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
Dominik [7]
3 years ago
5

1. Define physical quantities.

Physics
1 answer:
abruzzese [7]3 years ago
8 0

my old profile,i just take my points back

You might be interested in
What happens to the frequency and pitch of sound if the object making the sound moves away from you ?
Olin [163]

If you and the source of sound are moving apart, then the pitch (frequency) <em>you hear</em> is <em>lower</em> than the pitch (frequency) that's actually leaving the source.  

It doesn't matter whether you or the source is the one moving, only that the distance between you is increasing.

8 0
3 years ago
How far did the object travel from time = 0 to time =15 s 120 m. 180 m 90 m 45 m
sineoko [7]

Answer:Position is an object’s location in relation to a reference point.

Yes. As in the movie theater example, an object can be one unit positive from the reference point and a different object can be one unit negative from the reference point. Both objects are one unit away (the same distance), but they occupy different locations in space because they are in different directions.

Distance is the total amount an object has traveled, while displacement is the shortest distance between the object’s starting and finishing point.

Distance does not have direction. Objects can be one unit away from a point in every direction. However, displacement does have a direction. Displacement is defined as a specific distance in a specific direction.

Explanation: hope it helped

6 0
3 years ago
A 1000 kg car and a 1500 kg car are driving in opposite directions at 20 m/s and 10 m/s respectively. If the cars collide head-o
sineoko [7]

Hi there!

Recall the conservation of momentum for an inelastic collision:

\large\boxed{m_1v_1 + m_2v_2 = (m_1 + m_2)v_f}}

Remember, velocity is a VECTOR and direction must be accounted for. Let the 1000 kg car have a positive velocity and the 1500 kg car have a negative velocity (opposite direction).

Plug in the given values:

(1000)(20) + (1500)(-10) = (1000 + 1500)v_f}}

Solve:

20000 -15000 = 2500v_f}}\\\\5000 = 2500v_f\\\\v_f =\boxed{ 2 m/s}

8 0
3 years ago
A student working in the physics laboratory connects a parallel-plate capacitor to a battery, so that the potential difference b
Vedmedyk [2.9K]

Answer:

a)  Q₀ = Q = 4.27 10² pC,  b) C = 1.26 10⁻¹⁰ F,  ΔV = 3.375 V, c) ΔE = 56.88  nJ

Explanation:

a) the capacitance of a parallel plate capacitor is

        C = ε₀ A / d

let's reduce the magnitudes to the SI system

        d = 1.40 cm = 0.0140 m

        A = 25.0 cm² (1 m / 100 cm) ² = 25.0 10⁻⁴ m²

         C = 8.85 10⁻¹² 25.0 10⁻⁴ / 0.0140

         C = 1.58 10⁻¹² F

the capacitance is also

          C = Q / ΔV

          Q = V ΔV

          Q = 270  1.58 10⁻¹²

          Q = 4.27 10⁻¹⁰ C

When the battery is removed and the capacitor is inserted into the dielectric, the charge should remain the same,

           Q₀ = Q = 4.27 10⁻¹⁰ C

let's reduce to pC

           Q₀ = 4.27 10⁻¹⁰ C (10¹² pC / 1C)

           Q₀ = Q = 4.27 10² pC

b) After being immersed in the fluid of constant k = 80.0

capacitance is

            C = k Co

            C = 80 1.58 10⁻¹²

            C = 1.26 10⁻¹⁰ F

the voltage difference is

            ΔV = ΔV₀ / k

            ΔV = 270/80

            ΔV = 3.375 V

c) We stop the energy before the dive

             E₀ = ½ C₀ ΔV₀²

after the dive

              E = ½ (k C₀) (ΔV₀/k)²

              E = ½ C₀ ΔV₀² / k

              E = E₀ / k

               

the change in energy is

            ΔE = E -E₀

            ΔE = E₀ / k - E₀

            ΔE = E₀ ( \frac{1}{k} - 1 )

we calculate

             E₀ = ½ 1.58 10⁻¹² 270²

             E₀ = 5.76 10⁻⁸ J

             ΔE = 5.76 10⁻⁸ (\frac{1}{80} -1)

             ΔE = 5.688 10⁻⁸ J

we reduce to nJ

             ΔE = 5.688 10⁻⁸ J (10⁹ nJ / 1J)

             ΔE = 56.88  nJ

8 0
3 years ago
6) Calculate the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g.
weqwewe [10]

Note:  65.14 g is a mass, not a weight.

Density = (mass) / (volume)

Density = (65.14 g) / (35.4 mL)

Density = (65.14/35.4)  g/mL

<em>Density = 1.84 g/mL </em>

3 0
3 years ago
Read 2 more answers
Other questions:
  • According to Newton's first law of motion, what will an object in motion do when no external force acts on it?
    15·2 answers
  • A meter stick is balanced at the 50 cm mark. You tie 70 N weight at the 30 cm mark. What weight at the 90 cm mark would create a
    15·1 answer
  • Which of the following most accurately represents John Dalton’s model of the atom? A. a tiny, solid sphere with an unpredictable
    5·1 answer
  • Which of the following states Bernoulli’s principle?
    9·1 answer
  • A ball is dropped , find the velocity after 100 m
    10·1 answer
  • Increasing the mass attached to a spring will decrease the angular frequency of its vibrations. True or False
    9·1 answer
  • The ratio of carbon-14 to nitrogen-14 in an artifact is 1:7. Given that the half-
    11·1 answer
  • A forward horizontal force of 50 N is applied to crate a second horizontal force of 180 N is applied to crate in the opposite di
    9·1 answer
  • How does an objects size affect the gravity exerted by that object​
    5·1 answer
  • When dolphin swims close to its prey, it transmits sound waves to figure out details (like direction where the fish is moving) o
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!