A car accelerates uniformly from rest at 3. 2 m/s2. What is the speed of the car when it has traveled a distance of 40 m?.
The final speed of the car is: (3) 16 m/s.Given the following data:Initial speed = 0 m/s (since ...
2. Air circulates in Earth’s atmosphere. What is the fundamental cause of air circulation in Earth’s atmosphere?
A. ocean currents
B. Earth’s gravity
C. energy from the sun
D. Earth’s magnetic field
Answer: C
Explanation: This pattern, called atmospheric circulation, is caused because the Sun heats the Earth more at the equator than at the poles. It's also affected by the spin of the Earth. In the tropics, near the equator, warm air rises.
What is the speed of a car which travels 45 miles in 3 hours?
Answer:
15 mph
Explanation:
45/3=15
Answer:
45
Explanation:
do the math
You are driving from Tacoma to Seattle, a distance of 34 miles (55,000m). You average a speed of 60MPH (27 m/s) on your trip. How long does it take you to get to Seattle?
You are driving from Tacoma to Seattle, a distance of 34 miles (55,000m). You average a speed of 60MPH (27 m/s) on your trip. Time taken by you to get to Seattle is 2037 sec.
According to ques , given that :
Average speed = 60 mph = 27 m/s
Total distance = 34 miles = 55000 m
The expression for average speed is given as :
Average speed = ( total distance / total time taken )
substituting the values in the formula , we get :
Total time = Total distance / Average speed
Total time = 55000 m / 27 m/s
Total time = 2037 sec
Thus, You are driving from Tacoma to Seattle, a distance of 34 miles (55,000m). You average a speed of 60MPH (27 m/s) on your trip. Time taken by you to get to Seattle is 2037 sec.
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A football player runs directly down the field for 35 m before turning to the right at
an angle of 25 from his original direction and running an additional 15 m before
getting tackled. What is the magnitude and direction of the runner's total
displacement?
The displacement is 56.54 m in size.
The displacement is moving in the direction of the line that connects the two vectors.
What is a displacement example?For instance, if an object shifts from location A to position B, its position changes. Displacement is the term used to describe this shift in an object's position.
The line that connects the beginning and final positions of the vectors is always the resultant displacement.
Formula yields the resultant vector.
AB^2 = BC^2 + 2ABBC Cos∅
the equations' values are substituted,
AC^2 = 35^2 + 15^2 x 35 15 x Cos 25' = 56.54
Consequently, the displacement's size is 56.54 m.
The displacement is moving in the direction of the line that connects the two vectors.
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what is the magnitude of the acceleration of a speck of clay on the edge of a potter's wheel turning at 50 rpm (revolutions per minute) if the wheel's diameter is 35 cm ?
The magnitude of the acceleration of a speck of clay on the edge of a potter's wheel turning at 50 rpm (revolutions per minute) if the wheel's diameter is 35 cm will be 3.89 m / s².
Magnitude is simply "distance or quantity" in the context of physics. In terms of motion, it shows the absolute or relative size, direction, or movement of an object. It is used to describe something's size or scope. Magnitude in physics typically refers to a size or quantity.
The formula we need is: A = V²/R
Centripetal acceleration = (speed)² / (radius) .
Also V = D / T Speed = (distance) / (time).
With everything in meters, kilograms, and seconds.
Circumference of the wheel = (π · diameter) = 0.35 π meters.
Speed = (0.35π m) x (45 / minute) x (1 minute / 60 sec)
= (0.35π · 45 / 60) m/sec
= 0.2625π m/sec
Any procedure where the velocity varies is referred to as acceleration. There are only two methods to accelerate because velocity is a function of both speed and direction: changing your speed, changing your direction, or changing both.
Acceleration = (speed²) / (radius)
= (0.2625π m/s)² / (0.175 m)
= (0.06890625π² / 0.175) m² / s²·m
= 3.89 m / s²
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a spaceman of mass 80 kg is sitting in a spacecraft near the surface of the earth. the spacecraft is accelerating upward at five times the acceleration due to gravity. what is the force of the spaceman on the spacecraft?
Force of the spaceman on the spacecraft is calculated to be 4800 N.
According to Newton's 3rd law, the force of the spaceman on the spacecraft is equal and opposite to the force of the spacecraft on the spaceman.
Newton's second law of motion states that : Force is equal to the rate of change of momentum or we can say that acceleration occurs when force acts on a mass. When the mass is constant, force is equal to mass times acceleration
By Newton's 2nd law,
F= m*a
Given, a= five times the acceleration due to gravity
m= 80 kg
F = Fₙ - mg = ma =m (5g)
Fₙ = 6mg
F = 6*80kg*9.8m/s² = 4800N
Force of the spaceman on the spacecraft = 4800 N.
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Through respiration, humans breathe in o2 and breathe out co2. However, what would happen if we did not breathe in o2?.
Answer:
Doing so for too much longer can decrease oxygen flow to the brain, causing fainting, seizures and brain damage. In the heart, a lack of oxygen can cause abnormalities of rhythm and affect the pumping action of the heart.
NEED HELP ASAP!! Question 2 of 5 A student studies the effect of an object's height on its amount of gravitational energy. Gravitational energy (J) Height (m) This graph summarizes the data from the study. Which statement best describes what the graph shows? A. As height increases, gravitational energy increases. B. As height increases, gravitational energy increases exponentially. C. As height increases, gravitational energy decreases exponentially. D. As height increases, gravitational energy decreases.
This graph summarizes As height increases, gravitational energy increases.
What is Gravitational potential energy and height relation ?When an object is present in a gravitational field, it has or can acquire gravitational potential energy, which is the energy that results from a change in position. Gravitational potential energy is an energy that is connected to gravitational force or gravity, to put it simply.
As force times displacement is the definition of work, greater height results in greater displacement, which increases the gravitational force's capacity to exert more force. Therefore, when distance (height) from the Earth grows, gravitational potential energy does as well.A doubling of the height will result in a doubling of the gravitational potential energy since the gravitational potential energy of an object is precisely proportional to its height above the zero point.Learn more about Gravitational potential energy here:
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A basketball with a radius of 24.1 cm rolls 8.0m in 11 seconds. What is the angular frequency of the ball?
a.
4.4 x 10-4 s-1
c.
0.48 s-1
b.
4.8 x 10-3 s-1
d.
0.96 s-1
The angular frequency of the ball is 0.48 s-1.
What is angular frequency?The term angular frequency is defined as the number of times that a rotation occurs in one second. Let us recall that the angular frequency can be obtained by the use of the formals that is given as;
ω = 2πf
ω = angular velocity
f = frequency
Using
v = rω
v = 8.0m/11 s
v = 0.72 m/s
0.72 m/s = 24.1 * 10^-2 m * ω
ω = 0.72 m/s/24.1 * 10^-2 m
ω = 2.99 rads-1
f = ω/2 * π
f = 2.99 rads-1/ 2 * 3.142
f = 0.48 s-1
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Which statements describe density? Check all that apply.
Density is a chemical property of an object.
The density of an object is constant.
Density is a derived unit of measure.
Density is the sum of the mass and volume of an object.
The density of an object determines whether it will sink or float.
The statements that describe density are the statement 3 and statement 5.
Statement 3 is correct because density does not have a SI unit. It is derived from the units of mass and volume which are kg and m³ respectively. The unity of density is km / m³. Statement 5 is correct because if an object has lower density than the liquid in which it is present, the object will float.
Statement 1 is incorrect because density is a physical property. It provides a relationship between two physical properties i.e., mass and volume. Statement 4 is incorrect because density does not remain constant. When an object is heated its density decreases. Statement 4 is incorrect because density is mass divided by volume and not the sum between those two quantities.
