Answer:
Explanation:
KE = 1/2mv²
KE = 1/2(1.9x1027)(13)
KE = 12683.45 J
KE = 13000 J (2 sig figs)
A car is initially traveling at an unknown velocity. It accelerates constantly
for 5.0 seconds of elapsed time at a rate of 3.0 m/s² to reach a velocity of
30 m/s. What was the initial velocity of the car?
(A) 1.0 m/s
(B) 5.0 m/s
(C) 10 m/s
(D) 15 m/s
Answer: A
Explanation: No, we put the values S is 200 m and acceleration a is four m per second squared, So this gives us time to equal to 10 seconds
I hope its correct!
on a day the wind is blowing towards the south at 7 m/s, a runner jogs west at 7 m/s. what is the velocity (speed and direction) of the air relative to the runner?
Velocity is the rate of change of position of an object. The velocity of the air relative to the runner is 5√2 m/sec and it is in the southwest direction.
What is Velocity?Velocity is the directional speed of a moving object as an indicator of its rate of change in location as perceived from a certain frame of reference and measured by a specific time standard.
Given that on a day the wind is blowing towards the south at 7 m/s, a runner jogs west at 7 m/s. Therefore, the velocity of the air relative to the runner can be written as,
Relative velocity = √[(Velocity of the jogger)² + (Velocity of the air)²]
= √[(5)² + (5)²]
= √(25 + 25)
= √50
= 5√2 m/sec
The direction of the relative velocity is,
The angle of relative Velocity = Tan(θ)
Tan(θ) = Vertical velocity / Horizontal velocity
Tan(θ) = 5/5
Tan(θ) = 1
θ = tan⁻¹(1)
θ = 45°
Since this angle is formed between the two velocities, therefore, the direction of the velocity is southwest.
Hence, the velocity of the air relative to the runner is 5√2 m/sec and it is in the southwest direction.
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I use a rope 2.00 m long to swing a 10.0-kg weight around my head. The tension in the rope is 20.0 N. In half a revolution how much work is done by the rope on the weight?
According to the given assertion, the work done during half revolution also will be equal to zero.
Why is effort done inside a circle equal to zero?When a body is spun in a circle, the work done equals zero because displacement in circular motion is always perpendicular to the applied force. Also, when a body moves in a circular direction, the centripetal force works along the radius of the circle and is perpendicular to the body's motion.
What is the work-done calculation formula?The following equation can be used to determine work: Work equals Force x Distance. The joule (J) or Newton meter (N m) is the SI unit for labor. One joule is the amount of work done when one Newton of force pushes an object one meter.
Briefing:The work done by the centripetal force is always zero since force and instantaneous displacement are always perpendicular. As a result, effort done in half revolution is likewise equal to zero.
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you notice another ant beginning to walk along a meter stick. curious, you take out a stopwatch and determine the ant’s position on the meter stick. you record the following data: {(0.0 s, 0.0 m), (1.0 s, 0.12 m), (2.0 s, 0.24 m), (3.0 s, 0.36 m), (4.0 s, 0.48 m)}. determine the ant’s speed from the slope of the distance vs. time graph.
The speed of Ant is 0.12 m / s .
The given data is for Uniform Motion .
Ant ' s speed can be calculated as follows :
Speed = Distance / Time
v = s / t
s ₁ = 0.12 m
t ₁ = 1.0 sec
v ₁ = 0.12 / 1.0
v ₁ = 0.12 m / s
s ₂ = 0.24
t ₂ = 2.0 sec
v ₂ = 0.24 / 2.0
= 0.12 m / s
So , the speed of Ant is 0.12 m / s .
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Which hypothesis cannot be tested experimentally?
Question 13 options:
The average speed of air molecules increases with temperature.
Ghosts are the souls of people who have died.
The structure of any part of the broccoli is similar to the whole structure of the broccoli.
A vegetarian is less likely to be affected by night blindness.
Ghosts are the souls of people who have died cannot be tested experimentally.
An experiment is a technique used in science to create a discovery, test a theory, or show a known truth. because owing to a lack of technology, we might not be able to analyze souls.Any procedure where measurements are taken and tests are run to support or disprove a hypothesis is referred to as a scientific experiment.The scientific experiment is a component of the scientific method as a whole. This process is a series of sequential processes used to learn new information about any subject.The steps are: making a discovery. posing a query and developing a theory. scientific tests to validate the theory and gather data Analyzing the findings and making judgments presenting the findingsTo know more about experiment visit : https://brainly.com/question/9199868
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Suppose a particular spectral line has a wavelength of 500 nm in the lab. If you look at the spectrum of star A, you see this line at 480 nm. Star B exhibits this line at 510 nm, and the line is measured to be at 530 nm in star C. Which of the following statements is true?
a. Star A is moving the fastest of the three stars.
b. Star A is the only star moving away from us, star B and star C are both moving towards us (with star C moving towards us the fastest)
c. Star C is moving away from us faster than star B, star A is moving towards us.
