PHYSICS HIGH SCHOOL

A dolphin swims 1.85 km/h. How far has the dolphin traveled after .60 h?

Answers

Answer 1
Answer: 1.85 km every hour x 0.60 hours

1.85 x 0.6 = 1.11


The dolphin traveled 1.11 km.

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Speed of wave can change ifA) none of the other choices B) pressure changes C) temp changesD) all the other choices E)enters new medium
An atom of carbon (C) forms covalent bonds with two atoms of oxygen (O) to form carbon dioxide. How are the valence electrons of these atoms rearranged to form the bonds?A. Electrons are transferred from the carbon atom to the oxygen atoms. B. Electrons are transferred from the oxygen atoms to the carbon atoms. C. Many valence electrons are shared between the atoms. D. A few valence electrons are shared between the atoms
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A physical change occurs when a material changes shape or size but the composition of the material does not change. True or False?

Answers

It is true that a physical change occurs when a material changes shape or size, but the composition of the material does not change. The correct answer is True. 

The force between two magnetic poles will increase as their separation is increased. true or false?

Answers

False, because the force between two charged objects decreases as distance between them increases, as per the universal magnetic force law: 

F = kq1q2 / r^2, where F is the force, r is the distance between the objects, k is the universal magnetic constant, and q1 and q2 are the unit charge per unit mass values, 

A tropical storm turns into a hurricane when wind speeds reach?

Answers

A tropical storm turns into a hurricane when wind speeds reach more than 33 knots. It happens when the tropical depression strengthens and then the speed of the wind starts increasing and reaches a stage when it is called a hurricane. Right type of condition can create a powerful hurricane, but when the right conditions are not there, then the storm fizzles out. 

Answer:

74mph

Explanation:

the internet

While discussing the effects of loose wheel bearings: Technician A says that vibration may occur while driving. Technician B says that the bearing may make noise. Who is correct? a. Technician A b. Neither A nor B c. Technician B d. Both A and B

Answers

Answer:

Option "D" is the correct answer i.e. Both Technicians A & B

Explanation:

Dear,

Loose wheel bearings can be caused on any machine.

The Following can be the reasons :

  • the machine or motor is installed improperly
  • the rotor(rotating part) of machine is not balanced
  • the cover get deteriorated with time
  • Bad manufacturer

So, when the bearings will be loose then the following can happen:

  1. It will produce vibration in machine which can be judged by a vibration pen eg. SKF vibration pen
  2. The vibration will also result in noise. You can check by
  3. The machine winding if it is motor will burn-out.
  4. Bush needs to be installed if the bearing runs loose.

Therefore,  "D" is right.

Force of attraction between the Earth(m=5.98x10^24) and a 70 kg student. distance of 6.38x10^6

Answers

F=G(m₁m₂/r²)
= 9.81(70*5.98x10²⁴/6.38x10⁶)
=9.81(6.56x10³¹)
=6.44x10³²

Each step in any energy conversion process will _____. gain energy create energy dissipate energy destroy energy

Answers

The correct answer is to dissipate energy. Each step in any energy conversion process will dissipate energy. The energy conversion is the process in which a form of energy is being converted into a new or another form of energy.

The correct answer to the question is : Energy dissipate.

EXPLANATION:

Before coming into any conclusion, first we have to understand law of conservation of energy.

As per law of conservation of energy, energy can neither be created nor be destroyed. It can only change from one form to another form, and the total energy of the universe is always constant.

As per the question, there is energy conversion. One form of any energy may be converted into various types of energy. One particular type of energy is not obtained always.

Hence, the correct answer to the question is energy is dissipated during energy conversion.
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