PHYSICS HIGH SCHOOL

Change the following data into scientific notation.

5 000 000 km

Answers

Answer 1
Answer: To find out scientific notation, you want to make sure that number is less than 10. So do 5.000000, you don't rally need the zeros but I just want to make my point. So use 10^x meaning ten the whatever power adds zeros like 5.000000x10^6 meaning it is increasing it by six zeros moving it out of the decimals and letting become 5,000,000. 
Answer 2
Answer:

Answer:

the answer is B) 5x10^6

Explanation:

brainliest please

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A force is applied to a block, causing it to accelerate along a horizontal, frictionless surface. The kinetic energy gained by the block is equal to which of the following​

Answers

Answer:

The work done to the block

See

Workdone is Force×Displacement .

Also work done is total mechanical energy of body

  • As potential energy is 0

Mechanical energy=Kinetic energy

So option C is correct

What is the momentum of a 75.0-kilogram defensive back chasing the fullback at a velocity of 5.00 m/sec.

Answers

Answer : The momentum is, 357 kg.m/s

Explanation :

Momentum : It is defined as the motion of a moving body. Or it is defined as the product of mass of velocity of an object.

Formula of momentum is:

p=mv

where,  

p = momentum

m = mass  = 75.0 kg

v = velocity  = 5.00 m/s

Now put all the given values in the above formula, we get:

p=75.00kg* (5.00m/s)=357kg.m/s

Therefore. the momentum is, 357 kg.m/s


75 kg × 5 m/sec = 375 kgm/s

Hope this helps :)

If an object is NOT accelerating, then one knows for sure that it is ___.A. at rest
B. moving with a constant speed
C. slowing down
D. maintaining a constant velocity

Answers


"Zero acceleration" means "velocity" that's not changing.

Sadly, it seems that both of these words are almost always
misinterpreted and misunderstood. "Acceleration" does NOT
mean "speeding up", and "velocity" does NOT mean speed.

"Velocity" is the speed AND direction of motion.  So, for example,
'30 miles per hour north' and '30 miles per hour west' are the same
speed but different velocities.

"Acceleration" is ANY change in speed OR direction.  Consider three
different families in three different cars.  One car is speeding up, one is
slowing down, and the third is driving around a curve at a steady speed.
ALL three of the cars are accelerating.

Answer:

Zero acceleration means velocity that's not changing.

Explanation:

What terms describes an atom's tendency to hold onto electrons

Answers

It's called Electrophily, or electron affinity.
Insulator 

Insulator tendency to hold onto electrons 

Nuclear fusion occurs in stars.
a. True
b. False

Answers

Answer : The given statement is True.

Explanation -

Nuclear fusion is a thermonuclear reaction in which light stable nuclei combine with each other in order to form a heavy stable nucleus with the release of large amount of energy.

In case of stars, four hydrogen nuclei combine with each other to form a helium nucleus with a release of 26 Mev per cycle.

Thus, nuclear fusion occurs in stars is true statement.


 Stars are powered by nuclear fusion in their cores, mostly converting hydrogen into helium. The production of new elements via nuclear reactions is called nucleosynthesis. A star's mass determines what other type of nucleosynthesis occurs in its core (or during explosive changes in its life cycle). READ THIS AND YOU WILL UNDERSTAND I THINK IS TRUE 

Which statements about velocity are true?Check all that apply.

A. The SI units of velocity are m/s.
B. For velocity, you must have a number, a unit, and a direction.
C. To calculate velocity, divide the change in the distance by time.
D. The symbol for velocity is .

Answers

Answer

A. The SI units of velocity are m/s.

B. For velocity, you must have a number, a unit, and a direction.


Explanation

Velocity is the rate of change of displacement. Velocity unlike speed it is a vector quantity. This means that it has both direction and magnitude. The SI unit of displacement is metres while that of time is seconds. So, the SI units of velocity will be Metres per second. From the choices in the question the statements that are true about velocity are ;

A. The SI units of velocity are m/s.

B. For velocity, you must have a number, a unit, and a direction.

Answer:

A. The SI units of velocity are m/s.

B. For velocity, you must have a number, a unit, and a direction.

C. To calculate velocity, divide the change in the distance by time.

Explanation:

A - SI units for velocity are meters per second. SI (International System) of units is the metric equivalent for units, and m/s are the standard units chosen for velocity under the SI standards.

B - Velocity is a vector, meaning it has magnitude and direction. Because velocity is essentially a speed with direction, it must have units for how fast an object is moving.

C - One method of calculating velocity is distance over time: v = Δ(d/t)

D. Not sure because I'm not seeing a variable here, but the variable for velocity is generally displayed by the letter v
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