PLSSSS HELPPPP PLSSSS 25 POINTS PLS I REALLY NEED THIS AND GET THEM RIGHT SO PLS DONT ANSWER IF U DONT KNOW

Answer:

[tex]\dfrac{-1}{2}[/tex]

Explanation:

We need to divide the second number by the first number and the numbers are 3/4,-3/8​.

First number = 3/4

Second number = -3/8

Dividing the second number by the first number.

So,

[tex]\dfrac{\dfrac{-3}{8}}{\dfrac{3}{4}}[/tex]

We know that,

[tex]\dfrac{\dfrac{a}{b}}{\dfrac{c}{d}}=\dfrac{a}{b}\times \dfrac{d}{c}[/tex]

So,

[tex]\dfrac{\dfrac{-3}{8}}{\dfrac{3}{4}}=\dfrac{-3}{8}\times \dfrac{4}{3}\\\\=\dfrac{-1}{2}[/tex]

So, the answer is (-1/2)

Answer:

Cheers

Answer:

an example for applied force is

Explanation:

The applied force is the force applied to the object to either displace it or change its shape.

HOPE THIS HELPS

Answer:

I think its A

Explanation:

if its every 3 seconds wouldnt it be 3.0 Hz

Answer:

D is the answer

Explanation:

Explanation:

Answer:

Efficiency has no physical units  (example   .85 = 85%)

The largest number would be 1 or 100%

An example of efficiency is:  work out/work in

or (work in - work lost to friction) / work in    would be an example of the efficiency of the process

Answer:

F = 144 units

Explanation:

For this exercise we use coulomb's law, for the initial conditions

           F₀ = [tex]k \frac{q_1q_2}{r_o^2}[/tex]

indicate that the force F₀ = 36.0 units and the distance is reduced to r = r₀/2 which is the new force

          F = [tex]k \frac{ q_1q_2 }{(r_o/2)^2}[/tex]

we substitute

          F = 4 [tex]k \frac{q_1q_2}{r_o^2}[/tex]

          F = 4 F₀

we calculate

          F = 4 36

          F = 144 units

The girl's reference frame must be moving with the same speed as the plane.

If an observer is stationary and he watches a car moving he can observe that the car has a momentum and is moving with certain speed. But if the observer is in the car or moving with same speed, the car does not appear to move away form the observer. Likewise, two observers moving with different speed will have different observation about the same car.

Similarly, if the girl describes the plane is not moving that means either she is in the plane or moving with the same speed along with the plane.

Learn more about frame of reference:

https://brainly.com/question/20897534

Answer:

0 J is left (No amount of the original 35000 J energy is left)

Explanation:

From the question

Kinetic Energy (K.E) = 1/2mv²................... Equation 1

Where m = mass of the car, v = velocity of the car.

make m the subject of the equation.

m = 2K.E/v²..................... Equation 2

Given: K.E = 35000 Joules, v = 120 km/h = (120×3600/1000) = 432 m/s

Substitute these values into equation 2

m  = (2×35000)/432²

m = 0.375 kg.

If a brake is suddenly apply,

Then, the velocity of the car = 0 m/s.

Therefore,

K.E = 1/2(0.375×0²)

K.E = 0 J.

From the baove analysis, No amount of the original 35000 J energy is left.

Answer:

G. it enables people to use pots and pans made of metal to cook food

Explanation:

Metals are known to be substances with a relative high melting point, which means that it takes a very high temperature to melt them. As used in this question, copper (Cu) and iron (Fe) at metallic elements that have high melting points.

One advantage of this property based on the options provided is that "it enables people to use pots and pans made of metal to cook food". This is because cooking food requires subjecting them to a constant temperature from a heat source e.g cooker or stove.

The material used to hold the food being cooked must possess a very high melting point to withstand the heat, hence, the importance of these metallic substances. Most pots and pans are made of steel, an alloy of iron, hence, they have high melting point.

Answer:

hmmmmm

Explanation:

I am gonna say D.

if I am right plz give me a brainliest

Answer:

Thx!

Explanation:

Answer:

J = 8 kg-s

Explanation:

Given that,

Force, F = 40 N

Time, t = 0.2 s

We need to find the impulse. We know that,

Impulse, J = F×t

So,

J = 40 × 0.2

J = 8 kg-s

So, the impulse is 8 kg-s.

Answer:

Light is electromagnetic radiation that has properties of waves. The electromagnetic spectrum can be divided into several bands based on the wavelength. As we have discussed before, visible light represents a narrow group of wavelengths between about 380 nm and 730 nm.

OR

The primary properties of visible light are intensity, propagation-direction, frequency or wavelength spectrum and polarization, while its speed in a vacuum, 299 792 458 m/s, is one of the fundamental constants of nature.

Answer:

125 J

Explanation:

Work done = force * distance

work = 25 * 5

work = 125 J

Speed has no direction.

Velocity has one.

Answer:

6km/hr

Explanation:

3km = 30mins

x(km) = 1hr

1hr = 60 x 60 = 3600secs

30min = 30 x 60 = 1800secs

3 x 3,600/x X 1,800

x = 10,800/1,800

x = 6km/hr

To solve the problem we must know about speed, distance, and time.

We know that speed, distance, and time all are in a relationship with each other. this relationship can be given as,

[tex]\rm{Speed = \dfrac{Distance}{Time}[/tex]

Given to us

A student walks 3 km in 30 minutes.

We know distance can be written as the product of speed and time, therefore,

[tex]\rm Distance = \rm speed \times \rm Time[/tex]

Substituting the values we get,

[tex]\rm 3\ km = Speed \times 0.5\ hour[/tex]

[tex]\rm speed = \dfrac{3\ km}{0.5\ hour}[/tex]

speed = 15 km\h

Hence, the speed of the student is 15 km\hour.

Learn more about speed, distance, and time:

https://brainly.com/question/15100898

Answer:

(b) 490 N downwards

Explanation:

(b) Formula : w= mg

m is the mass of the object

g is a gravitational constant (9.8)

w= mg

= 50×9.8

= 490 N downwards

Answer:

Wind

Explanation:

I had this question on one of my tests, and I got it right

The current drawn by a microwave is greater than the amount of current used by an electric bulb, hence the microwave consumes more power.

The amount of energy dissipated by an electrical appliance is the calculated using the following formulas;

P = I²R

where;

The current drawn by a microwave is greater than the amount of current used by an electric bulb, hence the microwave consumes more power.

Learn more about power here: https://brainly.com/question/13881533

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Answer:

True

Explanation:

Answer:

The length traveled by an object moving in any direction or even changing direction is called distance. The location of an object in a frame of reference is called position. For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement

Explanation:

good luck

Answer:

Mechanical

Explanation:

The tank is at rest. And energy of any substance at rest is known as potential energy.

Now, in forms of energy, potential energy is a type of mechanical energy.

Thus, the correct option is mechanical Energy.

Answer:

I'm pretty sure its product.

Explanation:

Hope this helps and have a wonderful day!!!!

Answer:

An ax being used to hit wood (action) and the wood splitting after being hit

by the ax (reaction)

Explanation:

Answer:

d

Explanation: