A foil boat measures 4.0cm by 5.0cm and has a mass of 100.0g. If you put the boat in water, how far will it sink? (Recall the density of water is 1.0 g/mL) (answer with a number; units are cm)

Answer:

Let the volume of the block of wood be

V

c

m

3

and its density be

d

w

g

c

m

−

3

So the weight of the block

=

V

d

w

g

dyne, where g is the acceleration due to gravity

=

980

c

m

s

−

2

The block floats in liquid of density

0.8

g

c

m

−

3

with

1

4

t

h

of its volume submerged.So the upward buoyant force acting on the block is the weight of displaced liquid

=

1

4

V

×

0.8

×

g

dyne.

Hence by cindition of floatation

V

×

d

w

×

g

=

1

4

×

V

×

0.8

×

g

⇒

d

w

=

0.2

g

c

m

-3

,

Now let the density of oil be

d

o

g

c

m

-3

The block floats in oil with 60% of its volume submerged.So the buoyant force balancing the weight of the block is the weight of displaced oil =

60

%

×

V

×

d

o

×

g

dyne

Now applying the condition of floatation we get

60

%

×

V

×

d

o

×

g

=

V

×

d

w

×

g

⇒

60

100

×

V

×

d

o

×

g

=

V

×

0.2

×

g

⇒

d

o

=

0.2

×

10

6

=

1

3

=

0.33

g

c

m

−

3

Explanation:

A soft lump of clay has water run on top of it. Most of the water and clay runs off the table. After a long while, the water is turned off and allowed to dry. There is no clay left; instead, there are small pebbles and other types of components left on the table.
Which natural process is this modeling?

A. physical weathering

B. deposition

C. erosion

D. chemical weathering

Which statement best describes the relationship between the sun and moon during a spring tide?

The sun and the moon are aligned.

The sun and the moon are revolving around the Earth at the same speed.

The sun and the moon are at 45° angles to each other.

The sun and the moon are at 90° angles to each other.

As the of the force of the shot increased, ___ ?
the puck traveled ?
This is because a force leads to a bigger change in an object's motion ___ ?
Friction had the effect on the puck's movement ?
as the friction force increased, the puck traveled ?
This is because friction works in the direction as an object is moving ?

Can someone help with this?
--
I don't understand what to do for this part

help with science question

Explain the water cycle in your own words. make sure u tell the steps in order

i need help w this..
A pneumonic device is a memorization tool that helps you remember things. For example, if you can read music you probably have heard, “Every Good Boy Does Fine” to learn the names of the lines on the treble clef EGBDF. Or maybe your math teacher taught you, “Please Excuse My Dear Aunt Sally,” to help you remember the order of operations. It is now your turn to think of a pneumonic device to remember the water cycle in order. Write your pneumonic device below.

To calculate acceleration you must
Select one:

multiply the force and mass

add the force and mass

divide the mass by the force

divide the force by the mass

HELP PLEASE AND QUICK!!!!!!!!!!!!!!!!!!!

Make a prediction for what science and technology may uncover in the next few decades.

Choose all that apply for Grasslands

Select 3 correct answer(s)
Question 2 options:

Contains grasses and woody plants


occur in all climatic zones


rainfall is low


no trees and shrubs

Explain why a food web is a better illustration of an ecosystem]= than a food chain

the figure shows the great ocean conveyor belt. which best describes what this model represents?

A. The model shows how ocean currents change the salinity of water.

B. the model shows how ocean currents move heat energy around earth

C. the model shows how salinity of water affects its density

D. the model shows how the density of water differs between the north Atlantic and other parts of the ocean.

Please help!!
What do scientists do when they want to name a new organism?
all of the above
They see how the organism is similar to other organisms.
They see if the organism has the characteristics of an animal or plant.
They look at what makes the organism unique.

Think of at least 10 things you can do to help preserve our freshwater or to clean up our polluted water

when salt dissolves into water does it change its state

How do the data support your claim above?
Explain your statement above. Be sure to refer to specific pieces of data from your experiment that support your argument.

Which of these shows the common stages of growth for a flowering plant?
leaves, seed, shoot, root system, stem or trunk, flowers
stem or trunk, root system, seed, shoot, leaves, flowers
seed, shoot, root system, stem or trunk, leaves, flowers
flower, seed, shoot, stem or trunk, root system, leaves