Answer:
the image will be real and inverted
what is the definition of oligopoly?
Answer:
Its a state of limited competition, in which a market is shared by a small number of producers or sellers.
PLEASE HELPPPPPP <333
Answer:
Explanation:
The answer is C i think
Q7. A 2kg ball is released from a height of 20m.
What is it velocity when its height has decreased to 5
m?
Answer:
Given,
Mass, m = 2kg
Height or distance, s = 20m
Initial velocity, u = 0m/s
Acceleration due to gravity, g = 10m/s (It is 9.8m/s but can be assumed 10m/s for simplifying calculations)
(Because the object is is just dropped)
Final velocity, v = ?
Solution
v^2 = u^2 + 2as (u^2 means u raised to power 2)
=> v^2 = 0^2 + 2*10*20
=> v^2 = 400
=> v = 20
Thus the velocity just before the body strikes the ground will be 20m/s.
Which of the following compounds has a soapy feel?
co3
koh
nacl
hcooh
Answer:
koh
Explanation:
it is a basic substance that reacts with the lipids on your fingers, as soon as you touch it, to form soap
Aliens from the planet Mars can have long or short antennas. The allele for a long antenna is DOMINANT, and the allele for a short antenna is RECESSIVE. Which of the following is the pair of alleles an alien would have to inherit to have a short antenna?
Recessive, dominant
Dominant, dominant
Recessive, recessive
Dominant, recessive
Answer:
Recessive, dominant
Explanation:
umm thats the answer
Which of the following is NOT a human blood type?
a.
O
c.
B
b.
AB
d.
R
Answer:
d. R
Explanation:
There are 4 main types of blood – A, B, AB and O.
Blood is the most important component of our life. It is a fluid connective tissue which consists of plasma, blood cells and platelets. It circulates throughout the body and delivers oxygen. Among the given options R is not a blood type. The correct option is D.
What are blood types?It was Karl Landsteiner who discovered the ABO blood group system. There are 4 main blood groups, they are A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each blood group may be either RhD positive or RhD negative.
Blood group A has antigens on the red blood cells with anti-B antibodies in the plasma. Blood group B has B antigens with anti-A antibodies in the plasma. The blood group O has no antigens but both antibodies are present whereas AB has no antibodies.
Group O is the universal donor and AB is universal recepient.
Thus the correct option is D.
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What is the wavelength of the wave in the image to the left?
Graph 1
Answer:
There is no graph i can aswer it soww
Explanation:
A pendulum is constructed from a heavy metal rod and a metal disk, both of uniform mass density. The center of the disk is bolted to one end of the rod, and the pendulum hangs from the other end of the rod. The rod has a mass of =1.0 kg and a length of =49.8 cm. The disk has a mass of =4.0 kg and a radius of =24.9 cm. The acceleration due to gravity is =9.8 m/s2.
The pendulum is held with the rod horizontal and then released. What is the magnitude of its angular acceleration at the moment of release?
The magnitude of the angular acceleration of the pendulum at the moment of release is; α = 18.45 rad/s²
We are given;
Mass of rod; m = 1 kg
Length of rod; L = 49.8 cm = 0.498 m
Mass of Disk; M = 4 kg
Radius of disk; r = 24.9 cm = 0.249 m
Let us first calculate the torque acting from the formula;
τ = mg(L/2) + MgL
Thus;
τ = (1 × 9.8 × (0.498/2)) + (4 × 9.8 × 0.498)
τ = 21.96 N.m
Using parallel axis theorem, we can find the moment of inertia about the given axis as;
I = (mL²/3) + ½MR² + ML²
Plugging in the relevant values gives;
I = (1 * 0.498²/3) + ½(4 * 0.249²) + (4 * 0.498²)
I = 1.19 kg.m²
The angular acceleration is given by the formula;
α = I/τ
α = 21.96/1.19
α = 18.45 rad/s²
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When a reaction that occurs when a person experiences very strong emotion especially those associated with a perceived threat is called.
Answer:
The correct answer is - fight or flight response or reaction.
Explanation:
According to Cannon, the fight or flight reaction is a strong emotion experienced by a person especially people experiences associated with a perceived threat.
This reaction takes place in form of arousal in a perceived threat or stress conditions. It helps in maintaining the body environment in panic or stressed conditions.
A helicopter carrying Dr. Evil takes off with a constant upward acceleration of 7.0 m/s2m/s2. Secret agent Austin Powers jumps on just as the helicopter lifts off the ground. After the two men struggle for 11.0 ss, Powers shuts off the engine and steps out of the helicopter. Assume that the helicopter is in free fall after its engine is shut off, and ignore the effects of air resistance. Part A What is the maximum height above ground reached by the helicopter
Answer:
[tex]H_t= 725.8[/tex]
Explanation:
From the question we are told that:
Acceleration of Dr Evil [tex]a=7.0m/s^2[/tex]
Struggle time [tex]t=11s[/tex]
Generally the Newton's equation for Height traveled is mathematically given by
[tex]s = ut +\frac{1}{2} at2[/tex]
[tex]s = 7*121/2[/tex]
[tex]s= 423.25[/tex]
Generally the Newton's equation for Velocity at given time is mathematically given by
[tex]v= u+at \\ v= 0+7*11[/tex]
[tex]v= 77 m/s[/tex]
Generally the Newton's equation for Total Height [tex]H_t[/tex] is mathematically given by
[tex]v^2= u2+2as\\ v^2=772+2x(-9.8)s \\ s = 5929/19.6[/tex]
[tex]s=302.5m[/tex]
Therefore the total height is given as
[tex]H_t=423.3+302.5[/tex]
[tex]H_t= 725.8[/tex]
A bat emits a sonar sound wave
(343 m/s) that bounces off a
mosquito 8.42 m away. How
much time elapses between
when the bat emits the sound
and when it hears the echo?
(Unit = s)
Please help I am very confused with this topic
The time between when the bat emits the sound and when it hears the echo is 0.05 s
From the question given above, the following data were obtained:
Velocity of sound (v) = 343 m/s
Distance (x) = 8.42 m
Time (t) =?We can obtain obtained the time as illustrated below:
v = 2x / t
343 = 2 × 8.42 / t
343 = 16.84 / t
Cross multiply
343 × t = 16.84
Divide both side by 343
t = 16.84/343
t = 0.05 sThus, the time between when the bat emits the sound and when it hears the echo is 0.05 s
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Answer:
0.0491
Explanation:
A player kicks a football from ground level with an initial velocity of 27.0 m/s, 30.0° above the Horizontal. Find the distance the ball travels before it hits the ground.
Answer:
The horizontal distance traveled by the ball before it hits the ground is 64.42 m.
Explanation:
Given;
initial velocity, u = 27.0 m/s
angle of projection, θ = 30⁰
The horizontal distance traveled by the ball before it hits the ground is known as Range;
[tex]Range = \frac{u^2 sin(2\theta)}{g} \\\\Range = \frac{(27^2)sin(2 \times 30)}{9.8} \\\\Range = 64.42 \ m[/tex]
Therefore, the horizontal distance traveled by the ball before it hits the ground is 64.42 m.
7. A 3.0 kg object travels vertically at a constant
velocity of 1.5 m/s. What is the increase in
gravitational potential energy after 5.0 s?
Answer:
220.7
Explanation:
distance traveled is 1.5*5=7.5m
PE gain is MGH=3*9.81*7.5=220.7
The sun appears to move across the sky each day. What time of day will the shadow be shortest?
A. Sunrise
B. Noon
C. Sunset
D. Midnight
5. You are pulling a rubber sneaker along concrete
a. Calculate force of static friction between your sneakers (2kg) and sidewalk if coefficient of
static friction is 0.9
Answer:
Fs = 17.66 N
Explanation:
The force of static friction is given by the following formula:
[tex]F_s = \mu R = \mu W\\[/tex]
where,
Fs = The force of static friction = ?
μ = coefficient of static friction = 0.9
W = weight of sneakers = mg
m = mass of sneakers = 2 kg
g = acceleration due to gravity = 9.81 m/s²
Therefore,
[tex]F_s = \mu mg\\F_s = (0.9)(2\ kg)(9.81\ m/s^2)\\[/tex]
Fs = 17.66 N
*PLEASE HELP***
Which of the following technologies uses electromagnetic radiation with the
shortest wavelength?
O A. Wireless communications transmitter
O B. Infrared sensor on a DVD player
C. Microwave industrial drying equipment
O D. Compact fluorescent lightbulb
Answer:
A) wireless communications transmitter
Explanation:
Answer:
Compact fluorescent lightbulb
Explanation:
This is because it has the shortest wavelength
Please Help with this
Answer:
Answer will be the 2nd one. I think it will be the Answer
Is it acceleration speed or velocity
Answer:
1st speed 2.velocity 3.speed4.velocity5.velocity6.speed
PLEASE ANYBODY HELP <3
ANSWER IS = B. 60 KG
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PLEASE HELP ME IN THE QUESTION !!
a. 75 kg, The mass of an object is the amount of matter that constitutes that object and is independent of the acceleration of gravity and is constant under any circumstances.
_________________________________
b. Weight = mass × gravity acceleration
♡ On the Earth : Weight = 75 × 10
Weight = 750 N
♡ On the Venus : Weight = 75 × 8.87
Weight = 665.25 N
You are designing a solenoid to produce a 2.0-kG magnetic field. You wish to wrap your insulated wire uniformly around a cardboard tube that is 8.0 cm in diameter and 58 cm in length, and you have a power supply that will allow you to pass a current of 2.5 A through the solenoid. Determine the total length of wire you will need in order to build the solenoid you have designed.
Answer:
92.7 km
Explanation:
Since the magnetic field due to a solenoid is given by B = μ₀Ni/L where μ₀ = permeability of free space = 4π × 10⁻⁷ H/m, N = number of turns of solenoid, L = length of cardboard tube = 58 cm = 0.58 m, , i = current in wire = 2.5 A and l = length of wire.
So, N = BL/μ₀i
Since B = 2.0 kG = 2.0 × 10³ G = 2.0 × 10³ × 10⁻⁴ T = 2.0 × 10⁻¹ T = 0.2 T
So, substituting the variables into the equation, we have
N = BL/μ₀i
N = 0.2 T × 0.58 m/(4π × 10⁻⁷ H/m × 2.5 A)
N = 1.16 Tm/(31.416 × 10⁻⁷ HA/m)
N = 0.0369 × 10⁷ turns
N = 0.0369 × 10⁷ turns
N = 3.69 × 10⁵ turns
length of wire l = NC where N = number of turns and C = circumference of tube = πD where D = diameter of tube = 8.0 cm = 0.08 m
So, l = NC
= NπD
= πND
= π × 3.69 × 10⁵ turns × 0.08 m
= 0.9274 × 10⁵ m = 9.274 × 10⁴ m
= 92.74 × 10³ m
= 92.74 km
≅ 92.7 km
The total legnth of the wire to built a solenoid will be 92.7 km
What is solenoid?A solenoid is a electromagnet in which the wires are wounded on the outer surface of the soft iron and then the current is passed so due to flow of the current the magnetic field generated around the wire.
Since the magnetic field due to a solenoid is given by
B = μ₀Ni/L
where
μ₀ = permeability of free space = 4π × 10⁻⁷ H/m,
N = number of turns of solenoid,
L = length of cardboard tube = 58 cm = 0.58 m, ,
i = current in wire = 2.5 A and
l = length of wire.
Since B = 2.0 kG = 2.0 × 10³ G = 2.0 × 10³ × 10⁻⁴ T = 2.0 × 10⁻¹ T = 0.2 T
So, substituting the variables into the equation, we have
[tex]N=\dfrac{BL}{\mu_oI}[/tex]
[tex]N=\dfrac{0.2\times 0.58}{4\pi\times 10^{-7} \times 2.5}[/tex]
[tex]N=\dfrac{1.16}{31.416\times 10^{-7}}[/tex]
N = 0.0369 × 10⁷ turns
N = 0.0369 × 10⁷ turns
N = 3.69 × 10⁵ turns
length of wire l = NC where N = number of turns and C = circumference of tube = πD where D = diameter of tube = 8.0 cm = 0.08 m
So, l = NC
= NπD
= πND
= π × 3.69 × 10⁵ turns × 0.08 m
= 0.9274 × 10⁵ m = 9.274 × 10⁴ m
= 92.74 × 10³ m
= 92.74 km
≅ 92.7 km
Hence the total legnth of the wire to built a solenoid will be 92.7 km
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A 5- kg object experiences forces as shown in the diagram. Which statement best describes the motion of the object
Answer: D. The object would have an acceleration of 6 m/s/s to the right.
Explanation:
I got it right on USA test prep
Finding Dimensional Formula For x=vt+1/2at is
Answer:
In the picture above.
Explanation:
I hope that it's a correct answer for dimensional analysis.
Question below in photo!! Please answer! Will mark BRAINLIEST! ⬇⬇⬇⬇⬇⬇⬇
Answer:
it shows the Crest of the wave
LESSION 7:LIGHT UNIT TEST
PHYSICAL SCIENCE B: UNIT 4: LIGHT
17/17 answers u cheaters here you go
Answer:
I cheated on
Spanish
ELA
history
Explanation:
Answer:
thx
Explanation:
A box of weight 20N rests on a horizontal floor. A maximum horizontal force of 6N is required to move the box along the floor .If the weight of 10N is added to the box , find the minimum horizontal force required to move the box.
which process of the method a neutral object obtains an. electrical charge
45 J of work were done on the object that moved 5 meters. How much force was applied to the object?
[tex]\\ \sf\longmapsto Work\:done=Force(Displacement)[/tex]
[tex]\\ \sf\longmapsto Force=\dfrac{Work\:done}{Displacement}[/tex]
[tex]\\ \sf\longmapsto Force=\dfrac{45}{5}[/tex]
[tex]\\ \sf\longmapsto Force=9N[/tex]
Given values:
Work done,
W = 45 JDisplacement,
d = 5 mWe know that,
→ [tex]Work \ done = Force\times Displacement[/tex]
or,
→ [tex]Force = \frac{Work \ done}{Displacement}[/tex]
By putting the values, we get
[tex]= \frac{45}{5}[/tex]
[tex]= 9 \ N[/tex]
Thus the response above is right.
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What are the two forces acting on the upper magnet?
A. The magnet's weight and the magnetic force attracting
it to the lower magnet.
B. Two magnetic forces: one attracting it to the lower
magnet and another pushing it away from the lower
magnet.
C. The magnet's weight and the magnetic force pushing it
away from the lower magnet.
D. The upper magnet's weight and mass.
Answer:
b
Explanation:
I'm not so sure but it makes sense
PLEASE HELPPPPPP <333
Answer:
B. As gravity increases weight increases and as gravity decreases weight decreases
Explanation:
Option B is the correct answer.
From the information given, we can deduce that as the gravity increases, the weight also increases and as the gravity decreases, the weight decreases as well.
This is true from the given table. On earth, the gravity of the man was 9.8m/s² and his weight 588N. But get to space, moon precisely, the gravity reduced to 1.62m/s². Then we discover that such decrease in his gravity also led to the sharp decrease in the weight. The weight decreased from 588N on earth to 96N on the moon.
This actually reveals that weight and gravity are related in a way. Weight of an object is known to be the force of gravity on the object. The weight actually vary as a result of varying gravity.
Answer: b
since the pull of gravity on the moon is less we weigh less.