Answer:
Scientific laws are facts that describe observed reoccurring natural events.
Explanation:
Scientific laws are explanations for the behavior of the natural world. Scientific theories are explanations for scientific laws.
2. If a car accelerates uniformly at a rate of
4.0 m/s2, how long will it take to reach a speed of 20
m/s, starting from rest?
Answer:
The car will take 5 seconds
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes uniformly in time.
If the object starts from a speed vo during a time t with an acceleration a, then its final speed is:
[tex]v_f=v_o+at[/tex]
The car is accelerating at a rate of a= 4~m/s^2 and reaches a speed of vf=20 m/s starting from rest (vo=0).
From the equation shown above, we solve for t:
[tex]\displaystyle t=\frac{v_f-v_o}{a}[/tex]
[tex]\displaystyle t=\frac{20-0}{4}[/tex]
[tex]\displaystyle t=\frac{20}{4}[/tex]
t = 5 seconds
The car will take 5 seconds
What was the orginal purpose of the constitutional convention and what conclusion did they quickly came to?
Two mugs are on a table. What would you need to know in order to determine which mug contains the most thermal energy?
Which statement places events during the Space Race in the correct order from the earliest to the most recent?
NASA was established, US satellite Explorer launched, first man walked on the moon, first man orbited the Earth
first man walked on the moon, first man orbited the Earth, NASA was established, US satellite Explorer launched
US satellite Explorer launched, NASA was established, first man orbited the Earth, first man walked on the moon
first man orbited the Earth, first man walked on the moon, US satellite Explorer launched, NASA was established
Answer: The correct statement order from the earliest to the most recent is (US satellite Explorer launched, NASA was established, first man orbited the Earth, first man walked on the moon.)
Explanation:
The United States first Satellite was launched in the date of February 1, 1958. It was given the name 'Explorer 1'. It was a cosmic ray detector which was constructed to measure the radiation environment in earth orbit.
NASA (National Aeronautics and Space Administration) was established in the year 1958 on the first day of October by United States of America. This was created as a response to the Soviet Union over thier first Satellite launch.
First man orbited the earth in the year 1961 on April 12. This was achieved by a Soviet Cosmonaut Yuri Alekseyevich Gagarin.
The first human on the moon is Neil Armstrong through the spacecrafts called Apollo's 11. This event occurred on 20 July 1969
The correct order from the earliest to the most recent is US satellite Explorer launched, NASA was established, first man orbited the Earth, first man walked on the moon.
The given problem recalls the historical event of Space race of US. The United States first Satellite was launched in the date of February 1, 1958. It was given the name 'Explorer 1'. It was a cosmic ray detector which was constructed to measure the radiation environment in earth orbit.
NASA (National Aeronautics and Space Administration) was established in the year 1958 on the first day of October by United States of America. This was created as a response to the Soviet Union over their first Satellite launch. First man orbited the earth in the year 1961 on April 12. This was achieved by a Soviet Cosmonaut Yuri Alekseyevich Gagarin. The first human on the moon is Neil Armstrong through the spacecrafts called Apollo's 11. This event occurred on 20 July 1969.Thus, we can conclude that the correct order of US space race is, US satellite Explorer launched, NASA was established, first man orbited the Earth, first man walked on the moon.
Learn more about the Space mission of US here:
https://brainly.com/question/10321680
Choose the answer that is not a fossil.
a. dinosaur footprints preserved in mud turned to rock
b. a 400 million year old fish preserved in rock
c. a cow skeleton in the desert
d. a petrified t-rex is found in Montana
Answer:
C. a cow skeleton in the dessert.
Explanation:
i had this question and this is how i thought it through. fossils are usually referred to as extinct animal remains. a cow is not a extinct animal and it doesn't live in the dessert so that would make it a false answer. another reason would be that the rest of the answers make sense. for answer a. it is a trace fossil, b. is a preserved fossil, d. is a petrified fossil. so that leaves c.
hope that helps :)
D. 1
1.212.52
-2
12
12
Answer:
what?
