Explanation:
incomplete question graph / fig is not available
a body of mass 10kg moving with a velocity 4m/s strikes a vertical wall horizontally and returns back with same velocity. find the impulse exerted on the wall if the time of contact is 0.02s
Answer:
1.96Ns
Explanation:
Impulse = Ft = m(v-u)
Impulse = Force * time
Impulse = mgt
Impulse = 10 * 9.8 * 0.02
Impulse = 98*0.02
Impulse = 1.98Ns
Hence the impulse exerted is 1.96Ns
What happens to the molecules when the liquid changes phase?
Answer:
A phase change is occuring; the liquid water is changing to gaseous water, or steam. On a molecular level, the intermolecular forces between the water molecules are decreasing. The heat is providing enough energy for the water molecules to overcome these attractive forces.
Explanation:
Over many years a limestone surface is exposed to slightly acidic rain. Which result is likely to occur in the limestone
Answer:
calcium carbonate is transformed into calcium sulfate
Explanation:
Limestone stones are formed by calcium carbonate (Ca Co3), when acid rain falls with a little H2SO2, a chemical reaction of the type
Ca Co3 + H2SO4 → CO2 + H2O + CaSo4
Calcium sulfate is much weaker than alatium carbonate, which is why the stone tends to break under its weigh
Describe how sound signals can be transmitted from a radio station and received on a radio at your home. Create a labeled diagram that shows this process
Answer:
The person above is right.
Explanation:
You just need to type in sound signals transmitted from a radio station and received on a radio at your home to find a diagram https://flypaper.soundfly.com/wp-content/uploads/2019/03/am.gif
A 2.75 kg block is pulled across a flat, frictionless floor with a 5.11 N force directed 53.8° above horizontal. What is the total force acting on the block? (total force = N)
Answer:
F = 3.01 N
Explanation:
Given that,
Mass of a block, m = 2.75 kg
Force applied to the block, F = 5.11 N
It is directed 53.8° above horizontal.
We need to find the total force acting on the block. The force acting on it is given by :
[tex]F=F\cos\theta\\\\F=5.11\times \cos53.8\\F=3.01\ N[/tex]
So, 3.01 N of force is acting on the block.
3.01 works as the right answer
About 50 000 years ago, in an area located outside Flagstaff, Arizona, a giant
4.5 x 107-kg meteor fell and struck the earth, leaving a 180-m-deep hole now
known as Barringer crater. If the meteor was traveling at 20 000 m/s upon
impact, with what average force did the meteor hit the earth?
Answer:
F_A =5.625*10^1^6N
Explanation:
From the question we are told that
50,000 years ago,
A giant 4.5 107-kg meteor
180-m-deep hole
20,000 m/s
Generally for this problem the energy change is given as
\triangle E=\frac{1}{2} mv^2 +mgd△E=
2
1
mv
2
+mgd
Having the potential and kinetic energy in place
Mathematically solving for Average forceF_AF
A
\triangle E=F_a*d△E=F
a
∗d
F_A =\frac{1/2* 4.5*10^7(20,000)^2-kg+4.5*10^7*9.81*160}{160}F
A
=
160
1/2∗4.5∗10
7
(20,000)
2
−kg+4.5∗10
7
∗9.81∗160
Therefore Average force F_AF
A
is given by
F_A =5.625*10^1^6N
A shopkeeper uses a force of 50N to lift a box to a shelf 1.5m high. How much work is done?
Which has more momentum a 100 kg kid riding a bike 10m/s or a 5000 kg truck barley rolling at 0.1 m/s
Answer:
The momentum of bike is more.
Explanation:
Given that,
Mass of the kid, m = 100 kg
Speed of the bike, v = 10 m/s
The momentum of the kid is given by :
p = mv
So,
p = 100 kg × 10 m/s
p = 1000 kg-m/s
Mass of the truck, m = 5000 kg
Speed of the truck, v = 0.1 m/s
The momentum of the truck is given by :
p = 5000 kg × 0.1 m/s
= 500 kg-m/s
So, the momentum of the kid riding a bike is more than that of the truck.
What is the mass of a tennis ball traveling with a velocity of 3 m/s and a momentum of
0.25 m/s? (1 point)
a. 0.08 kg
b. 0.5 kg
c. 9 kg
d. 18 kg
Answer:
Explanation:
P = mv
m = P/v
m = .25/3 = .08 Kg ... A
the force that works against motion and tries to slow objects down is called
A.acceleration
B.Gravity
C.friction
D.Speed
Answer:
C.friction
Explanation:
What is the potential difference when the current in a circuit is 5mA and resistance is 30 Ohms
[tex] \sf• \: The \: current \: in \: a \: circuit \: is \: 5 \: amps. \: and \: resistance \: is \: 30 \: Ohms.[/tex]
[tex] \\ [/tex]
[tex]\bf{ \underline{To \: Find :- }}[/tex][tex] \sf{• \: The \: Potential \: Difference. }[/tex]
[tex] \\ [/tex]
[tex] \huge\bf{ \underline{ Solution:- }}[/tex]
[tex] \sf According \: to \: the \: question, [/tex]
[tex] \sf• \: Current \: (I) = 5 \: Amps.[/tex]
[tex] \sf• \: Resistance \: (R) = 30 \: Ω[/tex]
[tex] \sf{Potential \: difference \: means \: Voltage \: ( V).}[/tex]
[tex] \sf{We \: know \: that, }[/tex]
[tex] \bf \red{ \bigstar{ \: V = IR }}[/tex]
[tex] \rightarrow \sf V =5 \times 30[/tex]
[tex] \rightarrow \sf V =150[/tex]
[tex] \\ [/tex]
[tex] \sf \purple{Therefore, \: the \: potential \: difference \: is \: 150 \: v \: .}[/tex]
please answer correctly
Answer:pretty sure it’s 3
Explanation:
A boy of mass, m weights 895 N. What is his mass, m?
