Answer:
d = s • t
3m/s • 45s and and the seconds will cancel out.
135 meters
Answer:
velocity=3m/s
time=45sec
displacement=?
Explanation:
we have
velocity=displacement/time
3m/s=displacement/45
displacement=3×45=135m
Mikel runs 135m far.
two 100 kg astronauts are floating in space. the first astronaut is moving at 5 m/s while the second is at rest. the two astronauts collide. both astronauts are moving at 3 m/s. based on the information provided, which of the following statements is true?
Answer:
The true statement is;
Neither momentum or kinetic energy is conserved
Explanation:
The question relates to the verification of the conservation of linear momentum, and kinetic energy
The given parameters are;
The mass of each astronaut = 100 kg
From which, we have;
The mass of the moving astronaut, m₁ = 100 kg
The mass of the stationary astronaut, m₂ = 100 kg
The initial velocity of the moving astronaut, v₁ = 5 m/s
The initial velocity of the stationary astronaut, v₂ = 0 m/s
The final velocity of both astronauts, v₃ = 3 m/s
The sum of the initial momentum of both astronauts is given as follows;
[tex]P_{initial}[/tex] = m₁·v₁ + m₂·v₂ = 100 kg × 5 m/s + 100 kg × 0 m/s = 500 kg·m/s
[tex]P_{initial}[/tex] = 500 kg·m/s
The sum of the final momentum of the astronauts is given as follows;
[tex]P_{final}[/tex] = m₁·v₃ + m₂·v₃ = (m₁ + m₂) × v₃ = (100 kg + 100 kg) × 3 m/s = 600 kg·m/s
[tex]P_{final}[/tex] = 600 kg·m/s
∴ [tex]P_{initial}[/tex] = 500 kg·m/s ≠ [tex]P_{final}[/tex] = 600 kg·m/s
[tex]P_{initial}[/tex] < [tex]P_{final}[/tex], therefore, the sum of the linear momentum of both astronauts is not conserved
The sum of the initial kinetic energy of each astronaut is given as follows;
[tex]K.E._{initial}[/tex] = 1/2·m₁·v₁² + 1/2·m₂·v₂² = 1/2 × 100 kg × (5 m/s)² + 1/2 × 100 kg × (0 m/s)² = 1250 Joules
[tex]K.E._{initial}[/tex] = 1250 Joules
The sum of the final kinetic energy of the astronaut is given as follows;
[tex]K.E._{final}[/tex] = 1/2·m₁·v₃² + 1/2·m₂·v₃² = 1/2 × 100 kg × (3 m/s)² + 1/2 × 100 kg × (3 m/s)² = 900 joules
[tex]K.E._{final}[/tex] = 900 joules
[tex]K.E._{initial}[/tex] > [tex]K.E._{final}[/tex], therefore, the kinetic energy is not conserved
From which we get that neither momentum or kinetic energy is conserved.
A 62 kg male ice skater is facing a 42 kg female ice skater. They are at rest on the ice. They push off each other and move in opposite directions. The female skater moves backwards with a speed of 3.7 m/s. What is the velocity of the male skater?
The velocity of the male skater is 2.5 m/s in opposite to the direction of the female skater moving.
What is the law of conservation of momentum?According to the law of conservation of momentum, The overall momentum of two or more bodies acting on one another in an isolated system stays constant unless an external force is introduced. As a result, momentum cannot be gained or lost.
Given parameters:
The mass of the male ice skater is: M = 62 kg.
The mass of the female ice skater is: m = 42 kg.
Initially both of them are in rest.
After they push off each other and move in opposite directions, the female skater moves backwards with a speed of v =3.7 m/s.
Let the speed of the male ice skater is V m/s now.
From the law of conservation of momentum:
MV + mv = 0
V = - mv/M
= - (42×3.7)/62 m/s
= - 2.5 m/s
Hence, the velocity of the male skater is 2.5 m/s in opposite to the direction of the female skater moving.
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Hi, I have a question if I calculate the average force that must be exerted on a 0.145 kg baseball for me to give it an acceleration of 130 m/s2. How would I get I get the acceleration would I divide 130 by 0.145 kg to get the acceleration?
Select all of the ways collection areas use to gain water.
Question 1 options:
water evaporates from the collection area
runoff from precipitation
precipitation falls direction into the collection area
Answer:
runoff from precipitation
precipitation falls direction into the collection area
Explanation:
i took the test
A collection area gains water as runoff from precipitation or precipitation falling into the collection area.
