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
Rufina [12.5K]
2 years ago
5

1. A pendulum is 0.25 m long. What is the frequency of its oscillations? How do you solve this

Physics
1 answer:
lidiya [134]2 years ago
4 0

Answer:

hi

Explanation:

hi

You might be interested in
Two 6 ohm resistors in parallel gives an equivalent resistance of
Mashcka [7]

Answer:

3 ohms

Explanation:

6×6/6+6 =3 .............

3 0
3 years ago
When hydrogen is burned in the presence of oxygen it will form water as per the equation: 2h2
Natasha_Volkova [10]

Answer:

B. In the first case, a combination reaction takes place and in the second case, a decomposition reaction takes place.

Explanation:

When hydrogen burns in oxygen, water is formed and when water is electrolysed then hydrogen and oxygen are produced. What type of a reaction takes place?

(i) In the first case,

(ii) In the second case?

A. In both the cases, i.e. (i) and (ii), a combination reaction takes place.

B. In the first case, a combination reaction takes place and in the second case, a decomposition reaction takes place.

C. In the first case, a combination reaction takes place and in the second case, a displacement reaction takes place.

D. In the first case, a displacement reaction takes place and in the second case, a decomposition reaction takes place.

Answer :

Hint: When hydrogen burns in air, H2H2 reacts with O2O2 to form water molecules. Here two reactants combine to form a single product. And, when water is electrolysed into hydrogen and oxygen, here a single compound decomposes into more than one product.

Complete step by step answer:

In the First case:

When hydrogen burns in oxygen, water is formed.

Hydrogen + Oxygen = Water

2H2+O2→2H2O2H2+O2→2H2O

When two reactants elements combine to form a single component, then this reaction is called the combination reaction. So, in this case, two reactants i.e. Hydrogen and oxygen combine to form a single product i.e. water molecules and heat is also released.

In the Second case:

When water is electrolysed then hydrogen and oxygen are produced.

2H2O→2H2+O22H2O→2H2+O2

When a single reactant is decomposed or broken down into two or more products, it is known as decomposition reaction. Here, a single reactant i.e. water, breaks or decomposes up to form two or more simple products i.e. hydrogen and oxygen. This decomposition reaction takes place by the action of electricity. So, we can see that in the first case, a combination reaction takes place and in the second case, a decomposition reaction takes place.

Therefore, the correct answer is option (B).

Note: Hydrogen is combustible and it burns with a popping sound in oxygen with an almost colourless flame to form water molecules and release heat. This reaction is highly exothermic. Hydrogen must be handled very carefully as the mixture of hydrogen and oxygen can be explosive when two are present in a particular ratio.

7 0
2 years ago
A motor uses motion in a magnetic field to produce an electric current. true or false
irinina [24]

Well, that's a nice, concise description, but it applies to a
generator, not a motor.  A motor does exactly the opposite.
It uses an electric current to produce motion in a magnetic field.

Sadly, the statement is false.

5 0
3 years ago
Calculate the acceleration of a car that begins at rest at a stop light and accelerates to a speed of 20m/s in a 10 sec time per
Dominik [7]
A = delta v over delta t delta v is calculated with final velocity less initial velocity then delta v is equals to 20 - 0 that is 20m/s and to calculate delta t is like delta v is final time less initial time as initial time always is 0 the delta t is equals to 10s then a = 20/10 then acceleration is 10m/s^2 (remember that is squared)
5 0
3 years ago
Identify the two atmospheric layers that contain air as warm as 25◦ C
BigorU [14]

Answer:

troposphere and stratosphere

4 0
2 years ago
Other questions:
  • Tiana jogs 1.5 km along a straight path and then turns and jogs 2.4 km in the opposite direction. She then turns back and jogs 0
    11·1 answer
  • Which types of orbitals are found in the principal energy level n = 3?
    11·2 answers
  • 1. when a homemade oil and vinegar salad dressing is left standing, it separates into layers. the salad dressing is a? solution,
    15·1 answer
  • The climber dropped her compass at the end of her 240-meter climb. How long did it take to strike bottom?
    12·2 answers
  • Please help me to solve this and give me the summary of answer
    9·1 answer
  • Using the periodic table, predict the formulas of stable ionic compounds. Select THREE that are correct.
    13·2 answers
  • STATE THE LAWS OF CONSERVATION OF MOMENTUM​
    14·1 answer
  • Calculate the accleration of a car if its velocity increases from 15m/s to 75m/s in 5 second​
    6·1 answer
  • A skater is spinning with his arms outstretched. He has a 2 lb weight in each hand. In an attempt to change his angular velocity
    11·1 answer
  • How is power defined? Question 4 options: the quantity of work accomplished the direction of the work the total distance an obje
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!