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3 years ago

What is it known as when a force is applied to an object for an amount of time?

Physics

2 answers:

blsea [12.9K]3 years ago

7 0

Answer:

impulse

Explanation:

took the test

maksim [4K]3 years ago

6 0

Answer:

Impulse. Impulse is when a force is applied to an object for an amount of time.

Explanation:

It can't be momentum because momentum is the motion of a moving body, that is measured as a product of its mass and velocity.

It' cant be inertia because inertia is when an object doesn't move/ it does nothing as well as an object remaining unchanged.

And it can't be acceleration because acceleration is when how fast an object can go/ there velocity.

And that leaves us with impulse, so that's the correct one.

Hope this helped!

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The distance between adjacent nodes in a standing wave pattern in a length of string is 25.0 cm:A. What is the wavelength of wav

mina [271]

A) 50 cm

B) 10000 cm/s

Explanation

Step 1

If you know the distance between nodes and antinodes then use this equation:

$\begin{gathered} \frac{\lambda}{2}=D \\ \text{where}\lambda\text{ is the wavelength} \\ D\text{ is the distance betw}een\text{ nodes} \end{gathered}$

then, let

$D=\text{ 25 cm }$

now, replace to find the wavelength

$\begin{gathered} \frac{\lambda}{2}=25 \\ \text{Multiply both sides by 2} \\ \frac{\lambda}{2}\cdot2=25\cdot2 \\ \lambda=50\text{ Cm} \end{gathered}$

so, the wavelength is

A) 50 cm

Step 2

The speed of a wave can be found using the equation

$v=\lambda f$

or velocity = wavelength x frequency,

then,let

$\begin{gathered} \lambda=50\text{ cm} \\ f=200\text{ Hz} \end{gathered}$

replace and evaluate

$\begin{gathered} v=\lambda f \\ v=50\text{ cm }\cdot200\text{ HZ} \\ v=10000\text{ }\frac{\text{cm}}{s} \end{gathered}$

B) 10000 cm/s

I hope this helps you

6 0

1 year ago

At the Six Flags Great America amusement park in Gurnee, Illinois, there is a roller coaster that incorporates some of the lates

Citrus2011 [14]

Given that roller coaster is of tear drop shape

So the speed at the top is given as

v = 11 m/s

acceleration at the top is given as

a = 2.9 g

$a = 2.9(9.8) = 28.42 m/s^2$

now we know the formula of centripetal acceleration as

$a = \frac{v^2}{R}$

$28.42 = \frac{11^2}{R}$

$R = 4.26 m$

PART B)

now if the total mass is given as

m = 2821 kg

now the Net force will be given as

$F = ma$

$F = 2821 \times 28.42 = 80172.8 N$

Now by force equation we will have

$F_n + mg = ma$

$F_n + 2821(9.8) = 80172.8$

$F_n = 52527 N$

PART C)

If the radius of the loop is 14 m

speed is given by same v = 11 m/s

now the acceleration is given as

$a = \frac{v^2}{R}$

$a = \frac{11^2}{14} = 8.6 m/s^2$

PART D)

Now for normal force at the top is given by force equation

$F_n + mg = ma$

$F_n + 2821(9.8) = 2821(8.6)$

so here normal force is coming with negative sign so it will not be possible to complete the circular path in this case

So normal force will be ZERO

8 0

3 years ago

Sound waves travel fastest through

blsea [12.9K]

Answer:

Solids: Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.

Explanation:

3 0

3 years ago

Read 2 more answers

Which scenario describes the damage caused by a tornado?

9966 [12]

The answer is a path of destruction up to 50 miles long with destroyed trees and homes.

Tornadoes form from severe thunderstorms. Wind in the higher altitude of the storm moving at a greater velocity than wind at a lower altitude creates a vertical wind shear. The faster-moving winds aloft come from the west and create an updraft when they meet slower-moving wind close to the ground that is moving in the opposite direction. As warm surface air moves upward into the thundercloud, the rotating air creates a vortex.

The image below shows before and after damage of a tornado.

7 0

4 years ago

Read 2 more answers

BRAINLIESTTT!! HELP ME!!!

likoan [24]

The efficiency of the scissor is 200%.

<u>Explanation:</u>

Efficiency is defined as the ratio of output of any instrument or device or machine to the input supplied to it. So the greater the output the greater will be the efficiency of the device.

As here the work done by us on the system is said to be 10 J so this will be equal to the input work done on the system. And the work done by the system i.e., the scissor is 20 J, so this will be the output work.

So, the efficiency is the ratio of output to input as shown below.

Efficiency = $(\frac {20} {10} ) \times 100$ = 200

So, the efficiency of the scissor is 200%.

6 0

4 years ago