A collection area is an area set aside for the purpose of collecting water. This water could come into the collection area as precipitation or as surface run off.
Hence, a collection area could gain water via;
runoff from precipitationprecipitation falling into the collection areaOut of the options in the questions, these are two ways in which collection areas can receive water.
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A 3000 kg truck travelling at 50km/hr strikes a stationary 1000 kg car, locking the two vehicles
together. What is the final velocity of the two vehicles?
(Please show work)
Answer:
50 x 3000 = 150000/4000 = 37.5
37.5 I think.
Explanation:
Hope this helps!
A 3000 kg truck travelling at 50km/hr strikes a stationary 1000 kg car, locking the two vehicles together, the final velocity of the two vehicles after the collision is approximately 10.43 m/s.
We may use the concept of conservation of momentum to calculate the final velocity of the two vehicles after the collision.
The total initial momentum (P_initial) is given by:
P_initial = (mass of truck) * (initial velocity of truck) + (mass of car) * (initial velocity of car)
P_initial = (3000) * (50) + (1000) * (0)
The velocity:
Vt = 50 * (1000/3600) = 13.9 m/s
Vc = 0 = 0 m/s
P_initial = (3000) * (13.9) + (1000) * (0 )
P_initial = 41700 kg·m/s
P_initial = P_final
41700 kg·m/s = (3000 kg + 1000 kg) * Vf
41700 kg·m/s = 4000 kg * Vf
Now Vf:
Vf = 41700 kg·m/s / 4000 kg
Vf ≈ 10.43 m/s
Therefore, the final velocity of the two vehicles after the collision is approximately 10.43 m/s.
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which force requires contact?
A. The force exerted by air as an object moves through it
B. The force produced by interactions between electronically charged objects
C. The forced produced by interactions between magnetic objects
D. The force of attraction between two masses
Answer:
A
Explanation: A is a example of Air resistance force, which is a contact force.
How do simple
machines magnify
forces?
Answer:
Motion at one end of the beam results in motion at the other end in the opposite direction.
Explanation:
The location of the fulcrum can magnify (or reduce) the force applied at one end at the expense (or advantage) of the distance over which the other end travels. Sorry if I get this wrong! I am in 5th grade. ♥
Oh no! The Hulk just fell off the Empire State Building! Calculate how long it took him to fall straight down from the top of the Empire State Building, which is 380 m high.
If you can provide some, explanation I will greatly appreciate it.
Answer:
8.803 s
(but this is only if it's a free fall, which we assume since we didn't get the mass of the hulk)
Because of the costs involved in maintaining high temperatures and pressure, nuclear method for generating electrical energy. is not yet a practical Which best completes the statement?
Answer:
Fusion or energy because I had that question in my school so I wrote it in my notes book so it fusion or energy I don’t now hop this help you
Explanation:
if you poured oil and water into a beaker , which liquid would be on top and which would be on the bottom ? How would the densities of the liquids compare with their positions in the beaker ? Explain
Answer:
oil floats in water due to the fact that it is less dense. since the water is more dense, it is basically heavier, and heavier items always sink, while lighter items float, the same can be said about liquids. denser liquids will sink while less dense items will float.
To calculate acceleration you must know both the objects velocity and_____
You need to know the time as well.
HELPPPPPP this due in 10 mins
Answer:
I dont really know but i think its water type of energy
Explanation:
Hope it helps
An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.
Please select the best answer from the choices provided
T
F
Answer:
An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.------- true
Answer:
T . Energy is transferred to the reactants
Explanation:
Determined by the Direction and Position of the electron's movement within its sublevel
A)Energy levels
B)Sublevels
C)Orbitals
D)Valances
C is correct just an FYI
Answer:
Huh?
Explanation:
Energy is...
a. motion
b. stored power as heat
c. power
d. the ability to do work or cause change?
Answer:
c
Explanation:
Answer:
it's d
Explanation:
because if you had energy you could do anything but without energy you won't be able to so anything
hope this helps
Please help!! This is due today!!
A shopping bag can provide a force of 65 N before breaking. A shopper puts 5 kg of groceries in the bag. If the shopper tries to lift the bag with an upward acceleration of 2 m/s/s, will the bag break?
Sloan is running with a momentum of 1850 kg m/s and has a mass of 58 kg. What is her velocity?
Answer:
v = 31.89 m/s
Explanation:
p = m × v
1,850 = 58 × v
58v = 1,850
v = 1,850/58
v = 31.89 m/s
A hiker climbs a hill 400 m high. If he weighs 50 kg
caleulate the work he does in lifting his body to the top of the hill
Answer:
20 is Solvent this is the answer u divide them
hii please help i’ll give brainliest if you give a correct answer please
Answer:
they are equal and act in opposite directions
Explanation:
newton's third law of motion states that if object A exerts a force on object B, then object B will exert an equal but opposite in direction force.
hope it helps, I think my response was late,
Can y’all help me pleaseeee
what is the formula for acceleration?
Answer:
Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.
Explanation:
9. If the frequency of a certain light is 3.8 x 1024 Hz, what is the energy of this light?
Answer:
E=hf
Were, h = Planck constant 6.67*10^11
E=3.8*10^24 * 6.67*10^11= 2.508*q0^36j
Balok diam diatas bidang miring pada sudut kemiringan 40° balok mulai bergerak,tentukan koefisien gesek statis antara balok dan bidang miring
Answer:
0.84
Explanation:
m = Massa balok
g = Percepatan gravitasi
[tex]\theta[/tex] = Sudut kemiringan
[tex]\mu[/tex] = Koefisien gesekan statik antara balok dan bidang miring
Gaya balok karena beratnya diberikan oleh
[tex]F=mg\sin\theta[/tex]
Gaya gesekan diberikan oleh
[tex]f=\mu mg\cos\theta[/tex]
Kondisi dimana balok mulai bergerak adalah ketika gaya balok akibat beratnya sama dengan gaya gesek pada balok.
[tex]mg\sin\theta=\mu mg\cos\theta\\\Rightarrow \mu=\dfrac{mg\sin\theta}{mg\cos\theta}\\\Rightarrow \mu=\tan\theta\\\Rightarrow \mu=\tan40^{\circ}\\\Rightarrow \mu=0.84[/tex]
Koefisien gesekan statik antara balok dan bidang miring adalah 0.84.
The weight of an object at sea level _____.
A. varies from place to place over the ocean
B. is constant at sea level elevation anywhere
Answer:
here again
Explanation:
here my answer
The half-life of carbon-14 is 5370 years. The carbon-14 levels in a fossil indicate that 6 half-lives have passed. How old is the fossil?
75,200 years
35,000 years
32,220 years
50,000 years
Answer:
32200
6*5370
Explanation:
What is the molar mass of Sodium Hydroxide, NaOH?
Answer:
40g/mol
Explanation:
The molar mass of a compound is the mass in grams of one mole of the substance.
To find the molar mass of NaOH;
a. Atomic mass of Na = 23g
O = 16g
H = 1g
b. So, the NaOH will have a molar mass of:
23g + 16g + 1g = 40g/mol
The molar mass of NaOH is 40g/mol
internal diameter of a test tube
Answer:
16 mm with 14 mm inside diameter.
The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.
A. The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.
B. The gravitational potential energy decreases and the kinetic energy increases.As soon as the ball starts moving it no longer has gravitational potential energy; it has only kinetic energy.
C. The kinetic energy and and gravitational potential energy both decrease. Both forms of energy are used up as the ball moves and are not transformed into any other form of energy.
D. The gravitational potential energy and the kinetic energy both stay the same. One form of energy cannot be transformed into a different form of energy.
Answer:
The gravitational potential energy decreases and the kinetic energy increases. The gravitational potential energy is transformed into kinetic energy as the ball rolls down the ramp.
Explanation:
The gravitational potential energy is the energy due to the position of a body above the ground.
Kinetic energy is the energy due to the motion of a body.
From the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".
As the ball rolls down the ramp, the potential energy at the height is converted to kinetic energy.
Calculate the change in gravitational potential energy
when a 1.5Kg box falls from a 2m shelf. Take
g=10N/Kg.
Answer:
30J
Explanation:
Given parameters:
Mass of box = 1.5kg
Height = 2m
Acceleration due to gravity = 10N/kg
Unknown:
Change in gravitational potential energy = ?
Solution:
The change in gravitational potential energy is given as:
ΔGPE = mgh
m is the mass
g is the acceleration due to gravity
h is the height
ΔGPE = 1.5 x 10 x 2 = 30J