3. If you roll a ball up a hill, it undergoes positive<br>acceleration. True or false<br><br>

Left arm has area 10.0 cm2, right has area 5.00 cm2. 100 g of water isadded to right side. a) Determine the length of the water

Masja [62]

Answer:

0.49 cm

Explanation:

We are given that

$A_1=10 cm^2$

$A_2=5 cm^2$

Mass of water,m=100 g

a. $\rho_w=1 g/cm^3$

Volume, $V=\frac{mass}{density}=\frac{100}{1}=100 cm^3$

Length of water column in the right arm= $L=\frac{V}{A_2}=\frac{100}{5}=20 cm$

b. $\rho_m=13.6 g/cm^3$

In equilibrium condition

Pressure at point A=Pressure at point B

$P+\rho_mg(h+h_2)=P+\rho_wgL$

$hA_1=h_2A_2$

$h_2=\frac{hA_1}{A_2}$

$13.6\times 9.8(h+h(\frac{A_1}{A_2}))=1\times 9.8\times 20$

$13.6\times h(\frac{A_2+A_1}{A_2})=20$

$h=\frac{20A_2}{13.6(A_2+A_1)}$

$h=\frac{20\times 5}{13.6\times (10+5)}=0.49 cm$

4 0

4 years ago

1. At which location does the pendulum have the least gravitational potential energy? Why?

Delicious77 [7]

Answer:Point B

Explanation:When it is at the bottom of its swing (arm straight up and down). When it is at its lowest point, Gravity can not pull it down any further. This position also has the most kinetic energy because after it passes the bottom, it goes back up again and loses speed. so when the pendulum is at the bottom it is traveling the fastest it will go.

7 0

3 years ago

Which statement best describes how scientists and engineers work together in the research and development cycle? A. Scientists t

Pavlova-9 [17]

Answer:

c

Explanation:

7 0

4 years ago

Read 2 more answers

List and explain Newton’s Laws of Motion. Give an example for each.

irga5000 [103]

Answer:

If you use the same force to push a truck and a car, the car will have more acceleration than the truck because the car has less mass.

It is easier to push an empty shopping cart than a full one, because the full shopping cart has more mass than the empty one. This means that more force is required to push the shopping cart.

When a person kicks a ball the person exerts force in a specific direction, that is the direction in which it will travel. In addition to this, the stronger the ball is kicked, the stronger the force we put on it and the further away it will travel.

Suppose two people are walking and among the two people, if one is heavier than the other, then the one weighing heavier will walk slower because the acceleration of the person weighing lighter is greater.

When riding a bicycle, the bicycle acts as mass and our leg muscles pushing on the pedals of the bicycle is the force.

Explanation:

8 0

3 years ago

Which of the following types of rocks could contain organic matter?

Wewaii [24]

The type of rock that could contain organic matter is C. Sedimentary. I hope this helps you!!

6 0

4 years ago

3. If you roll a ball up a hill, it undergoes positiveacceleration. True or false​

3. If you roll a ball up a hill, it undergoes positiveacceleration. True or false