i need help with this

The mechanical advantage (M.A) of a real

machine is always less than its velocity ratio (V.R.)

because mechanical advantage decreases due to the friction and weight of moving parts of the machine where as the velocity ratio remains constant.

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Answer:

I think it's 18 newtons.

Explanation:

[tex]\qquad\qquad \huge \bf༆ Answer ༄[/tex]

➙ The Correct choice is A

⧠ when two glass marbles bounce off each other, they regain their respective position after collision, since the Loss of energy is minimum, it can be considered as an elastic collision.

Answer:

Explanation:

The question asks "What situations..." and to "Select all the correct answers."

In addition to "two marbles bounce off each other", "a bowling ball knocks over five pins" is another correct answer. The collision between ball and pins is elastic because they are both hard.

Answer:

Conduction is usually faster in certain solids and liquids than in gases. Materials that are good conductors of thermal energy are called thermal conductors. Metals are especially good thermal conductors because they have freely moving electrons that can transfer thermal energy quickly and easily.

Heat transfer by convection happens through the air, and there are millions of minuscule air spaces between the fibers. Heat transfer by radiation is also slow since one fiber must radiate its heat to another.

When we give heat then kinetic energy is increase and this heat is transferred from hot metal to cold metal through this free electrons. As in insulator the free electrons are negligible so that the heat is not transferred from hot junction to cold junction due to absence of this free electrons.

Explanation:

maek me as brainliest

The acceleration of the ball is 0.25 m/s². Therefore option B is correct.

To determine the acceleration of the ball, we can use the equation of motion for objects moving in a straight line with constant acceleration:

[tex]\[ d = ut + \frac{1}{2}at^2 \][/tex]

where d is the distance traveled, u is the initial velocity (which is zero in this case since the ball is released from rest), a is the acceleration, and t is the time.

In this scenario, the distance traveled is 0.5 m, the initial velocity is 0 m/s, and the time taken is 2.0 s. Plugging these values into the equation, we have:

[tex]\[ 0.5 = 0 + \frac{1}{2} \cdot a \cdot (2.0)^2 \][/tex]

Simplifying the equation, we get:

[tex]\[ 0.5 = 2a \][/tex]

Dividing both sides by 2, we find:

[tex]\[ a = 0.25 \, \text{m/s}^2 \][/tex]

Therefore, the acceleration of the ball is 0.25 m/s². The correct answer is B) 0.25 m/s².

Know more about acceleration:

https://brainly.com/question/30660316

#SPJ4

Your question is incomplete, but most probably your full question was,

A student releases a ball from rest on an inclined plane and measures that it travels a distance of 0.5 m in a time of 2.0 s. The acceleration of the ball is

A. 0.125 m/s2.

B. 0.25 m/s2.

C. 0.5 m/s2.

D. 1.0 m/s2.

Question :-

Answer :-

[tex] \rule {180pt} {2pt} [/tex]

Given :-

To Find :-

Solution :-

As per the provided information in the given question, we have been given that the Pressure is 80,000 Pascal . Area is given 0.04 m² . And, we have been asked to calculate the Thrust .

For calculating the Thrust , we will use the Formula :-

Therefore , by Substituting the given values in the above Formula :-

⇒ Thrust = Pressure × Area

⇒ Thrust = 80000 × 0.04

⇒ Thrust = 3200

Hence :-

[tex] \underline {\rule {180pt} {4pt}} [/tex]

Provided that:

To determine:

Solution:

Using concept:

Using formula:

Required Solution:

»»» Pressure = Force/Area

»»» Pressure = Thrust/Area

»»» 80000 = Thrust/0.04

»»» 80000 x 0.04 = Thrust

[tex]brainlyeveryday[/tex]

Apply ohms law

[tex]\\ \rm\Rrightarrow I=\dfrac{V}{R}[/tex]

[tex]\\ \rm\Rrightarrow I=\dfrac{24}{9}[/tex]

[tex]\\ \rm\Rrightarrow I=2.7A[/tex]

FL₁ =Fl₂

80.x₁ = 30.7

x₁=2.625 m

Answer:

Answer:

for seeing small object of low contrast

Explanation:

for example a person who's knitting or sewing would need extra light to see details...

Answer:

800 N

Explanation:

The formula to solve this equation is stress = Force/ Area.

The first step is to rearrange this equation for force: Force = stress * area

The second step is to determine the area: A = pi/4 * d^2

A = pi/4 * (0.0016m)^2=0.00000201 m^2

The third step is to substitute the area back into the equation:

Force = (4 * 10^8)(0.00000201) = 804 N

804 N is approximately 800 N

Answer:

50 m/s²

Explanation:

Givens:

F = 25N horizontally

m = 0.5 kg

a = ?

We are solving for a, so plug in the known values into the formula F = ma

25N = 0.5kg*a

Divide both sides by 0.5kg

(Note that 1N = 1kg*m/s², so when you divide, kg cancels out leaving you with m/s²)

50 m/s² = a

Explanation:

Look at South American and African plates

There is a heavy chance of getting youngest rock

During tornadoes

Answer:

Sonic boom.

When something breaks the sound barrier. (Moves faster than sound, like lighting)

Explanation:

Try flying a plane.

Answer:

1

Explanation:

sound is produced by vibration

Answer:

8 minutes

Explanation:

It take 8 minutes for light to reach us from the sun.

Answer:

I think the answer is B

Explanation:

If the Voltage is halved, then the current goes down as well so the voltage drop across the lamps will decrease as well.