Answer:
0.061m
Explanation:
Given the following
image distance v = 0.080m
Object distance u = 0.25m
For concave mirror, the image distance is positive
Using the mirror formula;
1/f = 1/u + 1/v
1/f = 1/0.25 + 1/0.080
1/f = 4 + 12.5
1/f = 16.5
f = 1/16.5
f = 0.061m
Hence the focal length of the mirror is 0.061m
I need help haha, I need to get 5 brainiest to move on to the next stage, anyone help me plz! I've tried answering normal questions and no one gives it to me so ugh help.
Answer:
ohk but u also thank me and mark as brainliest
A room is 5.0 m long, 4.0 m wide, and 3.0 m high. What is the mass of the air it contains?
Answer:
Here u go
Explanation:
Mass of air in the room m= volume of room×density of air
=(5m×4m×3m)(1.20kgm3)=72kg
Weight of air, W=mg=(72kg)(9.8ms2)=706N.
Answer:
person above is correct, i did the work and got the smae answer
please help me i need help right away!!!!
Answer:
Direct current is the flow of current through a current carrying conductor in the same direction from positive to negative ends. Alternating current is the type of current our mains have where the current is constantly changing direction at a certain rate
Explanation:
Direct current (DC) is a form of electricity that has a unidirectional flow, such that the current path in the current carrying conductor of a circuit is, at all times, in a specific single direction
Alternating Current (AC) is electricity continuously reverses its direction of flow and the magnitude of electricity at a given frequency with time. It is the of current found in electric supply cables that are found in our houses
Therefore, we have;
Direct current is the flow of current through a 1. current carrying conductor in the 2. same direction from positive to negative ends. Alternating current is the type of current our 3. mains have where the current is constantly 4. changing direction at a certain rate
Which statement accurately describes renewable energy sources?
A. They include fossil fuels and hydroelectric power.
B. They are found in nearly limitless supply.
C. They take millions of years to form and should be used responsibly.
D. They provide the majority of the energy for the United States.
PLS HELP!! I WILL GIVE BRAINLYIST!!
Answer:
A, They include fossil fuels and hydroelectric power.
Explanation:
Hope this helped!!!! :)) <3
A crowbar is used to lift a load of 1200 N by placing it at a distance of 25 cm from the fulcrum.
the force required at 60 cm from the fulcrum to balance the load.
Answer:
500 N
Explanation:
From the question,
Sum of clockwise moment = sum of anti clockwise moment.
F×d = F'×d'.................. Equation 1
Where F = Force applied to lift the load, d = distance, F' = Force required, d' = distance of the required force from the fulcrum
Make F' the subject of the equation
F' = F×d/d'.................. Equation 2
Given: F = 1200 N, d = 25 cm, d' = 60cm.
Substitute these values into equation 2
F' = 1200×25/60
F' = 500 N.
Hence the force required to balance the load is 500 N
fast need answers
Find the amount of force if the body has pressure of 178 Pa on 18 mm²
Answer:
Force = 3.204Newton
Explanation:
Given the following data;
Pressure = 178
Area = 18 mm² to meter = 18/1000 = 0.018 m²
To find the force;
Force = pressure * area
Force = 178 * 0.018
Force = 3.204 Newton.
I have a circuit with a 200 V battery which produces 150 W of power. What is the
current in the circuit?
Explanation:
0.75
According to the formula, P=IV
150 = I×200
10. WIMPS and MACHOS cannot be seen or felt.
True
False
Answer:
false I believe is the right answer
Answer:
True
Explanation:
The speed limit on an interstate highway is posted at 75mi/h. What is the speed in kilometers per hour? In feet per second?
Answer:
See explanation
Explanation:
The conversion factor from miles per hour to kilometers per hour is 1.609344.
Hence;
To convert 75mi/h to kilometers per hour,
75mi/h * 1.609344 = 120.7 kilometers per hour
b)
To convert 75mi/h to feet per second
Since
1 mile per hour = 1.46667 foot per second
75mi/h = 75 * 1.46667 = 110 feet per second
a ball rolls from rest down an incline with a uniform acceleration of 4m/s². what is it speed after 8 seconds
Anyone know the answer
An object with a velocity of
1 m s-l accelerates with an
acceleration of 1 m s2.
What is its velocity after
moving 1 m?
A 1.4 ms s-1
B 1.7 m s -1
C) 2.0 m s-
D 3.0 m s-1
-1
Answer:
v = 1.7 m/s
Explanation:
Given that,
Initial velocity of the object, u = 1 m/s
Acceleration of the object, a = 1 m/s²
We need to find the velocity of the object after moving 1 m. Let v be the velocity. Using third equation of kinematics to find it i.e.
[tex]v^2-u^2=2ad\\\\v^2=2ad+u^2\\\\v^2=2(1)(1)+1^2\\\\v=\sqrt3\\\\v=1.7\ m/s[/tex]
So, the final velocity of the object is 1.7 m/s.
Solar energy heats the surface of the Earth, including the ground, rocks, and even roadways. As the temperature of these surfaces increases, heat energy is released back into the atmosphere, forming a pocket of warm air. As the warm air pocket rises, it is replaced by cooler air. This process is responsible for many of the weather patterns in our atmosphere and is known as
Answer:
convection
Explanation:
I hope this helps
A 2-kg toy car accelerates from 0 to 5 m/s2. It
travels 2 m.
A 2-kg toy car originally moving at 5 m/s is
brought to rest. It travels 1 m.
A 2 kg toy car is held at a height of 3.75 m
above the floor.
A 2-kg toy car accelerates from 5 to 10 m/s2. It
travels 7 m.
A 2-kg toy car accelerates from 10 to 5 m/s?. It
travels 10 m.
Answer choices:
20 joules of work is done by the object
No work is done on or by the object
10 joules of work is done by the object
100 joules of work is done by the car
70 joules of work is done by the car
The work done by the toy car when it travels 2 m is 20 J.
The work done by the toy car when it travels 1 m is 10 J.
The work done by the toy car held 3.75 m above the ground is zero.
The work done by the toy car when it travels 7 m is 70 J.
The work done by the toy car when it travels 10 m is 100 J.
Work done by the toy car when it travels 2 mThe work done by the toy car when it travels 2 m is calculated as follows;
W = Fd
W = (ma)d
W = (2 x 5) x 2
W = 20 J
Work done by the toy car when it travels 1 mThe work done by the toy car when it travels 1 m is calculated as follows;
W = Fd
W = (ma)d
W = (2 x 5) x 1
W = 10 J
Work done by the toy car held 3.75 mWork is said to be done when an object is displaced from its initial position. Since the car wasn't displaced, the work done is zero.
Work done by the toy car when it travels 7 mThe work done by the toy car when it travels 7 m is calculated as follows;
W = Fd
W = (ma)d
W = 2(10 - 5) x 7
W = 70 J
Work done by the toy car when it travels 10 mThe work done by the toy car when it travels 10 m is calculated as follows;
W = 2 x (5 - 10) x 10
W = -100 J
Lear more about work done here: https://brainly.com/question/8119756
Simplify the expression in part H. Following the five payments, what is the net change in the loan amount from Qulana's viewpoint?
Answer:
I'm not sure but, this video's pretty cool: gestyy.com/eyRkH2
Explanation:
pretty scary gameplay
Answer:
After five monthly payments, Quiana’s loan amount changes by $1,237.15.
Explanation:
help me, what is the shape of solid?
Explanation:
Solids have a definite shape and definite volume.
Answer:
Solids have a definite shape and volume because the particles in them are held together tightly.
Explanation:
Liquids have a definite volume but their particles aren't held together as tightly as solids, so liquids take on the shape of the container they are in. Gases have no definite shape OR volume they just float around because the particles in them are so loose they can take on the shape and volume of any container.
A worker drives a .500kg spike into a rail tie with a 2.50kg sledgehammer. The hammer hits the spike with a speed of 65.0 m/s. If one-third of the hammer's kenetic energy is converted to the internal energy of the hammer and spike, how much does the total internal energy increase?
Answer:
The increase internal energy is 1,760.41[tex]\overline 6[/tex] J
Explanation:
The given parameters of the worker, sledgehammer, and rail line are;
The mass of the spike driven into the rail, m₁ = 0.500 kg
The mass of the sledgehammer, m₂ = 2.50 kg
The speed of the sledgehammer, v = 65.0 m/s
The fraction of the hammers kinetic energy, KE, converted to the internal energy of the hammer and the spike, Δ[tex]E_{internal}[/tex] = 1/3 × KE
Therefore, we have;
The kinetic energy, KE, of the sledgehammer is given by KE = 1/2·m₂·v²
Where;
m₂ = The mass of the sledge hammer = 65.0 m/s
v = The velocity o the sledgehammer
∴ KE = 1/2 × 2.50 kg × (65.0 m/s)² = 5,281.25 J
Therefore;
The increase internal energy, Δ[tex]E_{internal}[/tex] = 1/3 × 5,281.25 J = 1760.41[tex]\overline 6[/tex] J
Which of the following is/are true about magnetic field lines? *
Points away from the south pole and toward the north pole
Uniformly intersect other magnetic field lines
They present the direction and not the force of the magnetic field
They represent the strength of the magnetic field
All of the above
None of the above
Answer:
Explanation:
Interest to
Answer:
Points away from the south pole and toward the north pole
Explanation:
They're magnets fam
If you go twice as fast, your kinetic energy becomes. . .Immersive Reader
(1 Point)
2 times smaller
4 times smaller
2 times bigger
4 times bigger
Answer:
Our kinetic energy becomes 4 times bigger
A pitcher requires about 3 seconds to throw a baseball if the ball leaves his hand with with a speed of 30 m/s what is its acceleration
Answer:
Explanation:
300m/s2
Who created the periodic table
Answer:
Dimitri Mendeleev
In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.
determine the indication of voltmeter
Answer:
Hey mate.....
Explanation:
This is ur answer.....
A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel. It usually has a high resistance so that it takes negligible current from the circuit.
Hope it helps you,
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1.
Two children sit on a uniform seesaw such that a 400. N child is 2.0 m from the support. How
far from the center should the second child of weight 475 N sit in order to balance the system
if the support is at the center of the plank?
Answer:
The other child must sit the same meters as the N child so they an be balanced.
Explanation:
Which of the following statements about open clusters is true? Group of answer choices All stars in the cluster are approximately the same age. There is an approximately equal number of all types of stars in the cluster. All stars in the cluster are approximately the same color. All stars in the cluster have approximately the same mass. All stars in the cluster will evolve similarly.
Answer:
All stars in the cluster are approximately the same age.
Explanation:
An open cluster refers to a group of around a thousand stars such that these stars are surrounded by the nebula. All-stars in the cluster are approximately the same age. Milky Way consists of more than 1000 such open clusters.
Examples of an open star cluster areas follows:
1. Beehive
2. Hyades
3. Pleiades
Which is a process that involves collecting information and ideas that are supported by belief or opinion?
A body of mass m1 = 1.5 kg moving along a directed axis in the positive sense with a velocity
of 11 ms-1 collides head-on with a body of mass m2 = 14 kg moving in the negative sense
with a velocity of 5 ms-1. If the velocity of m1 after the collision is 1 m s-1 in the negative
sense, Apply your scientific knowledge and understanding of collisions to solve the problem
and find the final velocity of m2.
Answer:
3.71 m/s in the negative direction
Explanation:
From collisions in momentum, we can establish the formula required here which is;
m1•u1 + m2•v2 = m1•v1 + m2•v2
Now, we are given;
m1 = 1.5 kg
m2 = 14 kg
u1 = 11 m/s
v1 = -1 m/s (negative due to the negative direction it is approaching)
u2 = -5 m/s (negative due to the negative direction it is moving)
Thus;
(1.5 × 11) + (14 × -5) = (1.5 × -1) + (14 × v2)
This gives;
16.5 - 70 = -1.5 + 14v2
Rearranging, we have;
16.5 + 1.5 - 70 = 14v2
-52 = 14v2
v2 = - 52/14
v2 = 3.71 m/s in the negative direction
The final velocity of the body 2 is 3.71 m/s in the negative sense.
The given parameters:
Mass of the body 1, m1 = 1.5 kgMass of the body 2, m2 = 14 kgInitial velocity of body 1, u1 = 11 m/sInitial velocity of the body 2, u2 = - 5m/sFinal velocity of body 1, v1 = -1 m/sThe final velocity of the body 2 is calculated by applying the principle of conservation of linear momentum;
[tex]m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2\\\\1.5(11) + 14(-5) = 1.5(-1) + 14(v_2)\\\\-53.5 = -1.5+ 14v_2\\\\-52 = 14v_2\\\\v_2 = \frac{-52}{14} \\\\v_2 = -3.71 \ m/s[/tex]
Thus, the final velocity of the body 2 is 3.71 m/s in the negative sense.
Learn more about conservation of momentum here: https://brainly.com/question/7538238
The raising and lifting the ball by kicking is called
A Dodge
B. Scoop
C. Passing
D. Toe
I’ll give brainless plis
The raising and lifting the ball by kicking is a B) Scoop
When a ray is incident upon a plane mirror as shown in the diagram, what is the angle of refraction?
a) 90 degrees
b) 30 degrees
c) 0 degrees
Answer:
0 degrees
Explanation:
this is because when the light ray hits a surface a medium at 90 degrees then the angle of incidence = 0 , thus light doesn't bend when it enters the medium, no bending means angle of refraction is 0 degrees
hope this helps ,please mark it
For which angle of projection range of projectile is maximum
(a) 40°
(b) 35°
(e) 43°
(d) 48°
Answer:
the correct answer is e
Explanation:
In projectile launching, the range or distance on the x-axis is given by the expression
R = [tex]\frac{v_o^2 \ sin 2 \theta }{g}[/tex]
where v₀ is the initial velocity θ the launch angle.
When analyzing this expression is maximum when the sine function is maximum
sin 2 θ = 1
2θ = sin⁻¹ 1
2 θ = 90
θ = 90/2
θ = 45º
reviewing the answers there are no correct ones since the maximum angle occurs for 45º
if we analyze with these angles we have
θ = 40
sin 2θ = sin 2 40 = 0.98
θ = 35
sin 2 35 = 0.939
θ = 43
sin 2 43 = 0.998
θ = 48
sin 2 48 = 0.994
if we take the written angles the range is maximum for 43º
therefore the correct answer is e
An object has a charge of +2.0 uC. What is magnitude of the electric force on the object by an
electric field of 5.0 N/C?
Answer:
hahahahahahahaahahahaha
Explanation:
wala ka kwenta bobo Wala g utak 150 hahahahahahahahahahaahahahahahahahahahahahahahshahahshshshshahahahahahahahahahahahahaahahahhaahahah