Answer:
When two surfaces slide against each other, a force called friction makes them stick very slightly together. Smooth surfaces, like ice and glass, are easy to slide over
Explanation:
They create very little friction. Rough surfaces like rock and sand create much more friction, and are easy to grip on to.
Hello There!
Smooth Surfaces are easier to slide over. That's true.
Take an object and slide it across a rough surface. Now, slide the same object across a smooth surface.
What do you see?
I expect you wil find out that smooth surfaces are easier to slide over.
Reason:
Smooth surfaces have less friction than rough ones.
Hope it helps!
Jason throws a ball horizontally off a 300 meter cliff at 15.0 m/s. How far will it travel before it hits the
ground? Use significant figures, and estimate g to be equal to 9.81 m/s2. Round the answer to the nearest
hundredth.
117.30 m
B
130.80 m
с
51.80 m
D
101.70 m
Answer:
117,30m
Explanation:
I think the situation here is a horizontal projection to the ground. So in order to find the distance the formula = Ut, where U is the initial speed and t is the Time of flight. To get the time of flight in this case =√2h/g where h is the height and g is gravity. so to get the time = √2×300÷9.81 =7.821 .so range =ut which is equal to the time multiplied by 15m/s =117.30m
Hi there!
To find the total distance traveled, we must find the time taken to fall down.
Ignore the horizontal velocity when dealing with the vertical direction. We can use the simplified equation:
[tex]t = \sqrt{\frac{2h}{g}{}}[/tex]
Plug in the given values:
[tex]t = \sqrt{\frac{2(300)}{9.81}} = 7.821 sec[/tex]
Use the equation:
Δd = vt
Plug in the time and horizontal velocity:
Δd = (15)(7.821) = 117.30m
There is said to be a short circuit when
A. one part of a closed circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.
B. one part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.
C. one part of a parallel circuit has a very low resistance and very little of the current will flow through this part and almost all the current will flow through the other part.
D. one part of a closed circuit has a very low resistance and very little of the current will flow through this part and almost all the current will flow through the other part.
A short circuit is said to have occurred when two nodes of a circuit at different voltages are abnormally connected
There is said to be a short circuit when; One part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part
The correct option is option B.
Reason:
A circuit has to be closed or the the current path has to be closed for
current to flow. A short circuit occurs when current in a circuit flows
through an abnormal path, such as a bridge in a connection to a load that
creates a parallel path for current flow.
Almost all the current flows through the parallel path due to the low
resistance in the connection (almost zero) and the proximity to the power
source, thereby preventing current from reaching its intended destination
Therefore, the correct option is option B.;
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5) Match the following.
Answer:
hope helpful
Explanation:
mark me as brainliest pls
2.A girl of mass 50kg climbs a flight of a stair having 40steps each of 30m high in 10 s. Calculate the power developed by the girl.
Answer:
[tex]{ \boxed{ \pmb{power = \frac{force \times distance}{time} }}} \\ [/tex]
force → (50 × 10) = 500 Ndistance → (30 × 40) = 1200 mtime → 10 seconds[tex]{ \rm{power = \frac{500 \times 1200}{10} }} \\ \\ { \rm{power = \frac{600000}{10} }} \\ \\{ \underline{ \underline{ \rm{ \dashrightarrow \: \: power = 60,000 \: newtons \: \: }}}}[/tex]
2 H2O2-> 2H20+02
2. What are the reactants in this reaction?
3. What are the products in this reaction?
4. What happened in this particular reaction? What happens in general decomposition reaction?
Answer:
This reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen. Add 2 molecules of hydrogen peroxide and 2 molecules of water. Since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.
3]Explanation: This reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen. Add 2 molecules of hydrogen peroxide and 2 molecules of water. Since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.
4]Two moles of hydrogen peroxide H2O2 decomposes to produce two moles of water H2O and one mole of oxygen gas O2(g) , which then bubbles off
Tính lực tương tác giữa 2 điện tích q1=4.10^-6C và q2=-3.10^-6C cách nhau một 3cm đặt trong dầu hoả = 2
Explanation:
decimal diamond ml dias and ka n t u t a n mo papa mo
138.42 g of salt water has a volume of 117.0 mL. Determine its density.
please answer the question
Answer:
A safest device
Explanation:
it's meant to operate safe and provide over current protection of an electrical circuit
A 50 N force is acting on a soccer ball that is 5 kg, what's the acceleration of the soccer ball?
Answer:
Explanation:
HCE 20 ADIASM EPEGURNTE MSIMOLO
A car accelerates from 0 to 30 m/s in 8 seconds. What is its acceleration?
Answer:
3.75m/s²
Explanation:
a=v-u. then you substitute the values
t
5. Calculate the acceleration of a 2 kg block across a table if you push with a force of 20 N and the frictional force is 4 N.
Please show work so I can understand!
Answer:
Explanation:hey do you go to GOC too?
Срочно нужно решение задания 5, пожалуйста!!!!!
Please help me with part 2. Will give brainliest
Hi there!
We can use the derived equation to solve:
[tex]t = \sqrt{\frac{2h}{g}}}[/tex], where:
h = height
g = acceleration due to gravity
Plug in the given values. Remember to CONVERT km to m:
32 km = 32 km * 1000 m / 1 km = 32,000 m
t = √(2(32000)/3.4) ≈ 137.199 sec
Part 2:
Use the derived equation:
vf = √2gh
vf = √(32000)(3.4) = 329.848 m/s
A bar magnet is separated four times, the number of monopoles and dipoles formed are __.
[the answer is 0 monopoles and 4 dipoles, but I think it should be 8 dipoles.]
Kindly Help me understand !
The characteristics of the magnetism allow to find the results for the questions related to the division of the magnetic bar are:
The magnetic monopoles do not exist. When cutting the magnet there are 4 magnetic dipoles.
The magnetic field is understood today as the effect of the movement of electric charges, in this sense there is no magnetic monopole since the orbital or spin movement of the charges is continuous.
The dipole or magnetic moment is caused by the movement of the electrons around the nucleus, in some cases the movements are in the opposite direction and can be annulled and the electrons grinding on themselves called spin.
A magnet is a material where there is a permanent magnetic field formed by the sum of all the microscopic contributions, this sum gives a dipole or total magnetic moment different from zero.
They indicate that a bar-shaped magnet is cut into four parts, each part forms a smaller magnet, that is, each part is a magnetic dipole.
In conclusion, using the characteristics of magnetism we can find the results for the questions about the division of the magnetic bar are:
The magnetic monopoles do not exist. When cutting the magnet there are 4 magnetic dipoles.
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Which one of these is NOT a rate:
A. 30 miles per gallon (of gasoline)
B. 5 seconds
C. 5 meters per second
D. 5 apples for $1
Answer:
The answer is B. 5 seconds.
an object is thrown with an initial speed v near the surface of earth. assume that air resistance is negligible and the gravitational field is constant. if the object is thrown vertically upward, the direction and magnitude of its acceleration while it is in the air is
Hi there!
a = -9.81 m/s²
When throwing a ball into the air (ignoring air resistance), the acceleration in the vertical direction is ALWAYS constant and equal to the acceleration due to gravity.
In this instance, the acceleration due to gravity is downward, resulting in the object falling. So, we must put a negative sign:
Thus, a = -9.81 m/s².
A cart was pushed in a ramp exerting 23N upward creating an angle of 53° N of W. How much force is exerted vertically and horizontally?
Explanation:
theta = 90-53(we are getting horizontal angle)
=37
force(F)=23N
vertically =Fsin(theta)=23sin(37)=13.84N
horizontally=Fcos(theta)= 23cos(37)=18.37N
If a cart was pushed in a ramp exerting 23 Newtons upward creating an angle of 53° north of the west, then the horizontal component of the force would be 13.84 Newtons, and the vertical component of the force would be 18.36 Newtons.
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 a cart was pushed in a ramp exerting 23 Newtons upward creating an angle of 53° north of the west,
The horizontal component of the force = 23 × cos 53° Newtons
=13.84 Newtons
The vertical component of the force = 23 × cos 53° Newtons
=18.36 Newtons
Thus, the horizontal component of the force would be 13.84 Newtons, and the vertical component of the force would be 18.36 Newtons.
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018 10.0 points
Salmon often jump waterfalls to reach their
breeding grounds.
Starting downstream, 1.83 m away from a
waterfall 0.332 m in height, at what minimum
speed must a salmon jumping at an angle of
43.7° leave the water to continue upstream?
The acceleration due to gravity is 9.81 m/s?.
Answer in units of m/s.
r in units of
10
100
Answer:
jfjcgufnfhfufm TV fifnricnrhkddufnfif km fgkfkvntfmrugrhfifnh r
There’s 5.68 s until the end of a "Red Light, Green Light" game, when "Green Light" is called. You start atrest and accelerate at 4.1 m/s2and reach your maximum speed after 1.7 s. You run at your maximum speeduntil you reach the finish line.If the finish line is 32 m away, do you survive the first game? Show your work.
Answer:
SQUID game imagine
Explanation:
What is the total distance travelled? What is the displacement of the object?
Write at least on paragraph about space exploration and why it interests you.
Answer:
use Myassignmenthelp.com it's free
What force causes you to move upward when you jump into the air?
a. You push down on Earth with a force greater than your weight, so Earth pushes back on you with a force that is equal in magnitude but opposite in direction
b. You push down on Earth, and because Earth is so large, it pushes back on you with a force that is greater than the downward force you exerted on it
c.You push down on Earth, but because Earth is stationary, Earth cannot exert an upward force on you so internal forces from your muscles act on your body itself.
d.You push down on Earth, which causes it to move slightly down under your feet and give you the sensation that you have risen.
When the toaster is switched on the current is 4.0 A
The resistance of the toaster is 60 Ω
Calculate the power of the toaster.
Use the equation:
power = (current)^2 × resistance
Answer:
by using the formula it would be (4)^2 x 60 which gives 960 watt
What new characteristic did John Dalton add to the model of the atom?
An atom is a round, solid mass.
An atom has a massive, positive center.
An atom is made up of smaller particles.
An atom can join with other kinds of atoms.
Answer: It is matter
Explanation:
Answer:
D
Explanation:
Trust me, I just did the test. :) :) :)
If the mass were to increase 12 times, what would happen to the kinetic energy?
Answer:
Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest. Tell me if u need any more help, have a goooood dayyyyy and pls mark brainly
Explanation:
The average speed of a plane was 600 km/hr. How long did it take
the plane to travel 120 kilometers?
Answer:
0.2 hours
Explanation:
If an object has an increasing positive acceleration, what can we assume about the forces on it?
Answer:
F = M a is a vector equation
F has the same sign as A and is in the same direction as the vector a
If a is positive then F must also be positive
If an object has an increasing positive acceleration, then we can assume that there is some unbalanced increasing force acting on it as the force is the product of the mass of the object and the acceleration.
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.
The acceleration of an item rises proportionately to the force applied to it. So, doubling the force also doubles the acceleration.
Since the force is equal to the product of the item's mass and acceleration, if an object is moving at an increasing positive acceleration, we may infer that there is an imbalanced growing force acting on it.
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the loudness of a sound is determined by the __________, or height, of the sound wave.
Answer: Aplitude
Explanation: Loudness depends on the amplitude,or height, of sound waves. The greater the amplitude, the louder the sound perceived. Amplitude is measured in decibels.
Answer:
Amplitude
Explanation:
The loudness of a sound is determined by the amplitude of the wave. In terms of the pattern of a transverse wave, amplitude refers to how "high" and "low" the waves go from the center line.
PF
A woman in a sprint race accelerates from rest to 8.7 m/s in 2.7 s. What is her displacement?
Answer:
23.49m
Explanation:
Distance = velocity x time
8.7 x 2.7 = 23.49m
Which statement is a description of Charles’s law?
The temperature and volume of a gas are directly proportional when pressure is constant.
The temperature and volume of a gas are inversely proportional when pressure is constant.
The volume and pressure of a gas are directly proportional when temperature is constant.
The volume and pressure of a gas are inversely proportional when temperature is constant.
Answer:
The temperature and volume of a gas are directly proportional when pressure is constant