed= 150m/s
Answer:
speed is the distance divided by the time
so 900/10= 90km/h
to convert into meters per second
divide by 3.6
90/3.6=25m/s
Explanation:
Which of the following is an advantage of circuit breakers over fuses.
A.) It is easier to trip a fuse.
B.) Circuits get hot.
C.) Tripped circuit breakers do not need to be replaced.
D.) Fuses need to be replaced
One of the advantage of circuit breaker over fuses is tripped circuit breakers do not need to be replaced as fuse does power is in rapid restoration with breakers.
What are circuit breakers?A circuit breaker is an electrical device similar to electrical switches designed to protect the circuit from damges created by over current or short circuit.
Circuit breakers can be operated manually or automatically for saving the electrical network and components. Fuse is another saftey device to provide protection from overcurrent. It is operating automatically and it melts when over current is passed.
Even though fuses can be easily operated and less expensive, power cannot be restored after tripping the fuse whereas, tripped circuit breakers need not be replaced and easily restore the energy as soon.
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How do two ions of the same element differ?
Answer:
In the electrons
Explanation:
The charge of ions of an element is determined by the amount of negative charged electrons are present. The protons and neutrons in the nucleus do not change.
Answer:
it is possible to use two icons in css content one below content 10px;color #99999
Rafe is placing his car on a lift to change the oil and oil filter. He needs to drive up the lift 1.5 meters and the lift raises his car 0.4 meters. What is the IMA (ideal mechanical advantage) of Rafe’s car lift?
Answer:
104 IMA
Explanation:
We all have different strengths and weaknesses. How can you support others when they are better at something than you? How can you encourage others when you are better at a skill than they are?
Answer:
Tara zombix online magandang laro to
Give reason.
1. Graph paper is used to measure the area of an irregular object.
In the Bohr model of the Hydrogen atom , the radius of the orbit from the nucleus increases with decreasing the quantum number n.
true or false?
Answer:
true
Explanation:
it is true as I guess
