An object falls freely from height H. if it takes one second to travel last half of total displacement find height H priop to the fall.
Answer:9.82 m
Explanation:
As we know from equation of motion
S=v*t +0.5 a t^2
Know s=H/2
a =9.82
t=1
V=0
Plugging the values
H*0.5=0+0.5*9.82*1^2
H=9.82 m
You are riding in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. What should you do
Answer: give up because nothing can be done.
Explanation:
You would have to give up because you have taken on an impossible task. And nothing can be done because there is no known means available to you to measure or observe what is happening outside the spaceship. And as a result this has made it an impossible task knowing the velocity of the ship or finding out.
Can someone tell me the answer of this question?
Answer:a 1 10th
b89 10
Explanation:
thats all i know so thank me when yoiu get them right:)
Which of the following is an example of a primary source?
A. Scientific journal
B. Dictionary
C. Encyclopedia
D. Newspaper
Answer:
scientific journal
in my guess
Answer:
scientific journalExplanation:
1) While traveling along a highway a driver speeds up from 10 m/s to 26 m/s in 4 seconds. What is the automobile's acceleration? *
Answer:
4m/s^2
Explanation:
using the formula a = (v_f - v_i) / Δt we can use final velocity, initial velocity, and accel. time to calculate the accel. rate
In this problem it would be a=(26m/s - 10m/s) / 4s
our answer would be 4m/s^2
The digigram shows a vertical number line.
What is the position of point X?
х
016
-12
12
16
0
Answer:
16
Explanation:
The position of X is 16 because they gap between -4 and 0 is 4.
Runner A is initially 5.3 km west of a flag-
pole and is running with a constant velocity
of 8.8 km/h due east. Runner B is initially 5.0
km east of the flagpole and is running with a
constant velocity of 7.7 km/h due west.
How far are the runners from the flagpole
when their paths cross?
Answer in units of km.
8,000 mg + 2 g = _____________ mg?
Answer:
10,000 mg
Explanation: 1g= 1000mg
Therefore,
8000 mg+2000mg=10000mg
Answer:
10
Explanation:
1mg=1/1000gso 8000mg=8000/1000g
A hockey puck moves 18 meters southward, then 12 meters
northward, and finally 8 meters southward.
Answer:
where is the question?
3) For the graph on the right, the graphical representation between speed and mass could best be described as: A. The speed of fall is directly proportional to the mass. B. The speed of the fall is proportional to the square root of the mass. C. The speed of fall is inversely proportional to the mass. D. The speed of the fall is proportional to the square of the mass. E. There is no relationship between the speed of fall and mass. speed of fall mass
Answer:
B
Explanation:
KE=0.5mv^2
The speed is inversely proportional to the square root of mass
Explain what radiation is in 1-2 paragraphs please, thank you
Answer:
Explanation:
Radiation is often categorized as either ionizing or non-ionizing depending on the energy of the radiated particles. Ionizing radiation carries more than 10 eV, which is enough to ionize atoms and molecules and break chemical bonds. This is an important distinction due to the large difference in harmfulness to living organisms. A common source of ionizing radiation is radioactive materials that emit α, β, or γ radiation, consisting of helium nuclei, electrons or positrons, and photons, respectively. Other sources include X-rays from medical radiography examinations and muons, mesons, positrons, neutrons and other particles that constitute the secondary cosmic rays that are produced after primary cosmic rays interact with Earth's atmosphere.
Compare the structure of a lithium atom to the structure of a lithium ion
Answer:
A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion. It now has more positive protons than electrons so it has an overall positive charge. Therefore it is a positive ion.
Answer:
If an atom gains or loses an electron, it bacomes an ion. ... A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion. It now has more positive protons than electrons so it has an overall positive charge.
Explanation:
CAN YOU GUYS PLEASE HELP I AM STRUGGLING According to Newton's second law, if you have an object that is put under acceleration due to a force, how could you reduce the acceleration on the object by half if you keep the force the same? a Reduce the mass to zero b Increase the force c Double the mass d You cannot decrease the acceleration with the same force
Define investigation to show its scientific meaning.
Answer:
the action of investigating something or someone; formal or systematic examination or research.
Explanation:
This definition is provided by Oxford Languages
How long does it take an airplane to fly 5000 miles if it maintains a speed of 240 miles per hour
Science occupations can have a significant impact on the economic success of a business.
True
False
Answer:
true
Explanation:
i just took the test
Answer:
TRUE!!!!!
Explanation:
TRUE!!!!!
TRU!!!!!!
TR!!!!!!
T!!!!!!
A car rolls down a ramp in a parking garage. The horizontal position of the car in meters over time is shown below. Graph of horizontal position x (in meters) on y axis and time (in seconds) on x axis. The initial position is -3 m at t=0 s, and the position increases linearly to 3 m at t=8 s. Then the position is constant at 3 m until t=16 s, then increases linearly to 9 m at t=24 s.
Answer:
Explanation:
At t = 0 , X = -3 m
At t = 8s , X = + 3 m .
At t = 16s , X = + 3 m
At t = 24 s , X = + 9 m
Graph is shown in the attached file .
The displacement of the car between 8 seconds and 24 seconds is 6 m.
The given parameters:
Initial position of the car, x₁ = -3 m, time = 0 sSecond displacement, x₂ = 3 m, time = 8.0 sThird displacement, x₃ = 3 m, time = 16 sFinal displacement, x₄ = 9 m, time = 24 sThe displacement of the car between 8 seconds and 24 seconds is calculated as follows;
the position of the car at 8 seconds = 3 m
the position of the car at 24 seconds = 9 m
The displacement of the car = 9m - 3m = 6 m
Thus, the displacement of the car between 8 seconds and 24 seconds is 6 m.
The complete question is below:
What would be the displacement of the car between eight seconds and 24 seconds?
Learn more about displacement here: https://brainly.com/question/2109763
Two coyotes that are the same weight are running across the snow. Which of these is true? A. The coyote that is running the fastest has the most energy of motion. B. The coyote that is in front definitely has more energy of motion. C. The coyotes have the same energy of motion, even if they are running at different speeds. D. The coyote that is running the slowest has the most energy of motion.
Answer:
The above has the correct statement
Explanation:
The coyotes have the same energy of motion, even if they are running at different speeds.
2x+3y=10 answer must be in decimals
Calculate the speed of an 90,000 kg airplane with a kinetic energy of one billion Joules.
Answer:
Kinetic energy=1/2 mv^2.
which is 1,000,000,000=1/2×90,000×v^2.
1000000000=45,000v^2.
v^2=222.22.
v=√222.22.
v=14.9~15m/s.
The speed of a 90,000 kg airplane with a kinetic energy of one billion Joules would be 149.07 m/s
What is mechanical energy?
Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy.
Total mechanical energy is s the sum of all the kinetic as well as potential energy stored in the system.
ME = KE + PE
As given in the problem we have to calculate the speed of an airplane with a mass of 90,000 kg and kinetic energy of one billion Joules.
m= 90000 kg
K.E = 1 billion Joules
= 1,000,000,000 Joules
The total kinetic energy
KE = 1/2mv²
By substituting the respective values in the formula of kinetic energy
1,000,000,000 J = 1/2×90000 ×v²
v² = 1,000,000,000 ×2/90000
v² = 22222.222
v =149.07 m/s
Thus, the speed of a 90,000 kg airplane with a kinetic energy of one billion Joules would be 149.07 m/s
Learn more about mechanical energy from here
brainly.com/question/12319302
#SPJ5
843 L - 0.028 kL = ______________L?
Answer: 815 L
Explanation:
0.028 kL=28L (times 1000)
843 L-0.0028 kL=843L-28L=815 L
Hope this helps!! :)
Please let me know if you have any question or need any further explanation
What is true of daylight hours at locations north and south of the equator? Days are longer than nights north of the equator. Nights are longer than days south of the equator. The length of days and nights change with the seasons.
Answer:
The length of days and nights change with the seasons.
Explanation:
Distance from the equator along with the tilt of Earth's rotational axis contributes to day and night period differences. Daylight hours or the period of sunlight exposure vary due to the inclined axis of the latitudes. In the northern hemisphere during summers, the tilt of the axis is towards the sun which brought more sunlight to the exposed region. And therefore the length of day hours is more than the southern hemisphere which at the same time will be tilted away from the sun.
Answer:
pablo
Explanation:
si pablo come tacos con barbacoa
a man can swim with a speed of 5m/s in calm water. if this man swims crosses a specific river his speed is 3m/s. if he takes the minimum time to cross the river find the speed of the flow of water in the river...
plz answer me with all the steps!
