An old woman is worried about time. She walks at a rate of 2 meters per second and travels a
distance of 454 meters. How long does it take her to complete the motion?
Please help ASAP!! BRAINLIST please explain thankyou!!!
Answer:
227 seconds.
Explanation:
Speed is equal to distance divided by time. s = d/t
We can rearrange this algebraically to solve for the time it will take to cover a certain distance at a certain speed. Time is equal to distance divided by speed. t = d/s
Then we substiture our known values for the variables and solve for our unknown.
t = 454m / 2m/s = 227s
Answer:
If the lady is traveling 2 meters per second and she travels 454 meters then you will have to divide 454 by 2 to get the amount of time she walked.
454 divided by 2 = 227
This means that the lady traveled for 227 seconds or about 3.78 minutes.
what is the formula of kinetic and potential energy
hey its haris
Answer:
Explanation:
potential energy = mgh
kinetic energy = 1/2mv²
How much impulse is applied by a 25 N force in 30 seconds?
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Impulse.
Impulse is denoted by 'J'
hence, J = F. dt
so we get as,
J = (25)*(30)
J = 750 N-s
===> hence the impulse is 750 N-s
Impulse is applied by a 25 N force in 30 seconds is 750 N-s.
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.
Concept of the Impulse.
Impulse is denoted by 'J'
hence, J = F. dt
so we get as,
J = (25)*(30)
J = 750 N-s
hence the impulse is 750 N-s
Impulse is applied by a 25 N force in 30 seconds is 750 N-s.
To learn more about force refer to the link:
brainly.com/question/13191643
#SPJ2
Light travels from air into a swimming pool. How does its speed change?
Answer:
D
Explanation:
Answer:
D
Explanation:
it would move at the same speed because light makes it go at the same speed
When an object (like a ball) falls, some of its___ energy changes to ___ energy, due to the law of conservation of energy
Answer:
potential, kinetic
Explanation:
pls give brainliest :p
A 15 W electric shaver is used for 3 minutes. How much energy does it use in joules?
Please help!!!! It's due today!!!
In which situations is elastic potential energy present
Answer:
if positioned at height
Explanation:
just search it online
Answer: 1st, 4th, and 6th choice
A bow is drawn back from its equilibrium position.
A spring toy dart gun is loaded with a dart.
A bungee cord is stretched with a person at the end.
Explanation:
If these are the choices...
A bow is drawn back from its equilibrium position.
An arrow rests on a bow.
A spring toy dart gun is unloaded.
A spring toy dart gun is loaded with a dart.
A bungee cord is connected to a tall tower.
A bungee cord is stretched with a person at the end.
Edge 2021
How is a circuit formed
Answer:
An electrical circuit is composed of a source of electrical power, two wires that can carry electric current, and a light bulb. One end of both the wires is attached to the terminal of a cell while their free ends are connected to the light bulb. The electrical circuit is broken when the bulb is switched off.
Giving brainliest!! if you answer correctly :) (30pts)
Answer:
32000joule.
Explanation:
given
mass. (m)=160kg
speed (v)=20m/s
now
kinetic energy =1/2 (mv²)=1/2 ×{160×20²}=32000joule.
Answer:
Explanation:
Ke = 1/2 mv2
Ke = 1/2(160)(20)2
= 1/2(160)(400)
= 32000J
Option B is the correct answer
3. Jeremy has a solution with a mass of 228 g. He knows that the mass of the solvent was 224 g. How much is the mass of the solute in the solution?
Which has the strongest covalent bonds?
H2O
CO2
H2
N2
Answer:
co2 would be the best answer and because i just took this
Explanation:
why do we tilt umbrella in rain. Explain
Answer:
Rain is falling vertically. A man running in the road keeps his umbrella tilted but a man standing on road keeps his umbrella vertical to protect himself from the rain but both of them keep their umbrella vertical to avoid the vertical sun-rays. ... Thus we can tilt the umbrella to avoid it.
Explanation:
XOXO
Kit
Need help, please :D.
What is the kinetic energy of a 160 kg object that is moving at a speed of 20 m/s ?
What’s the difference between mechanical and chemical weathering
Answer:
Mechanical weathering is the physical breakdown of rock into smaller pieces. Chemical weathering is the breakdown of rock by chemical processes.
Explanation:
Mechanical weathering (also called physical weathering) breaks rock into smaller pieces. These smaller pieces are just like the bigger rock, just smaller. That means the rock has changed physically without changing its composition. The smaller pieces have the same minerals, in just the same proportions as the original rock.
Chemical weathering is the other important type of weathering. Chemical weathering is different from mechanical weathering because the rock changes, not just in size of pieces, but in composition Chemical weathering works through chemical reactions that cause changes in the minerals.
