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
Georgia [21]
3 years ago
9

An object starts at 11 m/s with an acceleration of 12 m/s? What is its velocity after 4.5 seconds?

Physics
1 answer:
marshall27 [118]3 years ago
5 0

Answer:

65 m/s

Explanation:

v=v0+at <=> v = 11 + 12 t ∧ t = 4.5 s <=> v = 11 + 12×4.5 <=> v = 65 m/s

You might be interested in
Which liquid will evaporate the fastest water salt water pepsi and gatorade?
MArishka [77]
The liquid that will evaporate the quickest would be water. 
<em>~The rest are mixtures, and have more ingrediants in them, therefore the answer should be water. (in which it has no other ingrediants in it but water itself)</em>
6 0
3 years ago
Consider a heat pump that operates on the reversed Carnot cycle with R-134a as the working fluid executed under the saturation d
Schach [20]

Answer:

Work out = 28.27 kJ/kg

Explanation:

For R-134a, from the saturated tables at 800 kPa, we get

h_{fg} = 171.82 kJ/kg

Therefore, at saturation pressure 140 kPa, saturation temperature is

T_{L} = -18.77°C = 254.23 K

At saturation pressure  800 kPa, the saturation temperature is

T_{H} = 31.31°C = 304.31 K

Now heat rejected will be same as enthalpy during vaporization since heat is rejected from saturated vapour state to saturated liquid state.

Thus, q_{reject} = h_{fg} = 171.82 kJ/kg

We know COP of heat pump

COP = \frac{T_{H}}{T_{H}-T_{L}}

        = \frac{304.31}{304.31-254.23}

         = 6.076

Therefore, Work out put, W = \frac{q_{reject}}{COP}

                                              = 171.82 / 6.076

                                              = 28.27 kJ/kg

8 0
4 years ago
What effects occur when heat energy is added to a system
Kobotan [32]
It could possibly melt things
6 0
4 years ago
Which describes an atom that has fewer neutrons than protons and more electrons than protons?
aleksklad [387]

Answer:

negative ion

Explanation:

An atom that has fewer neutrons than protons and more electrons than protons is a negative ion.

The positively charged particles in an atom are the protons

The negatively charged particles in an atom are the electrons.

  The charge an atom carries depends on the balance between the number of protons and electrons in an atom.

  • When the number of protons is more than the number of electrons, the atom is positively charged.
  • When the number of electrons is more than the number of protons, the atom is negatively charged.
7 0
3 years ago
Read 2 more answers
If railroad tracks were built over the boundary of two plates what would happen to the railroad tracks as the plates moved
Oliga [24]
The railroad tracks will move with the plate boundaries
6 0
4 years ago
Other questions:
  • The position of a ball as a function of time is given by
    9·1 answer
  • A wheel rotates without friction about a stationary horizontal axis at the center of the wheel. A constant tangential force equa
    6·1 answer
  • The latent heat of fusion of alcohol is 50 kcal/kg and its melting point is -54oC. It has a specific heat of 0.60 in its liquid
    12·1 answer
  • What are the condition required for reverberation?​
    5·1 answer
  • How is momentum conserved in a system in which two satellites connect?
    11·2 answers
  • Your home energy bill is given in what kind of units?
    8·1 answer
  • Describe an experiment to determine how the frequency of a vibrating string depends on the length of the string
    7·1 answer
  • If all objects have gravitational pulls, why is every object not being constantly accelerated toward every other object?
    5·2 answers
  • Which element accumulates in the environment due to the use of
    10·1 answer
  • You use a rope 2.00 m long to swing a 10 kg weight around your head. The tension in the rope is 20 N. In half a revolution how m
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!