Answer:
His average speed is 0.15 kilometer per minute or 2.5 meters per second.
Explanation:
average speed = distance/time
x = 3 km/20 minutes
x = 0.15
—
x = 3000 m/1200 s
x = 2.5
If a student walks a distance of 3 km in 20 minutes then the average speed of the student would be 9 kilometers per hour.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.
As given in the problem we have to calculate the average speed of the student if a student walks a distance of 3 km in 20 minutes.
The distance traveled in 20 min = 3 kilometers
The distance traveled in 60 min = 3 × 3
= 9 kilometers
Thus, If a student walks a distance of 3 km in 20 minutes then the average speed of the student would be 9 kilometers per hour.
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Explain why a person's hand will not go through a wall when the person pushes on it
Answer:
BECAUSE WALL IS SOLID .......
the area under a velocity-versus-time graph of an object is
Answer:
Displacement
Explanation:
The area under a velocity-time graph is the displacement. Velocity can be negative if an object is moving backwards.
Sana makatulong!!
what form of energy is released by radioactive particles during a nuclear reaction.
The energy of nuclear fission is released as kinetic energy of the fission products and fragments, and as electromagnetic radiation in the form of gamma rays; in a nuclear reactor, the energy is converted to heat as the particles and gamma rays collide with the atoms that make up the reactor and its working fluid, ...
How do the force factors compare to the products of the masses?
Answer:
The force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
when the driver of a car applies the brakes a force of 4000N brings the car to a stop over a distance of 50m.calculate the work done by the braking force.
Answer:
W = F*d
W = 4000*50
W = 200000J
W = 200KJ
Which list correctly orders effort (E), fulcrum (F), and load (L) for each lever class? (1 point)
class 1 = F, E, L (or L, E, F)
o class 2 = L, F, E (or E, F, L)
class 3 = F, L, E (or E, L, F)
class 1 = F, L, E (or E, L, F)
o class 2 = F, E L (or L, E, F)
class 3 = L, F, E (or E, F, L)
class 1 = L, F, E (or E, F, L)
o class 2 = F, L, E (or E, L, F)
class 3 = F, E, L (or L, E, F).
class 1 = F. E, L (or L, E, F)
o class 2 = F, L, E (or E, L, F)
class 3 = L. F. E (or E, F. L)
The list that correctly orders effort (E), fulcrum(F) and load (L) for each lever class is
class 1 = L, F, E (or E, F, L) class 2 = F, L, E (or E, L, F) class 3 = F, E, L (or L, E, F).Machine are instruments that make work easier, faster, and convenient to do,
The lever is an example of the machine and we have 3 classes of lever depending on the position of the Load, Effort, and Fulcrum.
Three types of lever are;
First-class lever - The fulcrum (F) is between the Load and the effortSecond class lever: The load (L)is between the effort (E) and the fulcrum(F).Third class lever: The effort (E) is between the load (L) and the fulcrum (F)Learn more here: https://brainly.com/question/24115317
I don't understand this question can someone help me with this please, please explain!! and thank you for the help!! If u dont know try your best :D
Answer
both earthquakes and tsunamis have waves
Explanation:
Tsunamis are caused by earthquakes, underwater land slides, volcanic eruptions, and land sloping into the ocean. An earthquake is rapid shaking of the earths surface. It's no wonder earthquakes cause mass destruction, because they occur when two plates collide. Also earthquakes occur more often than tsunamis do.
Can someone help me with this? (The answer marked in red text is a incorrect answer)
Answer:
the answer is A
Explanation:
because I just know
The precision of a balance is ±0.02 g. The accepted value for a measurement is 26.86 g. Which measurement is in the accepted range?
[tex]\sf{ [26.84, 26.88] }[/tex]
Explanation:
The precision of a balance is ±0.02 g.
The accepted value for a measurement is 26.86 g.
The accepted range is:=[26.86-0.02, 26.86+0.02]= [26.84, 26.88]Help me to solve it . It’s urgent
Answer: 0°
Explanation:
Step 1: Squaring the given equation and simplifying it
Let θ be the angle between a and b.
Given: a+b=c
Squaring on both sides:
... (a+b) . (a+b) = c.c
> |a|² + |b|² + 2(a.b) = |c|²
> |a|² + |b|² + 2|a| |b| cos 0 = |c|²
a.b = |a| |b| cos 0]
We are also given;
|a+|b| = |c|
Squaring above equation
> |a|² + |b|² + 2|a| |b| = |c|²
Step 2: Comparing the equations:
Comparing eq( insert: small n)(1) and (2)
We get, cos 0 = 1
> 0 = 0°
Final answer: 0°
[Reminders: every letters in here has an arrow above on it]
Pleaseee helppp I need help I don’t know how to do this
Answer:
1)So, the mass(m) of the tv is 75kg and the scale(weight)=825 N therefore you devide the weight by the mass which is equal to 11m/s^2
2)First things first you need to know the gravitational force here on earth which is 9.8(approximately 10) I will sove for 9.8 and 10 so you can choose
the fish has a mass of 2.4kg and the gravity= 9.8 so the weight is equal to the mass*gravity= 23.52
now if you use 10 as the gravity= 2.4*10= 24
3) here the weight is 250N and gravity is 9.8(10) so we just devide the weight by the gravity= 250/9.8= 25.51
250/10= 25( if gravity is 10)
Answer:
Explanation:
12.since W=mg where m is mass and g which is accelaration due to gravity,
g=825N/75kg
g=11 m/s^2
13.W= 2.4kg * 9.81m/s^2
=23.544kg m/s^2=23.544N
14.m=250N/9.81ms^-2
=25.48kg
Which object is in the sample of chemical change?
* Digesting a salad
* Mixing a salad dressing
* Dicing an onion
* Preparing a salad
Can someone answer this quickly, sorry if it’s rushed. ~Ty
Answer:
Digesting a salad
Explanation:
All the other ones are physical changes because you're changing its form but not its chemical identity and not changing the substance. Digesting a salad is a chemical change because you're both changing its form AND its chemical identity
. In a wave, …………………… is carried from one place to another.
1.Energy
2.Transverse 3.Longitudinal
4.Medium
Answer:
The answer is energy it can be carried from one place to another.
please mark this as brainliest
Answer:
energy
Explanation:
In a wave phenomenon, energy can move from one location to another, yet the particles of matter in the medium return to their fixed position. A wave transports its energy without transporting matter. Waves are seen to move through an ocean or lake; yet the water always returns to its rest position.
Which statements are true?
Answer:
10
Explanation:
yum lang po alam ko sana po tama yun
heeelllllpppp plleeeaaassseee
Explanation:
We call the magnitude of the charge of an electron as ELEMENTARY CHARGE.
Could someone please help me
Answer:
For the first one I Would just draw a triangle type shape going out towards the screen like light is being shined upon it. And the next question I would say the answer is yes.Explanation:
Hope this helps :)
Pls make brainliest :3
And have an amazing day <3
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely: a. increase b. decrease c. stay about the same
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely decrease.
therefore your answer is B)decrease
Hope this helps you- have a good day bro cya)
The force of dry sliding friction between the two surfaces will most likely decreases.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely decrease.
The force of dry sliding friction between the two surfaces will most likely decreases.
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URGENT PLEASE HELP
A ball is thrown upward from the top of a 22.0 m tall building. If the ball's initial speed is 11.0 m/s and travels to a height of 6.2 m, with what final velocity does the ball hit the ground?
Answer:
It is launched with a speed of 11 m/s.
Explanation:
Hii I need help ASAP with this physics question
A roller coaster has two vertical loops one after the other. The roller coaster has a speed of 7m/s at the top of the first loop with a height of 22.2m. It then proceeds around the second vertical loop with a height of 15.0m. What is the speed of the roller coaster at the top of the second vertical loop?
a.7m/s b.13.8m/s c.8.40m/s d.9.24m/s e.11.2m/s
Plz explain I can’t understand the question what I’m I supposed to use to calculate
Between the top of the first and the top of the second loop, the coaster has lost potential energy = mgh, where h = 22.2 - 15 = 7.2m
This energy would have converted to Kinetic. Write out an equation and the masses will cancel out. Does that hint help you to find the solution? If not, I will give you another hint.
calculate the volume of sphere with radius 7 cm
Explanation:
the formula is:
[tex](4\pi \times r {}^{3} ) \div 3 [/tex]
where r is the radius
so
(4π × 7³) ÷ 3 =
(4π × 343) ÷ 3 =
[tex] \frac{1372\pi}{3} [/tex]
Answer:
V=4 /3πr3
=4/ 3·π·73
≈1436.75504cm³
Explanation:
how long does it take to charge a 64-kwh battery from 0 to full using a level 1, 120v charger?
The time required to charge the 64 kwh battery from 0 to full is 45.7 hours.
A level 1 120 V charger supplies a power of 1.4 kW at 20 A.
Since we need to charge a 64 kwh battery with a level 1 120 V charger, the total energy required by the battery is E = 64 kwh.
Since the power rating from the charger is P = 1.4 kW, we know that
energy, E = power, P × time
So, time = energy/power
So, the time required to charge the 64 kwh battery from 0 to full is
time = 64 kwh/1.4 kW
= 45.71 hours
≅ 45.7 hours
So, the time required to charge the 64 kwh battery from 0 to full is 45.7 hours.
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what is one effective way to calibrate a thermometer
Calibration can be defined as the way an instrument is adjusted such that the measurement the instrument gives after calibration is precise and accurate.
One effective way to calibrate a thermometer is the use of ice water.
A thermometer can be defined as the instrument used to measure the temperature of a person or a substance.
A thermometer should be calibrated regularly in order to maintain a high level of precision and accuracy.
One of the effective ways to calibrate a thermometer is through the use of ice water.
The steps to calibrate a thermometer are given below:
Get a bowl, place some ice cubes in it and add additional cold water to it. Place thermometer probe between 2 -3 inches deep in the water. For accurate calibration, make sure you prevent the thermometer from touching the sides of the glass. Stir and wait for a few seconds. The thermometer should be properly calibrated when you read the measurements and it says 32°FTo learn more, visit the link below:
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true or false
your mass would be the same on the moon as it is on the earth??
I need helppp
Answer: False
Explanation: The Earth has more gravitational pull than the moon.
You kick a ball with a speed of 18 m/s at an angle of 32°. How far away does the ball land
Answer:
d = V^2/g*sin(32*2) = 18^2/9.8*0.90 = 29.72 m
Explanation:
nakuha ko den sa brainly :,) so di sakin tong sagot na toh
Question one, I understand that the answer is C but why?
Jus answer pls I’m done with physics
5. 35 - (-20) = 55
6. [tex]v_{av}=\frac{\Delta s}{\Delta t}=\frac{20-(-20)}{6-0} =\frac{40}{6} =6.67[/tex]
7. D and G
8. A, C, and E
9.
At t = 19,
[tex]s=\frac{s_{final}-s_{initial}}{t_{final}-t_{initial}}(t_1-t_{initial})+s_{initial}=\frac{40-(-20)}{23-18}(19-18)-20=12-20= -8[/tex]
At t = 27,
[tex]s=\frac{s_{final}-s_{initial}}{t_{final}-t_{initial}}(t_1-t_{initial})+s_{initial}=\frac{0-40}{29-26}(27-26)+40=\frac{-40}{3}+40=26.67[/tex]
Therefore, displacement between t = 19 and t = 27 is:
26.67 - (-8) = 34.67
10. [tex]v=\frac{\Delta s}{\Delta t}=\frac{0-40}{29-26}=-13.33[/tex]
11. -20
12. [tex]v=\frac{\Delta s}{\Delta t}=\frac{20-(-20)}{6-0}=\frac{40}{6}=6.67[/tex]
helicopter flies an average velocity of 70 m/s2 for 10.0 seconds. What ios ther magnitude of the helicopter's displacement? answer should have 3 significant figures
The uniform movement allows finding the results for the helicopter displacement during the 10 s is: 700 m
Kinematics studies the motion of bodies, finding relationships between the position, velocity and acceleration of the body, in the special case that the acceleration is zero, it is called uniform motion and is described by the equation
[tex]v = \frac{\Delta s}{t}[/tex]
Where v is the average velocity, Ds is the displacement and t is the time
Δs = v t
They indicate that the average speed is 70 m / s and the travel time is t=10.0s
Let's calculate
Δs = 70 10.0
Δs = 700 m / s
In conclusion using the uniform movement we can find the results for the helicopter displacement is: 700 m
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The magnitude of the helicopter's displacement is 700 meters.
Given the following data:
Velocity = 70 m/sTime = 10 seconds.To find the magnitude of the helicopter's displacement:
Velocity can be defined as the rate of change in displacement (distance) with time.
Also, velocity is a vector quantity and as a result of this, it has both magnitude and direction.
Mathematically, velocity is given by the formula;
[tex]Velocity = \frac{displacement}{time}[/tex]
Making displacement the subject of formula, we have:
[tex]Displacement = velocity[/tex] × [tex]time[/tex]
[tex]Displacement = 70[/tex] × [tex]10[/tex]
Displacement = 700 meters.
Therefore, the magnitude of the helicopter's displacement is 700 meters.
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составьте сложный план к тексту казахстан принимает азиаду
Answer:
no hablo russian
What does Newton's second law describe?
A. How inertia affects the motion of an object
B. The relationship between force, mass, and acceleration
C. Action-reaction pairs
D. How friction and the normal force are related
HELP Where would you predict the highest atmospheric pressure?
A. In the southwest
B.In the northwest
C. In the southeast
D. In the northeast
Answer:
B
Explanation:
The correct answer is B: in the northwest.