PLEASE HELP ITS DUE IN 30 minutes!!! which two statements explain why a student standing at the top of a step stool doesnt move downwards
Answer:
i think it is c and b
Explanation:
Answer:
The correct answer is option b and c.
differences between work against friction and work against gravity.
Friction is the force that is resisting the motion of an object so it will always point in the opposite direction of that of movement. ... The force of gravity points downwards . So when you do work against gravity it means that the force acting on that object points in the upward direction .
Explanation:
hope this would be the right answer HOPE THIS HELPS YOU.......what does the process skill measuring mean?
Answer:
Process Skills: Observing - using your senses to gather information about an object or event. It is description of what was actually perceived. using standard measures or estimations to describe specific dimensions of an object or event
Explanation:
i hope this isnt confusing
How fast is a car going in m/5 if speedometer reads 45 miles?
Answer:
i think you would have to divide to 2 numbers to get the sum
Explanation:
The chart shows data for a moving object.
Which conclusion is best supported by the information in
the chart?
Time (s)
Velocity (m/s)
2
4
6
CO COCO
O The object has negative displacement.
The object has negative acceleration.
The object does not have displacement.
The object is not accelerating.
Answer:
The object has negative acceleration.
Explanation:
Please give the other person the brainliest!
Answer:Its B or The object has negative acceleration
Explanation:
Trust
A particle makes 240 revolution per minute on a circular radius of 2m find: (1) it's period (2) it's angular velocity (3) it's linear velocity (4) it's acceleration
Answer:
(1) The period 0.25 secs
(2) The angular velocity is 25.14 rad/s
(3) The linear velocity is 50.28 m/s
(4) The acceleration is [tex]1264 m/s^{2}[/tex]
Explanation:
(1) Period is defined as the time taken for one revolution
∴ [tex]Period = \frac{Time }{Number of revolutions }[/tex]
From the question, the particle makes 240 revolution per minute
That is, For 240 revolution, the time taken = 1 minute
Time = 1 minute = 60 secs
Number of revolutions = 240
∴ [tex]Period =\frac{60}{240} \\[/tex]
Period = 0.25 secs
The period 0.25 secs
(2) The angular velocity, ω is given by
ω [tex]= \frac{2\pi }{T} \\[/tex]
where [tex]T[/tex] is the period
∴ω = 2 ×[tex]\frac{22}{7}[/tex] / 0.25 (take [tex]\pi = \frac{22}{7}[/tex])
ω = 25.14 rad/s
The angular velocity is 25.14 rad/s
(3) The linear velocity, v is given by
v = ωr
Where v is the linear velocity
ω is the angular velocity
and r is the radius
From the question, r = 2m
From v = ωr
∴v = 25.14 × 2
v = 50.28 m/s
The linear velocity is 50.28 m/s
(4) The acceleration is given by
[tex]a =[/tex] ω × v = ω(ωr) =ω²r
∴ [tex]a = 25.14^{2}[/tex] × [tex]2[/tex]
[tex]a = 1264.04 m/s^{2} \\a = 1264 m/s^{2}[/tex]
The acceleration is [tex]1264 m/s^{2}[/tex]
when is your weight is equal to mg?
Answer:
The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.
Answer:
Weight is always equal to mg.
as we know the formula
Weight=mass(m)× acceleration due to gravity (g)
Your may may be when our weight is equal to Zero.
Our weight is zero:1) at the center of the earth because value of g is 0 there
2)in the space at null point
3)during weightlessness
i guess it may be your required answer.please have a look and reply
what aspect of the gas planets has the biggest effect on their rings and satilites.
Answer:
Explanation:gravity
.
Answer:
Gravity
Explanation:
Gravuty aspect of the gas giants has the biggest effect on their rings and satellites.
the temperature of two bodies differ by 1°c. how much will they differ in Fahrenheit?
Answer:
the answer is 1.8°f...
Answer:
33.8 degrees.
Explanation:
in addition to power input, light bulbs should also be labelled with the rate at which they emit visible light. Suggest why.
Answer:
because they need light
Explanation:
The given statement is true.
The following information should be considered;
The light bulb should be the electric device that converts the electrical energy into the light energy, in such a way that the source of illumination should be occupied within a closed shell, that contains the round shape. Therefore, it should be labelled with the emission of the visible light.learn more: https://brainly.com/question/26115859?referrer=searchResults
identify two kinda of data the student will likely collect during his experiment
The driver of a car traveling at a speed of 27 m/s slams on the brakes and comes to a stop in 3 s. If we assume that the speed changed at a constant rate (constant net force), what was the average speed during this 3 s interval
Answer:
Average speed = 13.5 m/s
Explanation:
Since the car is running at a speed of 27 m/s and it stops after 3 seconds by applying the brake. Therefore, the initial speed of the 27 m/s and final speed is 0.