Explanation:
Kara is pushing a shopping cart to the right. The gravitational force is acting ________.
A.) upward
B.) downward
C.) to the left
D.) to the right
Answer: Gravitational force should be downwards as gravity pulls downwards.
Explanation: Dont quote me on that
Why is the process of photosynthesis important to food webs?
Answer:
to know what that specif animal or thing does in the food chain
Explanation:
Out line two application of reflactive index
Explanation:
In addition, they are used as light emitting diodes, optical waveguides, optical filters, piezoelectric devices, multimeter sensors, electron-beam pumped lasers, spintronics, quantum computing, electrophotography and photo-catalysis.
Two kids are swinging on a swing set. If one kid is larger than the other, how would it affect their kinetic and potential energy? If they both jumped off the swing, who would fly farther? Why?
Answer:
Yes it would affect the energy. the one who is smaller would fly
Explanation:
the larger kid is carring all the weight so he would have more energy on his side and the smaller kid would fly bc he lighter and has less energy on his side.
Hope this helps.
a student compared two samples of matter. he recorded the results in the chart. Sample A: Appearance: shiny and yellow. Sample B: Appearance: Dull and yellow. Which property do the two samples have in common? A. volume. B. color
Answer:
The answer are B
Explanation:the two samples haves yellow color :)
Answer:
B or 2
Explanation:
both of the samples contain a yellow color.
HURRRRRRRYYYYYYYYY
Why can the volume of a sample of plasma change when the substance is moved from one container to another?
A. Plasma is made of charged ions and electrons, so they interact differently in different places.
B. Plasma can have lots of space between its particles, so it naturally expands and compresses.
C. Plasma is made of neutral atoms that can split into separate ions and electrons when placed in a new container.
D. Plasma can change between a rigid shape and a free-moving form, so it will have different volumes in different containers.
The volume of a sample of plasma change when the substance is moved from one container to another because plasma can have lots of space between its particles, so it naturally expands and compresses.
PlasmaPlasma is one of the four states of matter.Plasma refers to a gas that exists as ions or in the ionized state.When sufficient energy has been supplied to the gas, the electrons of the gas have enough energy to escape from their atoms or molecules and the atoms then exist as ions.
Plasma contains ions and electrons that are free to.move around easily.
Matter in the plasma state do not have constant volume or shape, rather it has variable volume and shape. Plasma is the most common form of visible matter in the universe.
Examples of matter that exist in the plasma state include lightning, sparks, the sun, etc
Therefore, the volume of a sample of plasma change when the substance is moved from one container to another because plasma can have lots of space between its particles, so it naturally expands and compresses.
Learn more about plasma and states of matter at: https://brainly.com/question/11175823
Answer: Plasma can have lots of space between its particles, so it naturally expands and compresses.
Explanation:
Right on edge
Scientists observed a rock stratum with fossils. If mollusks
Answer:
scientist observed a rock stratum with fossils.if mollusks evolved before arthropod where will there fossils be found
pls help !!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
B. Identifying the types of data to be gathered
Explanation:
Identifying the types of data to be gathered is one of the part of designing a set of experimental procedure.
An experimental procedure is a methodical process that must be followed in order to attain the goal of the experiment.
As with most experiments, data is collected for further analysis and interpretation. The choice of way of collecting data and the type of data to be collected is very important when designing an experiment.a computer simulation is an example of what?
a hypothesis
a scientific law
a scientific theory
a model
A model can be a virtual OR physical representation of an object, movement, etc. A model is used to have a visual view of an item.
Hope this helps and please mark brainliest!
A rock fell of the edge of a cliff and encountered a displacement of 50m. The final vertical velocity of the rock was 10m/s. Find the time the rock was in the air, the horizontal velocity when the rock left the cliff and the vertical displacement the rock had.
