Read the following scenario and decide if it is a hypothesis, theory or law.
John is an amateur astronomer who is in his second semester of high school physics.
Accordingly, he knows that objects in motion remain in motion and move at constant
velocity in a straight line until some force acts on them. John observes that all of the
planets in this solar system orbit the sun in approximately circular orbits. In addition,
the farther a planet is from the sun, the longer it takes for that planet to complete one
orbit. John discusses his observations with like-minded friends, who also observe and
verify what John has seen. Based on these consistent observations from many different
people, John concludes that there is gravity in outer space. Is this conclusion a
hypothesis, theory or law?
Hypothesis
Theory
Law
Answer:
this questions is capable of being answered by submitting law
(18 points) Which list places different units of matter in the correct sequence from
smallest to largest?
A. Protons, bricks, atoms, rock particles, buildings
B. Protons, atoms, bricks, rock particles, buildings
C. Protons, rock particles, atoms, bricks, buildings
D. Protons, atoms, rock particles, bricks, buildings
The units of matter in the correct sequence from smallest to largest will be Protons, atoms, rock particles, bricks, buildings. Option D is correct.
What is an atom?Atom is the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.
The atom consists of matter that may be split without releasing electrical charges.
In the nucleus, proton and the neutron is existing,the atom is the fundamental part of the particle. Many particle combines to form bricks used in the construction of building.
The units of matter in the correct sequence from smallest to largest will be Protons, atoms, rock particles, bricks, buildings.
Hence, option D is correct.
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Brian made this table to organize his notes on changes of state.
A 2-column table with 4 rows. The first column titled change of state has entries melting, freezing, deposition, condensation. The second column labeled energy change has entries gain, lose, gain, lose.
Which change of state has the wrong energy change listed?
condensation
deposition
melting
freezing
Answer:
Deposition
Explanation:
I took the quiz
Deposition is accompanied by a loss in energy as the particles become less energetic hence the entry involving deposition is wrong.
What is phase change?The term phase change simply means a change from one state of matter to another. Phase changes are often accompanied by a loss or gain in energy depending on what process occurred.
The phase change deposition is accompanied by a loss in energy as the particles become less energetic hence the entry involving deposition is wrong.
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Ariel and Jackson are playing miniature golf. Ariel's ball rolls into a long, straight upward incline with a speed of 3.054 m/s and accelerates at -0.7762 m/s/s for 1.51 seconds until it reaches the top of the incline and then continues along an elevated section. Determine the length of the incline.
Answer:
The length is [tex]s = 3.73 \ m[/tex]
Explanation:
From the question we are told that
The speed is [tex]v = 3.054 \ m/s[/tex]
The acceleration [tex]a = -0.7762 m/s^2[/tex]
The time taken is [tex]t = 1.51 \ s[/tex]
Generally from kinematics equation the length of the inclined plane is mathematically represented as
[tex]s =ut + \frac{1}{2} * at^2[/tex]
=> [tex]s = 3.054 *1.51 + \frac{1}{2} * (-0.7762) *(1.51)^2[/tex]
=> [tex]s = 3.73 \ m[/tex]
Imagine you are on an airplane. Your plane has flown from 30 degrees North to 42 degrees North. How far have you flown?
A bomber is diving towards it's target at an angle of 45 degrees below the horizontal and at a speed of 320 m/s. When the bomber is 600m above the ground, it releases its load, which then hits the target. How long will it take the bomb to reach the target?
Answer:
The time it will take the bomb to reach the target is approximately 2.402 seconds
Explanation:
The given information are;
The direction the bomber is travelling = 45° below the horizontal
The speed at which the bomber was travelling = 320 m/s
The elevation at which the bomber releases its load = 600 m
Therefore, we have;
The height at which the bomb is released, s = 600 m
The inclination of the direction of motion of the bomb = 45° below the horizontal
The magnitude of the velocity of the bomb at release = 320 m/s
The vertical component of the velocity = 320 m/s × sin(45°) = 160·√2 m/s
Therefore, the initial vertical velocity, [tex]u_v[/tex], of the bomb = 160·√2 m/s downwards
From the equation of motion, we have;
s = [tex]u_v[/tex] × t + 1/2 × g × t²
Where;
t = The time it takes the bomb to hit the target
g = The acceleration due to gravity = 9.81 m/s²
∴ 600 = 160·√2 × t + 9.81 × t²
9.81 × t² + 160·√2 × t - 600 = 0
By the quadratic formula, we have;
[tex]x = \dfrac{-b\pm \sqrt{b^{2}-4\cdot a\cdot c}}{2\cdot a}[/tex]
[tex]t = \dfrac{-160 \times \sqrt{2} \pm \sqrt{(160 \times \sqrt{2} )^{2}-4\times 9.81\times (-600)}}{2\times 9.81}[/tex]
t ≈ -25.467 seconds or t ≈ 2.402 seconds
Given that t is a natural number, we have the correct option is t ≈ 2.402 seconds
Therefore, the time it will take the bomb to reach the target ≈ 2.402 seconds.
value of mass of a body is fixed everywhere. true or false
Answer:
Mass of a body is fixed everywhere. True
Explanation:
What is mass ?Mass is the amount of matter of a body. it is a fundamental quantity. It is a dimensionless quantity.is dimensional symbol is [M].Since amount of a matter is not dependent of place or position therefore it remains same at everywhere.
Hence value of mass of a body is fixed everywhere.
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What is centripetal acceleration?
A. The acceleration of an object moving in a circular path and
directed radially toward the center of the circular orbit
B. The acceleration of an object moving in a circular path and
directed tangentially along the circular path
C. The acceleration of an object moving in a linear path and
directed in the direction of motion of the object
D. The acceleration of an object moving in a linear path and
directed in the direction opposite to the motion of the objectWhat is centripetal acceleration? (I need the answer rn)
Answer:
A
Explanation:
Because the centripetal force is always towards the radius of a circle
Energy that Is transferred from a warmer object to a cooler object is called what?
Answer:
The movement of heat from a warmer object to a cooler one is called heat transfer.
Experiment with the catapult by changing the amount of energy used to pull the spoon down. When you pull down a small amount and release the marshmallow, what happens? Record your observations. When you pull down a large amount and release the marshmallow, what happens?
Answer:
when The spoon is pulled down with a small amount of energy : short distance travelled by Marsh mallow
When the spoon is pulled down with a higher amount of energy : Long distance travelled by Marshmallow
Explanation:
when The spoon is pulled down with a small amount of energy :
After the release of the spoon the Marshmallow travels a relatively short distance because the acceleration is < mass of the mass of the Marshmallow
F = ma. hence a = F/m where a < m
When the spoon is pulled down with a higher amount of energy
After the release of the spoon the marshmallow travels a relatively long distance when compared to the application of small amount of energy
If you drop a rock from a height of 13 m, it accelerates at 9.8 m/s2 and strikes the ground 1.62882 s later. If you drop the same rock from half that height, what will be its acceleration?
You had me worried there for a second. I thought you were going to ask how much the time changes, or how much the speed changes as it hits the ground, and I was gonna skip this question and go to bed.
But the acceleration won't change. That's always 9.8 m/s². That's the acceleration of gravity on Earth. It doesn't depend on what you drop, or what its mass is, or how heavy it is, or what color it is, or how high you drop it from. The only way you can change it is to drop the rock through air or water, or on a different planet.
As you climb a mountain, the boiling point (temperature) of water:
1. decreases
2. remains at 100° C
3. increases
Answer:
1, decrease
Explanation:
At higher altitudes, air pressure is lower. When atmospheric pressure is lower, such as at a higher altitude, it takes less energy to bring water to the boiling point. Less energy means less heat, which means water will boil at a lower temperature at a higher altitude.
what is the most commmon injury in the United states
which one is deposition plz help
1. Your wet hair dries after a few minutes
2. The mirror gets fogged up when you breathe on it
3. Liquid glass cools and hardens
Deposition is when a gaseous state changes to solid state by escaping liquid state. So I think it is 3. Liquid glass cools and hardens
HELP ASAP!! BEING TIMED
What type of sphere is a cliff?
Atmosphere
Cryosphere
Geosphere
Hydrosphere
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).
Explanation:
You go on American Eagle at Six Flags. The highest drop is 44.8 meters tall. It takes you 1.49 seconds to make that drop. How fast did you go?
Given parameters:
Height = 44.8m
Time to drop = 1.49s
Unknown:
Speed of drop = ?
Solution:
The is a speed problem.
Speed is one of the physical quantities. It is designated a scalar because it has magnitude but no directional orientation.
Speed is the distance divided by time.
In this problem distance is the same as the height of the drop.
Mathematically;
Speed = [tex]\frac{distance}{time}[/tex]
So, input the parameters and solve;
Speed = [tex]\frac{44.8}{1.49}[/tex] = 30.1m/s
The drop recorded a speed of 30.1m/s
Give one specific example of matter changing one state to another
Answer:
water can change to a solid even though its a liquid
Explanation:when water freezes it turns into a solid
The ice cube floating in my sody is getting smaller and smaller.
There was a puddle of rain water on the ground by the side door this morning, but there's no puddle there now.
1 What is the main function of nucleic acids?
2 Forming much of the structure of cells
3 Providing a layer of insulation
4 Storing energy
5 Storing genetic information
Answer:
storing genetic information
D
Question 1
1. All matter is made up of extremely small particles called:
nanospecks
dust
atoms
O mass
Answer:
Atoms
Explanation:
That's what everything is made up of.
You toss a ball at 15m/s straight upward. How much time will the ball take to reach the top of its path
20m/s into km/hr20 metre
Answer:
72 [km/h]
Explanation:
To solve this conversion we need to perform a dimensional analysis, in a simple way.
[tex]20\frac{m}{s} *1\frac{km}{1000m}*60\frac{s}{1min}*60\frac{min}{1hr}\\ = 72\frac{km}{h}[/tex]
The sun and moon seem to move across the sky each day because of the earths blank on its axis
Answer:
The Earth Rotates on its axis
Explanation:
How many Joules of heat are released from a 400g piece of glass that has been
cooled from 28°C to 6°C? The specific heat for this particular type of glass is 0.664
J/gºC.
Answer:
65c
Explanation:
A woman performs 2000 J of work in order to push a cart full of groceries 50 meters. How much force did she apply to the cart?
Answer:
workdone = force x displacement
force = work done /displacement
= 2000 / 50
= 40 N .
Your backpack has a mass of 8 kg. You lift it from the ground to a height of
0.7 m. How much work is done by gravity as you lift the backpack?
A. -5.6 J
B. 54.9 J
C. -54.9 J
D. 5.6 J
Will mark brainliest!
Answer:
-54.9
Explanation:
A bar of gold has a temperature of 31°C, and a bar of aluminum has a
temperature of 27°C. Which statement explains why the bar of aluminum has
a lower temperature?
Answer:the particles that make up the aluminum bar are moving more slowly
Explanation:just did it on
A bar of gold has a temperature of 31°C, and a bar of aluminum has a
temperature of 27°C. Because the particles that make up the aluminum bar are moving more slowly.
What is Temperature ?Temperature is a physical quantity which measures hotness and coldness of a body. Temperature measures the degree of vibration of molecule in a body. Temperature is measured in centigrade (°C), Fahrenheit (°F) and Kelvin (K) in which Kelvin (K) is a SI unit of temperature.
Absolute scale of temperature means Kelvin scale of temperature. relation between Kelvin(K) and centigrade (°C), °C= K - 273.15 from equation, 273.15 K means 0 °C, which is freezing point of water (ice). when we give temperature to the body, its molecule or atom absorbs thermal energy and vibrate about their mean position.
Amplitude of vibration get increases as we go on increasing temperature and for higher temperature force of attraction between molecules gets weaker. Hence for higher temperature, due to weaken the force of attraction between molecule, solid goes into liquid state. and further increase in temperature liquid goes into gaseous state.
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an object has a mass of 14 grams and a density of 7 g/mL. When placed in water it sinks. What is the Volume of water displaced?
A 28g
B 14ml
C 98ml
D 2ml
Explanation:
D = M/V
We rearrange this equation to get V = M/D
So 14 g/7 g/mL,
the grams cancel out, and we're left with 2 mL.
D is the answer.
The volume of water displaced by the body is 2 ml.
What is volume of a body?Volume of a body is amount of space occupied by a body. As it has only magnitude (no direction), it is a scalar quantity. SI unit of volume is [tex]m^{3}[/tex].
Now, it is given that,
Mass of the object is 14 grams.
Density of the object is 7 g/ml.
So, volume of the object will be = (mass of the object)/(density of the object)
= 14 grams/(7 g/ml).
= 2 ml.
When the object is placed in water, it sinks. That's why, volume of water displaced by it is equal to the total volume of the body.
Hence, The volume of displaced water is 2 ml.
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The force of gravity increases when two objects move closer together.
True or False?
The force of gravity increases when two objects move closer together. This is true statement.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
A spring balance can be used to calculate the Force. Newton is the SI unit of force.
The force of gravity between two objects is inversely proportional to the square of the distance between them. Hence, the force of gravity increases when two objects move closer together. This is true statement.
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A raven flies south for 100 seconds of 10m/s, then flies 0.50km north in 50 seconds. What is the total distance? What is the total distance? What is the average speed? What is the average velocity
Explanation:
given that the raven flies south for
time= 10 sec
speed= 10km/s
we know that speed=distance/time
distance=speed*time
distance=10*100
distance=1000m
distance=1km
also flies
distance=0.5km = 500m
time= 50 sec
speed= distance/time
speed=500/50
speed= 10m/s
speed= 0.01km/s
The average speed of an object is defined as the distance traveled divided by the time elapsed.
average speed= (1000+500)/10+50
average speed= (1500)/60
average speed= 25m/s
average velocity= (10km/s+0.01km/s)/2= 10.01/2= 5.005km/s
A glacier advances at 3.7 × 10^−6 cm/s. How far will it move in 89000 s? Answer in units of cm.^
[tex]v = 3.7 \times {10}^{ - 6} \: \: \frac{cm}{s} [/tex]
[tex]3.7 \times {10}^{ - 6} = \frac{x}{89000} \\ [/tex]
Multiply sides by 89000
[tex]3.7 \times {10}^{ - 6} \times 89 \times {10}^{3} = x [/tex]
[tex]37 \times {10}^{ - 1} \times 89 \times {10}^{ - 3} =x [/tex]
[tex]37 \times 89 \times {10}^{ - 4} = x [/tex]
[tex]x = 3293 \times {10}^{ - 4} \: \: cm [/tex]
And we're done.....♥️♥️♥️♥️♥️
