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
Anna007 [38]
3 years ago
14

3. A 0.98 kg rock is attached to a 0.40-m rope and spun in a vertical

Physics
1 answer:
diamong [38]3 years ago
3 0

Answer: v = 6.0 m/s

Explanation:

T = m(v²/R - g)

(T/m + g)R = v²

v = √((79.0/0.98 + 9.81)0.40) = 6.0140... ≈ 6.0 m/s

You might be interested in
Light years are smaller in distance than astronomical units
elena55 [62]
That's false. It's the other way around. One light year is a distance that's a little farther than 63,000 astronomical units.
4 0
3 years ago
Read 2 more answers
What causes the phases of our moon
Helga [31]

sunlight, and the position of the earth

4 0
4 years ago
Differentiate between:<br><br>a. Compression and Rarefaction<br>​
zlopas [31]

Answer:

Explanation:

Compression

The region in a medium where the distance between the vibrating molecules is minimum is compression.

This is the region with higher air pressure than the surrounding .

Rarefaction

The region in a medium where the distance between the vibrating molecules is maximum is rarefaction.

This is the region with relatively low air pressure.

hope it helps :)

7 0
3 years ago
2. Predict what will happen if the 80 kg adult was further from the pivot (more right) and explain your reasoning. 3. Predict wh
Alika [10]

Answer:

2) τ = F x  torque increases, 3) troque decreases,

4)  man approaches the pivot and the child must move away

5)  Σ τ = 0

Explanation:

2) when the man moves away from the pivot his torque increases significantly, since his distance increases

                 τ = F x

                 τ = m g x

therefore the system rotates faster

3) when the child approaches the pivot, his troque decreases, because the distance decreases

                 τ = f x

therefore the system must spin slower

4) If we place the man and the child on the side of a scale, the movement must be the man approaches the pivot and the child must move away, so that the torque is the same and the system can reach a balance

5) the rotational equilibrium expression

                 Σ τ = 0

is the one that describes the equilibrium of a system with several forces

8 0
3 years ago
The thermal conductivity of a cement is 0.168 British thermal units per foot hour degree Fahrenheit ​[BTU divided by (ft h Super
Sliva [168]

Answer:

thermal conductivity =  0.2906 W/m.K

Explanation:

thermal conductivity = 0.168 BTU/h.ft⁰F

1 BTU/h.ft⁰F = 1.7295772056 W/m.k

0.168 BTU/h.ft⁰F = 0.168 * 1.7295772056 W/m.k

0.168 BTU/h.ft⁰F = 0.2906 W/m.k

5 0
4 years ago
Other questions:
  • Foods that allow microorganisms to grow are called parasites. true or false
    10·1 answer
  • The MAIN function of political parties in the United States is to
    11·1 answer
  • A wheel with radius 0.487 m rotates 5.75 times every second. find the period of this motion.
    5·1 answer
  • The number density of gas atoms at a certain location in the space above our planet is about 1.05 × 1011 m-3, and the pressure i
    14·1 answer
  • Use Newton's universal law of gravitation to explain why gravity is greater on Earth than on Mercury.
    5·1 answer
  • A mixture of nitrogen and water vapor at 200oF, 1 atm has the molar analysis of 80% N2, 20% water vapor.a) If the mixture is coo
    8·1 answer
  • HELP ASAP PLEASE!!!
    6·2 answers
  • Maria makes a graphic organizer to compare open, closed, and short circuits. She adds the labels shown.
    11·2 answers
  • 9 10
    13·1 answer
  • Need help on this question ASAP pleasee (:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!