1500 + 30.4 = ? Use the correct number of significant figures. plz plz help me

Answer:

Objects are affected by gravity the same, but air resistance can affect the speed of an object's descent. An object with more surface area will have more air resistance.

Explanation:

The more surface area the object has to get through the air particles, the slower it will take to fall. ... In space, there is no air

Answer:

20.2 m

Explanation:

Given that Vanessa runs on the soccer field 20 meters North, then makes a cut to the right going East for 3 meters. What is Vanessa’s displacement from her original spot?

The Vanessa displacement can be calculated by using pythagorean theorem.

Displacement = sqrt( 20^2 + 3^2 )

Displacement = sqrt( 400 + 9 )

Displacement = sqrt( 409)

Displacement = 20.2 m

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The female silk moth lays eggs. When the eggs hatch a tiny Caterpillar comes out, This is the Silkworm or Larva. The silkworm feeds on leaves and grass. When it is ready to enter the next stage in its lifecycle, it first weaves a net around itself. It then secrets a fibre made up of proteins which hardens on exposure to air. This is the Silk fibre. It covers itself completely with this fibre to form a cocoon at this stage the Larva is called Pupa. The Pupa grows and changes inside the cocoon. A few weeks later the cocoon opens and an adult moth come out.

━━━━━━━━━━━━━━━━━━━━

Teleportation (artificial or natural over wormhole).

Answer:

the Battery of the phone contains chemical energy which transfers Light and Sound energies.

Answer:

Explanation:

Given that the force 40N F acting on the Cartesian x and y coordinates and forming an angle of 30 ° to the positive x-axis, the vector of the force component about the horizontal and vertical axes will be expressed as shown;

For the component force x;

Fx = Fcostheta

You know that F = 40N and theta = 30 °

Fx = 40cos30 °

Fx = 40 * √3 / 2

Fx = 40√3 / 2

Fx = 20√3 N

For the component force y;

Fy = Fsintheta

You know that F = 40N and theta = 30 °

Fy = 40sin30 °

Fy = 40 * 1/2

Fy = 20 N

Therefore, the vector components with respect to the x-axis and the y-axis are 20√3 N and 20N, respectively.

Answer:

It is in contact with two vertical rails which are joined at the top. The rails are without friction and resistance. There is a horizontal uniform magnetic field of magnitude B perpendicular to the plane of the ring and the rails.

Explanation:

Not sure if this is correct but pls give thanks anyway!

Answer:

C. observations

Explanation:

a scientist have to observe somethng to find the answers or solve problems

Answer:

They are describing their displacement

Explanation:

The correct answer would be that they are describing their displacement.

Distance is a scalar quantity while displacement is a vector quantity. A scalar quantity only has magnitude without any indication of the direction while a vector quantity has both magnitude and direction.

Hence, if someone travels 50 km east, the distance they covered is only 50 km while the displacement is 50 km in the eastward direction.

Answer:

8

Explanation:

Charge = protons − electrons

2 = 10 − e

e = 8

Explanation:

because of the weight of the person sitting on it ...also frictional force increases

Answer:

we use the formula,

[tex]v {}^{2} = u {}^{2} + 2gh[/tex]

[tex]89 {}^{2} = 76 {}^{2} + 2(10)h[/tex]

[tex]h = (89 {}^{2} - 76 {}^{2} ) \div 20[/tex]

h= 107 m

Answer

the most useful question to debunk this claim is

Could there be another reason why Dave remained quiet?

Explanation:

Because its possible Dave could have known something but he choose to be quite because of another reason, as thus will debunk that he knows nothing about the topic

Answer:

A pie is cooked in an oven at 200 °C. The aluminium film that covered the pie can be touched soon after it is removed while the pie is still dangerously hot, explain this.

Explanation:

i think "Barsaman Pun"

Explanation:

BARSAMAN PUN IS THE CURRENT ELECTRIC MINISTER OF NEPAL.

Answer:

The frequencies of the first four harmonics are 248 Hz, 496 Hz, 744 Hz, and 992 Hz

Explanation:

Given;

fundamental frequency, f₀ = 248 Hz

Frequency of the nth harmonic = n x fundamental frequency

First harmonic, f₁ = 1 x f₀ = 248 Hz

Second harmonic;

2f₀ = 2 x 248 Hz = 496 Hz

Third harmonic

3f₀ = 3 x 248 Hz = 744 Hz

Fourth harmonic

4f₀ = 4 x 248 Hz = 992 Hz

Therefore, the frequencies of the first four harmonics are 248 Hz, 496 Hz, 744 Hz, and 992 Hz

Answer:

11.63

Explanation:

Answer:

the answer is 0.7

Explanation:

because in this this case he asked nearest millimeter so the anwer can be qualified as 0.7 you can covert this into cos tita

A 0.7 m

A meter ruler is a gadget or a sort of ruler that is used to measure the length and distance of various objects.

A meter rule has a length of one meter, which is equal to one hundred centimeters, as the name suggests.

According to the questions,

On a metric ruler, each individual line represents a millimeter (mm). The numbers on the ruler represent centimeters (cm). There are 10 millimeters for each centimeter. To read a metric ruler, each individual line represents .

As 0.7m = 70cm =700mm

Meter ruler can measure up to 100 cm. As the meter ruler is of 1m.

A metre ruler has a length of one metre, which is equal to one hundred centimetres, as the name suggests. A metre rule, on the other hand, is divided into smaller units called millimetres, with each centimetre divided into ten millimetres.

A metre rule, on the other hand, is divided into smaller units called millimetres, with each centimetre divided into ten millimetres.

As a result, up to one millimetre, a metre rule can be used to measure the shortest length.

A metre rule can be used for more than just measuring distances; it can also be used to draw straight lines and cut blades.

Therefore,

0.7m reading is shown to the nearest millimeter.

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Answer:

Child maltreatment or child abuse is a phenomenon of sexual, physical,  and/or psychological abuse of children.

Five different psychological perspectives of childhood maltreatment are as follows:

Answer:

Respuesta correcta, opción D: Es la fuerza que un cuerpo ejerce perpendicularmente sobre el área en la que actúa.

Explanation:

La definición de presión es la fuerza que un cuerpo ejerce en dirección perpendicular sobre el área en la que actúa.

Cuando se aplica una fuerza sobre la superficie de un cuerpo, la presión es la siguiente:

[tex] P = \frac{F}{A} [/tex]

En donde:

F es la fuerza aplicada.

A es el área del cuerpo.  

Por lo tanto la opción correcta es la D: es la fuerza que un cuerpo ejerce perpendicularmente sobre el área en la que actúa.

Espero que se sea de utilidad!      

Explanation:

The speed of the red car, relative to the blue car, is:

v = 75 m/s − 50 m/s

v = 25 m/s

Answer:

1.) 0.68 g/cm^3

2.) 4.3 × 10^16 m^2

Explanation:

Given that the radius of the planet Saturn is 5.85 ✕ 107 m, and its mass is 5.68 ✕ 1026 kg.

Where (The volume of a sphere is given by 4/3 πr3.)

Substitutes r into the parameters

V = 4/3π × ( 5.85 × 10^7)^3

V = 8.39 × 10^23 m^3

Convert cubic meters to cubic centimeters by multiplying the result by 1000000

V = 8.39 × 10^29 cm^3

The mass in gram will be

5.68 ✕ 10^26 × 1000 = 5.68 × 10^29g

Density = mass/ volume

Substitute all the parameters into the formula

Density = (5.68 × 10^29) / (8.39 × 10^29)

Density = 0.68 g/cm^3

2.) The surface area of a sphere is given by 4πr^2.

Substitute r into the formula

Surface area = 4π × (5.85 ✕ 10^7) ^2

Surface area = 4.3 × 10^16 m^2

Answer:

Volume, [tex]V=23.8\ cm^3[/tex]

Explanation:

It is given that,

Mass of small object of brass, m = 200 g

The density of brass is 8.4 g/cm³

We need to find the volume of the brass object. Density is equal to mass of an object per unit its volume.

So,

[tex]d=\dfrac{m}{V}[/tex]

V is the volume of the brass object

[tex]V=\dfrac{m}{d}\\\\V=\dfrac{200\ g}{8.4\ g/cm^3}\\\\V=23.8\ cm^3[/tex]

So, the volume of the brass object is [tex]23.8\ cm^3[/tex].

The volume of the brass object is 23.81 cm³.

Density is the ratio of the mass of a body and its volume. The S.I unit is kg/m³

To calculate the volume of the brass, we make use of the formula below

D = m/V................. Equation 1

Where D = density of the brass object, m = mass of the brass object, V = volume of the brass object.

make V the subject of equation 1

V = m/D.............. Equation 2

From the question,

Given: m = 200 g, D = 8.4 g/cm³

Substitute these values into equation 2

V = 200/8.4

V = 23.81 cm³

Hence, The volume of the brass object is 23.81 cm³

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Answer:

If the ball is accelerating down through the air with no horizontal motion, the net forces acting on the ball must follow: C. The gravitational force is greater than the drag.

Explanation:

This is because the gravitational force is directed downward and the drag force opposes the direction of motion (therefore the drag force is directed upwards).  Since the ball is accelerating downwards, the gravitational force must be greater than the drag force in order to create this acceleration.

We know that the other options are incorrect because if the net force on the ball was directed upwards, the ball would be accelerating upwards.  If the net force on the ball was zero, the ball would not be accelerating at all.  If the drag was greater than the gravitational force, then the ball would be accelerating upwards as well.

Hope this helps!

Explanation:

Speed = 100/20 = 5cm/s

Option A is the correct answer

Speed = Distance/Time, therefore the speed of the mouse is 5 cm/s. Hence, option A is correct.

The pace at which a distance changes over time is referred to as speed. It has a dimension of time distance. As a result, the fundamental unit of time and the basic unit of distance are combined to form the SI unit of speed. Thus, the meter per second (m/s) is the SI unit of speed.

You can determine an object's speed if you know how far it moves in a given amount of time. For instance, an automobile is moving at a pace of 70 miles per hour if it covers 70 miles in an hour (miles per hour).

If you know how far something has traveled and how long it took to get there, you can calculate its average speed. Speed is calculated as speed = distance/time. Hence, option A is correct.

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Answer:

Explanation:

1 cm =10mm so 800cm is equal to 8000mm.so b is the correct answer

Answer:

X = 12N

Explanation:

Anticlockwise moment = Clockwise moment

Taking the moment at the pivot,

Anticlockwise moment = X×2.0m

Clockwise moment = (2.0N × 4.0m) + (4.0N × 4.0m)

Hence, 2X = (8 + 16)

2X = 24

X = 12N.

I HOPE IT'S OK.

Answer:

B = 5.3x10⁻¹⁷ T

Explanation:

The magnetic field can be calculated as follows:

[tex]B = \frac{\mu_{0}I}{2\pi R}[/tex]

Where:

μ₀: is the magnetic permeability = 4πₓ10⁻⁷ H/m

I: is the current          

R: is the distance between the magnetic field and the beam = 1.5 m

The current is:

[tex] I = 2.5 \cdot 10^{9} p/s*1.6 \cdot 10^{-19} C/p = 4.0 \cdot 10^{-10} A [/tex]

Hence, the magnetic field is:            

[tex]B = \frac{\mu_{0}I}{2\pi R} = \frac{4\pi \cdot 10^{-7} H/m*4.0 \cdot 10^{-10} A}{2\pi*1.5 m} = 5.3 \cdot 10^{-17} T[/tex]

Therefore, the magnetic field is 5.3x10⁻¹⁷ T.

I hope it helps you!  

The magnetic field will be "[tex]5.3\times 10^{-17} \ T[/tex]".

According to the question,

Magnetic permeability, [tex]\mu_0 = 4 \pi\times 10^{-7} \ H/m[/tex]

Distance between magnetic field and beam, R = 1.5 m

The current (I) will be:

= [tex]2.5\times 10^9\times 1.6\times 10^{-19}[/tex]

= [tex]4.0\times 10^{-10} \ A[/tex]

hence,

The magnetic field (B) be:

= [tex]\frac{\mu_0 I}{2 \pi R}[/tex]

By substituting the values,

= [tex]\frac{4 \pi\times 10^{-7}\times 4.0\times 10^{-10}}{2 \pi\times 1.5}[/tex]

= [tex]5.3\times 10^{-17} \ T[/tex]

Thus the response above is appropriate.

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Answer:

Let's define the North as the positive y-axis.

At t = 0s (t is the variable of time) we know that Raul is 30m at the South, so in our system, the position of Raul at t = 0s is:

p(0s) = -30m

After 5 seconds, at the time t = 5s, we know that the position of Raul is 20m at the North, so now the position is:

p(5s) = 20m.

a) First, speed is calculated as distance over time, or:

S = ( p(5s) - p(0s))/5s = (20m - (-30m))/5s = 50m/5s = 10m/s.

b) The displacement is defined as the difference between the final position and the initial position:

Displacement = p(5s) - p(0s) = 20m - (-30m) = 50m.

Now, knowing the speed is 10m/s, we can write the movement equation as:

p(t) = 10m/s*t + p(0s) = 10m/s*t - 30m

So the displacement at a time t is:

D = p(t) - p0s = 10m/s*t - 30m - (-30m) = 10m/s*t

c) the position one minute after he started will be:

p(1min)

But we have our equation in seconds, so we write 1min = 60s

p(60s) = 10m/s*60s - 30m = 600m - 30m = 570m