Answer:
Magnetic forces.
When the magnets are put together, the north pole is attracted to the south pole, which the south pole goes toward the opposing pole on the opposite magnet. Complicated, yes, but how magnets work.
I hope this helps!
what is regular body in physics
Answer:
The definition of a regular shape is that all the sides are equal and all the inside angles are equal. An irregular shape doesn't have equal sides or equal angles.
Explanation:
Hope this helps you
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How can people in australia be held on earth when they are ""upside down""?.
Answer:
Gravity
Explanation:
Because gravity is pulling you toward the center of the Earth.
a force of 4.40 N is applied to a dart over a distance of 0.54 m. The dart has a mass in of 0.028 kg. Assuming no energy is lost due to friction. what will be the speed of the dart after it’s thrown.
The kinetic energy refers to energy in motion. The moving dart possesses kinetic energy. From the calculations, the speed of the dart after it is thrown is 13 m/s.
What is energy?The term energy refers to the ability to do work. We must note that work done is throwing the dart is equal to the kinetic energy of the moving dart once it is thrown.
If work done = kinetic energy = Fx
Where;
F = force
x = distance
W = 4.40 N * 0.54 m = 2.376 J
Now;
KE = 1/2 mv^2
m = mass of the dart
v = velocity of the dart
v = √2KE/m
v = √2 * 2.376/ 0.028
v =13 m/s
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The Empire's space station is a long way from any star. It is circular and has a radius of 5. 10 km. The angular velocity that is needed to give the station an artificial gravity of 9. 80 ms2/ at its circumference is:___.
A) 4. 4 times 10^-2 rad/s.
B) 7. 0 times 10^-3 rad/s.
C) 0. 28 rad/s.
D) -0. 22 rad/s.
E) 1. 3 times 10^3 rad/s
Answer:
A
Explanation:
r= 5100m
acceleration of center=g= [tex]\frac{v^{2} }{r}[/tex]
v= rw, Which is angular velocity X radius
put this in acceleration of center equation
= [tex]\frac{(rw)^{2} }{r} =g[/tex]
= [tex]rw^{2} =g[/tex]
= [tex]5100 . w^{2} = 9.8[/tex]
[tex]w^{2} = 0.0019[/tex]
=[tex]\sqrt{0.0019} = 0.0438[/tex]
which is approximately A.
Which statement explains why a strip of sulfur is a better electrical insulator
than a strip of silicon?
A. Sulfur atoms have fewer protons than silicon atoms.
B. Sulfur atoms have more protons than silicon atoms.
C. Sulfur atoms allow more electrons to move between atoms than
silicon atoms do.
D. Sulfur atoms allow fewer electrons to move between atoms than
silicon atoms do.
Answer:
I think.d
(•‿•) bakalang tama
Answer:
d
Explanation:
because atoms fewer electrons to move between atoms than silicon atoms do
A diver dives off of a raft - what happens to the diver? The raft? How does this relate to Newton's Third Law?
Answer:
Every negative or positive thought and action we make must have an equal and opposite reaction.
Explanation:
pressure exerted by a liquid ______ with an increase in depth (increases/decreases)
Answer:
increases
Explanation:
as we know, that submarines need to be really really strong to go down in the ocean. That means that the more they go down in the water (liquid) then, they will face more pressure. That as we said, that the more down they go, the more pressure will be on them, which means that the pressure will keep on increasing as you go down and down in the ocean.
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A bird flies north 3 kilometers and then south 4 kilometers, what is the resultant displacement of the bird? Do not forget to include the direction
Answer: let north be+ and south be-
therefore, -1 km is the resultant displacement of the bird
hope it helped u,
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Answer:5 meters northeast
Explanation:
I just took the test.
blank is the of matter in an object.
Answer:
mass
Explanation:
Explanation:
mass is the answer.......
The bowling ball in the Figure below is whizzing down the bowling lane at 4.0 m/s. If the mass of the bowling ball is 7.0 kg, what is its kinetic energy?
The kinetic energy of the bowling ball is 56 J
What is kinetic energy?Kinetic energy is the energy possessed by an object is motion.
How to determine the kinetic energyFrom the question given above, the following data were obtained:
Velocity (v) = 4 m/sMass (m) = 7 KgKinetic energy (KE) =?KE = ½mv²
KE = ½ × 7 × 4²
KE = 3.5 × 16
KE = 56 J
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This table shows the weights of four different objects that are sitting on the floor. A person tries to lift each object with a force of 18 N, upward. Which
statement is supported by the data in the table?
Answer:
C. Objects 1 and 2 will not move, and objects 3 and 4 will accelerate upward
Explanation:
I took the test
if we shake the branches of tree the fruits fall why
Answer:
Explanation:
when a tree is shaken it's fruits and leaves fall down due to the gravitational force exerted by earth.
All fruits and leaves do not fall when tree is shaken, mostly only those fruits and leaves are fallen that are ripped.
It's because their tissues has become weak
Once the ball reaches the very top it's velocity is ?
A) zero
B) negative
C) accelerating
D) positive
ES 1. How fast must a truck travel to stay beneath an airplane that is moving 105 km/hr at an angle of 25 degrees to the ground?
Answer:
The truck must travel at a speed of 98.6677 km/hr to stay beneath the airplane
Explanation:
The given parameters are;
The velocity of the airplane, v = 105 km/hr
The direction of the airplane, θ = 25 degrees to the ground = 25°
Therefore, we have that the horizontal component of the velocity of the plane, vₓ is given as follows;
vₓ = v × cos(θ) = 105 km/hr × cos(25) ≈ 98.6677 km/hr
The vertical component of the velocity of the plane, [tex]v_y[/tex], is given as follows;
[tex]v_y[/tex] = v × sin(θ) = 105 km/hr × sin(25) ≈ 44.37 km/hr
The truck only has to travel at a speed equal to the horizontal velocity of the airplane to stay beneath the airplane
Therefore, the travelling speed the truck must be vₓ which is 98.6677 km/hr to stay beneath the airplane.
What is the acceleration of a 20N wooden box moving to the right with a force of 8N? It’s on a flat surface (wood)
Explanation:
if question specifies g=10ms^-2 then use that or else use g =9.81
Mass of wooden box= 20/9.81 = 2.0387359.... kg
F=ma
a=F/m
a=8/2.0387
a=3.92 ms^-2 (3 s f)
Help!!!!!!! Plsss!! Plsss!
Answer:
A
Explanation:
D is non-metal, gas, insulator
C is also non-metal, insulator
B is a metalloid, semiconductor, still have low melting point
A is a metal, solid, good conductor, have high melting point.
Answer:
This is Hard
Explanation:
I recommend asking a teacher for help
2. The speed of truck is 39 m/s. How long does it take for the truck to travel 9,000 m?
Answer:
[tex]\boxed {\tt 230.769231 \ seconds}[/tex]
Explanation:
Time can be found by dividing the distance by the speed.
[tex]t=\frac{d}{s}[/tex]
The distance is 9,000 meters and the speed is 39 meters per second.
[tex]d= 9,000 \ s\\s=39 \ m/s[/tex]
Substitute the values into the formula.
[tex]t=\frac{9,000 \ m}{39 \ m/s}[/tex]
Divide. Note that the meters, or "m" will cancel out.
[tex]t=\frac{9,000}{39 \ s}[/tex]
[tex]t=230.769231 \ s[/tex]
It takes 230.769231 seconds for the truck to travel 9,000 meters at 39 meters per second.
A projectile is launched horizontally at off a 20m high position. It goes 60m
horizontally. What was its launch speed?
A 22 g particle is moving to the left at 21 m/s . How much net work must be done on the particle to cause it to move to the right at 46 m/s
Answer:
18.425 Joules
Explanation:
To figure this out we can simply use the W=Change in Kinetic Energy,
W = 1/2*.022*46^2-1/2*.022*21^2 (Note we can ignore the direction of the particles as we need to take the square of the velocity)
W=18.425 (By simplifying the expression)
Which of the following is an example of Newton’s first law of motion?
Sam’s bike hits a curb and he flies over the handlebars, onto the grass.
A feather and a brick are dropped from a ladder. The brick exerts a greater force when it hits the ground.
A person sits on a chair and pushes down, and the chair pushes upwards on the person.
Tires from a car push against the road, and the road pushes back.
Answer:
I think first one
Explanation:
Because his first law of motion was every object will remain at rest or uniform motion in a straight line
Answer:
Sam's bike hits a curb and he flies over the handlebars, onto the grass.
Explanation:
As we know that: Newtons first law of motion states that a body continues to remain in the inertia of rest or motion, unless it is forced to change by applying an unbalanced force. Sam's bike is in uniform motion when suddenly the curb(external force) hits it and makes Sam to fall.