How many seconds would it take to travel 20 miles at an average velocity of (25miles)/(hour)?
36.7 feet per second
Felix steals second base running at a speed 4.2 m/s. He slides into second base at a speed of
The resultant displacement such that Felix steals second base running at a speed 4.2 m/s and slides into second base at a speed of 5.8 m/s is 10 meters.
What is average velocity?Average velocity is a physical quantity which refers to the average of the velocity it takes to compete certain displacement.
It is calculated by adding two velocities and dividing by net time taken.
What is displacement?Displacement is a physical quantity which refers to the shortest possible distance between two points. Displacement drawn is generally a straight line until space curvature starts.
Given:
Speed in first base = 4.2 m/s
Speed in second base = 5.8 m/s
Time taken for first base = 0.5 seconds
Time taken for second base = 1.5 seconds
Average velocity = (4.2+5.8)/2
Average velocity = 5 m/s
Total time taken = 2 seconds
Average displacement = average velocity × total time taken
Average displacement = 5 × 2
Average displacement = 10 meter
Therefore, resultant displacement such that Felix steals second base running at a speed 4.2 m/s and slides into second base at a speed of 5.8 m/s is 10 meter.
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If metal cube of side 10 cm at temperature 27° are putted on oven at temperature 227° if expansion Coefficient is 0.000011 c^-1 find the extension volume
The expansion volume of the metal cube is determined as 2.2 cm³.
Volume of expansion of the metal cube
The volume of expansion of the metal cube is calculated as follows;
ΔV = V₀αΔT
where;
V₀ is the initial volume of the metal cubeΔT is change in temperatureα is expansion coefficientΔV = (10 cm)³ x (0.000011)(227 - 27)
ΔV = 2.2 cm³
Thus, the expansion volume of the metal cube is determined as 2.2 cm³.
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help me pleaseeeeeee
The unit conversion of 1.5 x 10⁸ Gm to m = 1.5 x 10¹⁷ m.
The unit conversion of 2.6 x 10⁻⁵ nm = 2.6 x 10⁻²⁰ Mm.
The unit conversion of 2.72 x 10⁻⁵ μm = 2.72 x 10⁻¹¹ m.
The unit conversion of 2.56 x 10⁻³ cm = 2.56 x 10⁻⁸ km.
The unit conversion of 2 hr = 7,200 seconds.
The unit conversion of 2 h 30 min = 9,000 seconds.
What is unit conversion?Unit conversion involves the change of unit of a substance from one base to another.
Converting 1.5 x 10⁸ Gm to m1.5 x 10⁸ Gm = 1.5 x 10⁸ x 10⁹ m = 1.5 x 10¹⁷ m
Converting 2.6 x 10⁻⁵ nm to Mm2.6 x 10⁻⁵ nm = 2.6 x 10⁻⁵ x 10⁻⁹ x 10⁻⁶ m = 2.6 x 10⁻²⁰ Mm
Converting 2.72 x 10⁻⁵ μm to m2.72 x 10⁻⁵ μm = 2.72 x 10⁻⁵ x 10⁻⁶ m = 2.72 x 10⁻¹¹ m
Converting 2.56 x 10⁻³ cm to km2.56 x 10⁻³ cm = 2.56 x 10⁻³ x 10⁻² m x 10⁻³ km/m = 2.56 x 10⁻⁸ km
Converting 2 hours to seconds2 hr = 2 x 3600 s = 7,200 seconds
Converting 2 h 30min to seconds2 h 30 min = 7,200 seconds + 1800 s = 9,000 seconds
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The DEA approves drugs for dispensing in the United States
true or false
Answer:
false. the DEA does not approve this
A net force of 34 N is applied to accelerate an object at a rate of 2.5m / (s ^ 2) What is the mass of the object?
Answer:
F = M a Newton's Second Law
34 kg m / s^2 = M * 2.5 m / s^2
M = 34 / 2.5 kg = 13.6 kg
Match the particles with their characteristics,
subatomic particles with a positive charge
subatomic particles with a negative charge
subatomic particles with no charge
made of atoms
neutrons
-
>
electrons
protons
molecules
Any of the different self-contained units of matter or energy that are the building blocks of all matter are considered subatomic particles, also known as elementary particles.
Match the particles with their characteristics.
Subatomic particles with a positive charge. - Protons.Subatomic particles with a negative charge. - Electrons.Subatomic particles with no charge. - Neutrons.Made of atoms. - Molecules.The heavier constituents of the atom's small, but incredibly compact nucleus, the positively charged protons and the electrically neutral neutrons, are subatomic particles, as are the negatively charged, practically massless electrons that make up the majority of the atom's size.
In 1911, Rutherford demonstrated that the majority of an atom's mass is contained in its tiny nucleus, at the center of the atom, revealing the fundamental structure of the atom. Rutherford proposed that the nucleus of the atom, which is dense and positively charged, orbits the lighter, negatively charged electrons in a manner similar to how the planets do around the Sun.
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