What sort of force is magnetism?
pls help ASAP :)
no links pls
Answer:
Magnetism is one aspect of the combined electromagnetic force. It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects.
Click on the graphic below until the correct answer appears.
Which applies to a real machine?
Answer:
there is no graphic
Explanation:
What method is used when you try several different solutions to see what
works?
A. Trial and error
B. Stages
C. Heuristic
D. Rational
Answer:
A
Explanation:
Trial and error is basically trying something, if it works, great. If it does not work, try another way.
Answer:
A. Trial and error
Explanation:
The other user is correct.
HELP PLEASE!! GIVING BRAINLIEST!! If you answer this correctly ill answer some of your questions you have posted! (20pts)
Explanation:
potential energy =360800J
mass(m)=?
height (h)=25m
g=9.8m/s²
we have
potential energy =360800J
mgh=360800J
m×9.8×25=360800
m=360800/(9.8×25)=1472.653061kg
Answer:
HELP PLEASE!! GIVING BRAINLIEST!! If you answer this correctly ill answer some of your questions you have posted!
In 1965, a group of students wore black arm bands to school in protest of American policies in Vietnam. Administrators banned the wearing of armbands on school grounds; however, the students wore them again and were suspended. A lawsuit followed, and the case was eventually taken to the Supreme Court.
Answer:
protected under students first amendment rights
Explanation:
did the studyisland :)
10-kg box is sliding across an ice rink at 10 m/s . A skater exerts a constant force of 10 N against it. How long will it take for the box to come to a complete stop?
Answer:
Time, t = 10 seconds
Explanation:
Given the following data;
Mass = 10kg
Force = 10N
Final velocity = 10m/s
Initial velocity = 0m/s
To find the time;
First of all, we would find the acceleration of the box.
Force = mass * acceleration
10 = 10 * acceleration
Acceleration = 10/10 = 1m/s²
Now, we can find the time by using the first equation of motion;
V = U + at
10 = 0 + 1t
10 = t
Time, t = 10 seconds
Therefore, it will take 10 seconds for the box to come to a complete stop.
GIVING BRAINLIEST IF YOU ANSWER CORRECTLY!! (20 pts!!)
Answer:
c 1386J
Explanation:
You use the formula MCΔT where m is mass, C is specific heat, and delta t is change in temperature
How do the sperm cells of nonvascular plants reach the egg cells during reproduction?
A.) The sperm cells are forcefully ejected from their capsules to hit the egg cells.
B.) The sperm cells are blown by the wind and land on the egg cells.
C.) The sperm cells swim to the egg cells through their watery surroundings.
Answer:
C.) The sperm cells swim to the egg cells through their watery surroundings.
A car moving 20 m/s accelerates to pass
a truck. Five seconds later the car is
moving 30 m/s. What is the acceleration
of the car?
A. 5 m/s
B. -5 m/s
C. -2 m/s
D. 2 m/s
Gooooo
Calculate the force that the 4kg block exerts on the 10kg block
The graph above represents a object moving
____
The velocity of the object is i
____
The acceleration of the object is ____
The object's velocity is positive and decreasing.
Its acceleration is negative.
Sam goes to a friend's house by bike. His friend's house is 350m away. The journey takes 50s. What is Sam's average speed?
Answer:
Sam's average speed was 7ms-1
Explanation:
speed= distance / time
speed= 350 / 50
speed= 7 metres per second.
A car travels along a straight road to the east for
100 meters in 4 seconds, then has to turn around
and goes back west for 50 meters in 1 second.
Determine average speed and average velocity.
Answer: 90 m/s, 70 m/s
Explanation:
Given
A car travels 100 m east for 4 seconds and then turn around
goes back west for 50m in 1 sec
Distance traveled in the east is [tex]100\times 4=400\ m[/tex]
Distance traveled in the west is [tex]50\times 1=50\ m[/tex]
Total distance[tex]=400+50=450\ m[/tex]
total displacement[tex]=400-50=350\ m[/tex]
total time [tex]t=4+1=5\ s[/tex]
Average speed
[tex]\Rightarrow s_{avg}=\dfrac{\text{distance}}{\text{time}}=\dfrac{450}{5}\\\\\Rightarrow s_{avg}=90\ m/s[/tex]
Average velocity
[tex]\Rightarrow v_{avg}=\dfrac{\text{displacement}}{\text{time}}=\dfrac{350}{5}\\\\\Rightarrow v_{avg}=70\ m/s[/tex]
After being pushed and released, a 50 kg crate slides across a factory floor. Friction on the sliding crate is 200 N, what is the crates acceleration ?
it is made up of small particles
Answer:
Everything is made up of tiny particles called Matter