The diagram below shows a boat moving north in a river at 3m/s while the current in the river moves south at 1 m/s.

How will the boat be affected if it enters a part of the river where the current is moving south at 4 m/s?

Answer:

the answer is D

Explanation:

inertia is movement

Answer:

The astronaut will get a velocity 0.064ms−1 opposite to the direction of the object.

If a 75 kg astronaut floating in space throws a 5 kg rock at 5 m/sec, then the astronaut would move backward with a speed of 0.33 meters/second.

It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.

P = mv

As given in the problem if a 5 kg astronaut floating in space throws a 5 kg rock at 5 m/sec,

By using the conservation of the momentum,

Assuming the initial momentum of the astronaut and ball would have been zero, the total final momentum of the system would be zero as well,

75*v +5*5 = 0

v = 25/75

v = -0.33 m/s

Thus, the astronaut would move backward with a speed of 0.33 meters/second.

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vf = vi + at

vf = 0

a = - (to stop (deceleration))

input the value:

0 = 4 m/s -a.8

8a = 4

a = 0.5 m/s²

F = m.a

F = 75 kg x 0.5 m/s²

F = 37.5 N

Answer:

Capricorn what is yours

Answer:

leo

Explanation:

Substances are composed of atoms, although I'm not sure if this is what you mean

The size of the wavelength of a radio wave is in the order of millions of meters.

Radio wave is part of the electromagnetic spectrum. The radio wave is known to travel across a long distance because it has a long wavelength. This means that it has a low energy.

Hence, the size of the wavelength of a radio wave is in the order of millions of meters.

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Answer: Building

Explanation: took a quiz :)

Answer:

Is called a(n) revolution

Explanation:

Answer:

-2 m/s²

Explanation:

1.96 kg * m2/s2

Explanation:I'm assuming that you are asking what is the elastic potential energy stored in the spring at the position stretched by 16.5 cm...Since you know the spring constant k, 144 N/m and the spring stretch from the equilibrium position x, is 16.5 cm, or 0.165, you find the spring's potential energy from the equation PE = 12kx2, which equals 1.96 Joules, or kg * m2/s2 if you want SI units.

Answer:

B. 170m

Question explained in the photo attached

Hope it helped : )

Answer:

The same

Explanation:

Momentum is conserved before and after collision.

Hope this helps!

Answer:

net force.

Explanation:

Answer:

4.5 billion

Explanation:

There are many stars big and small so there must be billions

[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]

Here's the solution ~

As we know, Displacement =

[tex]\qquad \sf  \dashrightarrow \: velocity \times time[/tex]

[tex]\qquad \sf  \dashrightarrow \: 6.8 \times 250[/tex]

[tex]\qquad \sf  \dashrightarrow \: 1700 \: m[/tex]

[tex]\qquad \sf  \dashrightarrow \: 1.7 \: km[/tex]

The car travelled 1700 meters ( 1.7 km )

Hi there!

1)

Since the charge placed in the middle is positive, we know that the particle is being repelled.

The particle experiences a greater repelling force by the 9μC charge. We can use the equation for electric force:
[tex]F_E = \frac{kq_1q_2}{r^2}[/tex]

k = Coulomb's Constant

q₁, q₂: Charges (C)
r = distance between charges (m)

This is a VECTOR quantity, so we must subtract the forces since they point in opposite directions.

Force from 9μC particle:
[tex]F_E = \frac{k(.000005)(.000009)}{2^2} = .101\\\\[/tex]

Force from 4μC particle:
[tex]F_E = \frac{k(0.000005)(0.000004)}{2^2} = 0.0450[/tex]

Subtract:
[tex].101 - 0.0450 = \boxed{0.561 N}[/tex]

2)

We can find a position by setting the two equations equal to one another. (Both repelling forces must be EQUAL for the force = 0 N)

Let the distance between the 9μC and 5μC charge equal 'x', and the distance between the 4μC and 5μC charge equal '4 - x'.

