Answer:
In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.
Explanation:
Which property of a substance indicates wheaten the substance is a liquid or a solid at room temperature
Answer:
physical property
Explanation: Some substances exist as gases at room temperature (oxygen and carbon dioxide), while others, like water and mercury metal, exist as liquids.
Please please help me. I will mark you as brainliest if you’re right !
1. What happens to the period of a pendulum and the period of a spring as the
amplitude of the oscillation increases? Briefly give an explanation for this
relationship. (5 points)
Answer:
The Pendulum falls but the longer the period or the back and forth swing the greater amplitude the oscillation depends on the amplitude
Explanation:
pls guys what is the law of electrostatic
Answer:
hello
Explanation:
The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them
A car driving at 20 m/s accelerates continuously 2m/s2 for 3 seconds. What is its final velocity
Answer: V= u+ at
V= final velocity
u=initial velocity
a=acceleration
t=time taken
V= 20 + 2*3
V= 26m/s
Explanation:
What are combined vectors that go in one direction?
A. equal in magnitude
B. one-dimensional
C. two-dimensional
D. displacements
Answer:
One-dimensional
Explanation:
At time=0s, the object is at the 21.0-meter position along the roadway. Where is the object at time = 10 s?
A) 91 m
B) 70 m
C) 140 m
D) 96 m
***URGENT****calculate the work done by a crane lifting a 3.8mg ( megagrams or tonnes) load to a height of 23m. ( g= 10 m/s squared)
Thank you, :))
Answer:
874000J
Explanation:
Given parameters:
Mass = 3.8Mg = 3.8 x 10⁶g
To kilograms;
1000g = 1kg
3.8 x 10⁶g will be 3.8 x 10³kg
height = 23m
Unknown :
Work done = ?
Solution:
The work done by a body is give as;
Work done = mgh
m is the mass
g is the acceleration due to gravity
h is the height
Now insert the parameters and solve;
Work done = 3.8 x 10³ x 10 x 23 = 874000J
Select the correct answer.
Five locations are marked on the world map. Which location is most prone to hurricanes?
Answer: A
Explanation:
Location A represents the Caribbean region which is known for tourist attractions such as nice beaches. It is also known however, for devastating hurricanes.
Apart from mostly being islands, which puts them at risk of being in Hurricane paths, the Caribbean is warm and the air is moist. Hurricanes derive energy from these two things which is why Hurricanes attack the Caribbean rather frequently.
Answer:
Based off the picture the guy above showed me, the correct answer would be A
However, if you have a different map, choose the choice nearest to a body of water.
What is the difference between catastrophism and uniformitarianism
Explanation:
Catastrophism is a geological concept or ideology that was formerly in place. It suggests that the earth crust has evolved through only drastic and violent geological events.
Uniformitarianism suggests that the earth carefully evolved over a period of time and that the processes that are occurring today have occurred in times past.
Catastrophism presents a drastic and rapid evolution of the crust. Uniformitarianism takes a gradual approach to events and suggests that we can use the present to unravel the past.Getting and using energy, reproducing, and maintaining structure are _______ of life.
Maria is trying to meet her friends at the pool but construction is blocking her path from the parking lot directly to the pool. Because of this, she has to walk 20 ft. north, 35 ft. east, and then 20 ft. south to get to the pool. Find her distance and displacement.
Answer:75 ft east
Explanation:
Rose got out of bed and walked from her room to the bathroom 10 m/s in 2s. She was traveling southeast. What was her acceleration?
Answer:
Acceleration = 5m/s² Southeast
Explanation:
Given the following data;
Final velocity = 10 m/s
Time = 2secs
To find acceleration;
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.
Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.
Mathematically, acceleration is given by the equation;
[tex]Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}[/tex]
[tex]a = \frac{v - u}{t}[/tex]
Where,
a is acceleration measured in [tex]ms^{-2}[/tex]
v and u is final and initial velocity respectively, measured in [tex]ms^{-1}[/tex]
t is time measured in seconds.
We know that Initial velocity = 0m/s
Substituting into the equation, we have;
[tex]a = \frac{10 - 0}{2}[/tex]
[tex]a = \frac{10}{2}[/tex]
Acceleration = 5m/s² Southeast.
Regardless of the method used to develop a scientific explanation, what does a scientist always look for?
1Trends or patterns
2proof of hypothesis
3a mathematical equation
4something never seen before
Answer:
2proof of hypothesis
Explanation:
A scientist is always on the look out for the proof of a hypothesis so as to validate their claim.