Answer:
A.) 3.19s
B.) 0
C.) 55.1
Explanation:
Given that a rock fell of the edge of a cliff and encountered a displacement of 50m. The final vertical velocity of the rock was 10m/s.
To Find the
A.) time the rock was in the air,
Given that
h = 50m,
initial velocity U = 0,
acceleration due to gravity g =9.8m/s^2
Using second equation of motion:
h = Ut + 1/2gt^2
Substitute all the parameters into the equation
50 = 1/2 × 9.8 × t^2
100 = 9.8t^2
t^2 = 100/9.8
t^2 = 10.2
t = 3.19s
B.) the horizontal velocity when the rock left the cliff
The horizontal velocity is equal to zero since horizontal acceleration is zero.
C.) and the vertical displacement the rock had.
Using the third equation of motion.
V^2 = U^2 + 2gH
Where U = 0
V = 10m/s
Substitute all the parameters into the formula
10^2 = 0 + 2 × 9.8 × H
100 = 19.6H
H = 100/19.6
H = 5.1
The vertical displacement = 50 + 5.1
The vertical displacement = 55.1 m
Write a paragraph about getting to Mars using the dot points
I WILL GIVE BRAIN LIST PLS HELP
Answer:
C is corret answer okay
1- what is a machine?
2- what do we mean my "energy"
3- what are fuels?
4-how do we measure energetic change?
5- what is efficiency?
6- what kind of machines are theres
what are some examples of focus
A ball is thrown with initial velocity 20 meter per second by making an angle 30 degree with a horizontal then find time of flight.
Answer:
[tex]\huge\boxed{\sf T = 2.04\ secs}[/tex]
Explanation:
Given Data:
Initial Velocity = [tex]\sf V_{i}[/tex] = 20 m/s
Angle = [tex]\sf \theta[/tex] = 30°
Acceleration due to gravity = g = 9.8 m/s²
Required:
Time of flight = T = ?
Formula:
[tex]\sf T = \frac{2\ V_{i}\ sin\theta}{g}[/tex]
Solution:
Putting values in the above formula
T = 2(20)sin 30 / 9.8
T = 40 (0.5) / 9.8
T = 20 / 9.8
T = 2.04 secs
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AnonymousHelper1807What do the arrows at point 3 indicate?
Cool air is above water.
Warm air is above land.
Warm air is cooling quickly.
Cool air is warming quickly.
Answer:
Cool air above water
Explanation:
Bc i took the test
Answer:
ANSWER IS A. COOL AIR ABOVE WATER :)
Explanation:
BRAINLIEST PLEASE!
the flow of nutrients through an ecosystem is cyclic
Answer:
Yes
Explanation:
The flow of nutrients through ecosystem is cyclic as the nutrients move from one trophic level to another trophic level all the way up and then back down.
What do psychologists used to assist them in diagnosing abnormal behavior?
Ok so it usually includes the evaluation of symptom and disorder severity, patterns of symptoms over time number, frequency, and duration of episodes, and the patient's strengths and weaknesses.
You are driving a metric car that has a speedometer that displays in meters per second. When you look down at your speedometer, you see that it reads 23 m/s, then 7.4 s later you look down and it reads 13 m/s. What is your average acceleration over those 7.4 s?
this for my previous question.. im so sorry
Answer:
the answer for the question is C
A 12 volt battery is connected to two resistors in series. The first resistor has a resitance value of 5 Ohms and the current through the circuit is 1.5 Amps. What is the value of the second resistor?
a
9 Ohms
b
1.5 Ohms
c
5 Ohms
d
3 Ohms
Answer:
D) 3 ohms
Explanation:
According to one law
V = IR
Where V = voltage or potential difference
I =current
R =resistance
Making R the subject
R= V/I
R= 12/1.5
R=8 ohms
Sum of resistance of resistors in series equals the total resistance
R(total) = R1+ R2
8 =5+ R2
8-5=R2
3=R2
n.
What is longitudinal wave?
0.
Define transverse wave.
