Answer:
The car with the higher velocity would have a more impactful momentum.which vector is the sum of vectors a and b
Answer:
C
Explanation:
Vector A points up
Vector B points right
The combination must be both up and right which is C
4. Anaerobic exercise helps type 2 diabetes.
a. True
b. False
Answer:
true
Explanation:
b/c anaerobic exercis helps type 2 diabetes
A 700 kg car going 12 m/s speeds up to 30.6 m/s in 7 seconds. How much work was done to increase its speed?
Answer:
Approximately [tex]2.8 \times 10^{5} \; \rm J[/tex] (assuming that the car is moving on level ground, and that there is no friction to hinder the motion of the car.)
Explanation:
Formula for the kinetic energy, [tex]\rm KE[/tex], of an object of [tex]m[/tex] travelling at velocity [tex]v[/tex]:
[tex]\displaystyle \text{KE} = \frac{1}{2}\, m \cdot v^{2}[/tex].
Let [tex]v_1[/tex] and [tex]v_2[/tex] denote the velocity of this car before and after the acceleration.
Kinetic energy of this car before the acceleration:
[tex]\begin{aligned}\text{KE}_1 &= \frac{1}{2}\, m \cdot {v_1}^{2} \\ &= \frac{1}{2} \times 700\; \rm kg \times (12\; \rm m \cdot s^{-1})^{2} \\ &\approx 5.0 \times 10^{4}\; \rm J\end{aligned}[/tex].
Kinetic energy of this car after the acceleration:
[tex]\begin{aligned}\text{KE}_2 &= \frac{1}{2}\, m \cdot {v_2}^{2} \\ &= \frac{1}{2} \times 700\; \rm kg \times (30.6\; \rm m \cdot s^{-1})^{2} \\ &\approx 3.3\times 10^{6}\; \rm J\end{aligned}[/tex].
Assume that this car was travelling on level ground. Also assume that there is no friction to hinder the motion of this car. The work of the engine of this car would be equal to the amount of [tex]\rm KE[/tex] that the car has gained:
[tex]\rm KE_2 - KE_1 \approx 2.8\times 10^{5}\; \rm J[/tex].
True or false? In a linear relationship, a change in one variable will always result in a change of the
same size in the other variable.
The statement 'in a linear relationship, a change in one variable will always result in a change of the same size in the other variable' is FALSE.
What is a linear relationship?A linear relationship is a type of association between two variables where a change in one produces a direct modification in the another one.
A linear relationship may change depending on the rate of change and therefore the size of this variation is not the same.
In conclusion, the statement 'in a linear relationship, a change in one variable will always result in a change of the same size in the other variable' is FALSE.
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The momentum of a car traveling in a straight line at 20 m/s is 24,500 kg•m/s. What is the cars mass?
Answer:
p=mv
p=given=24500kg-m/sec
m=?
v=20m/sec
m=p/v
=24500kg-m/sec÷20m/sec
=1225kg=ans
Answer:
1225kg=ans
Explanation:
which statement identifies a reason to preserves wetlands
Answer:
They store floodwater
Explanation:
to transmit heat sound or electricity through a medium
Answer:Electrical conduction is the transfer of electrically charged particles through a medium, such as electricity traveling through the power lines in your house. Sound conduction (or acoustic conduction) is the transfer of sound waves through a medium, such as vibrations from loud music passing through a wall.
Explanation: Trust
The density of red wood is 15.27 g/cm'. A piece of red wood has the volume of 18.721 cm', what is the
mass?
The properties of metals depend mainly on the number and arrangement of neutrons
True
False
Answer:
False
Explanation:
Electrons
5. What is the frequency of a sound wave when the speed of the sound is 340 m/s and has a wavelength of 1.21 m?
Explanation:
v = f × /\
340 = 1.21f
f = 280.99Hz
What provides evidence that has helped earth scientists determine the age of the earth more precisely?
radioactive dating
atmospheric pressure
helium dating
earth’s distance from the moon
Answer:
the answer is radioactive dating
This diagram shows a heating curve for water.
At which segment does freezing occur?
The answer is B.) W-V
Hope this helps
Answer:
it is B
Explanation:
Because I agree with her and also got 100
An object is in motion if ___
Answer:
An object is in notion if its position change with time.
How do you think the poet represents the tiger in his poem (The Tyger)? please no bit ly links
Answer:
“The Tyger” represents the evil and beauty too, “the forest of the night” represents unknown challenges, “the blacksmith” represents the creator and “the fearful symmetry” symbolizes the existence of both good and evil. Imagery: Imagery is used to make the readers perceive things with their five senses.
Explanation:
A bat produces a sound at 17,250Hz and wavelength 0.019m. What is
the speed of the sound?
Explanation:
v = f × /\
v = 17250 × 0.019
v = 327.75ms²
A produces a sound at a frequency of 17,250 Hz and wavelength of 0.079 m then the speed of sound will be equal to 327.75 m/s².
What is Wavelength?The distance between two identical locations (adjacent crests) in successive cycles is known as the wavelength, and it is used to describe waveform signals that are transmitted over wires or into space. Typically, in wireless systems, this length is specified in meters (m), centimeters (cm), or millimeters (mm). The wavelength is more frequently described in nanometers (nm), which are units of 10⁻⁹ m, or angstroms, which are units of 10⁻¹⁰ m, for infrared (IR), visible light (UV), and gamma radiation.
As per the given information in the question,
Frequency, f = 17,250 Hz
The wavelength λ = 0.019 m
Then the speed of the sound (v) will be,
v = f × λ
v = 17250 × 0.019
v = 327.75 m/s²
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A 905 kg test car travels around a 3.25 km circular track. if the magnitude of the force that maintains the car's circular motion is 2140 N, what is the car's tangential speed?
You have two photos of a person walking. One shows the person at the corner of Third and Main streets, the other shows the person at the corner of Tenth and Main streets. There are lampposts at every corner in this town, and the first picture shows it to be 10:32:00 exactly. The second picture shows it to be 10:49:30. You know three facts: (1) All of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross Main in this area are numbered consecutively, with no interruptions. What is the person’s average speed in kilometers per hour?
Answer:
average speed
= [(10-3)/12 km] / [(49.5-32.0)/60 hour]
= 5*7 / 17.5
= 2 km/h .
7. It takes 1 second to hear the reflection of a loud noise made in front of a large barrier. If
the speed of sound in air is 340 m/s, how far away is the barrier?
A. 85 m
B. 170 m
C. 340 m
D. 680 m
Answer:
C 340 m
Explanation:
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What does mutate mean?
a)Change the DNA of your cells
b) Kill your DNA
c)Kill your cell
d)Change the cell
Answer:
A
Explanation:
Someone please help me figure this out
Answer:
the answer is A
Explanation:
hope this helps you will u plz mark me sa brainliest?
What force is caused by tiny collisions, called microwelds, on surfaces that
are stuck together?
A. heat
B. energy
C. air resistance
D. friction
Answer:
D. Friction
Explanation:
"Friction is caused by microwelds that form between two surfaces. Microwelds are stronger when the two surfaces are pushed together with a greater force." - ( Module 3 • Forces and Newton’s Laws) quoted
hope this helps and is right. p.s. i really need brainliest :)
Answer:
Friction
Explanation:
Took The Test
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A sound wave is made of a series of compressions and
a.
extensions.
c.
rarefactions.
b.
volumes.
d.
refractions.
Answer:
extensions.
Explanation:
Hope this helps
Answer:
extensions i think because sound waves travel through the air and to our ears so its extended
Explanation:
After the full moon, the moon begins its shrinking or_phases. During these phases, the light side of the moon is on the_
A. Waning, left
B. Waxing, right
C. Waxing, left
D. Waning, right
A person invested
$
8
,
900
$8,900 in an account growing at a rate allowing the money to double every 7 years. How long, to the nearest tenth of a year would it take for the value of the account to reach
$
20
,
600
$20,600?
Answer:
8.5
Explanation:
To the nearest tenth of a year, it would take around 9.1 years when calculate compoundly for the account's worth to reach $20,600.
What is Compound interest?A loan or investment's initial principal as well as any accrued interest from earlier periods are both taken into account when calculating compound interest.
To resolve this issue, we can apply the compound interest formula:
A = P(1 + r/n)nt
where:
A represents the balance of the account after t years.P stands for the initial outlay ($8,900 in this case).The annual interest rate is r, which is unknown.The number n determines how often interest is compounded each year (in this case, once every seven years because the value of the money doubles every seven years).The number of years is t.When A = $20,600, we need to determine t. Since we are aware that the initial investment would double after seven years, we can use the following formula to determine the yearly interest rate:
2 = (1 + r/n)^(nt)
If n is 1/7 (since the investment twice once every 7 years), 2 is the factor by which the investment doubles, and t is an unknown.
When we simplify this equation, we obtain:
t log(1 + r/7) = log(2)
When we solve for r, we get:
r = 7[(2^(1/t))-1]
Now that we have P, r, n, and A, we can enter them into the compound interest formula to find t:
$20,600 = $8,900(1 + r/1)^(1t)
2.318 = (1 + r)^t = log (2.318) / log (one plus r)
t is equal to log(2.318)/log(1 + 7[(2(1/t))-1]).
We can iteratively solve for t using a calculator, beginning with a first guess of 7 years (because the investment doubles every 7 years):
r = 0.0998 and A = $17,800 for t = 7 years
r = 0.0909 and A = $19,397 for t = 8 years.
r = 0.0833 and A = $20,416 for t = 9 years.
r = 0.0823 and A = $20,601 (closest to $20,600) for t = 9.1 years
As a result, it would take the account's value to reach $20,600 in around 9.1 years (to the nearest tenth of a year).
Therefore, when calculated compoundly, it would take approximately 9.1 years for the account's value to reach $20,600, to the nearest tenth of a year.
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A metal sphere of radius 10 cm carries a charge of 2.0 MicroCoulomb.What is the magnitude of the electric field 5.0 cm from the sphere's surface?
Answer:
E = 7200 J = 7.2 KJ
Explanation:
The electric field due to a sphere is similar to the electric field due to a point charge. It is calculated by the use of the following formula:
[tex]E = \frac{kq}{r^2}\\[/tex]
where,
E = Electric Field = ?
k = Coulomb Constant = 9 x 10⁹ Nm²/C²
q = charge on sphere = 2 μC = 2 x 10⁻⁶ C
r = distance from the center of the sphere to the location = 5 cm = 0.05 m
Therefore,
[tex]E = \frac{(9\ x\ 10^9\ Nm^2/C^2)(2\ x\ 10^{-6}\ C)}{(0.05\ m)^2}[/tex]
E = 7200 J = 7.2 KJ
¿Cuál es la formula para resolver la caída libre?
Caída Libre
h= v0 t+1/2 g t2
vf = v0 + g t
?
How many degrees equal π in radians? How many revolutions (turns) equal π radians?
Answer:
It follows that the magnitude in radians of one complete revolution (360 degrees) is the length of the entire circumference divided by the radius, or 2πr / r, or 2π. Thus 2π radians is equal to 360 degrees, meaning that one radian is equal to 180/π ≈ 57.295779513082320876 degrees.
Explanation:
Which event occurs during high tide?
All of Earth’s ocean levels rise.
The moon’s orbit is closer to Earth.
The gravity of the Sun and moon cause the Earth’s crust and water to bulge.
Earth’s crust and water are being pulled in opposite directions by the Sun and moon.
Answer:
(B) The moon’s orbit is closer to Earth.
Explanation:
Answer:
B
Explanation:
please answer this time question in do not send a link to an unknown website or you are getting reported.
(1) Use Newton's second law: The force F required to accelerate a mass m with acceleration a satisfies
F = m a
So the force needed to accelerate the lion-stretcher system is
F = (175 kg) (2 m/s²) = 350 N
(2) Average speed is defined as the ratio of distance traveled to the time it takes to travel that distance, so in this case the bus's average speed is
(280 km) / (4 h) = 70 km/h
(3) The vertical lines in the plot split up the distance function into 5-minute chunks. The one with the highest average speed is the one over which the distance changes the most. Roughly, the average speeds over each of the given choices is
• 0 to 5 min : (1500 m - 0 m) / (5 min) = 300 m/min
• 10 to 15 min : (3250 m - 2500 m) / (5 min) = 150 m/min
• 15 to 20 min : (3750 m - 3250 m) / (5 min) = 100 m/min
• 25 to 30 min : (4500 m - 4250 m) / (5 min) = 50 m/min
(4) Velocity is a vector, so it has both magnitude and direction. A car moving at constant velocity would be traveling at the same magnitude and direction. But a car on the circular track is constantly turning and changing direction.
All waves travel through a
Group of answer choices
frequency
conductor
medium
wave