Answer:
B IS CORRECT
Explanation:
Barnard's star distance from earth in light years
Answer:
5.978 años luz
Explanation:
Hi! Your answer is: The distance between the Barnard's star and Earth is 5.978 light years.
HELP ME PLEASE????????????????????????????????
A car of mass 800kg travels a distance of 40m at constant speed in a duration of 2.0s. The car exerts a forward force of 15kN.
What is the power generated by the car?
W = F × s
W = 15kN × 40 m
W = 15.000 N × 40 m
W = 600.000 J
P = W/t
P = 600.000 J/2 s
P = 300.000 Watt
P = 300kWatt
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How many protons are in the nucleus of an aluminum atom?
Explanation:
13 protons are in the nucleus of an aluminum atom
1. Define weight
2. How is the weight of an object related to its mass?
3. If an object has a mass of 50 kg, what is its weight?
4. An object is accelerating when it a speeds up b. slows down c changes direction d any of the above
5. Newton's second law of motion relates an object's acceleration to aits mass b. ils velocity c. the net force acting on it d. a and
6. Doubling the net force acting on an object a doubles its acceleration C. cuts its acceleration in half. b. decreases it acceleration d does not affect its acceleration
7. If the mass of an object doubles, its weight a. doubles b. decreases. c. is not affected. d changes by a factor of
8.If you know the mass of an object, you can calculate its weight with the formula a F-m XV b. a = Fim c. F = m X 9.8 m/s22 d. d = v X 9. Which units can be used to express force? a. N b. kg/s2 c. kgm/s2 d. a ando
10. If you push a 20-kilogram mass with a force of 40 N, what will be the object's acceleration? a 40 m/s2 b. 20 m/s2 c. 10 m/s2 d 2 m/s2
1. Weight is the gravitational pull with which the earth attracts the body towards the center of the earth. The S.I unit is Newton (N)
2. The weight of an object is related to its mass with the below equation.
W = mg
Where W = weight, m = mass and g = acceleration due to gravity
3. The mass m = 50 kg and g = 9.8 m/[tex]s^{2}[/tex]
Substitute the parameters in the equation above.
W = 50 x 9.8
W = 490 N
4. An object is accelerating when it speeds up. If the object slows down, it means it is decelerating. The correct answer is option A
5. Newton's second law of motion is:
F = ma
Where F = force applied, m = mass and a = acceleration
Therefore, Newton's second law of motion relates an object's acceleration to its net force acting on it. The correct answer is option C
6. According to Newton's second law of motion which relates an object's acceleration to its mass, doubling the net force acting on an object a doubles its acceleration. Because mass is always constant.
7. Since the weight of an object is related to its mass with the equation.
W = mg, If the mass of an object doubles, its weight will also doubles. Option A is the correct answer.
8. If you know the mass of an object, you can calculate its weight with the formula F = mX when X = 9.8m/[tex]s^{2}[/tex]
9. Force is expressed in unit as Newton (N)
10. The parameters given are :
mass m = 20kg
Force F = 40N
To calculate acceleration, use the formula F = ma
Substitute all the parameters into the equation.
40 = 20a
a = 40/20
a = 2m/[tex]s^{2}[/tex]
The correct option is D
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When a roller coaster gets to the bottom of a descent, describe the energy transfers and changes to energy stores that happen if:
a) the brakes are applied to stop it
b) it goes up and over a second hill.
Answer:
its B
Explanation:
It's B & A at the same time because A. a roller coaster uses brakes to slow down and stop. B is the most reasonable answer. Because all roller coasters go up and over a second time over the hill, but they also slow down. But go with B.
TELL ME IF I´M RITE
Sara walks, 3m North, from Point A to Point B. Which is True?
A. Distance and displacement are EQUAL
B. Distance is less than displacement
if two particles have equal momenta, are their kinetic energies equal?