[tex]\frac{k(0.000009)(0.000005)}{x^2} = \frac{k(0.000004)(0.000005)}{(4 - x)^2}[/tex]

Cancel out 'k' and the 5μC value.

[tex]\frac{0.000009}{x^2} = \frac{0.000004}{(4 - x)^2}[/tex]

Solve for 'x' using a graphing utility.

[tex]\boxed{x = 2.4 m}[/tex]

Answer:

subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass.

Explanation:

A. the moving charge induces a magnet field

B. the energy of the charge pushes on the compass

C. the electrons heat up the wire, causing the compass to deflect

Answer:

It is A that best describe it.

The image that shows the direction someone would need to kick the ball in order to move it toward the goal is image A.

We have,

The arrow in a diagram tells us the direction in which it will go.

Now,

From image A and image B,

Image A tells us that if we kick the ball in the right direction it will hit the goal.

Image B tells us that if we kick the ball in the left direction the ball will not hit the goal but go to the opposite direction.

Thus,

The image that shows the direction someone would need to kick the ball in order to move it toward the goal is image A.

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Answer:

buy what you need to reduce waste, eat organic foods. drive less when transporting try walking instead of using a car or train

Explanation:

Answer:

Centre is the Answer hope its is right and helpfull

Answer:

-80 m/s/s

Explanation:

acceleration = (v final - v initial) / time

a = (0 m/s - 40m/s) / 0.5 seconds

a = - 40 m/s / 0.5 seconds

a = - 80 m/s/s

Answer:

It's easier if you just read the explanation.

Explanation:

about 3.54x1022 N

The gravitational force between the Sun and the Earth is about 3.54x1022 N. This force keeps the Earth orbiting around the Sun.

Answer:

Distance travelled: 20meters

Displacement: 10 meters.

Explanation:

In geometry and mechanics, a displacement is a vector whose length is the shortest distance from the initial to the final position of a point P undergoing motion. It quantifies both the distance and direction of the net or total motion along a straight line from the initial position to the final position of the point trajectory. A displacement may be identified with the translation that maps the initial position to the final position.

Answer:

Dying

Explanation:

I know I am scared

Answer:

The mass of the satellite does not matter, as long as the ratio between the satellite's and the orbited object is small. On the other hand, if the masses are closer to each other, like the Earth and its Moon, then the model is more complicated.

Explanation:

Explain why scientists replace an old scientific model with a new model.

Include an example from Physics in your answer.

A scientific model is created to understand the concepts and explain the reason behind unexplained observations.

But the scientific models cannot explain all the unexplained observations.

When another scientific model which could explain some more observations than the previous model.

This new model replaces the old one.

 One such example in physics is geocentric and heliocentric models.

The geocentric model was based on the principle that all celestial bodies revolve around the earth as its center.

But this model failed to explain some planets move backward instead of forward.

The heliocentric model was based on the principle that all planets revolve around the sun as its center including earth.

 This model was able to resolve the backward and forward motion dilemma.

That is why heliocentric replaced the geocentric model.

[tex]\boxed{\huge \text{Hope this helps! :)}}[/tex]

[tex]\huge \text{Happy president's day! :)}[/tex]

-InLoveWithNature-

The model was used by scientists to predict the results of their investigations. The data frequently did not support their forecasts. This required a modification to the model.

The contemporary atomic model emerged as a result of numerous scientists building on one another's research.

Creating a physical, mental, or mathematical model of a genuine occurrence that is challenging to see firsthand is known as scientific modeling.

In a range of scientific disciplines, from chemistry and science to ecology and also the Earth sciences, scientific models are employed to explain and forecast the behavior of real things or systems.

Though modeling is an essential part of contemporary science, scientific models are, at best, approximations rather than perfect representations of the systems and things they represent. As a result, scientists are always trying to enhance and improve models.

Scientific modeling has a variety of goals. Some models, which are frequently developed from experimental data, are being used mainly to visualize an object or system, such the three-dimensional dbl model of DNA.

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