I need help with this

Answer:

B. Make the work you do feel easier

Answer:

Something a machine can do is Decrease the work needed to do something and a machine can also do make the work you do easier.

Explanation:

Answer:

13 yards north.

Explanation:

Distance and Displacement

A moving object constantly travels for some distance at defined periods of time. The total moved distance is the sum of each individual distance the object traveled. It can be written as:

dtotal=d1+d2+d3+...+dn

This sum is obtained independently of the direction the object moves.

The displacement only takes into consideration the initial and final points of the path defined by the object in its moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.

Coach Sweeney walks 24 yards north and 11 yards back south. If Coach Sweeney started at the origin, the first walk ends in point (0,24). After going back 11 yards, the final point is (0,13).

Since the displacement only takes the initial and final points, we can say the resultant displacement was 13 yards north.

Answer:

1.0 A

Explanation:

Answer: Explanation:

Locations above the Arctic Circle (north of 66.5 degrees latitude; 90 degrees minus the tilt of Earth's axis) receive 24 hours of sunlight.

Orbits: Sun

Answer:

(a). The value of [tex]\dfrac{N_{1}}{N_{2}}[/tex] is [tex]\dfrac{1}{20}[/tex]

(b). The output current is 0.05 A

Explanation:

Given that,

Secondary voltage = 10000 V

Primary voltage = 500 V

Primary current = 1 A

(a). We need to calculate the value of [tex]\dfrac{N_{1}}{N_{2}}[/tex]

Put the value into the formula

[tex]\dfrac{V_{s}}{V_{p}}=\dfrac{N_{2}}{N_{1}}[/tex]

[tex]\dfrac{N_{1}}{N_{2}}=\dfrac{V_{p}}{V_{s}}[/tex]

Put the value into the formula

[tex]\dfrac{N_{1}}{N_{2}}=\dfrac{500}{10000}[/tex]

[tex]\dfrac{N_{1}}{N_{2}}=\dfrac{1}{20}[/tex]

(b). We need to calculate the output current

Using formula of current

[tex]\dfrac{I_{s}}{I_{p}}=\dfrac{N_{1}}{N_{2}}[/tex]

[tex]I_{s}=I_{p}\times\dfrac{N_{1}}{N_{2}}[/tex]

Put the value into the formula

[tex]I_{s}=1\times\dfrac{1}{20}[/tex]

[tex]I_{s}=0.05\ A[/tex]

Hence, (a). The value of [tex]\dfrac{N_{1}}{N_{2}}[/tex] is [tex]\dfrac{1}{20}[/tex]

(b). The output current is 0.05 A

Answer:Resistivity of the wire is 7.065 × 10^-8 Ω m.

Explanation:

I have no idea i just googled it

Answer:

When the doctor has the syringe, it is full of air. So, now after the doctor pushes the plunger, hence the air gets released into the medicine container. After this the doctor then takes the plunger and pull it back. Now , the air gets pulled up back into the syringe, but not only does the air come in but also the medicine because of the pressure build up.

If my answer helped, please mark me as the brainliest!!

Thank You!

Answer:

1

2

3

4

Explained:

All the statement are correct about surface tension of water. Due to this force, water surface exhibit peculiar properties  compared to the bulk of the system.

Surface tension is the potential for liquid surfaces that are at rest to condense into the smallest surface area. Razor blades and insects, which have a density greater than that of water, may float on the surface of the water without even getting partially buried because to surface tension.

Surface tension at liquid-air contacts originates from the liquid molecules' stronger attraction to one another owing to cohesion than to the air molecules due to adhesion.

Surface tension is the result of water molecules pulling inward with a strong attractive force. The attractive force brings the molecules on the surface of the water close together makes attractive force causes the molecules to be drawn toward the water molecules beneath the surface.

Since there are no water molecules above the surface there are uneven forces. This causes surface tension, allowing the coin to float on the water's surface.

Find more on surface tension :

https://brainly.com/question/12514134

#SPJ2

Answer:

v= +12cm

Explanation:

m = (size of image)/(size of the object) = -v/u  

u = - 8 cm

 3/2 = -v/u 

3/2 = -v/-8 

v = +12 cm

Using mirror formula, 

1/v + 1/u = 1/f  ...(i)

1/12 + 1/(-8) = 1/f 

f = -24 cm

Focal length is 24 cm

Answer:

Yes

Explanation:

Answer:

if an object starts from rest it's initial velocity is zero

Answer:

15x6=90 meters

Explanation:

i did 15x6 because it runs 15 meters per second

brainliest? >w<

Answer:

a) Vf = 13.87[m/s]

b) t = 1 [s]

Explanation:

a)

To solve this problem we can use kinematics equations:

[tex]v_{f}^{2}= v_{i}^{2}+(2*g*h)[/tex]

where:

Vf = final velocity [m/s]

Vi = initial velocity = 4 [m/s]

h = elevation = 9 [m]

g = gravity acceleration = 9.81 [m/s^2]

[tex]v_{f}=\sqrt{(4)^{2} +(2*9.81*9)}\\v_{f}=13.87[m/s][/tex]

b)

Now using the next equation we can find the time

[tex]v_{f}=v_{i} +(g*t) \\t = (13.87-4)/9.81\\t=1[s][/tex]

Answer:

0.650

Explanation:

Move the decimal point three times to the left.

Answer:

300 miles

Explanation:

3*60 + 5*24 = 300

Answer:

Would it be starting point?

Explanation:

When you start a sport or something, you may not be good or bad at it. However, as time goes on you are going to improve.

Idk if this helps or not buh yeah

Answer:

what diagram. I can't see any

this is the graph for this equation

Answer:

there are as many atoms in a normal breath of air as there are breathfuls of air in the atmosphere of the world

Explanation:

Answer:

The distance, d travelled by the ball is 768 metres.

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of final speed from the initial speed all over time.

Hence, if we subtract the final speed from the initial speed and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

[tex]Acceleration (a) = \frac{initial \; speed - final \; speed}{time}[/tex]

[tex]a = \frac{v - u}{t}[/tex]

Where,

a is acceleration measured in [tex]ms^{-2}[/tex]

v and u is initial and final speed respectively, measured in [tex]ms^{-1}[/tex]

t is time measured in seconds.

Given the following data;

Acceleration = 12.0m/s²

Time, t = 8secs

Velocity =?

First, we would calculate its velocity;

[tex]a = \frac{v - u}{t}[/tex]

Since the ball rolls at rest, initial velocity is zero (0).

[tex]V = a * t[/tex]

[tex]V = 12 * 8[/tex]

[tex]Velocity = 96ms^{-1}[/tex]

We can now solve for the distance;

[tex] Velocity = \frac{distance}{time}[/tex]

Therefore,

[tex]Distance = velocity * time[/tex]

[tex]Distance = 96 * 8[/tex]

Distance = 768m.

Answer:

B

Explanation:

Answer:Since most of air is made of nitrogen and oxygen, which have heavier molecular weights than hydrogen, air is denser than the hydrogen-filled balloon (the atmosphere is denser than the hydrogen-filled balloon). This results in the balloon floating in the air!

Explanation:

Answer:

The normal force exerted on the skateboarder by the bump is less than the weight of the skateboarder

Explanation:

The given parameters are;

The location of the skateboarder = The top of the circular bump

The direction of motion of the skateboarder = Rightward

Therefore, given than the skateboarder has both horizontal angular motion (moving rightward) and vertical angular motion (over the bump), The effect of the weight of the skateboarder on the ground is reduced by the centripetal forces acting on the skateboarder and the normal force exerted on the skateboarder by the bump is equal to the reduced weight and is therefore less than the actual weight of the skateboarder.

The normal force exerted on the skateboarder is less than the weight due to the effect of centripetal force.

Given data:

The position of skateboarder is at top of the circular bump.

And direction of motion of Skateboarder is towards rightward.

Since, the skateboarder is undergoing the motion over the circular path, then it will have both horizontal angular motion (moving rightward) and vertical angular motion (over the bump).

The effect of the weight of the skateboarder on the ground is reduced by the centripetal forces acting on the skateboarder and the normal force exerted on the skateboarder by the bump is equal to the reduced weight and is therefore less than the actual weight of the skateboarder.

Thus, we can conclude that the normal force exerted on the skateboarder is less than the weight due to the effect of centripetal force.

Learn more about the centripetal force here:

https://brainly.com/question/14249440

Answer: D

Explanation: just completed this question on a p e x

Answer:

4.45×10¯⁷ N

Explanation:

The following data were obtained from the question:

Mass 1 (M₁) = 600 Kg

Mass 2 (M₂) = 400 Kg

Gravitational constant (G) = 6.67×10¯¹¹ Nm²Kg¯²

Sperating distance (r) = 6 m

Force (F) =.?

The gravitational force can be obtained as follow:

F = GM₁M₂ / r²

F = 6.67×10¯¹¹ × 600 × 400 / 6²

F = 1.6008×10¯⁵ / 36

F = 4.45×10¯⁷ N

Therefore, the gravitational force is 4.45×10¯⁷ N

Answer:

Amplitude

Explanation:

Explanation:

Answer:

here lol

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 1500 g

volume = 1700 mL

We have

[tex]density = \frac{1500}{1700} = \frac{15}{17} \\ = 0.88235294...[/tex]

We have the final answer as

Hope this helps you

Answer:

0.88

Explanation:

density = mass/volume

density = 1500/1700

density = 0.88

Condensation is the water on the outside of a cold cup of water on a hot day.