I'll give u points ..mark brainliest and follow u
Answer:
The speed of the flow of water in the river is 4 m/s.
Explanation:
Given that,
Speed of man = 5 m/s
If this man swims crosses a specific river his speed is 3 m/s.
If he takes the minimum time to cross the river
Let the speed of flow of water be [tex]v_{r}[/tex]
We need to calculate the speed of the flow of water in the river
Using formula for velocity
[tex]v_{rs}^2=v_{r}^2+v_{s}^2[/tex]
[tex]v_{r}^2=v_{rs}^2-v_{s}^2[/tex]
Where, [tex]v_{s}[/tex] = velocity of swimmer
[tex]v_{sr}[/tex] = relative velocity
[tex]v_{r}[/tex] = velocity of river
Put the value into the formula
[tex]v_{r}^2=5^2-3^2}[/tex]
[tex]v_{r}=\sqrt{5^2-3^2}[/tex]
[tex]v_{r}=4\ m/s[/tex]
Hence, The speed of the flow of water in the river is 4 m/s.
Please Help!! Will Give brainlest!! Four friends push on the same block in different directions. Allie pushes on the block to the north with a force of 18 N. Bill pushes on the block to the east with a force of 14 N. Chris pushes on the block to south with a force of 23 N. Debra pushes on the block to the west with a force of 20 N. Assuming it does not move vertically, in which directions will the block move?(1 point) A) south and east B) north and west C) south and west D) north and east
Answer:
South and West
Those people are pushing the hardest. It will move south faster than it moves west.
Explanation:
When 10 N force applied at 30 degrees to the end of a 20 cm handle of a wrench, it was just able to loosen the nut. What magnitude of the force would require to just loosen the nut, if the force apply perpendicularly at the end of the handle
Answer:
5NExplanation:
To get the magnitude of the force would require to just loosen the nut, if the force apply perpendicularly at the end of the handle, we will have to resolve the force perpendicular to the wrench. Torque is the turning effect of a body or force about a point. It is similar to moments.
Torque = Force * radius
Note that the force must be perpendicular to the wrench. On resolving the force perpendicularly to the wrench, we will have to resolve the force to the vertical.
Fy = Fsinθ
Fy = 10sin30°
Fy = 10 * 0.5
Fy = 5N
Torque = Fy * r
Given Fy = 5N and r = 20cm = 0.2m
Torque = 5 * 0.2
Torque = 1Nm
Hence the magnitude of the force would require to just loosen the nut, if the force apply perpendicularly at the end of the handle is 5N
Two technicians are discussing electromagnetic induction. Technician A says that the induced voltage can be increased if the speed is increased between the conductor and the magnetic lines of force. Technician B says that the induced voltage can be increased by increasing the strength of the magnetic field. Which technician is correct?
Answer:
Both technicians are correct
Explanation:
In electromagnetic induction, the induced voltage can be increased by increasing the relative speed between the conductor and the magnetic line of force, by increasing the strength of the magnetic field, which increases the magnetic lines of force, Increase the strength of the magnetic field, so there are more flux lines, and also by increasing the angle between the flux lines and the conductor to a maximum of 90 degrees.
Does temperature affect the amount of sugar that dissolved in tea? Why
Answer:
Generally, a solute dissolves faster in a warmer solvent than it does in a cooler solvent because particles have more energy of movement. For example, if you add the same amount of sugar to a cup of hot tea and a cup of iced tea, the sugar will dissolve faster in the hot tea.
Convert 8.1 kilograms to grams
Answer:
8100 g
Explanation:
8.1 kg × 1000
= 8100 g
Answer:
8,100 Grams
Explanation:
To change Kilograms to Grams, you multiply the mass value by 1000.
So, 8.1kg x 1000 = 8,100g.
Hope this helps!
What is the primary source of a sound?
A refraction
A medium to carry the signal
A vibration
A frequency
Answer:
A vibration is the primary source of a sound.
Answer:
vibration
Explanation:
A sound is the result of a body vibrating in a medium that transmits the energy given off by the body. When a musician draws a bow across the strings of a violin, the strings vibrate and make a sound.
If force is made to act on a smaller area, then the pressure will be ______________