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
GrogVix [38]
3 years ago
14

Two engineering appliances which uses friction​

Physics
1 answer:
Yanka [14]3 years ago
5 0

Answer: gears and brakes cause friction

You might be interested in
Block A, with a mass of 4 kg, is moving with a speed of 2 m/s while Block B, with a mass of 8.4 kg, is moving in the opposite di
dybincka [34]

Answer:

The center of mass move with the velocity of -3.487 m/s.

Explanation:

Given values of block A.

Mass of block A, (M1) = 4 kg

Speed of block A, (V1) = 2 m/s

Given values of block B.

 Mass of block B, (M2) = 8.4 kg

Speed of block B, (V2) = -6.1 m/s

Below is the formula to find the velocity of center of mass.

Velocity = \frac{M1V1 + M2V2}{M1 + M2} \\

= \frac{4 \times 2 + 8.4 \times (-6.1) }{4 + 8.4} \\

= \frac{- 43.24}{12.4}\\

= - 3.487 m/s

7 0
3 years ago
2. Another airplane is flying in the opposite direction. It covers the same
Korolek [52]

Answer:300

Explanation:

6 0
4 years ago
Explain in two or three sentences how we can know what an object is made out of by looking at the light it gives off?
DaniilM [7]

Answer:

The act of 'seeing' an object is the result of light from any luminous source e.g. the Sun, a glowing candle or a torch, radiating outwardly from the source until it strikes the object and is reflected to travel to the observer's eyes where if it retains sufficient intensity it will form an image on the retina. i hope this helps

5 0
3 years ago
What is the numerical value for standard atmospheric pressure?
Romashka-Z-Leto [24]

Answer: The standard constant value used for atmospheric pressure at sea level is 1 atm (standard atmosphere) which equals 101325 pascals in SI units, and is equivalent to 29.9213 inches of mercury.

8 0
3 years ago
A. What is the RMS speed of Helium atoms when the temperature of the Helium gas is 343.0 K? (Possibly useful constants: the atom
kkurt [141]

Answer:

(a) 1462.38 m/s

(b) 2068.13 m/s

Explanation:

(a)

The Kinetic energy of the atom can be given as:

K.E = (3/2)KT

where,

K = Boltzman's Constant = 1.38 x 10⁻²³ J/k

K.E = Kinetic Energy of atoms = 343 K

T = absolute temperature of atoms

The K.E is also given as:

K.E = (1/2)mv²

Comparing both equations:

(1/2)mv² = (3/2)KT

v² = 3KT/m

v = √[3KT/m]

where,

m = mass of Helium = (4 A.M.U)(1.66 X 10⁻²⁷ kg/ A.M.U) = 6.64 x 10⁻²⁷ kg

v = RMS Speed of Helium Atoms = ?

Therefore,

v = √[(3)(1.38 x 10⁻²³ J/K)(343 K)/(6.64 x 10⁻²⁷ kg)]

<u>v = 1462.38 m/s</u>

(b)

For double temperature:

T = 2 x 343 K = 686 K

all other data remains same:

v = √[(3)(1.38 x 10⁻²³ J/K)(686 K)/(6.64 x 10⁻²⁷ kg)]

<u>v = 2068.13 m/s</u>

8 0
3 years ago
Other questions:
  • The following is an example of which type of reaction?<br> CH3OH + O2 → CO2 + 2H2O + heat
    8·1 answer
  • Which type of intermolecular attractive force operates between all molecules?
    10·1 answer
  • Lindsey throws a hard rubber ball against a wall. Describe the forces that act on the ball when it hits the wall and how the for
    14·2 answers
  • Someone help me plzzzzzz thankss!!
    9·1 answer
  • Which statements describe characteristics of most metals? Check all that apply.
    5·2 answers
  • Can someone please help me answer these questions
    6·1 answer
  • Excess use of fossil fuel causes energy crisis.​
    6·2 answers
  • Would u rather/ get ur dream car or live in a van and never pay taxes
    11·1 answer
  • Determine the elastic energy U stored in<br> the compressed spring.
    9·1 answer
  • The crystal in a digital watch oscillates at a rate of 215 Hz. If the maximum displacement of one crystal face (measured from on
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!