You inject your patient with 2.5-mL of medicine. If the inside diameter of the 31-gauge needle is 0.114 mm and the
injection lasts 0.90 s.
1) Determine the speed of the fluid as it leaves the needle. (Express your answer to two significant figures.)

Answer:

halve the slit separation

Explanation:

As we know that

In YDS experiment, the equation of fringe width is as follows

\(\beta = \frac{\lambda D}{d}\)

where,

D denotes the separation in the middle of screen and slits

d denotes the distance in the middle of two slits

And to increase the Δx we have to decrease the d i.e, the distance between the two slits

Hence, the first option is correct

In an inelastic collision, there is a loss of kinetic energy. Also, the momentum remains conserved in the inelastic collision.

Hence, the momentum is the quantity that is conserved in an inelastic collision.

For this circuit, the voltage is 4.2 V. then power given is 0.9 W and receiving across 55Ω resistance is 0.07 W and that of 30Ω resistance is 0.14 W. Resistor are connected in parallel, its equvalent resistance is R₁R₂/R₁+R₂.

Both resistor are connected in parallel hence their equivalent resistance in parallel combination is given as,

R = 55*30/(55+30)

R = 19.4 Ω

Power given to the circuit is,

P = V²/R = 4.2/19.4 = 0.9 W

Receiving power taken from 55Ω resistor

P = V²/R = 4.2/55 = 0.07 W

Receiving power taken from 30Ω resistor

P = V²/R = 4.2/30 = 0.14 W

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First, let's draw a diagram of the problem:

Since the force applied is not parallel to the direction of the movement, let's calculate the horizontal and vertical components of the force:

Now, let's calculate the friction force:

If the block is moving at constant speed, the horizontal component of the applied force is equal to the friction force:

a.

The work done by the worker force is given by:

(the vertical component of this force does no work, since there is no vertical movement. All the work is done by the horizontal component)

b.

The increase in thermal energy is given by the work done by the friction force.

Since the friction force is equal to the horizontal component of the applied force, the work done by them has the same magnitude, so the increase in thermal energy is 556.41 J.

Our solar system currently consists of nine planets. completes one rotation around the centre of the milky way every 250 million years. The correct option is (C).

Around 4.5 billion years ago, gravity pulled a cloud of gas and dust together, forming our solar system.

The Sun is the parent star of the solar system and by far its most important element. It is categorised as a yellow dwarf with a medium size.

The Sun is the centre of the solar system, which also includes the eight planets, their 162 known moons, the three currently known dwarf planets, each with four known moons, and thousands of other minor bodies. Asteroids, meteoroids, comets, and interplanetary dust fall under this final category.

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Answer:

15.0m

Explanation:

10.0+5.0

=15.0m

Answer:

70m/s²

Explanation:

we will use the first equation of Dalton to find it

A bat is flying at a wall and making a constant 1,70 kHz sound. The bat must fly at a speed of 0.8 m/s in order to detect an 8.00 Hz beat frequency.

The frequency of a repeated event is its number of instances per unit time. It differs from angular frequency and is sometimes referred to as sampling rate for clarification. The unit of frequency is hertz (Hz), or one occurrence per second.

The spring constant of a standing human body is approximately 7.5 Hz, and the rate of a sitting position in a cab is typically 4-6 Hz, according to the research that has already been done. Table 1 displays the natural frequencies of the major body parts.

Frequency = 1.70 kHz

New frequency = 8.00 Hz

V = ?

8.00 / 1700 = 2 * v / 340m/s

v = 0.8 m/s

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The plates of the Earth's crust are described as  Large pieces of lithosphere that fit together like a jigsaw puzzle.

Therefore option A is correct.

What is the lithosphere?

The  lithosphere is described as the rigid, outermost rocky shell of a terrestrial planet or natural satellite.

The Earth's crust is made up of  of several large tectonic plates that move relative to one another.

These plates are made up of the rigid outer layer of the Earth called the lithosphere.

In conclusion, lithosphere is broken up into a number of pieces or plates that fit together just as  a jigsaw puzzle.

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Answer:

Frick is pushing harder

Explanation:

if Frack weighs more and he was pushing harder they would be moving, but if Frick pushes harder then they wont move

Answer:

they are both pushing with the SAME force

Explanation:

Since no one is moving, the system of the two friends is NOT accelerated, which means that the net force on it is zero. then, the force applied by each is of the SAME magnitude but in opposite directions.

Therefore they are both pushing with the SAME force.

Answer:

FA < FB = FC

Explanation:

The buoyant force is equal to the weight of the displaced water.

The two that sink displace the same amount of water and therefore have the same buoyant force. The one that floats displaces less than its full volume of water and therefore has a lower buoyant force. Its buoyant force will equal its weight.

You do not have an answer option for the correct solution.

Answer:

The cell will have no electromotive force in it.

Explanation:

The battery provides the chemical energy that produces the force needed to move electron around the circuit and to generate electrical energy.

The average acceleration of the motorcycle over the given distance is approximately 9.39 m/s².

To calculate the average acceleration of the motorcycle, we can use the formula:

Average acceleration = (final velocity - initial velocity) / time

First, let's convert the final velocity from km/h to m/s since the distance is given in meters. We know that 1 km/h is equal to 0.2778 m/s.

Converting the final velocity:

Final velocity = 78 km/h * 0.2778 m/s = 21.67 m/s

Since the motorcycle starts from rest (initial velocity is zero), the formula becomes:

Average acceleration = (21.67 m/s - 0 m/s) / time

To find the time taken to reach this velocity, we need to use the formula for average speed:

Average speed = total distance/time

Rearranging the formula:

time = total distance / average speed

Plugging in the values:

time = 50 m / 21.67 m/s ≈ 2.31 seconds

Now we can calculate the average acceleration:

Average acceleration = (21.67 m/s - 0 m/s) / 2.31 s ≈ 9.39 m/s²

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Answer:

duvergentv boundaries

Given:

The potential difference V=3000 V

The radius of curvature of the curved path of the electron, r=26.0 cm=0.26 m

The velocity of the electron, v=32.5 Mm/s=32.5×10⁶ m/s

To find:

The magnitude of the magnetic field.

Explanation:

The magnetic force acting on the electron provides it the neccessary centripetal force to trace a curved path.

Thus the centripetal force acting on the electron is equal to the magnetic force acting on it.

Therefore,

Where m is the mass of the electron, e is the charge of the electron, and B is the magnitude of the magnetic field.

On rearranging the above equation,

On substituting the known values,

Final answer:

The magnitude of the magnetic field is 710 μT.

The object distance of the lens is 10 cm and the image distance of the lens is 30 cm.

The object and image distance formed by the lens is calculated by applying the following lens formula.

v + u = 40 ------- (1)

v/u = 3 ------------ (2)

v = 3u

Substitute v into equation (1);

3u + u = 40

4u = 40

u = 40/4

u = 10 cm

The image distance = 3u

= 3 x 10 cm

= 30 cm

Thus, the object distance is 10 cm and the image distance is 30 cm.

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Answer:

372.94 km

d= st

= (64.3 km/h)(5.8h)

=372.94 km

Explanation:

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in

Answer:

hich graph represents this system?

y = 2 x + 1. y = negative 4 x + 7.

On a coordinate plane, a line goes through (0, 7) and (1, 3) and another goes through (1, 3) and (2, 5).

On a coordinate plane, a line goes through (negative 4, 0) and (0, 7) and another line goes through (negative 4, 3) and (0, 1).

On a coordinate plane, a line goes through (0, negative 4) and (1, 3) and another goes through (0, 2) and (1, 3).

On a coordinate plane, a line goes through (0, 7) and (8, 5) and another line goes through (0, 1) and (8, 5).

Explanation:

asdfgh

Answer:

the thigh bone is a femur

the femur is a long bone so therefore the type of bone is a long bone !

Explanation:

Ecology is the study of the way all living things relate to each other in the world.

This is referred to as the science which deals with the study of organisms and how they interact with their environment. It comprises of the study of the organisms present and their habitat.

Their habitat is the area where they live which comprises of many resources such as food, water etc which are needed for their growth and survival. The living things interact with it for beneficial reasons and is the reason why Ecology was chosen as the correct choice.

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From the graphic of the standing wave patterns:

a. The harmonics  shown in each of the strings below are:

A - 2nd harmonic; B - 3rd harmonic; C - 1st harmonic; D - 4th harmonic

b. the nodes are the fixed or closed points and the antinodes are the points of maximum upward or downward displacement.

c. The number of wavelengths that each standing wave contains are:

A - 2 wavelengths; B- 3 wavelengths; C - 1 wavelength; D - 4 wavelengths

d. the wavelength of each standing wave is:

A - 1.5 m; B - 5.0 m; C - 3 m; D - 3.75 m

A standing wave pattern is produced within the medium when the vibrational frequency of the source causes incident waves from the source to interact with reflected waves from one end of the medium.

Some locations along the medium appear to be stationary as a result of this interference.

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Answer:

C. a liter of salt water.

Explanation:

Defination of Solution =>

a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).

Answer:

Option A. 4 m

Explanation:

Please see attached photo for diagram.

In the attached photo, X is the distance from the centre to which the student on the right must sit in order to balance the seesaw.

Clockwise moment = X × 45

Anticlock wise moment = 3 × 60

Clockwise moment = Anticlock wise moment

X × 45 = 3 × 60

X × 45 = 180

Divide both side by 45

X = 180 / 45

X = 4 m

Thus, the student must sit at 4 m from the centre.

The distance from the center the student on the right will be if they want the

seesaw to stay parallel to the ground is 4m

The question tells us that X is the distance to the center , each side of the

see saw is 5m with total length being 10m. This is explained in the

attached picture.

Clockwise moment = X × 45

Anticlock wise moment = 3 × 60

Clockwise moment = Anticlock wise moment

X × 45 = 3 × 60

X × 45 = 180

           = 180 / 45

            = 4m

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Answer:

1) 29.82 cm

2) 5.76 cm

3) 35.58 cm

Explanation:

Part 1)

The force of a spring is equal to:

F = kΔx

Where k is the constant of the spring and Δx is the elongation. Δx = xf - xi, where xf is the length of the spring when the force is applied and xi is the empty length. Then

F = k(xf - xi)

Now, by the action of a force of 51N, a spring measures 39 cm, so

51 = k(39 - xi)

And by the action of a force of 61N, the spring length is 40.8 cm, so

61 = k(40.8 - xi)

To find the empty length, we need to solve the system of equations

51 = k(39 - xi)

61 = k(40.8 - xi)

First, solve the first equation for k

Then, replace this on the second equation and solve for xi

Therefore, the empty length of the spring is 29.82 cm

Part 2)

Now, we need to calculate the value of k, so replacing xi = 29.82, we get:

Therefore, the equation for the force is

F = 5.556Δx

Solving for Δx, we get:

Δx = F/5.556

Replacing the force by 32N, we can calculate the elongation as

Δx = 32/5.556 = 5.76 cm

Part 3)

Then, the length can be calculated by solving the following equation for xf

Δx = xf - xi

xf = Δx + xi

Replacing Δx = 5.76 cm and xi = 29.82 cm, we get:

xf = 5.76 cm + 29.82 cm

xf = 35.58 cm

So, its length is 35.58 cm

Therefore, the answers are

1) 29.82 cm

2) 5.76 cm

3) 35.58 cm

Answer:

10. B

13. It's actually 30 seconds but 20 comes closest so B

14. B, any type of stretching is good before you perform any type of physical activity because it loosens up the muscles

15. D, all of the above

Explanation:

I have done many sports in my life and am still very active, I grew to know most of these things through the years.

Answer:

energy can neither be created nor be destroyed. Although, it may be transformed from one form to another.

Explanation:

mark brainiest?

Answer:

According the law of conservation of energy , energy is not created or destroyed

Answer:

i believe its temperate

Explanation:

The climate zone that has hot summers, cold winters, and average amounts of precipitation throughout the year is the temperate climate zone. So, option C is correct.

Climatic zones are defined as the areas that have different climatic conditions over the world.

Here,

The climate zone that hot summers, cold winters and average amounts of precipitation throughout the year is the temperate climate zone.

The temperate climate zones are the areas that have mild temperature condition that are located between the subtropical and the polar regions. These are zones with moderate rainfall that is throughout the year. The temperature in this zone will change greatly between the summer and winter seasons. These zones are hotter during the summer and very cold during the winter.

The temperate zone has an average precipitation of 800 mm.

Hence,

The climate zone that has hot summers, cold winters, and average amounts of precipitation throughout the year is the temperate climate zone.

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Answer:

5000 grams

Explanation:

recall that 1 kg is equivalent to 1000 grams

hence 5 kg = 5 x 1000 grams = 5000 grams