Longitudinal waves are those waves which move in the same direction as of the particle of the medium. That means, The Particles of the medium move forward and backward just like the Wave move forward so they propagate in the same direction.
Example:The Sound wave is the example of the longitudinal wave as it propagates in the same direction as the particle do.
_____________________________________Transverse Wave:Transverse wave are those waves which propagate in the perpendicular direction as of the particle of the medium. That means, The particle moves up and down but the wave propagate in forward direction. So they dont move in similar direction but perpendicular.
Example:Water wave is the perfect example of the transverse wave as you can see that water particles form crest(Up the midline) and trough(down the midline) i.e. upward and downward movement but the water actually moves forward in direction.
_____________________________________I have attached the picture below!_____________________________________Best Regards,'Borz'A 1.00 kg sphere M, suspended by a string from point P, is lifted to a height h. The sphere is released and passes through the lowest point in its swing at a speed of 10.0 meters per second. [Neglect friction.]
a. Calculate the height from which the sphere was released. [Show all work including equation and substitution with units]
b. Compared to the sphere’s speed through the lowest point of its swing when released from h, the sphere’s speed through the lowest point when released from 2h would be
Answer:
(a) h = 5.1 m
(b) v = 14.13 m/s
Explanation:
(a)
We will use the law of conservation of energy. For this situation it states that:
Loss in Potential Energy of Sphere = Gain in Kinetic Energy of the Sphere
mgh = (1/2)mv²
h = v²/2g --------------- equation (1)
where,
h = height = ?
v = speed at lowest point = 10 m/s
g = 9.8 m/s²
Therefore,
h = (10 m/s)²/(2)(9.8 m/s²)
h = 5.1 m
(b)
using the equation (1)
h = v²/2g
v = √2gh
where,
v = velocity = ?
g = 9.8 m/s²
h = height = 2(5.1 m) = 10.2 m
Therefore,
v = √[2(9.8 m/s²)(10.2 m)]
v = 14.13 m/s
The height from which the sphere was released is 5.1 m
When the height is doubled, the speed of the sphere becomes 14.14 m/s.
The given parameters:
Mass of the sphere, m = 1.0 kgSpeed of the sphere, v = 10 m/sThe height from which the sphere was released is calculated as follows;
[tex]P.E = K.E\\\\mgh = \frac{1}{2}mv^2\\\\gh = \frac{1}{2}v^2\\\\h = \frac{v^2}{2g}\\\\h = \frac{(10)^2}{2(9.8)} \\\\h = 5.1 \ m[/tex]
When the height is doubled, the speed of the sphere becomes;
[tex]h = \frac{v^2}{2g} \\\\v^2 = 2gh\\\\v = \sqrt{2gh} \\\\v = \sqrt{2 \times 9.8 \times (2 \times 5.1)} \\\\v = 14.14 \ m/s[/tex]
Learn more about conservation of mechanical energy here: https://brainly.com/question/6852965
Sophia was studying with Maalik about the layers of the Earth. They were given several different statements about the layers. Which statement about the layers would they identify as correct?
A-The outer core is less than 70 km in thickness.
B-The crust assists in forming Earth’s magnetic field.
C-The mantle is denser than the crust.
D- Pressure increases when moving from the core to the crust.
The statement about the layers of the Earth that both Sophia and Malik would identify as correct is: C. The mantle is denser than the crust.
Earth is one of the planets that rotates on its axis and revolves around the Sun. Also, planet Earth is the only planet known to harbor and support life.
Based on astronomical records, planet Earth comprises four (4) distinct layers starting at the center and these include:
The inner coreThe outer coreThe mantleThe crustThe mantle has a density of 4.5 [tex]g/cm^3[/tex] while the crust has a density of 2.6 [tex]g/cm^3[/tex] because temperature and pressure within planet Earth increases with depth.
In conclusion, the mantle is denser than the crust since it is made up of metals rather than solid rocks and minerals which are found within the crust.
Read more: https://brainly.com/question/11288481
Answer:
c
Explanation: