Evaluate u + xy, for u = 1, x = 3, and y = 6.

Explanation:

see, torque=force × perpendicular distance

...that perpendicular distance is between axis of rotation and the point where force acts... so in above's case perpendicular distance is zero... so the torque is zero!

Explanation:

Hope it will help you alot.

My answer is "Watt per square meter".

Answer: no

Explanation: speed = rate of change of distance; distance/time

                     velocity = rate of change of displacement; displacement/time

Answer:

The answer to the question is 90 cm i.e the object distance is 90 cm from the mirror.

CALCULATION:

As per the question, the focal length of the convex mirror f = 30 cm.

The magnification is: 1/4

We are asked to calculate the object distance [u].

As per the sign convention for reflection, the measurements taken along the direction of light is taken as positive and its reverse is taken as negative.

The transverse measurement above the principal axis is taken as positive and below the principal axis is taken as negative.

Hence, the focal length of the convex mirror f = +30 cm.

The image formed by a convex mirror is virtual and erect.

Hence, the magnification will be positive.

Hence, magnification m = +1/4=+0.25

The relation between focal length, magnification and object distance is given as -

m=  f/f=u

u=  m=1/m multiplyed by f

=  0.25=1/0.25 multiplyed by -(30)

=  -90 cm [ans]

   Here, the negative sign is due to the fact  that object distance is measured opposite to the direction of  light.  

(sorry, brainly didn't allow me to put pictures of the calculation)

hope this helps :)                            

Definition: When an object moves in a circular path with uniform speed, the motion is called uniform circular motion.

ac=rv2=ω2r

The statement which best describes the Oort cloud is that it contains huge icy objects and is therefore denoted as option B.

This is referred to as the mass of water drops or ice crystals suspended in the atmosphere and are of different types such as oort, cumulus etc. It is also involved in rain formation in the ecosystem.

Oort cloud on the other hand is defined as a hypothetical, spherical distribution of icy bodies located in the far reaches of the Solar system which is therefore the reason why option B was chosen as the correct choice.

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Answer:

it’s B

Explanation: I got it right

Answer:

a) mass=density x volume= 2400 x 0,20=480 Kg

b) weight= 480 x 9,81 = 4708,8 N

Answer:

Your microwave will not turn on, and you speculate that a circuit breaker in the house has been tripped. In scientific terminology, the steps would be described as: developing a hypothesis based on an observation.

Answer:

Average Acceleration = 0 m/s²

Explanation:

The average acceleration between t = 2 sec to t = 8 sec is given as follows:

Average Acceleration = (Final Velocity - Initial Velocity)/Total Time

From Graph,

Total Time = 8 sec - 2 sec = 6 sec

At t = 2 sec

Initial Velocity = 3 m/2 s = 1.5 m/s

At t = 8 sec

Final velocity = 12 m/8 s = 1.5 m/s

Therefore,

Average Acceleration = (1.5 m/s - 1.5 m/s)/ 6 s

Average Acceleration = 0 m/s²

Answer: It goes inside filling most of it .

Explanation: This happens because the bottle is empty and the bucket is full of water.

Answer: Experimental design means creating a set of procedures to test a hypothesis. A good experimental design requires a strong understanding of the system you are studying. By first considering the variables and how they are related (Step 1), you can make predictions that are specific and testable (Step 2).

Explanation:

Answer

A. a car coming to a stop at a traffic light

a) Live wire

b) It has gained extra electrons.

c) Part of circuit can be turned off while other parts remain on.

d) [tex] R=\frac{V}{I}=60 \Omega[/tex]

Answer:

Let's define the point A as our zero in the x-axis.

As the phone drops, it keeps the horizontal velocity that it had before, so the horizontal velocity is:

Vx = 3 mi/h.

Now, the only force acting on the phone is the gravitational force that acts in the vertical axis, then we have:

Ay = -g

where g = 9.8 m/s^2

It is dropped, so we do not have a vertical initial velocity, then for the vertical velocity we should integrate over time:

Vy = -g*t

And for the position again, we integrate over time, but now we have an initial position H, that is the height at which the phone is dropped.

Py = -(1/2)*g*t^2 + H

And the horizontal position can be found by integrating over time the horizontal velocity.

Px = (3mi/h)*t

This will be the two equations that describe the motion of the phone, and we can not solve it further because we do not know the initial height of the phone.

But in general, we have a linear equation in the horizontal axis and a quadratic equation with a negative leading coefficient in the vertical axis.

Position(t) = ( (3mi/h)*t,  -(1/2)*g*t^2 + H)

Answer:

yes he is running at 3 mph

Explanation:

because im the teacher

Answer:

It will take the person 10 seconds to run a 30-meter city block.

Explanation:

To solve this problem, we must remember the formula for velocity:

velocity = displacement/time

If we plug in the values that we are given, we get:

3 m/s = 30 m/time

We can see from the above equation that our answer should be in seconds, so we can get rid of the units to simplify the equation slightly.

3 = 30/t

Next, we can multiply both sides by t:

3t = 30

Then, we should divide both sides of the equation by 3 to get the variable t alone on the left side of the equation.

t = 10

Therefore, the correct answer is 10 s.

Answer:

2.2 m/s

Explanation:

use the formula to find meters per second

Answer:

The density of the substance precisely is 2142.8571428571, but you could always round the answer to something else.

Explanation:

The formula for finding density is ρ (density) equals mass over volume.

75 grams over 35 mL = 2.1428571428571 gram/mL = 2142.8571428571 kilogram/cubic meter.

Hope this helped. :)

Answer:

Explanation:

If I am not wrong

current = charge/time

All you have to take care of is the units should be in the same system

so

current = 12/(2*60)         ---------  2 min = 2*60 sec

current  = 12/120  = 0.1 amp

Answer:

[tex] \boxed{\sf Focal \ length = 10 \ cm} [/tex]

Given:

Radius of curvature (R) of a spherical mirror = 20

To Find:

Focal length (f)

Explanation:

Formula:

[tex] \boxed{ \bold{\sf Focal \ length \ (f) = \frac{Radius \ of \ curvature \ (R)}{2}}}[/tex]

Substituting value of R in the equation:

[tex] \sf \implies f = \frac{20}{2} [/tex]

[tex] \sf \implies f = \frac{ \cancel{2} \times 10}{ \cancel{2}} [/tex]

[tex] \sf \implies f = 10 \: cm[/tex]

Focal length = 10 cm.

Solution :

Given radius of curvature = 20 cm.

Formula :

Focal length = Radius of curvature/2

→ Focal length = 20/2

→ Focal length = 10 cm.

Answer : 10 cm.

[tex] \huge{ \underline{ \underline{ \red{ \bf{Solution:}}}}}[/tex]

We know that, Newton's second law of motion states that Force is the product of mass and Accleration which is actually derived from the original statement, Rate of change of momentum is directly proportional to Force applied and acts in the same direction of force.

According to this,

[tex] \large{ \cdot{ \boxed{ \rm{f = m \times a}}}}[/tex]

Where,

So, By using formula,

➝ F = m × a

➝ 180 N = 15 kg × a

➝ 15a = 180

➝ a = 180/15 = 12 m/s²

❍ Accleration of the body = 12 m/s²

Hence, solved !!

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[tex]\tt {\pink{Given}}\begin{cases} \sf{\green{Force=180 \: newtons}}\\ \sf{\blue{Mass=15 \: kg}}\\ \sf{\orange{Acceleration= \: ?}}\end{cases}[/tex]

Answer:

[tex]\qquad \: \tiny\dag\:\underline{\tt By \: applying \: Newtons \: second \: law \: of \: motion \: we \: get : } \\ \\ [/tex]

[tex]:\implies\sf F = ma \\ \\ [/tex]

[tex]\tt {\pink{Where}}\begin{cases} \sf{\green{F=Force}}\\ \sf{\blue{m=Mass}}\\ \sf{\orange{a=Acceleration}}\end{cases}[/tex]

[tex]\qquad\tiny\dag\:\underline{\tt Now,substituting\: the \: given \: values \: in \: above \: Formula \: we \: get :} \\ \\ [/tex]

[tex]:\implies\sf 180 = 15 \times Acceleration \\ \\ \\ [/tex]

[tex]:\implies\sf Acceleration = \dfrac{180}{15} \\ \\ \\ [/tex]

[tex]:\implies \underline{ \boxed{\textsf{ \textbf{ Acceleration = 12 m/s$^2$ }}}} \\ \\ \\ [/tex]

[tex]\therefore\underline{\textsf{ Acceleration produced by the box is \textbf{12 m/s$^2$}}}. \\ [/tex]

Answer:

[tex] \boxed{ \boxed{ \sf{see \: below}}}[/tex]

Explanation:

[tex] \underline{ \bold{ \underline{ \huge{ \boxed{ \sf{gravitational \: force}}}}}}[/tex]

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According to Newton, the bodies in the universe attract each other. This force if attraction is called force of gravitation. For example, the earth attracts the moon and the moon attracts the earth too. Similarly, the earth attracts the Jupiter and the Jupiter attracts the Earth.