A hypothesis presented by a scientist is a testable idea. When the hypothesis is subject to a test, results are produced in form of data. The data is then analyzed to give the meaning which is the conclusion drawn So, the goal of a scientist is to find proof of their claim. The proof can come in many different forms or formatsWhich object has more momentum?
1. Caterpillar resting on a leaf?
2. Sleeping bear?
3. Llarge butterfly in flight, flying through the air?
4. Ant walking in line?
Answer:
3. Large butterfly in flight, flying through the air?
Explanation:
Momentum is simply defined as the quantity of motion a body possess. It is mathematically given as;
Momentum = mass x velocity
The larger the mass, the larger the momentum and also the velocity
Since the large butterfly is in flight, it has the largest velocity.
A sleeping bear and resting caterpillar have no momentum because their velocity is 0
what planet are people working on so they can move there
Answer:
mars
Explanation:
just search it up
Answer:
Mars I belive
Explanation:
You are freezing juice to make your own popsicles. Describe what happens on a molecular level as the juice freezes. Be sure to us e appropriate science vocabulary in your response.
Answer:
When water freezes to form ice, the molecules would be vibrating in place rather than moving round. It is a result of a decrease in the kinetic energy of the molecules of water. It is said that the temperature and the kinetic energy of the molecules is directly proportional which means that when temperature is increased, the kinetic energy of the molecules would increase as well making the molecules move around. However for this case, when we day the system is cooled then it means the temperature is decreased which would result to the decrease of the kinetic energy of the molecules.
If mass and velocity are unknown when using de Broglie's wavelength formula, what alternative value must we have to successfully determine the wavelength
Answer:
The particle momentum, p
Explanation:
A particle's de Broglie's wavelength is an indication of the scale in length where the particle's wave-like properties are important. The symbol of de Broglie wavelength is λ or [tex]\lambda _{dB}[/tex] given as follows;
The de Broglie's wavelength formula is given as follows;
[tex]\lambda = \dfrac{h}{m \cdot v} = \dfrac{h}{p}[/tex]
Where;
λ = The wavelength of the particle in meters
v = The velocity of the particle in meters/seconds
m = The mass of the particle in kilograms
p = The momentum of the particle
h = Planck's constant = 6.626 × 10⁻³⁴ J/Hz
Therefore, the alternative value that we must have to successfully determine the wavelength if the mass and velocity are unknown, is the momentum, p of the particle.
If a person is walking along at 1.4m/s. How long will it take that person to walk one time around a high school track?
Answer:
285.7s
Explanation:
Given parameters:
Speed of the person = 1.4m/s
Unknown:
Time it takes to walk one time round the track = ?
Solution:
The circumference of the track is 400m for a standard pitch.
Now;
Speed = [tex]\frac{distance}{time}[/tex]
Time = [tex]\frac{distance }{speed }[/tex]
Now insert the parameters;
Time = [tex]\frac{400}{1.4}[/tex] = 285.7s
What occurs when air moves from an area of high pressure to an area of lower pressure
Astrology is considered a science because it is grounded in scientific research. Please select the best answer from the choices provided T
Answer:
False. Astrology is not a science.
Explanation:
Astrology is a collective term for ideas about the supposed connection between the fate of people and events on Earth and the position of the celestial bodies. It mainly concerns the places in the sky of the sun, moon and planets, which were referred to as stars in ancient times, usually against the background of the fixed stars in the Zodiac. Although astrology cannot be confirmed despite research, and scientists have long rejected the principles of astrology as pseudoscience, many people continue to practice and / or believe in it.
Answer:
False
Explanation: i got it right in edge
Hi I need help with this question (see image ).
Explanation:
a) Fixed points are the temperatures at which a thermometer is calibrated. They can refer either to the actual temperatures used for calibration, or the thermometer readings at those temperatures.
__
b) Fundamental interval is the difference between the fixed points. As with fixed points, it can refer either to the difference in actual temperature, or the difference in the corresponding thermometer readings.
Why do water molecules tend to stay together and hold their shape? Name and explain the phenomenon by which this happens
Answer:
because liquid and solid states of water possesses intermolecular force of attraction which held the molecules of water in fixed
. If an object travels at a constant velocity, how does its average velocity compare to its
instantaneous
velocity throughout the trip?
Answer:
The average velocity is equal to the instantaneous velocity
Explanation:
The average velocity, [tex]\overline v[/tex], is given as follows;
[tex]\overline v = \dfrac{\Delta y}{\Delta t}[/tex]
Where;
Δy = The change in displacement
Δt = The change in time
The instantaneous velocity is the derivative found of the position of the object's displacement with respect to time
Therefore, the instantaneous velocity, [tex]v_{inst}[/tex] = The limit of the average velocity as the change in time becomes closer to zero
[tex]v_{inst} = \lim_{t \to 0} \left (\dfrac{\Delta y}{\Delta t} \right ) = \dfrac{dy}{dx}[/tex]
When the velocity is constant, the displacement time graph is a straight line graph, and the slope of the displacement-time graph which is the same as the velocity is constant and therefore, we have;
[tex]Slope \ of \ straight \ line \ graph = \dfrac{y_2 - y_1}{t_2 - t_1} = \dfrac{\Delta y}{\Delta t}= \dfrac{dy}{dx}[/tex]
Therefore, for constant velocity, we have, [tex]\overline v[/tex] = [tex]v_{inst}[/tex] the average velocity is equal to the instantaneous velocity.
a ball rolls from x 10m to x -25m in 2.5 seconds. What was its average velocity?
Answer:
2.5=10xm is the correct one
Explanation:
Answer:
-14
Explanation:
A 240 kg crate full of bricks is pushed across a surface with an acceleration of 1.3
m/s2. If the crate travels a distance of 4.6 m, How much work is being done?
Answer:
Workdone = 1435.2N/m
Explanation:
Given the following data;
Mass = 240kg
Acceleration = 1.3m/s²
Distance = 4.6m
To find the force;
Force = mass* acceleration
Substituting into the equation, we have;
Force = 240 * 1.3
Force = 312N
Now, to find the workdone;
Workdone = force * distance
Workdone = 312 * 4.6
Workdone = 1435.2N/m
A resting state through the winter.
Adaptation: Bear sleeping in a cave during the winter months
0 A. Locomotion
B. Hibernation
C. Migration
D. Defense
Answer:
b
Explanation:
Bears hibernate in the winter
what types of forces can move an object?
A bulldozer and a Mini Cooper are involved in a head-on collision. Which one experiences a greater force
Answer:
The mini Cooper will experience the greater force
Explanation:
Generally, a bulldozer has a greater mass compared to a Mini Cooper hence when both of these vehicles interact in an head on collision the Mini Cooper will experience a greater force because the bulldozer has a greater momentum
how much time will it take for a bug to travel 55 M across the floor if it's traveling by 1.1 m / s
Answer:
The bug will take 50 seconds to travel 55 m across the floor if it's traveling by 1.1 m / s.
Explanation:
Given
Distance covered by bug = d = 55 m
The speed = s = 1.1 m/s
To determine
Time the bug will take to cover the distance = t = ?
Using the formula to determine the time the bug will take to travel 55 m across the floor if it's traveling by 1.1 m/s.
Distance = Speed x Time
d = s x t
t = d/s
t = 55/1.1
t = 50 s
Therefore, the bug will take 50 seconds to travel 55 m across the floor if it's traveling by 1.1 m / s.
HELP!! I’m DESPERATE!! 19 POINTS!!!
Which action might lead scientists to develop new explanations about the
universe?
A. Becoming familiar with the history of space exploration
O B. Speculating on whether conditions on other planets might support
life
O C. Developing new technologies designed to see farther into space
than before
D. Wondering about the present size and shape of the universe and
how it formed
c. Developing new technologies designed to see farther into space
than before
What is universe?The universe is everything including all of space, and all the matter and energy that space contains. Also it includes time itself and, of course, it includes us.
What began as a sequence one-upmanship in space-related technological advancements between the U.S. and the Soviet Union would spawn incredible progress observed in innovation to this day. The battle for dominance not only as a global superpower, but a space power, led the United States and the Soviet Union to race to put men in space and eventually on the moon.
The launch of the Soviet satellite Sputnik on Oct. 4, 1957, would place pressure on the U.S. to design technologies crafted for space exploration. This, in turn, spurred a series of innovations in technology that would have far reaching impacts beyond space.
These technologies can be seen as developments in modern healthcare, construction, and transportation. Relevant examples include medical imaging techniques, artificial limbs, water filtration systems, solar panels, firefighting equipment, shock absorbers, air purifiers, home insulation, weather resistant airplanes, infrared thermometers, and countless other vital inventions.
While all these creations help sustain essential aspects of modern life, we carry one of the largest technological advancements from the space race in our pockets today.
Therefore, Developing new technologies designed to see farther into space than before lead scientists to develop new explanations about the universe.
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