A whale comes to the surface to breathe and then dives at an angle of 20.0 ∘ below the horizontal (see the figure (Figure 1)). If the whale continues in a straight line for 160 m , how deep is it? How far has it traveled horizontally?
Answer:
The question is missing something it doesn't say how fast down its going and doesn't show the figure sorry for wasting an answer
A bicycle traveled 150 meters west from point A to point B. Then it took the same route and came back to point A. It took a total of 2 minutes for the bicycle to return to point A. Wgat is the average speed and average velocity of the bicycle?
Answer:
469
Explanation:
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love u
What is dark matter Pls explain!
Answer:
Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe. ... Most dark matter is thought to be non-baryonic in nature; it may be composed of some as-yet undiscovered subatomic particles.
a person walks 4m[w] then 4m[S] then 4m[E] and finally 4m[N]. What is the persons displacement? what is the distance travelled?
None
because 9 + 5 = 10 why? because 4 of the ones in nine are liars pretending to be apart of the number so in reality there is only 5 and 5+5=10
I NEED THE RIGHT ANSWER ASAP THIS IS A SCIENCE QUESTION
Answer:
The answer is B.
Explanation:
A Block has a density of 0.97 g/cm 3. That is why 97 percent of the ice will sink in below the water.
Describe how kinetic energy is needed to increase the system's potential energy.
Answer:
kinetic energy is needed for potential energy since without kinetic energy potential energy would not have the potential energy to do anything
sorry if it doesn't make sense
Explanation:
youre holding a ball in the sky that is potential energy since it has the potential to fall. the kinetic energy is when it falls and lastly the potential is when it hits the floor..
How do I find force?
Answer:
The force formula is defined by Newton's second law of motion: Force exerted by an object equals mass times acceleration of that object: F = m×a( force = mass×area)
Hello, are there any furries, artists, equestrians, gamers, athletes, etc? If so reply down below
Say “OwO”if your a furry
Say “bonjour” if your an artist
Say “:-}”or yee haw if your an equestrian
Say “GG!” if your a gamer
Say “Just believe in yourself. Even if you don’t pretend that you do and, and some point, you will.” if your an athlete ⚽️⚾️⛳️⛸
Answer:
bonjour,GG, Just believe in yourself
Explanation:
Answer:
OwO (Also "bonjour" and "GG!" but saying those feels uncomfortably forced qwp)
Another name for the arrows in a free-body diagram is calling it a
Answer:
the free body diagram models the forces acting on an object. The object or 'body' is usually shown as a box or a dot. The forces are shown as thin arrows pointing away from the centre of the box or dot. ... It is important to label each arrow to show the magnitude of the force it represents.
What is the magic triangle used for in science? 10 points
Speed, distance and time can be calculated using a magic triangle. D (the distance) goes in the top of the triangle, S (speed) goes in the bottom left of the triangle and T (time) goes in the bottom right of the triangle.
PI=100 kPa
VI=5 L
P2= 200 kPa
V2=?L
Answer:
Explanation:
100.5=200.V2
V2 = 2,5L
Please solve this in 5 sentences or less. Best answer gets 30 points and brainliest!
The combination of a particle's mass and velocity produces momentum. Momentum is a vector quantity that has both magnitude and direction. The force exerted on a particle is equated to the time rate of change of momentum by Isaac Newton's second equation of motion.
What is Newton's Law of motion?First law of Newton : According to Newton's first law of motion, if a body is at rest or moving in a straight path at a constant speed, it will stay in that state or continue to move in that direction unless it is acted upon by an outside force.
Second law of Newton : According to Newton's second rule of motion, a body's rate of momentum change is inversely proportional to the force acting on it, and momentum changes occur in the direction of the net applied force.
Third law of Newton : Newton's third law of motion states that there is always an equal and opposite reaction to every action.
In order to accomplish work and to produce heat and light, energy must be transferred to a body or to a physical system. Energy is the quantitative attribute that does this.
A push or pull that an object experiences as a result of its interactions with its environment is known as a force.
Dust and smoke rising in the atmosphere as a result of an asteroid impact hinder sunlight from reaching our planet, resulting in a decrease in global temperature. Many living beings could die as a result of this incident. A small city might be destroyed if an asteroid the size of an apartment strikes Earth. A 20-story building-sized asteroid might wipe out a small nation if it were to strike Earth.
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the attractive or repulsive force between objects is called
If the masses are not changed, but the distance of separation is tripled, what happens to the for
You want to calculate the net force acting on an ice skater who is speeding up while
skating. Which of these is a force you would not add in to calculate the net force?
upward vertical force from the ice that supports the skater
force that the skater exerts on the ground
force exerted on the skater by the ground in reaction to the force the skater
exerts on the ground
gravity
Answer:
force that skater exerts on the ground
Explanation:
A flare fired upward at 49 m/s will reach a height of
Answer:
122.5 meters
Explanation:
We have the third equation of motion:
[tex]\boxed{\mathsf{v^2=u^2+2aS}}[/tex]
v stands for the final velocityu, initial velocitya is the acceleration of the particle in motionS, the distance covered by the same particle.Here, the particle is a flare.
It's initial velocity is 49 m/ s and the final will be zero, that's 'cause the particle comes to a standstill upon reaching its maximum, in case of motion under gravity.
a will be the acceleration due to gravity = 9.8 m/ s²
So, here are the terms we've got for the third eqn. of motion:
v = 0 m/ su = 49m/ sa = - 9.8 m/ s (the force of gravity acts downwards, and that's the direction we say is negative)Now, the term we've got to find out is the height reached by the flare, i. e., S.
=> v² = u² + 2aS
=> (0)² = (49)² + 2×(-9.8)×S
=> 0 = 49×49 - 2×9.8×S
=> 2×9.8×S = 49×49
[tex]\implies \mathsf{S=\frac{49\times 49}{2\times9.8} }[/tex]
=> S = [tex]\frac{245}{2}[/tex]
=> S = 122.5 metersAnd, S is the maximum height the flare covers, so the answer is 122. 5 meters
B. Assuming the acceleration is still -9.81 m/s2, what is the instantaneous velocity of the
shuttlecock when it hits the ground? Show your work below.
We have that the instantaneous velocity of the shuttlecock when it hits the ground is
[tex]V_{int}=\sqrt{U^2+19.6H}[/tex]
From the question we are told
Assuming the acceleration is still -9.81 m/s2, what is the instantaneous velocity of the
shuttlecock when it hits the ground? Show your work below.
Generally the equation for acceleration is mathematically given as
[tex]a=v \frac{dv}{dx}\\\\\Therefore\\\\\2ah=v^2-u^2[/tex]
Where
acceleration is still -9.81 m/s2,
Hence,
[tex]V^2-U^2=2(-9.81)*-H[/tex]
Therefore
[tex]V_{int}=\sqrt{U^2+19.6H}[/tex]
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I have the answer, but I don’t know how to get the answer. Can anyone explain how to get it?
In addition to time, which of the following must be used for a more complete description of the average acceleration of an object?
A. Mass
B. Displacement
C. Velocity
D. None of the above
How much energy does your soda lose if 25.0g of water condenses on the outside of the can?
The mass given is 25.0 grams. As for the change in temperature, I will assume that it start off at room temperature, 25°C.
Which describes a molecule? (Select all that apply.)
It can be one element by itself.
It can be the combination of different neutrons.
It can be two or more different elements combined.
It can be two or more of the same elements combined together. please help!
Answer:
a molecule is an electrically neutral group of two or
more atoms held together by chemical bonds
Explanation:
Answer:
It can be two or more of the same elements combined together.
It can be one element by itself.
Explanation:
How is air resistance similar to gravity? give me two ways.
Answer:
1. they both act on an object in free fall
Explanation:
2. both help determine how fast the object will accelerate