a) 895 kg
b) 8.95 kg
c) 89.5 kg
d) None of the above
Answer:
One: either C or D. I can't give you a definite answer. See below.
Two: D
Explanation:
One
F = m * a
F = 895 N
a = 9.8
m = F/a
m = 895/9.8
m = 91.82
This turned out to be a very nasty little question. I don't know how you should answer it. The closest answer is C but is it close enough? You have to decide if you've had approximation questions before. If you have, C is the answer. If not then D is what you should choose.
Two
The answer is III and IV which makes it D
what percentage of americans get no exercise in a day
Answer:
95%
Explanation:
Answer:
0%
Explanation:
im not sure kasi i dont understand the question.....
Wires provide the pathway to carry the electricity from components to components. * 1 point true false
Answer:
true
Explanation:
as long as it is the right conductive material
PLS HELP WITH THIS FOR BRAINLIST IF ITS RIGHT
Answer:
the first one is Primary
the second one I think it's Mature but I don't know
a screwdriver wheel has a radius of 5cm while the axle has a radius of .5cm. what is the mechanical advantage of the screwdriver?
Answer:10cm
Explanation:5 / .5=10
A car is travelling to the right with a speed of 40 m/s when the driver slams on the brakes. The car skids for 4 s with constant acceleration before it comes to a stop. What was the rate of the car's acceleration as it skidded to a stop?
Answer:
10m/s^2
Explanation:
Given data
velocity= 40m/s
time= 4 seconds
Acceleration a =????
We know that
a= velocity/time
substitute
a=40/4
a= 10m/s^2
Hence the acceleration will be 10m/s^2
Please answer I need help
Answer:
I have attached a picture of me explaining the answers in written format. Hope this helps, thank you !!
A cars velocity changes from 0 m/s to 30 m/s in 10 seconds. Calculate acceleration.
Answer:
3 m/s^2
Explanation:
acceleration = vf-vi/t = (30 m/s-0 m/s)/10 s = 3 m/s^2
100 POINTS!!!!! YES,!!!!!!!! I SAID !!!!!!!100 POINTS!!!!!!!! FIRST TO ANSWER IT CORRECTLY AND ILL GIVE BRAINLY (LOOK IN THE TWO PICS TO FIND AND THE CORRECT ANSWERS)!!!!!!!!
"thanks for the points!!! and have a (terrible) day" - puppetasap4 :)
Answer:
"thanks for the points!!! and have a (terrible) day" - puppetasap4 :)
Explanation:
what are two reasons communication is important in scientific research
Answer:
It allows them to write better and more comprehensible research papers. As well as being able to communicate the relevance and impact of their ideas and discoveries.
Explanation:
What is the difference between a pure
substance, solution, and mixture?
A pure substance cannot physically be separated, and is made out of one atom (or molecule). Unlike a mixture, however, which are made out of two or more atoms or molecules. A solution in itself is the example of a mixture. (The composition of a pure substance being fixed, and a mixture's being varying depending on which.) And a solution branching off from a mixture into being either homogeneous mixtures or heterogeneous mixtures.
srry it kinda turned into a paragraph lol, feel free to add or take away anything :)
what is the acceleration of a football (.43kg) thrown with a force of 25N
Answer:
Explanation:
Newton's 2nd Law
F = ma
25 = (0.43)a
a = 58.14 m/s^2
What is the atomic mass of fluorine rounded to the nearest whole number?
Answer:
195
Explanation:
What are the dangers of a thunderstorm and how do you stay safe during the thunderstorm?
Answer:
you get struck by lightning
Explanation:
hide in ur house
Help me please....
Fill in the blanks:
1. Time taken by an object to complete one oscillation is called
Answer:
1) Time period
2) amplitude
3) Hertz or hz
4) Noise
5) frequency
6) infrasonic and ultrasonic
7) solid liquid and gas
8) A man
9) energy
10)1 vibration per minute
Answer: Time taken by an object to complete one oscillation is called time PERIOD.
Explanation:Hope this helps!! Brainlist?plz I need it
I WILL GIVE BRAINLIEST!!!
Answer:
is that high school work??? cause I don't know it and I'm about to go to high school
Describe the universe and its components
The universe is a vast expanse of space.
Some components are planets, stars and galaxies.
hope that helped.
A 34.00 kg sample of mud has a specific heat of 2,512 J/kg °C.
If sunlight striking the mud supplies it with 1,069,546 J of energy, by how much does the mud's temperature increase?
A.
166°C
B.
12.52°C
C.
31.53°C
D.
79.02°C
Answer:
B ig lol
Explanation: