Answer:
Pe= 2822.4
Explanation:
Use Pe=mgh and g=9.8
So, Pe=24kg(9.8)(12m) = 2822.4
What is the wavelength of a wave?
Researchers aboard the International Space Station use the latest technology to advance our understanding of which concept?
soil and rocks
health and medicine
electromagnetic spectrum
radio waves in space
Researchers aboard the International Space Station use the latest technology to advance our understanding of health and medicine. option B. This is further explained below.
What is health?Generally, wellness refers to a condition of absence of disease or harm.
In conclusion, The newest technological advances in health and medicine are being used by researchers on board the International Space Station. choice B
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Answer: health and medicine
Explanation:
A gazelle is running at 17.46 m/s. He sees a lion and accelerates at -1.49 m/s/s,
How fast is he running 2.39 seconds later?
Answer:
V=21.0211m/s
Explanation:
Use V=vi+at
So, V=17.46m/s+(1.49m/[tex]s^{2}[/tex])(2.39s)= 21.0211m/s
why does a ball at a higher height bounce more than a ball at a lower height when dropped?
Explanation:
let us asume 2 balls here,
ball 1 and ball2
ball 1 is dropped from the lower hight
which means it's potential energy is low,where as the ball2 is dropped from higher height
and potential energy is higher than the ball 1which means ball2 has more force
by newton's 3rd lawwhich is, to every action there is an opposite reaction!
thus ball2 will bounce more!
PLEASE HELP ME WITH THIS ONE QUESTION
What is the final temperature when 625 grams of water at 75.0° C loses 7.96 x 10^4 J? (cwater = 4186 J/kg°C)
Answer: 44.57°C
Explanation:
The following can be deduced from the question:
Specific heat of water = 4.186 J/kg
From the question, we can infer that 625 × 4.186 joules of heat will be lost when there's a 1°C drop of water.
We then calculate the amount if degrees that it'll take to cool for 7.96 x 10⁴J. This will be:
= 7.96 × 10⁴ /(625 × 4.186)
= 79600/(625 x 4.186)
= 79600/2616.25
= 30.43°C
The final temperature will then be:
= 75.0°C - 30.43°C
= 44.57°C
A 1500 kg sedan goes through a wide intersection traveling from north to south when it is hit by a 2500 kg SUV traveling from east to west. The two cars become enmeshed due to the impact and slide as one thereafter. On-the-scene measurements show that the coefficient of kinetic friction between the tires of these cars and the pavement is 0.750, and the cars slide to a halt at a point 5.48 m west and 6.37 in south of the impact point. How fast was sedan traveling just before the collision? How fast was SUV traveling just before the collision?
Answer:
v = 19.33 m / s South
Explanation:
To solve this exercise we must use the conservation of momentum, for which we must define a system formed by the two cars, therefore the forces during the collision are internal and therefore the moment is conserved.
Since it is a vector quantity, we are going to work on each axis, the x axis is in the East-West direction
initial instant. Before the crash
p₀ = m 0 + M v₂ₓ
final instant. Right after the crash
p_f = (m + M) vₓ
p₀ = 0_pf
M v₂ₓ = (m + M) vₓ
In this case m is the mass of the car and M the mass of the SUV
vₓ = [tex]\frac{M}{m+My}[/tex] v₂ₓ (1)
in the Y axis (North - South direction)
initial instant
p₀ = m v_{1y} + M 0
final moment
p_f = (m + M) v_y
p₀ = p_f
m v_{1y} + M 0 = (m + M) v_y
v_y = [tex]\frac{m}{m+M} \ v_{1y}[/tex] (2)
With these speeds we can use the relationship between work and the variation of kinetic energy, in this part the two cars are already united.
W = ΔK
friction force work is
W = - fr d
the friction force is described by the equation
fr = μ N
Newton's second law
N-W = 0
N = W
we substitute
W = - μ (m + M) g d
as the car stops the final kinetic energy is zero and
the initial kinetic energy is
K₀ = ½ (m + M) v²
we substitute
- μ (m + M) g d = 0 - ½ (m + M) v²
μ g d = ½ v²
v² = 2 μ g d
the distance traveled can be found with the Pythagorean theorem
d = [tex]\sqrt{x^2+y^2}[/tex]
d = [tex]\sqrt{5.48^2 + 6.37^2}[/tex]
d = 8.40 m
let's calculate the speed
v² = 2 0.75 9.8 8.40
v = √123.48
v = 11.11 m / s
this velocity is in the direction of motion so we can use trigonometry to find the angles
tan θ = y / x
θ = tan⁻¹ y / x
θ = tan⁻¹ (-5.48 / -6.37)
θ = 40.7º
Since the two magnitudes are negative, this angle is in the third quadrant, measured from the positive side of the x-axis in a counterclockwise direction.
θ'= 180 + 40.7
θ’= 220.7º
In the exercise they indicate the the sedan moves in the y-axis, therefore
sin θ'= v_y / v
v_y = v sin 220.7
v_y = 11.11 sin 220.7
v_y = -7.25 m / s
the negative sign indicates that it is moving south
To find the speed we substitute in equation 2
v_y = [tex]\frac{m}{m+M} \ v_{1y}[/tex]
v_{1y} = v_ y [tex]\frac{m+M}{m}[/tex]
let's calculate
v_{1y} = -7.25 [tex]\frac{1500+2500}{1500}[/tex]
v_{1y} = - 19.33 m/s
therefore the speed of the sedan is v = 19.33 m / s with a direction towards the South
Calculate the current flowing if a charge of 36 kilocoulombs flows in 1 hour.
Answer:
sorry I didn't get it, my apologies
A geosynchronous satellite orbits Mars (mass = 6.42 x 1023 kg) once every Martian day, 88640 s. At what radius does it orbit?
Answer:
angular speed ω = 2PI / T rad/sec
ω^2*r = M*G/r^2
r = ³√ M*G/ω^2 = ³√6.42*10^23*6.67*10^-11*88640^2/39.5 = 2.04*10^7 m
Explanation:
A geosynchronous satellite orbits Mars once every Martian day, 88640 s then the radius of the orbit will be equal to 2.04 × 10⁷ m.
What is gravity?The fundamental force of attraction operating on all matter is recognized as gravity, also spelled gravity, in mechanics. It has no impact on identifying the interior properties of common matter because it is the weakest force known to exist in nature.
As per the given data in the question,
Mass, m = 6.42 x 10²³ kg
Time, T = 88640 s
Use the formula of velocity for satellite,
v = 2πR/T
Where R represents the radius
Use the formula of centripetal acceleration,
[tex]a_c[/tex] = v²/R
Thus;
[tex]a_c[/tex] = (2πR/T)²/R
= 4π²R/T²
The formula for gravitational acceleration is:
[tex]a_g[/tex] = Gm/R²
G = 6.674 × 10⁻¹¹ m³/kg. s²
Now, the satellite's gravitational acceleration is what is responsible for its centripetal acceleration. Thus,
Centripetal acceleration = gravitational acceleration.
Thus;
4π²R/T² = Gm/R²
Making R the subject gives;
R = ∛(GmT²/4π²)
Substitute the values in the above equation,
R = ∛((6.674 × 10⁻¹¹ × 6.42 x 10²³ × 88640²)/(4 × π²))
R = 2.04 × 10⁷ m
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How does wavelength change depending on whether the pipe is open or closed?
Answer:
* in a tube with both ends open
λ = 2L / n n = 1, 2, 3,…
* tube with one end open and the other closed.
λ = 4L / n n = (2n ’+ 1 )
Explanation:
When a sound wave enters a pipe, a resonance process occurs, whereby only some wavelengths can occur.
* in a tube with both ends open
in this case there are maximums at each end, so if the length of the had is L
λ = 2L 1st harmonic
λ = 2 L / 2 2nd harmonic
λ = 2L / 3
λ = 2L / n n = 1, 2, 3,…
* In the case of a tube with one end open and the other closed.
At the open end there is a belly and at the closed end a node
λ = 4L 1st harmonic
λ = 4L / 3 3rd harmonic
λ = 4L / 5
λ = 4L / n n = 1, 3, 5,… odd
n = (2n ’+ 1 ) where n’ are all integers
PLEASE HELP ME WITH THIS ONE QUESTION
The speed of sound at an elevation of 40,000 feet, where many aircraft fly, is 295 m/s. If an airplane is flying at Mach 0.92 at this altitude, how fast is the airplane traveling in meters per second?
Answer:
The plane travels at a rate of 313 meters per second.
Explanation:
Since the speed of sound at an elevation of 40,000 feet, where many aircraft fly, is 295 m / s, if an airplane is flying at Mach 0.92 at this altitude, to determine how fast is the airplane traveling in meters per second you must perform the following calculation:
1 Mach = 1,225.04 km / h
1 km = 1,000 m
1 h = 3,600 sec
1 = 1225.04
0.92 = X
0.92 x 1225.04 = X
1,127.03 = X
(1,127.03 x 1,000) / 3,600 = X
1,127,030 / 3,600 = X
313.06 = X
Thus, the plane travels at a rate of 313 meters per second.
Antonym for Radiation lol
Answer:
convergence is the correct answer
Answer:
absorption, concealment, containment, refrain, repression, suppression, withholding, confinement, restriction, constraint
wait no....
diffusion, emission, polarization, spread, ramification, divarication, propagation, transmission, broadcast, circulation and dissipation.
LOL
PLEASE HELP!!!!!!
Is this correct?
A 2000 Kg car going 20 m/s crashes into a wall. What is the force of the car on the wall?
Answer:
40,000N
Explanation:
Force = Acceleration × Mass
2000×20=40,000
Tell me, Is universe created due to big bang???? Plz I want a bunch of para
Answer:
shreya Sister's answer is correct hope it's help you have a good day
What do we call a collection of matter that does not interact with anything
else in the universe?
A. The forces that act in a collision
B. An intergalactic highway
C. An isolated system
D. A system in which collisions always occur
Answer: an isolated system
Explanation:
the long-term average weather for a region is called
Answer:
Climate.
Explanation:
Weather can be defined as the atmospheric conditions of a particular area over a short period of time.
The elements of weather include precipitation, wind, temperature, atmospheric pressure, relative humidity, cloud, and wind speed.
The long-term average weather for a region is called climate.
This ultimately implies that, when the average atmospheric conditions prevailing in a specific region persists for a very long period of time, it is known as climate.
A 10.0 kg mass is lifted 5.0 m above the ground.
Find the change in gravitational energy.
Answer:
500 J
Explanation:
formula of Energy is: E=mass*height*g, where g≈10 (m/s²).
according to the formula above: E=10*5*10≈500 (J)
This glass of lemonade is sitting in the hot summer sun. As time passes, in which direction will heat transfer take place?
A.
ice → lemonade
B.
lemonade → air
C.
air → lemonade
D.
ice → straw
E.
ice → air
Answer:
c
Explanation:
Answer:
the answer to your question is c
Explanation:
what is resistance
Answer:
Resistance is the measure of the opposition to current flow in an electrical circuit
Resistance refers to the opposition or hindrance that a material or object offers to the flow of electric current. It is a fundamental concept in the field of electrical engineering and physics.
Resistance is measured in ohms (Ω) and is denoted by the symbol "R."
In electrical circuits, resistance is caused by various factors, including the type of material, its dimensions, and its temperature.
The primary element contributing to resistance is the collisions between electrons and atoms within the material through which the current is passing.
When an electric current flows through a conductor, such as a wire, the electrons move along the path of the conductor. However, as they do so, they encounter resistance.
This resistance causes the electrons to collide with atoms, which generates heat and dissipates energy.
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A deer is walking at 2.27speeds up to 13.42 m/s, covering a distance of 53.2 meters during this acceleration. How much time did it take him to do this.
Answer:
t=3.964s
Explanation:
Use t=d/s
t=53.2m/13.42m/s= 3.964s
Emma draws another diagram showing how adding energy affects this wave. How does her new diagram compare to this diagram?
A
Her diagram shows higher wavelengths.
B
Her diagram shows lower wave amplitudes.
С
Her diagram shows lower wave frequencies.
D
Her diagram shows higher wave amplitudes.
HELPPPP MEEE PLEASEEEE 55 POINTS!!!
A student determines that a sample has a mass of 157.2 g and a volume of 20 cm^3. Which
substance from the table is the student analyzing?
Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!
linkcutter.ga/gyko
A locomotive is pulling 19 freight cars, each of which is loaded with the same amount of weight. The mass of each freight car (with its load) is 37,000 kg. If the train is accelerating at on a level track, what is the tension in the coupling between the second and third cars? (The car nearest the locomotive is counted as the first car, and friction is negligible.)
Explanation:
The tension between cars 2 and 3 accelerates cars 3 through 17. That is a total of 15 cars.F = M*a, with M = 15*37,000 = 555*10^3 kga = 0.7 m/s^2Solve for F, in Newtons
If Manuel exerts a force of 10 N to push a desk to the right at the same time Lynn exerts a force of 15 N to push the desk to the left, the desk will move to the
left
right
sideways
it won't move
Answer:
The desk will move to the left.
Explanation:
Since Manuel is exerting a force of 10 N to the right, and Lynn is exerting a force of 15 N to the left, it means that Lynn is exerting a force of 5 N more than Manuel, meaning that the desk will move to the left, the direction Lynn is pushing it too.
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Hope it helps!
The kinetic energy of an object is equal to one half Its mass multiplied by its
speed
A squared
B cubed
C to the fourth power
D to the fifth power
Block A of mass 2.0 kg is released from rest at the top of a 3.6 m long plane inclined at an angle of 30o, as shown in the figure above. After sliding on the horizontal surface, block A hits and sticks to block B, which is at rest and has mass 3.0 kg. Assume friction is negligible. The speed of the blocks after the collision is most nearly
The speed of the blocks after the collision is most nearly will be Vf= 2.376 m/s.
What is collision?Collision is defined as when two bodies of different masses move towards each other with a particular speed, then there will be three cases after the collision.
Elastic collision, in which the kinetic energy of the object remains constant.
Inelastic collision in which the kinetic energy is not conserved after the collision.
Completely elastic collision, in which the masses stick together after the collision and move with a final speed.
It is given in the question that
Mass of body A= 2 kg
Velocity of body A= ?
Mass of body B=3 kg
Velocity of body B= 0 m/s
since the body is coming from the inclined place at an angle 30 so the height will be calculated as:
[tex]\rm Sin\theta=\dfrac{h}{H}[/tex]
Inclined plane H=3.6 m
[tex]\rm Sin30=\dfrac{h}{3.6}[/tex]
[tex]h=1.8 m[/tex]
Now the initial velocity of the object from the conservation of energy
[tex]m_Agh=\dfrac{1}{2}m_Av_A^2[/tex]
[tex]v_A=\sqrt{2gh[/tex]
[tex]v_A=\sqrt{2\times9.81\times 1.8}=5.94\ \frac{m}{s}[/tex]
Now form the collision is completely elastic so the momentum before collision will be equal to after collision.
[tex]m_Av_A+m_Bv_B=(m_A+m_B)v_f[/tex]
[tex](2\times 5.94)+(3\times0)=(2+3)v_f[/tex]
[tex]v_f=\dfrac{11.88}{5}=2.376\ \frac{m}{s}[/tex]
Thus the speed of the blocks after the collision is most nearly will be Vf= 2.376 m/s.
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What is the mass of a 5kg object on the Moon?
The mass of a 5kg object is 5kg. Makes no difference where it happens to be located.
Answer:
The mass of a 5kg object is 5kg
Explanation:
Have a great day
PLEASE HELP!!!! WILL GIVE BRAINLIEST!!!!
Do you think that Franklin actually performed the kite experiment? Why or why not?
Answer:
He not only hypothesized that lightning and electricity were linked, but that metal objects could be used to draw lightning in order to protect homes from being hit. But Franklin didn't feel that he could get his conductor high enough into the clouds to do any good, so he never completed the experiment.
Explanation:
there ya go :)
Which statement best defines constructive interference? O Energy reflects back toward the source of its power. O Two waves with identical crests and troughs meet. thing O A wave appears to be at a standstill and vibrates in place O The trough of one wave matches the crest of another.
Answer:
when the trough of one wave matches the crest of another
Explanation:
just took the test
this is what I need help with
Answer: transverse wave
Explanation: the particles are moving up and down