A book with a mass of 1 kg is sitting on a desk. How much gravitational force is acting on the book? 1N 0 N 9.8 N 0.98 N
The gravitational force is always equal to the mass times the acceleration due to the gravitational force:
⇒ In this case
mass: 1 kgacceleration due to gravitational force: 9.8 m/s²Let's calculate:
[tex]Gravitational_.Force = 1kg*9.8m/s^2=9.8N[/tex]
Answer: 9.8 N
Hope that helps!
Find the wavelength of a sound moving in air at 43.2 m/s and that has a frequency of
2.11 hz.
a. 20.47
b. 91.152
c. 0.0488
d. 177.35
please help!!
Answer:
a.) 20.47 mExplanation:
Here we are given sound moving in air at 43.2 m/s and that has a frequency of 2.11 hz and we need o calculate the Wavelength.
Using formula:
[tex] \\ \: \: \longrightarrow \: \: \:{ \underline{ \boxed{ \sf Frequency = \dfrac{Wave \: speed}{Wave \: length}}}} \\ [/tex]
Where,
Frequency = 2.11 HzWave speed = 43.2 m/sOn Substituting the values, we get:
[tex]\\ \sf \: \: \: \longrightarrow \: \: \: 2.11 = \dfrac{43.2}{Wave \: Length} \\ \\ \\ \sf \: \: \: \longrightarrow \: \: \:Wave\: Length = \frac{43.2}{2.11} \\ \\ \\ \sf \: \: \: \longrightarrow \: \: \:{ \pink{ \underline{Wave \:Length = 20.47 m}} }\\ \\ [/tex]
Hence,
Wavelength of a sound moving in air is 20.47 m[tex]\large\boxed{\bold{Formula: λ= \frac{v}{f}}}[/tex]
In this question all the values are given so we'll simply have to substitute the values and solve.
Let's solve!
We'll have to divide the velocity or speed by the frequency.
Substitute the values according to the formula.
[tex] λ= \frac{43.2}{2.11}[/tex]
Calculator answer:
[tex]\bold{λ= 20.47393365 \: m}[/tex]
Now, we can round off to the nearest hundredth.
The value in the thousandths place is smaller than 5 so we won't have to round up.
Final answer:
[tex]\large\boxed{\bold{λ= 20.47 \:m}}[/tex]
Therefore, the wavelength is 20.47 meter.
Answer: Option A
do you expect an echo to return to you more quickly on a hot day or a cold day?
Answer:
more quickly on a hot day
Explanation:
2 Using the formula GPE = mxgxh, what are
you solving for?
A. Potential Energy
B. Kinetic Energy
C. Electromagnetic Energy
D. Mass Energy
Answer:
A
Explanation:
THAT is th equation for Potential Energy
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Second choice
Explanation:
I suppose ME is the same as POTENTIAL energy
ME = mgh = 70 * 10 * 12 = 8400j
Half way down, 4200 j is converted to Kinetic Energy
1/2 m v^2 = 4200
1/2 (70) v^2 = 4200 v = 10.95 m/s
Just before impact ALL of the 8400 j is now KE
1/2 (70)v^2 = 8400 v = 15.49 m/s
1. Endorphins
2. Cardiovascular
3. Endurance
4. Muscular
5. Aerobic
chemicals your brain releases when you exercise
the ability to last a long time without tiring
using your heart, lungs and blood vessels
using oxygen
using your muscles
can u help me match them
______ is how something feels.
Color
Volume
Length
Temperature
Texture
Answer:
Texture is how something feels.
Which rocket has the highest acceleration?
A.Rocket 3
B.Rocket 1
C.Rocket 4
D.Rocket 2
Answer:
Rocket 4
Explanation:
since it has the smallest mass it is going to the bigger acceleration.
Answer:
C
Explanation:
In theory, rocket 4 has the least mass and highest force output in comparison.
Station A
? Arrival Time for P Wave
minu
? Arrival Time for 5 Wave
? S-P Lag Time (secs)
? Distance from Epicenter (km)
30
Station B
TIME(econd
Station B
? Arrival Time for P Wave
wwwwwwww
? Arrival Time for S Wave
? S-P Lag Time (secs)
? Distance from Epicenter (km)
30
TIME (second)
-Buon C
Station C
? Arrival Time for P Wave
10
призми мили
? Arrival Time for S Wave
? S-P Lag Time (secs)
100
300
200
Distance from Epicenter
? Distance from Epicenter (km)
90
TIME (second)
NOW: Use your information above to determine which earthquake these seismographs represent. Check the correct box!
90
2
8
8
*PART THREE:
MYSTERY EARTHQUAKE
/Mark the start of the P Wave AND S Wave
Find the Lag Time
Use the Lag Time Graph to determine each
Stations' distance to the epicenter.
Based on the Distances, choose which map
depicts your earthquake!
Graph
Lag time of S-wave behind P-wave
(seconds)
100 0
8
Nasme
8
Could a person survive in a falling lift if they jumped as it hits the ground?
Answer:
Expect a broken leg or two, but you'll live, Some part of your body must absorb the impact, but head injury is the primary cause of death in falls.
Explanation:
Which order is the brightest?
n = 0
n = 1
n = 2
The order of band in which the light becomes the brightest is n = 0.
What is diffraction?
Diffraction is the phenomena of the spreading of waves around obstacles. Diffraction occurs in electromagnetic radiation, such as light, X-rays, and gamma rays, etc.
When light waves pass near a barrier they tend to bend around that barrier and become spread out.
The order bands n=2 becomes dimmest due to the spreading out of the light wave.
Thus, the order of band in which the light becomes the brightest is n = 0.
Learn more about diffraction here: https://brainly.com/question/9892130
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n = 0 is correct for edge. :)
What is the mass of a bullet moving at 970 m/s if the bullet’s kinetic energy is 3.0 x 10^3 J?
The mass of the bullet moving at the given values of velocity and kinetic energy is 6.4 × 10⁻⁴ kilogram.
What is Kinetic Energy?Kinetic energy is simply a form of energy that a particle or object possesses due to its motion.
It is expressed as;
K = (1/2)mv²
Where m is mass of the object and v is its velocity.
Given the data in the question;
Velocity of the bullet v = 970m/s Kinetic energy of the bullet K = 3.0 × 10³J = 3000kgm²/s²Mass of the bullet m = ?We substitute our given values into the expression above.
K = (1/2)mv²
3000kgm²/s² = 0.5 × m × (970m/s)²
3000kgm²/s² = 0.5 × m × 940900m²/s²
3000kgm²/s² = m × 470450m²/s²
m = 3000kgm²/s² ÷ 470450m²/s²
m = 0.00064kg
m = 6.4 × 10⁻⁴kg
Therefore, the mass of the bullet moving at the given values of velocity and kinetic energy is 6.4 × 10⁻⁴ kilogram.
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Urgent help needed in number four.
Thank you in advance!
The energy produced by the headlamp at the end of 5 minutes is determined as 1,440 J.
Energy supplied by the lamp
The energy supplied by the lamp is calculated as follows;
E = Pt
E = IVt
where;
I is current = 0.4 AV is voltage = 12 Vt is time = 5 mins = 5 x 60 s = 300 sE = 0.4 x 12 x 300
E = 1,440 J
Thus, the energy produced by the headlamp at the end of 5 minutes is determined as 1,440 J.
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2. What particle completes this equation?
Answer:
C it's a balanced equation of Helium gas
A 0.025 kg piece of clay is thrown into a wall and has a speed of 9 m/s before it strikes the wall. Find the
change in momentum, of the clay and the impulse exerted on the clay if it does not bounce from the wall.
Answer:
The impulse experienced by the object equals the change in momentum of the object. In equation form, F • t = m • Δ v. In a collision, objects experience an impulse; the impulse causes and is equal to the change in momentum.
Explanation:
When A 0.025 kg piece of clay is thrown into a wall and has a speed of 9 m/s before it strikes the wall then change in momentum 22.5 kg.m/s² is and impulse is 0.225 Ns.
What is Momentum ?Momentum is defined as product of mass and velocity of the body. It is denoted by letter p and it is expressed in kg.m/s.
Mathematically p = mv.
it discuss the moment of the body. body having zero mass or velocity has zero momentum.
The dimensions of the momentum is [M¹ L¹ T⁻¹].
Given,
mass of the clay = 0.025 Kg
Speed of the clay = 9m/s
The momentum of clay is P = mv = 0.025×9 =0.225 kg.m/s
In this problem a piece of clay having mass 0.025 Kg, velocity of clay is 9m/s.
By using formula,
change in momentum of the clay = dp/dt
We must know about change in time in order to calculate change in momentum with respect to time.
Consider that the change in momentum is 0.01s.
dp/dt = p₂-p₁/t₂-t₁ = 0- 0.225/0.01 = 22.5 kg.m/s²
Impulse = dp/dt×Δt = 22.5×0.01 = 0.225 Ns
To know more about impulse :
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A graphic organizer is a written out explanation of similarities and differences among topics.
Answer:
False
Explanation:
A graphic organizer is a written out explanation of similarities and differences among topics. A graphic organizer is a visual representation. Another name for a chart is "Venn diagram." Compare and contrast graphic organizers identify only similarities among sets of information.
What is an enzyme and what is it from
Answer:
Enzymes help break down food that we consume. They are found in the stomach or small intestine.
What are the characteristics of the bowling ball that give it lots of momentum?
a. it's big
b. it's heavy
c. it's moving quickly
Answer:
b i think
Explanation:
Where does energy go after it hits gas?
In gasoline-powered vehicles, most of the fuel's energy is lost in the engine, primarily as heat. Smaller amounts of energy are lost through engine friction, pumping air into and out of the engine, and combustion inefficiency.
Calculate the molar mass of glucose
Let's calculate
[tex]\\ \rm\Rrightarrow C_6H_{12}O_6[/tex]
[tex]\\ \rm\Rrightarrow 6(12)+12(1)+6(16)[/tex]
[tex]\\ \rm\Rrightarrow 72+12+96[/tex]
[tex]\\ \rm\Rrightarrow 180g/mol[/tex]
Which of the following is NOT true in terms of what to consider when judging eye witness accounts?
the type of crime and how the witness saw the incident
interviewing techniques can affect eye witness accounts
open-ended questions do not often get better answers
The statement that is not true about in
terms of what to consider when judging eye witness accounts is the type of crime and how the witness saw the incident.
What is Judgement?Judgement is a decree, or decision or conclusion on a subject matter when there is an offence or someone did wat is wrong . It can be to vindicate and to punish for a crime.
Therefore, The statement that is not true about in terms of what to consider when judging eye witness accounts is the type of crime and how the witness saw the incident
Learn more about judgement below.
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if it takes you 10 n of force to push your bike 30 m how much work did you do>
Answer:
300 J
Explanation:
GIVEN:
Force (F) = 10 N
Displacement (s) = 30 m
or displacement (d) = 30m
Work done (W) = ?
Therefore,
W = F×s
or W= F × d
= 10×30
= 300 J
Hope it helps
how are the magnetic domains of a magnet different from the domains of an ordinary piece of metal?
Describe the differences between the energy, spacing, andmovement of molecules in a solid, a liquid, and a gas.
At high speeds, gas vibrates and moves freely. The liquid vibrates, moves about, and slides past one another. Solids vibrate (jiggle) but do not move from one location to another.
When boarding an airplane you bring a bag of chips. While in flight the bag puffs up, because suction is occurring. air pressure is affected by the Bernoulli principle. air pressure in the air-tight bag is greater than cabin air pressure. all the above none of the above
Answer:
air pressure in the air-tight bag is greater than cabin air pressure
Explanation:
What is the speed of an electromagnetic wave traveling through the air?
use c = 299,792,458 m/s in your calculation.
The speed of an electromagnetic wave traveling through the air will be 2.9 ×10⁸ m/sec.
What is a refractive index?The refractive index of a substance also known as the refraction index or index of refraction is a dimensionless quantity that specifies how quickly light passes through it in optics.
The refractive index is found as;
[tex]\rm n= \frac{c}{v} \\\\ 1.000293=\frac{3 \times 10^8}{v} \\\\ v=2.9 \times 10^8 \ m/sec[/tex]
Hence, the speed of an electromagnetic wave traveling through the air will be 2.9 ×10⁸ m/sec.
To learn more about the refractive index refer to the link;
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A stone is thrown horizontally at 15 m/s from the top of a cliff. It takes it 2.4 s to hit the ground. How far from the base of the cliff does the stone hit the ground
sound travels faster in air if the air temperature is:
is space expanding within clusters of galaxies? why or why not?
No, since their gravity is powerful enough to keep them together even while the universe expands as a whole. Space is not expanding within clusters of galaxies.
What is a galaxy?A galaxy is a massive clump of gas, dust, and billions of stars and their solar systems bound together by gravity.
No, since their gravity is powerful enough to keep them together even while the universe expands as an entire.
Hence,space is not expanding within clusters of galaxies.
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We can expect the force of friction to be greater for an object moving on a surface if the surfaces in contact are
a) smooth and the object is heavier
b) smooth and the object is lighter
c) rough and the object is heavier
d) rough and the object is lighter
Answer:
c
Explanation:
Friction is caused by how rough and object is, and how much the object weighs, as this causes it to drag more.
