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trasher [3.6K]
3 years ago
10

This is the material in which a mechanical wave travels.

Physics
2 answers:
Lemur [1.5K]3 years ago
6 0
Medium is the material in which a mechanical wave travels.
n200080 [17]3 years ago
6 0

medium medium  medium

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What did both Newton and Einstein believe directly affects gravity?
4vir4ik [10]
Mass affects gravity
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How would the Earth move if the sun (including its gravity) suddenly disappeared? Explain your answer.
daser333 [38]
It would float outward as all space is expanding from the center constantly. of by some chance it for caught in the orbit of another celestial body with huge mass it may orbit that, bur other wise it would just push outward from the center of the universe theoretically the big bang
5 0
3 years ago
The activation energy of a reaction going on its own is 20 kj. If the reaction was treated with a catalyst, which would most lik
storchak [24]

Answer:

15 kJ

Explanation:

We need to know the following;

what is activation energy?

  • Activation energy is the minimum energy required by reactants for a chemical reaction to take place.

What are catalysts?

  • Catalysts are molecules or substances that speed up the rate of a chemical reaction.
  • In other words, catalysts increase the speed at which products are formed from reactants.

How do catalysts speed up reactions?

  • Catalysts speed the rate of chemical reactions by lowering the activation energy of the reactants.
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  • Therefore, in presence of a catalyst, the new activation energy should be lower than the initial value of activation energy.
7 0
2 years ago
Read 2 more answers
Air at 25°C and 5 atm is throttled by a valve to 1 atm. If the valve is adiabatic and the change in kinetic energy is negligible
Vsevolod [243]

Answer:

T_{2} = 25^{\circ}C

Solution:

As per the question:

Temperature, T_{1} = 25^{\circ}C

Pressure, P_{1} = 5 atm[\tex]Now,We know that the process of throttling occurs in adiabatic conditions where no heat is transferred in between the system and the surrounding, i.e., Q = 0Thus no work is done in this process, i.e., W = 0Enthalpy also remains same from one state to the other state, i.e., [tex]\Delta h = 0

Therefore, from the eqn:

Q - W = \Delta h + \Delta KE

We can write:

\Delta h = h_{1} - h_{2} = 0

\Delta h = C_{p}\Delta T

C_{p}(T_{2} - T_{1}) = 0

Thus

T_{1} = T_{2} = 25^{\circ}C

where

T_{2} = Exit temperature

4 0
2 years ago
A charge of 4.5 × 10-5 C is placed in an electric field with a strength of 2.0 × 104 . If the charge is 0.030 m from the source
ololo11 [35]

Answer:

0.027 J

Explanation:

The formula of the potential energy in electrostatic (U) is

U = q \times E \times d

The values given in the question are

Charge : q = 4.5 \times 10^{-5} C

Electric Field strength : E = 2.0 \times 10^{4} N/C

Distance : d  is 0.030 m

Insert in the formula , will give us

U = 4.5 \times 10^{-5} C \times 2.0 \times 10^{4} N/C \times 0.030 m

Further solving it

U = 0.027 J

Which is the required answer.

Thanks

5 0
2 years ago
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