ASAP
An object was placed in 75 ml of water. When the object was then measured in the water, the new volume of the water with the object was 86 ml. What is the volume of the object?
Note: You only have to fill in the numerical answer.(no units)
Answer:
The answer is 11 mLExplanation:
To find the volume of the object we use the formula
volume of object = final volume of water - initial volume of water
From the question
final volume of water = 86 mL
initial volume of water = 75 mL
So we have
volume of object = 86 - 75
We have the final answer as
11 mLHope this helps you
n his Book of Questions, Gregory Stock asks, "If you could spend one year in perfect happiness but afterward would remember nothing of the experience, would you [spend a year that way]?" How would you answer Stock's question? Address either the psychological or philosophical issues raised by your response.
Answer:
1111111
Explanation:
Answer:
564356
Explanation:
Select the correct answer.
In which of these examples does chemical energy change to electrical energy
A. digesting food
B. photosynthesis
C. respiration
D. using a battery
Recet
Answer:
I think it would be using a battery recet
Explanation:
Answer: Using a battery
Explanation:
C
The unit of force, newton is a derived unit.
derived unit
Answer:
Because
Explanation:
5he force is not fundamental physical unit
How is mass and weight alike?
Acceleration is the change in the speed or direction of an object over time—in other words,acceleration is a change in an object's velocity over time. To determine the rate of acceleration, you usethe formula below. The unit for acceleration is meters per second per second ( m/s2). A positive value oracceleration shows speeding up, and negative value for acceleration shows slowing down. Slowingdown is also called deceleration
Explanation:
The acceleration of an object is equal to the rate of change of velocity. Its mathematical form is given by :
[tex]a=\dfrac{v-u}{t}[/tex]
Where
v is final velocity, u is initial velocity and t is time taken
The SI unit of velocity is m/s and that of time is s. The SI unit of acceleration is [tex]\dfrac{m/s}{s}=m/s^2[/tex]
If final velocity is more than the initial velocity, acceleration is positive.
If the final velocity is less than the initial velocity, the acceleration is negative. It is also known as deceleration.
Hence, all the statement is true.
If the object's initial velocity is 0 m/s , what is the velocity of an object at t = 8.0s
Answer:
0_8.0
8.0m/s
Explanation:
8.0m/s is the velocity of an object .
A person throws a pumpkin at a horizontal speed of 4.0\,\dfrac{\text m}{\text s}4.0 s m 4, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction off a cliff. The pumpkin travels 9.5\,\text m9.5m9, point, 5, start text, m, end text horizontally before it hits the ground. We can ignore air resistance.
Answer:
d = 27.522 m
Explanation:
The horizontal speed of a pumpkin, [tex]v_x=4\ m/s[/tex]
The horizontal distance covered by the pumpkin, [tex]d_x=9.5\ m[/tex]
We can assume to find the the pumpkin's vertical displacement during the throw.
Firstly we can find the time of flight for the pumpkin. It can be calculated as follows :
[tex]t=\dfrac{d_x}{v_x}\\\\t=\dfrac{9.5}{4}\\\\t=2.37\ s[/tex]
The vertical displacement during the throw is given by :
[tex]y=u_yt+\dfrac{1}{2}a_yt^2[/tex]
Here, [tex]u_y=0\ \text{and}\ a_y=-g[/tex]
So,
[tex]y=\dfrac{1}{2}gt^2\\\\y=\dfrac{1}{2}\times 9.8\times (2.37)^2\\\\y=27.522\ m[/tex]
So, the vertical displacement of the pumpkin is 27.522 m.
Answer:
-27.6
Explanation:
Khan Academy, bleh
Calculate the weight of your 2kg physics book on earth
A.15 N
B.19.6 N
C.9.8 N
D.4.9 N
What net force would be needed to accelerate a 2.95kg bowling ball at 6.25m/s^2?
The net force would be needed to accelerate a 2.95kg bowling ball at 6.25m/s^2 will be F = 18.4375 N
What is Newton's second law of motion ?Newton's second law of motion states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.
For a constant mass , force is equal to Force = mass * acceleration
given
mass(M) = 2.95 kg
acceleration(a) = 6.25 m/s^2
Force(F) = ?
Force(F) = mass(M) * acceleration(a) (from Newton's second law of motion )
F = 2.95 * 6.25
F = 18.4375 N
The net force would be needed to accelerate a 2.95kg bowling ball at 6.25m/s^2 will be F = 18.4375 N
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