Therefore, the statements that describe density are the statement 3 and 5.
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Answer:its the 2, 3, and 5th statement
Explanation:
the center of a 1 kg object is located at a distance of 6.4 x 10^6 m from the center of a larger object whose mass is 6.0 x 10^24 kg what is the size of force acting on the smaller object
The size of the force acting on the smaller body is 9.8 Newtons.
We know that the gravitational force between two object is given by,
F = GMm/R²
Where f is the gravitational force,
G is the universal gravitational constant,
M is the mass of one body,
m is the mass of the other body,
R is the distance between their centres.
This gravitational force is equal on both the bodies.
So, if one of the body has a mass of 6 x 10²⁴ and other body has a mass of 1 kg and the distance between their centres is 6.4 x 10⁶ m.
The value of G is 6.674 x 10⁻¹¹
So, the force between the bodies is,
F = (6.674 x 10⁻¹¹)(1)(6.4x10²⁴)/6 x 10⁶)²
F = 9.8 N.
Hence the force acting on the smaller body is 9.8 Newtons.
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George V Coast in Antarctica is the windiest place on Earth. Wind speeds there can reach 3.00 × 102 km/h. If a research plane flies against the wind with a speed of 4.50 × 102 km/h relative to the wind, how long does it take the plane to fly between two research stations that are 250 km apart?
The time taken for the plane to fly between the two research stations at the given relative velocity is determined as 1.67 hours.
What is he relative speed of the research plane?The relative speed of the research plane is calculated by applying the following equation below.
Mathematically, the formula for relative speed is given as;
Vr = Vp - Vw
where;
Vr is the relative speed of the planeVp is the velocity of the planeVw is the velocity of the windVr = 450 km/h - 300 km/h
Vr = 150 km/h
The time taken for the plane to fly between two research stations is calculated as follows;
Distance = speed x time
time = distance / speed
time = 250 km / 150 km/h
time = 1.67 hours
Thus, the time taken for the plane to fly between the two research stations that are 250 km apart depends on the relative velocity and distance between the stations.
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Think about the jack and blake example. If you were blake, what would your reaction be and what would you have done differently?.
If one was Blake, they are bound to be surprised at the difference in their investment returns if they didn't do the math already. The differences in the results they got were due to the principles of compound interest. To do things differently would be to increase the amount invested per month and to start much earlier.
What is compound interest?
Compound interest is the adding of interest to the principal sum of a loan or deposit, or interest on interest plus interest.
When you let money collect at compound interest for an extended length of time, it grows faster than you can conceive. You may use the Rule of 72 to calculate how long it will take for your investment to double at any interest rate. Divide the interest rate by 72 to get the answer.
Compound interest accelerates the growth of your money since interest is computed on both the cumulative interest over time and the original principal. Compounding can cause a snowball effect, in which the initial investments and the income derived from those assets expand in tandem.
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Full Question:
When Jack turned 21, he decided to start investing $200 a month every year for nine years. At age 30, he decided to stop investing altogether. But his friend Blake started when Jack stopped, investing $200 a month every month starting at age 30, all the way until the ripe old age of 68.
So at age 68, who do you think had more money in their account? Let’s do the math.
At the end of nine years, Jack invested $21,600, didn’t invest another dime, and ended up with close to $2.35 million at age 68. Let’s say that again—$2.35 million! That’s the power of compound growth, friends.
And Jack’s friend Blake invested a whopping $91,200 over the course of 38 years. At age 68, he had built up $1.3 million, but he never caught up with Jack.
So how did Jack do it? He didn’t invest nearly as much as Blake did but ended up with over $1 million more. Compound growth can turn more than $20,000 invested in nine short years into almost $2.35 million over 38 years! Try our compound interest calculator which will do the calculations for you.
Question:
Think about the jack and blake example. If you were blake, what would your reaction be and what would you have done differently?.
after falling from rest from a height of m, a -kg ball rebounds upward, reaching a height of m. if the contact between ball and ground lasted ms, what average force was exerted on the ball?
