Answer:
10-0÷2=5 that's the answer
If thermal energy is added to a liquid, what is the most likely thing that will happen to the substance?
Explanation:
When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation).
the 20 kg at angle of 53⁰ in an inclined plane is realsed from rest the coefficient of friction bn the block and the inclined plane are ųs=0.3 and ųk=0.2
A) would the block move
B) if it moves what is its speed after it has descended a distance of 5m down the plane
Given :-
A 20kg block at an angle 53⁰ in an inclined plane is released from rest .[tex]\mu_s = 0.3 \ \& \ \mu_k = 0.2[/tex]To Find :-
Would the block move ?If it moves what is its speed after it has descended a distance of 5m down the plane .Solution :-
For figure refer to attachment .
So the block will move if the angle of the inclined plane is greater than the angle of repose . We can find it as ,
[tex]\longrightarrow \theta_{repose}= tan^{-1}(\mu_s)[/tex]
Substitute ,
[tex] \longrightarrow \theta_{repose}= tan^{-1}( 0.2)[/tex]
Solve ,
[tex]\longrightarrow\underline{\underline{\theta_{repose}= 16.6^o }}[/tex]
Hence ,
[tex]\longrightarrow\theta_{plane}>\theta_{repose}[/tex]
Hence the block will slide down .
Now assuming that block is released from the reset , it's initial velocity will be 0m/s .
And the net force will be ,
[tex]\longrightarrow F_n = mgsin53^o - \mu_k N [/tex]
Substitute, N = mgcos53⁰ ( see attachment)
[tex] \longrightarrow ma_n = mgsin53^o - \mu_k mgcos53^o [/tex]
Take m as common,
[tex] \longrightarrow\cancel{m }(a_n) = \cancel{m}( gsin53^o - \mu gcos53^o)[/tex]
Simplify ,
[tex] \longrightarrow a_n = gsin53^o - \mu_k g cos53^o[/tex]
Substitute the values of sin , cos and g ,
[tex] \longrightarrow a_n = 10( 0.79 - 0.2 (0.6)) [/tex]
Simplify ,
[tex] \longrightarrow a_n = 10 ( 0.79 - 0.12 ) \\\\ \longrightarrow a_n = 10 (0.67)\\\\ \longrightarrow \underline{\underline{a_n = 6.7 m/s^2}}[/tex]
Now using the Third equation of motion namely,
[tex] \longrightarrow2as = v^2-u^2[/tex]
Substituting the respective values,
[tex] \longrightarrow2(6.7)(5) = v^2-(0)^2 [/tex]
Simplify and solve for v ,
[tex] \longrightarrow v^2 = 67 m/s\\\\\longrightarrow v =\sqrt{67} m/s \\\\\longrightarrow\underline{\underline{ v = 8.18 m/s }} [/tex]
Hence the velocity after covering 5m is 8.18 m/s .
The conductor is initially electrically neutral, and then a charge +q is placed at the center of the hollow space. Suppose the conductor initially has a net charge of +9q instead of being neutral. What is the total charge on the interior and on the exterior surface when the +q charge is placed at the center? Please explain the answer as well..
Hi there!
If a +q charge is placed in the center of a hollow conductor, a charge of -q will be induced in the interior of the shell.
Thus, with the conservation of charge:
[tex]q_{outer} + q_{inner} = q_{total}\\\\q_{outer} - q = 9q[/tex]
Solve for the outer charge:
[tex]q_{outer} = q + 9q = 10q[/tex]
Therefore, the INTERIOR has charge -q and EXTERIOR has charge 10q.
•If the car and truck collided, which
direction would the two cars move. Be
sure to explain your answer in terms of
momentum.
Answer:
The cars would both move in the direction with the greatest momentum. We know the truck would have the greatest momentum due to having the greatest mass. Plus, factors which affects momentum are mass and velocity.
Thus, the car would move forward towards the direction of momentum of the truck. Both will continue to move at the same velocity.
E.g. truck hits the back of a stationary car, both will move forward, to the right & travelling at the same speed, but lower than the initial velocity of the truck. Now the total the total momentum before the collision is the same as the total momentum after the collision; as a result, momentum has been conserved.
Hope this helps!
What type of main sequence star is most likely to become a black hole?.
The mass of a large car is 1000 kg. How much force would be required to accelerate the car at a rate of 3msec2
Answer:
3000 N
Explanation:
We have,
• Mass, m = 1000 kg
• Acceleration, a = 3 m/s²
We have to find force required, F.
[tex]\longrightarrow[/tex] F = ma
[tex]\longrightarrow[/tex] F = 1000 × 3 N
[tex]\longrightarrow[/tex] F = 3000 N (Answer)
A learner has a mixture of sand and water. The best method to separate this solution would be ?
Answer:
An filtration is the answer.
brainlist nd 20 points
Answer:
I'm not sure but I think it's 35-39
What type of mass movement moves the most material, averaged over the earth’s land and over long times?.
Answer:
the many, small events move the most material.
Explanation:
When an object has a electrical charge, electrons are? _____ when it comes in contact with other objects
Globally, the winter of 2014–15 was the warmest winter on record at that time, but it sure didn’t seem that way for most of the eastern United States. This region experienced record-low temperatures and extreme snowfall, especially in the northern and coastal areas. During this period of extreme cold and snow, it was not uncommon to see comments on social media disputing climate change. For example, some commenters took pictures of huge piles of snow and added comments such as, "This doesn’t look like global warming."
Do these commenters have a point? Should extreme snowfall over the course of a season cast doubt on the theory of global climate change? Make a scientific argument explaining why you agree or disagree with these commenters.
Answer:
I need help on this to omg
Explanation:
2. Two spherical objects have masses of 1.5 x 109 kg and 8.5 x 10 kg. Their centers are
separated by a distance of 2500 m. Find the gravitational attraction between them.
music=life=love=GOD
GOD is MUSIC
Explanation:I hope this helps. Not with your mathematical issue. Maybe watch Good Will Hunting?
LOL
God Bless brother. I hope you get it. It takes hard work.
b.
if velocity is in m/s and time is in sec, what is the unit of acceleration?
Determine the electric potential energy for the array of three charges in the drawing, relative to its value when the charges are infinitely far away and infinitely far apart.
Although we do not have the diagram needed to answer this question, we can provide general information in that electrical potential energy is calculated based on the charges and the distance between them.
How do we calculate electric potential energy?This energy can be calculated using the value of the charges along with the distance between them with the formula Energy = [tex]k\frac{q1q2}{r}[/tex] in which q represents the charges whilst r represents the distance of separation. As we can see these values are inversely proportional to one another.
Therefore, we can confirm that we can calculate electric potential energy using the charges and the distance between them, which will be inversely proportional to one another.
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In a diving team, you are the team leader and you have three orientation in a trip 1-the red sea (low density) , 2-Dead sea (high density), 3-Deep lake (Pure water),which place is the best to dive in with your team.explain your opinion.
Answer:
I choose red sea, because while diving, it will be more easier if the upward force is less(upthrust). since the upthrust increase with increase with density, it will be much difficult to dive in Dead sea than red sea.
1. since red sea has less density, it would have the minimum upthrust, which results in less resistance while diving.
it is also because, the pressure inside the liquid at same depth will be less in red sea, due to its density.
PLEASE MARK BRAINLIEST.
how does lightening occur
Can you please tell me me by looking this book picture
Please fast
Answer:
lightening happens because light is reflectting the inner space of the imagination of dragons
Answer:
When the negative charge in the bottom of cloud are attracted to the positive charge in the ground.Like this lightening occurs.
Salem walked 60 m in 5 seconds, his average speed is.
Answer:
12m/s
Explanation:
60/5=12
Answer:
Explanation:
Solution,
Distance(d)=60m
Time(t)=5sec
Now,
A.speed=d/t
A.speed=60/5=12m/s
What is the relationship between the shock wave of an explosion and sound?
A gravitational force of 2.54 x 10^-10 is exerted by two objects that are 0.25 m apart. If the first object has a mass of 0.35 kg, what is the mass of the second object?
Answer :
what is the answer options?
Explanation:
Think of an example from real life that can be explained with Newton's Third Law.
Answer:
when you jump, your legs apply force on the ground that applies an equal and opposite reaction that make you jump
Do loud sounds travel faster than soft sounds?
Answer: No. Both travel at the same speed.
Explanation:
Answer: no, they all travel at the same speed
Explanation: the amplitude of a sound does not matter for all sound travels at the same speed
if you are riding on a train that speed past another train moving in a same direction on an adjacent track ti appears that the other train is moving backward why?
Answer:
If you are traveling with a relativity constant velocity, then you will interpret your reference frame as being at rest. Since you are moving faster than the other train, the other train is moving backwards relative to you. Seeing the other train go past your window from front to rear makes it look like the train is going backwards
Explanation:
What is your Momentum traveling 4 m/s with a mass of 70 kg?
Answer:
280
Explanation:
I used the equation for momentum, p=mv
70 x 4 = 280
An object experiences a certain net force that causes a certain acceleration. If the net force on the object is
tripled, what happens to the acceleration of the object?
Answer:
it increases
Explanation:
equal to opposite force so it would return the amount applied on it
If an object experiences a certain net force that causes a certain acceleration. If the net force on the object is tripled , then the acceleration of the object would become tripled as well assuming the mass of the object is constant.
What is Newton's second law ?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
As given in the problem if an object experiences a certain net force that causes a certain acceleration. If the net force on the object is
tripled,
If a specific net force acting on an item results in a specific acceleration. Assuming the mass of the item remains constant if the net force acting on it is tripled, the acceleration of the object would also be tripled.
Thus, the acceleration of the object would get tripled.
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Davina accelerates a box across a smooth frictionless horizontal surface over a displacement of 18. 0 m with a constant 25. 0 n force angled at 23. 0° below the horizontal. How much work does she do on the box?.
work and force
w = f cos 23 . d
w = 25 cos 23° . 18
w = 414.23 J
What is the difference between kinematics and dynamics?.
A periodic wave has a wavelength of 2m and has a speed of 45 m/s what is the frequency
Answer:
f = 22.5 Hz
Explanation:
speed of wave = v
frequency = f
wave length = l
v = lf → f = v/l → f = 45/2 → f = 22.5 Hz
what is the relationship between wavelength and frequency ?
Answer: inverse relationship
Explanation: one increases and the other decreases
If the sum of all the forces acting on a car is zero, then the speed of the car?
Answer: If all forces acting on a car are zero, than the cars speed is zero since there are no forces to push or pull the car :)
Explanation:
Which wire has the most total charge carriers flowing past a point in the wire during the specified time interval
The wire 2 has the most charge flowing in it at the given time interval.
Charge flowing in each wireThe total charge flowing in each wire is calculated using the following equation;
Q = It
where;
I is the currentt is the time of current flowCharge in wire 1The charge flowing in wire 1 is calculated as follows;
Q = 1 x 60 = 60 C
Charge in wire 2The charge flowing in wire 2 is calculated as follows;
Q = 2 x 45 = 90 C
Charge in wire 3The charge flowing in wire 3 is calculated as follows;
Q = 3 x 10 = 30 C
Thus, the wire 2 has the most charge flowing in it at the given time interval.
The complete question is below
The current across three identical current carrying wires is measured during a certain time interval. The reading is reported in the table
Current (A) Time Interval (S)
Wire 1 1 60
Wire 2 2 45
Wire 3 3 10
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