1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lina20 [59]
3 years ago
11

A piece of wood is floating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. I

f the top piece is taken off and placed in the water, what happens to the water level in the tub? Multiple choice: A) It goes up B) it goes down C) it does not change D) cannot be determined from the information given
Physics
1 answer:
Julli [10]3 years ago
7 0

Answer:

D

Explanation:

You might be interested in
A huge tank of glycerine with a density of 1.260 g/cm3 is vertically stationed on a platform which is 15 m above the ground. The
EleoNora [17]

Answer:

The tank is losing 4.976*10^{-4}  m^3/s

v_g = 19.81 \ m/s

Explanation:

According to the Bernoulli’s equation:

P_1 + 1 \frac{1}{2} \rho v_1^2 + \rho gh_1 = P_2 +  \frac{1}{2}  \rho v_2^2 + \rho gh_2

We are being informed that both the tank and the hole is being exposed to air :

∴ P₁ = P₂

Also as the tank is voluminous ; we take the initial volume  v_1 ≅ 0 ;

then v_2 can be determined as:\sqrt{[2g (h_1- h_2)]

h₁ = 5 + 15 = 20 m;

h₂ = 15 m

v_2 = \sqrt{[2*9.81*(20 - 15)]

v_2 = \sqrt{[2*9.81*(5)]

v_2= 9.9 \ m/s  as it leaves the hole at the base.

radius r = d/2  = 4/2 = 2.0 mm

(a) From the law of continuity; its equation can be expressed as:

J = A_1v_2

J = πr²v_2    

J =\pi *(2*10^{-3})^{2}*9.9

J =1.244*10^{-4}  m^3/s

b)

How fast is the water from the hole moving just as it reaches the ground?

In order to determine that; we use the relation of the velocity from the equation of motion which says:

v² = u² + 2gh ₂

v² = 9.9² + 2×9.81×15

v² = 392.31

The velocity of how fast the water from the hole is moving just as it reaches the ground is : v_g = \sqrt{392.31}

v_g = 19.81 \ m/s

4 0
3 years ago
A watt is a measure of power (the rate of energy change) equal to 1 j>s. (a) calculate the number of joules in a kilowatt- ho
GalinKa [24]
Before solving this, you must know the definition of these units of measurement. Watt is a measurement of power which is the amount of energy per unit time in seconds. Energy, on the other hand, is expressed through the SI unit Joules. Thus, power is the amount of energy in Joules per second.

From here, you can use the dimensional analysis technique. Also, you should know that 1 kilowatt is equal to 1000 watts, and 24 hours is equal to 86,400 seconds. Then,

100 = Energy/86,400
Energy = 8,640,000 Joules

4 0
3 years ago
Jamie had a solid, angular crystal and noticed that it was very hard to break. Which model could represent the crystal?
VLD [36.1K]

Answer:

d

Explanation:

5 0
3 years ago
So, like my previous question, how do you solve for 4/5 - 1/2?
ZanzabumX [31]

Answer:

3/10

Explanation:

4/5(2)

-1/2(5)

8/10-5/10

3/10

6 0
3 years ago
Read 2 more answers
Which of the following is an example of an endothermic reaction?
il63 [147K]

Answer:

D, photosynthesis

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the definition of density?​
    8·1 answer
  • During the process of _____, two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.
    11·1 answer
  • Ice causes a crack to form in a rock. This is an example of
    11·1 answer
  • A boy rubs two balloons against his sweater. One balloon acquires a charge of 3.0 E -6 C. The other balloon acquires a charge of
    6·1 answer
  • A sailboat is traveling to the right when a gust of wind causes the boat to accelerate leftward at 2.5​​​​m​​/s2 for 4s. After t
    12·1 answer
  • Answer and mark you as brainliest <br> it's that easy
    7·2 answers
  • Terry is convinced that heating peanut butter will increase its mass so that it covers more bread. Is he correct?
    10·1 answer
  • Which is greater, the mass of the compounds before a chemical reaction or the mass of the compounds after a chemical reaction?
    9·1 answer
  • The water in a river flows uniformly at a constant speed of 2.50 m/s between parallel banks 80.0 m apart. You are to deliver a p
    10·1 answer
  • The force experienced by an electron in a field between parallel plates is proportional to which of the following? Select all th
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!