The effect of force of attraction of a big body on a small body can be observed but that of a small body on a big one cannot be observed. The sun is so large that even the sum of the masses of all its planets and the satellites is only about 0.0015th part of mass of the sun. Due to the gravitational force between the sun and the earth, the earth keeps on moving around the sun. Similarly, the gravitational force between the satellites and planets makes the satellites to revolve around the planets. So, The gravitational force is responsible for the existence of solar system. The effect of gravitation can be experienced more on liquid than solid. Hence, we see tides in the sea and ocean due to the force of gravitation of the moon and the sun on the earth when they lie on the same straight line.

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Hope I helped!

Best regards!!

Answer:

1.Power

2.warming

3.preserve

4.less

5.Paper

6.Fossil

7.ride cycle

8.Non renewable energy sources

Please check it once and reply

Answer:

Explanation:

The main aim of pokhara regional international airpot project​ is to provide improved air transportation services to the people. It will also strengthen the country's civil aviation sector and contribute to economic and social development, as well as tourism.

hope this helps

plz mark as brainliest!!!!!!

The main aim of Pokhara regional international airport project is to improve the country's aviation services and contribute to economic and social development as well as tourism.

(5 L/m)x(1,440 m/da)x(365 da/yr)x(20yr)

That's 52,560,000 Liters, or 52,560 m^3.

Answer:

[See Below]

Explanation:

Your average speed would be 204.35 mph.

Answer:

t = 20 s

Explanation:

145 m = 9 m/s × t – 35m

We can obtain the value of t in seconds by doing the following:

145 m = 9 m/s × t – 35m

Add 35 m to both side as shown below:

145 m + 35 m = 9 m/s × t – 35m + 35 m

180 m = 9 m/s × t

Divide both side by 9 m/s

t = 180 m / 9 m/s

t = 20 s

Therefore, the value of t is 20 seconds.

Answer: In statistics, a perfect positive correlation is represented by the ... variables in question move together by the exact same percentage ... Positive correlation is a relationship between two variables in which both variables move in ... other variable decreases, or one variable increases while the other increases.

Explanation:

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Percent error is a mathematical way of showing accuracy, dependent variable is what is measured and affected during the experiment, independent variable is what is changed by the researcher.

Percent error is the difference between the estimated value and the actual value in comparison to the actual value of the experiment and is expressed as a percentage value. In other words, the percent error is the relative error multiplied by the number 100.

Direct relationship is a relationship between any two variables whereby both the variables increase or decrease together. Directly affect each other.

Inverse relationship is a relationship between any two variables whereby one variable increases and the other variable decreases. The variables affect each other but inversely.

An independent variable is the variable which is changed by the researcher through the experiment.

A dependent variable is the variable which is measured and affected during the experiment and it often described as being dependent on the independent variable of the experiment.

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Answer:

Well it really depends because he found out about a lot of things in a lot of scientific fields actually. He is known for contributing Pascal's triangle and probability theory. He also invented an early digital calculator and a roulette machine. In the field of physics, Blaise contributed to the study of atmospheric pressure by discovering that vacuums are real and exist in the real world.

Answer:

Well it really depends because he found out about a lot of things in a lot of scientific fields actually. He is known for contributing Pascal's triangle and probability theory. He also invented an early digital calculator and a roulette machine. In the field of physics, Blaise contributed to the study of atmospheric pressure by discovering that vacuums are real and exist in the real world.

Explanation:

First of all see the attachment for better understanding[tex].[/tex] :D

Eq. resistance between C and D :

➝ 1/Rp = 1/6 + 1/6

➝ 1/Rp = 2/6

➝ Rp = 3Ω

Eq. resistance of upper part :

(All three are in series)

➝ Rs = 3 + 3 + 3

➝ Rs = 9Ω

Eq. resistance of lower part :

(Both are in series)

➝ Rs' = 3 + 3

➝ Rs' = 6Ω

Eq. resistance between A and B :

(Rs and Rs' are in parallel)

➝ 1/Req = 1/Rs + 1/Rs'

➝ 1/Req = 1/9 + 1/6

➝ 1/Req = (2 + 3)/18

➝ Req = 18/5

Answer:

Explanation:

Eq. resistance between C and D :

➝ Rp = 3Ω

Eq. resistance of upper part :

➝ Rs = 9Ω

Eq. resistance of lower part :

➝ Rs' = 6Ω

Eq. resistance between A and B :

➝ Req = 18/5

➝ Req = 3.6Ω