An object is said to get an impulse when a force is delivered to it over a predetermined amount of time. Where J is the impulse, F is the force, and t is the time, the formula for the impulse's magnitude is:
An object's momentum will vary when it receives an impulse, as in: where m is the mass and v is the velocity.
We'll start by figuring out the ball's speed shortly before it bounced, assuming it fell 27 meters.
Next, given that the ball will climb 17 m, we determine the ball's velocity immediately following the bounce.
The impulse momentum theorem is now applied.
Consequently, the average force used .
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if the air temperature drops to 30°F during the night, how has the kinetic energy of the air particles changed
0.942 joule Kinetic Energy at 30°F during the night.
Temperature changes have no effect on the average kinetic energy value. The molecule's average kinetic energy increases with temperature.
Given how tiny this molecule is in relation to the distance between molecules, the volume of gas is primarily made up of empty space.
Gas particles move randomly (both speed and direction , as vector)
Root-mean-square averages can be used to indicate the average velocity of gases. (V rms)
[tex]v_rms=\sqrt(3RT)/(Mm)[/tex]
R = gas constant, T = temperature, Mm = molar mass of the gas particles
K.E=Kinetic energy
K.E=[tex]\frac{m}{2v^2}[/tex]
[tex]KE_2/KE_1=(271.9)/(288.56)=0.942[/tex]
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a parachute provides a 500 n upward air resistance force to a 100 kg sky walker. what is his acceleration (in m/s2) in the air?
The acceleration in the air with the resistance force is 4.8 m/s².
The acceleration depends on the force applied to the system. According to second Newton's Law, the force applied to an object will be proportional to mass and acceleration. Hence, it can be written as
F = m . a
where F is force, m is mass and a is acceleration
From the question above, we know that
Fup = 500 N
m = 100 kg
g = 9.8 m/s²
Find the total net force applied to system
F = W - Fup
F = m . g - 500
F = 100 . 9.8 - 500
F = 980 - 500
F = 480 N
Calculate the acceleration
F = m . a
480 = 100 . a
a = 4.8 m/s²
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The _____ of an object is the time derivative of _____. Equivalently, it is the second time derivative of _____.
The acceleration of an object is the time derivative of velocity. Equivalently, it is the second time derivative of displacement.
What is acceleration?The rate of change of the velocity with respect to time is known as the acceleration of the object.
The acceleration of any object = derivative of the velocity of the object with reference to the time
The velocity of any moving body = derivative of the displacement of the object with reference to the time
Thus, the acceleration of an object is the time derivative of velocity. Equivalently, it is the second time derivative of displacement.
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The students again start with spheres W, X, and Y uncharged, and sphere Z with a +40μC charge. They use metal rods to connect the spheres in a square whose sides are much greater than the diameter of the spheres. The students wear insulating gloves while handling the spheres and rods. The students predict that each sphere will now have +10μC of charge. When they measure the charge on each sphere, they find that there is only +8μC of charge on each sphere. Which of the following is the most likely cause of the difference between the students’ prediction and measurement?
Y is most likely cause of the difference between the students’ prediction and measurement because the charge of Y is +5 μC.
What is charge?Charge is defined as the fundamental feature of matter that results in a force being applied to it when it is held in an electric or magnetic field.
It can also be defined as a property of a unit of matter that explains the ratio of protons to electrons in a given unit of matter.
The charge on sphere Z, which has a positive charge of +40 C and is in touch with the other spheres (w, x, and y), will be spread equally among the spheres. Sphere Y will consequently have a charge of +5 as a result.
Thus, Y is most likely cause of the difference between the students’ prediction and measurement because the charge of Y is +5 μC.
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Which of the following scenarios would result in a more reliable scientific claim?
Testing a question multiple times and obtaining the same results.
Testing a question multiple times and obtaining different results.
Testing a question once, and having another scientist replicate your experiment.
Testing a question multiple times, and having another scientist replicate your experiment.
Testing a question multiple times and obtaining the same results. Option A.
Researchers justify their claims by reviewing the scientific literature and assessing the weight of evidence. Scientific claims are based on systematic observations and evidence. This is designed to be far more reliable than any other type of claim. One of his ways of assessing scientific credibility is to examine the logical structure of the arguments that scientists present for scrutiny.
Without drowning in this data we can determine whether the arguments are correctly related to the empirical data. Claims define the goal direction, and scope of an article. It is backed by evidence. Assertions must be discursive. A good claim is a focused argument on primary school because of the growing obesity epidemic. The bolder the claim the greater the risk. However, when conveying content that implies a claim.
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please help thanks :)
The distance travelled by the car after the first four hours of the trip is 370 km and the average speed for the first four hours of the trip is 92.5 kmph
v ( t ) = d ( t ) / t
v ( t ) = Velocity with respect to time
d ( t ) = Distance with respect to time
t = Time
For the first four hours, the following details are taken from the graph shown.
d ( 4 ) = 370 km
t = 4 hr
v ( 4 ) = 370 / 4
v ( 4 ) = 92.5 kmph
Average velocity can also be calculated using the formula V = ( u + v ) / 2 if the initial and final velocities are given. u represents initial velocity and v represents the final velocity.
Therefore,
Distance travelled in first 4 hours = 370 km
Average speed in first four hours = 92.5 kmph
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The force that friction exerts on a car is proportional to its mass. Suppose friction exerts 6,272 newtons (N) of force on a 1,600 kilogram (kg) car on a wet road. How many newtons of force would friction exert on a 2,400 kg car under the same conditions?
ANSWER:
9408 N
STEP-BY-STEP EXPLANATION:
Since they are the same conditions, the acceleration must be the same in both cases.
We calculate the acceleration, knowing that the force is equal to the mass times the acceleration, just like this:
[tex]\begin{gathered} F=m\cdot a \\ a=\frac{F}{m} \\ a=\frac{6272}{1600} \\ a=3.92m/s^2 \end{gathered}[/tex]Now, we calculate the force, applying the same formula, but with the new mass:
[tex]\begin{gathered} F=2400\cdot3.92 \\ F=9408\text{ N} \end{gathered}[/tex]The force is 9408 newtons
What are the two main differences between extrasolar planetary systems discovered to date and our solar system?.
The lack of planets in extrasolar systems is the most significant difference. The second is that relatively few of them are in an area that is conducive to living.
What is extrasolar system?
Any planetary object beyond the solar system that typically orbits a star other than the Sun is referred to as an extrasolar planet, often known as an exoplanet. Initially identified in 1992, extrasolar planets. Nearly 9,000 are awaiting additional confirmation, while more than 5,000 are known.
Interest in planetary systems derives from the potential for colonisation or possibly the emergence of life beyond what we currently understand to exist on Earth.
A first step is having planets, and thus far the systems that have been discovered do not have many. A planet must then be in an energy region that can support life as the next phase (as we know it). Earth is the only planet so far!
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How much work is done by a crane that lowers a 500.0 newtons of material a distance of 250.0 meters?
W= (500.0N)(250 m) =125000 J.
Newton is the international metric unit of force. A Newton is a force required to accelerate an object of mass 1 kilogram at 1 meter per second. Simply put, 1 newton is equivalent to 1-kilogram meter per square second. Newton is defined as 1 kg m/s2 this is a derived unit defined with respect to the SI base unit.
1 Newton is the force required to accelerate a mass of 1 kilogram at a speed of 1 meter per square second in the direction of the applied force. Mass is an intrinsic property of matter and is measured in kilograms. The mass of a bird is constant. A 15-gram bird is 15 grams, whether measured on the Earth, the Moon, or Mars. Weight is a measure of the force of gravity on a physical object and is measured in newtons.
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Electrostatic pressure derives from?
The distribution of electrical charges results in electrostatic pressure.
In the field of physics known as electrostatics, static electric charges are studied (static electricity). Some materials, like amber, have been known to capture light particles after rubbing since classical times. The word "electricity" thus derives from the Greek word for amber. Electric charges exert forces on one another, which results in electrostatic phenomena. Coulomb's law describes these forces.
The tension that builds up inside the sphere due to the charges in the same sphere repelling one another is known as electrostatic pressure. Like how a rubber band would be stretched from all points outward, stress would form in it. By maintaining electrostatic pressure and diffusion on the potassium cation, the resting membrane potential is kept constant.
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a hand lens could be used to examine a(n)
Geologists use a tiny magnifying glass to examine rocks up close. In most cases, hand lenses have a 10x magnification and fold into sturdy metal housing.
Geologists can better see the textures and structures of rocks as well as minerals and fossils within them by using magnifying glass. In order to create a magnified image of an item, a magnifying glass is a convex lens. Usually, the lens is housed in a frame with a grip. A magnifying glass can be used to concentrate light and used by geologists, such as the sun's rays to produce a hot spot at the focal for lighting a fire.
Geologists are scientists who investigate the solid, liquid, and gaseous components of the planet Earth and other.
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Scott and James work at a grocery store. After the grocery store closed,
they were playing a game with a shopping cart and Scott's skateboard.
They crashed the skateboard and the shopping cart two times. The
shopping cart had more mass in Crash 2 than it did in Crash 1. Use the
information in the diagram to answer.
In which crash did the skateboard experience a stronger force? Why?
Crash 1
Before
After
*
2 points
Strong force, a basic interaction between subatomic particles of matter in nature. Quarks are clustered together by the strong force to form more well-known subatomic particles like protons and neutrons.
Explain in which crash did the skateboard experience a strong force?The force that holds protons and neutrons in atoms' nuclei is an example of the strong nuclear force. the substances heavier than an atom of hydrogen. the core of the sun's hydrogen and helium fusion.
The four forces are the electromagnetic force, gravity, the weak nuclear force, and the strong nuclear force, in that order.
In Crash 2, skateboards are subjected to or encounter more force.
According to the statement, because the force or power applied to the cart 2 in this collision 2 was stronger or more powerful, the force or power applied to the skateboarding was also higher and greater.
Strong forces typically do more harm to particular objects or things.
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An astronaut on the moon weighs approximately 1/6 as much as on earth. How will the astronaut’s inertia change on the moon?.
On the Moon, the astronaut's inertia will not change.
The characteristic of a substance that causes that substance to be at rest or to move continuously in a straight path is known as inertia.
The amount of inertia an object has depends on its mass; the more massive the object, the more inertia it has, and the less massive the object, the less inertia it has.
The weight of an object is calculated as the sum of its mass and gravitational acceleration.
W = mg
where m is the mass of the object and g is the acceleration due to gravity
Only the weight of the astronaut will vary due to variations in the degree of acceleration caused by gravity, keeping the astronaut's mass constant.
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If a train travels 500 kilometers from Stockholm to
Copenhagen and the journey takes 5 hours, then what is the
train's average speed in kilometers per hour?
Hello,
Average speed is total distance divided by total time. From the problem, our total distance is given as 500 kilometers and given time is 5 hours. Therefore, the average speed is:
[tex]\displaystyle{v_\text{average}=\sum_{i=1}^n \dfrac{s_i}{t_i}}\\\\\displaystyle{v=\dfrac{500\ \text{km}}{5 \ \text{h}}}\\\\\displaystyle{v=100 \ \text{km/h}}[/tex]
Therefore, the average speed is 100 km/h. Please let me know if you have any questions!
a 100kg crate is set on a 30 degree ramp that possesses some friction. How much friction is required to cause the crate to stick and not slide?
Answer: 490 N
Explanation:
