If you were to throw flour on the man in the photo, the flour would stick to the man's chest everywhere but on his scar. Why?

Answers

Answer 1

Answer:

Explanation:

Flour typically sticks to surfaces due to adhesive forces, and it's more likely to stick to areas with moisture or oils on the skin. If the scar on the man's chest lacks moisture or oils (which is common for scars), the flour may have difficulty adhering to that specific area. However, it could stick to the surrounding skin where there might be more moisture or natural oils.

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Objects that are closer together have a stronger force of gravity between them.True
False

Answers

I think it's true because the force gets stronger as the two objects move closer together.

Is adding sugar to lemonade a chemical or physical change

Answers

physical.. think of it as a person putting on weight.. adding weight, but still a person. adding sugar, but still lemonade.

That's a physical change since nothing's really happening except for the flavor. Only the flavor changed cause you added something, but it's not a chemical

What unit of length is used to express the size of stars?

Answers

The size (radius, diameter) of stars is typically described
in terms of miles or kilometers.

The mass and volume of stars are described in kilograms and
cubic meters respectively, with scientific notation for the huge numbers.

Because the distances to stars are so large, it is useful to introduce some large ... The Light Year Distance Unit ... of 3 x 1010 cm/s in a vacuum, we can determine the length of a light year in centimeters

The momentum of a bald eagle in flight is calculated to be 345. The mass of the eagle is 5.0 kg. What is the magnitude of the velocity of the eagle?

Answers

Answer : v = 69 m/s.

Explanation :

It is given that,

The momentum of a bald eagle in flight, $p = 345\ Kgm/s$

Mass of the eagle, m = 5 kg

We know that the momentum of any object is defined as the product of mass and the velocity with which it is moving.

$p=mv$

$v=(p)/(m)$

$v=(345\ kgm/s)/(5\ kg)$

$v=69\ m/s$

The velocity of the eagle is 69 m/s.

Hence, this is the required solution.

The formula to find the magnitude of velocity is:

▲v= ▲M/m

▲v=Velocity Change
▲M=Momentum Change
m=Mass

Plug in the information;

▲v=345/5

The answer is 69

A 30 N rock falls from a 40 m cliff. At what point during its fall are itspotential and kinetic energies equal?

Answers

Answer:

Both energies are equal when the rock has fallen 20 m or equivalently when it is at a height of 20 m.

Explanation:

Potential and Kinetic Energy

The gravitational potential energy is the energy an object has due to its height above the ground. The formula is

$U=mgh$

Where:

m = mass of the object

g = acceleration of gravity (9.8~m/s^2)

h = height

Note we can also use the object's weight W=mg into the formula:

$U=Wh$

The kinetic energy is the energy an object has due to its speed:

$\displaystyle K=(1)/(2)mv^2$

Where v is the object's speed.

Initially, the object has no kinetic energy because it's assumed at rest.

The W=30 N rock falls from a height of h=40 m, thus:

$U=30*40=1,200 J$

Since the sum of the kinetic and potential energies is constant:

U' + K' = 1,200 J

Here, U' and K' are the energies at any point of the motion. Since both must be the same:

U' = K' = 600 J

U'=Wh'=600

Solving for h':

$\displaystyle h'=(600)/(W)=(600)/(30)=20~m$

Both energies are equal when the rock has fallen 20 m or equivalently when it is at a height of 20 m.

A light goes on immediately when you flip a switch because.A. conductors allow electrons to travel extremely quickly from the power source to the light

B. tightly bound electrons are already present in the conductors that make up the circuit

C. loosely bound electrons are already present in the wire conductors that make up the circuit

Answers

Answer:

I'm pretty sure it is A hope that helps

Explanation:

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