Use below formula to find the average speed :
Average speed = (Initial speed + final speed ) / 2
Average speed = (27 + 0 ) / 2
Average speed = 13.5 m/s
During the annual shuffleboard competition, Renee gives her puck an initial speed of 9.32 m/s. Once leaving her stick, the puck slows down at a rate of -4.06 m/s2. Determine the time it takes the puck to slow to a stop.
Answer:
40
Explanation:
because of the force acting on it
what a measurement standard is defined as?
Answer:
Measurement is the competion of known quantity to unknown quantity.
Explanation:
I hope that it will be right answer
Answer:
Measurement standard is relationship of a physical quantity.
Explanation:
Measurement standard is the fundamental reference and measuring the compared the device, these reference is controlled to the objects conditions to the physical quantity.
Measurement standard are international and perfect master standard and they can not used to the general purpose, there are following categories are:-(1) primary standards (2) secondary standard (3) working standard.(1) primary standard is also known as the master standard to the careful conditions, they are used to the long internals only and they compare to the secondary standard.(2) Secondary standard is also known as the primary standard these type of standard are compared to the regular intervals, and distribute to the safe custody.(3) Working standard is also used to the workshop and laboratories by the worker these are to used in the materials reduce cost.Measurement standard is the need of working to the standards in based to the international standard system.Starting at point 0, you travel 500 m on a straight road that slopes upward at a constant angle of 5 degrees. What is your height above the starting point? Answer in meters to the nearest centimeter
Answer:
43.58 m
Explanation:
If you travel 500 m on a straight road that slopes upward at a constant angle of 5 degrees
Using trigonometry ratio
Sin 5 = opposite/hypothenus
Where the hypothenus = 500m
Opposite = height h
Sin 5 = h/500
Cross multiply
500 × sin 5 = h
h = 500 × 0.08715
h = 43.58m
Therefore, the height above the starting point is equal to 43.58m
why is gravity only on earth?
Answer:
Gravity is not just found in earth. It is an attractions which can occur in any objects in the universe.The difference is just on less and more gravity.
PLZ HELP ME 50 POINTS AND BRAINLEIST TO FIRST PERSON Give an example of the strong surface tension exhibited by water
Answer:
Water striders have strong intermolecular forces on their legs which enables them to run on water.
What happens when a car that weighs 300 lbs. driving at speeds of 80 mph collides with a bystander that weighs 180 lbs.
Answer:
Basically, at these speeds, the car will, at random times, swerve a bit to one side or the other as if hit by some huge wind (even on the calmest of days). It doesn't happen at slower speeds driving mechanically identical cars, managed to accelerate to a formidable 150 mph and stay there for most of the journey, shifting to higher gears and remaining.
Hope this helped you!
Explanation:
A ship coming from sea enters the river ,with its hull sink more or less in river water?Give reasons.
Explanation:
Hey, there!
Answer: It sinks more.
We know that the water of sea is salty in nature which increases the density of water in sea and donot let's ship sink but in condition of river water it doesn't have any effects of salty water as it doesn't contain salty water due to which it's density is no more than the densityof ship which let's it sink more than sea water.
Hope it helps...
Why did Hubble's data change our view of the universe?
Answer:
Hubble has helped survey galaxies that existed when the universe was only 600 million years old. Previous estimates had suggested that galaxies didn't form until the universe was at least two billion years old. The instrument's images have helped scientists understand how galaxies evolve.
Explanation:
a) A student performs an experiment and plots the V-I graph of series and parallel combination
of two resistors. Which graph represents series combination of resistors? Justify your answer.
b) Define joules law of heating
c) 100 J of heat are produced each second in a 42 resistance. Find the potential difference
across the resistor.
Answer:
b) Joule's law is that the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I2R. The power P has units of watts, or joules per second, when the current is expressed in amperes and the resistance in ohms.
Explanation:
c) P= v2÷R
PR=V×V= 100×42=4200
v=sqroot 4200= 64.8volts
A U-tube is open on both ends and partially filled with water. Benzene (does not mix with water, density = 897 kg/m3) is poured into one arm forming a column of benzene 4 cm high. What is the difference in height between the two columns of water?
Answer:
0.459cm
Explanation:
Using
Po+ (L + h1) dBg= Po + Lx DW xg
So
h1= L( dw/dB-1)
= L( 1000/897-1)
= 4cmx 0.114
h = 0.459cm
please help ! will mark brainliest < 3
Answer: 50m
Explanation:
Velocity is the Amount of Displacement an object makes, as Speed is the amount of Distance. As the problem is asking for displacement, find out how much he/she went in a straight line. He went from 10 - 60, so suptract, and get 50m.
A ball is thrown straight up with an initial velocity of 6.4 m/s. It travels for 0.64 seconds, and has a change of position of 2.05 meters. What is the ball’s final velocity?
Answer:
V = 0.9 m/s
Explanation:
The parameters given are:
Initial velocity U = 6.4 m/s
Time t = 0.64s
Height h = 2.05 m
To find the final velocity, let us use third equation of motion
V^2 = U^2 - 2gH
Since the ball is going upward, g will be negative
Substitute all the parameters into the formula
V^2 = 6.4^2 - 2 × 9.8 × 2.05
V^2 = 40.96 - 40.18
V^2 = 0.78
V = sqrt( 0.78)
V = 0.883 m/ s
V = 0.9 m/ s approximately
When is elastic potential energy stored and when is it released in: a toy glider launcher the elastic cords or springs beneath a sun-lounger a diving board?
Answer:
Explanation:
Assuming a toy glider works on a spring potential energy is stored when the spring(launcher) is fully compressed..and is released when the spring is released.
Potential Energy is stored when the diver has stepped on the board, and the board is at the bottom of its movement, and is released when the diver jumps off.
How much is the plane's acceleration while breaking if it takes 15 s for its velocity
is changing from 145 m/s to 75m/s?
A. 4.67 m/s
B. 3.4 m/s
C. 45 m/s
D. 23 m/s
Answer:
A. 4.67 m/s²
Explanation:
u = 145 m/s
v = 75 m/s
t = 15 s
a = v - u / t
= 145 - 75 / 15
= 4.67 m/s²
Hope this helped...
force of earth is 6 into 10 to the power 24 Kg 1 kg-iii 6.4 find the force
Answer:
Explanation:
Here is the answer---
Given Conditions ⇒
Mass of the Earth(m₁) = 6 × 10²⁴ kg.
Mass of the Moon(m₂) = 7.4 × 10²² kg.
Distance between the Earth and the Moon(d) = 3.84 × 10⁵ km.
= 3.84 × 10⁸ m.
Gravitational Constant(G) = 6.7 × 10⁻¹¹ Nm²/kg².
Using the Newton's law of Gravitation,
F = G × m₁× m₂ × /d².
F is the Force of Gravitation between the Earth and the Moon.
Substituting the Given Values in the Formula,
∴ F = (6.7 × 10⁻¹¹ × 6 × 10²⁴ × 7.4 × 10²²) ÷ (3.84 × 10⁸)²
⇒ F = (6.7 × 6 × 7.4 × 10¹⁹) ÷ (14.7456)
⇒ F = 20.1741 × 10¹⁹ N.
⇒ F ≈ 20.2 × 10¹⁹ N.
Thus, the Gravitational Force of Attraction between the Earth and the Sun is 20.2 × 10¹⁹ N.
The function of a body part depends upon the way it is constructed. The branch of medical science called considers the functions of anatomical parts, whereas describes the form and organization of body parts.
Answer:
. The branch of medical science called PHYSIOLOGY considers the functions of anatomical parts, whereas ANATOMY describes the form and organization of body parts.
Explanation:
THIS is because Anatomy the branch of life studyconcerned with the study of the structure of organisms and their parts
Whilw physiology studies the functioning of these parts
The branch of medical science that considers the functions of anatomical parts is called physiology, whereas anatomy describes the form and organization of body parts.
Physiology is the study of how body parts function and work together to maintain life processes and perform specific tasks. It focuses on the mechanisms and processes that underlie bodily functions, such as digestion, circulation, and muscle contraction.
On the other hand, anatomy is concerned with the structure, shape, and organization of body parts, including organs, tissues, and cells.
Together, anatomy and physiology provide a comprehensive understanding of the human body and its intricate workings, helping medical professionals diagnose and treat illnesses and maintain overall health.
Therefore, The branch of medical science that considers the functions of anatomical parts is called physiology.
To know more about the physiology:
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An unknown substance has a mass of 670 kg and a volume of 782 m^3. Will it float in water? (Water has a density of 1,000 kg/m^3.)
Answer:
It will float
Explanation:
its density is lower than density of water
Its density is 670 / 782 = 0.856 kg/m³
How does the hypothesis help inform the design of an experiment
Answer: Hypotheses, which are proposed explanations for scientific observations, help us properly design experiments because experiments are used to test those hypotheses. Experiments are designed based on the measurable variables defined in a given hypothesis.
Explanation: Make a list of all potential hypotheses to be tested. For each hypothesis, ask what would be true if the hypothesis were true. The experimental procedure is a step-by-step recipe for the science experiment. A good procedure contains enough detail that someone else could easily duplicate the experiment.
Hope this helps^^