PHYSICS MIDDLE SCHOOL

Jenna ran around the school's track with an average speed of 4km/ h How Can Jill get a higher average speed than jenna

Answers

Answer 1

Answer:

A She can run the same distance in a shorter amount of time.

Explanation:

Jill can achieve a higher average speed than Jenna if she runs the same distance in a shorter amount of time.

Speed is a physical quantity that deals with the rate of change of distance with time:

Speed = $(Distance traveled)/(time taken)$

The distance traveled is the length of the path covered and time taken is the duration.

To achieve a higher speed, it would be desired to have a lower time and the distance covered steadily increasing or staying the same.

To achieve a low speed, the distance must be decreasing and time increasing.

Learn more:

Speed brainly.com/question/10435836

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What did Mendel discover about genetic factors in pea plants

Answers

Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits. For instance, In a Punnett Square, which shows the predicted results of a breeding, it's easy to see why.
T --- t
T TT Tt
t Tt tt
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True or false? Pluto is less than 2/3 the size of Earth's moon?

Answers

Pluto has 66% of the diameter of the Earth's moon and 18% of its mass.

So your answer is true

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This is a math problem. To solve this we create a ratio of the radius of Pluto to the Moon.

$(737)/(1079)$ showing that Pluto is about 68% the size of the moon. You asked if Pluto was less than $(2)/(3)$ or 66%, or less the size of the moon.

68>66 so the answer is False if you are talking about the volume or size of the two.

If you are talking about density, the ratio would be:

$(1.88)/(3.34)$ which equals 56% so the answer would be True if you are inquiring about density.

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True or false, most waves are generated by vibrations

Answers

Answer:

true

Explanation:

Answer:

This answer is True

A helicopter’s speed increases from 30 m/s to 40 m/s in 5 seconds. What is the acceleration of this helicopter? m/s2

Answers

Answer:

The acceleration of this helicopter is $2 m/s2$

Explanation:

In this question the velocity changes from 30 m/sto 40 m/s in 5 seconds.

Initial velocity u= $30m/s$

Final velocity u= $40m/s$

Time t= $5s$

Acceleration is defined as the rate of change of velocity. It is given by the equation

$a= (v-u)/(t)$

= $(40-30)/(5)$

= $(10)/(5)$

= $2 m/s2$

All moving bodies aren’t necessarily accelerated. To be identified as accelerating, a body should have its velocity changing. Thus a body in uniform motion is not accelerating since its velocity is constant.

Answer:

A helicopter’s speed increases from 30 m/s to 40 m/s in 5 seconds.

What is the acceleration of this helicopter?

m/s2

Explanation:

Correct on egde

What type of rock forms when rocks melt, cool, and then harden?Igneous
Metamorphic
Shale
Sedimentary

Answers

Igneous rocks form when melted

Igneous rocks (1st option) are formed when the rocks melt, cool & then harden. Their formation takes place over a long period of time.

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RainbowSalt2222 ☔

A train moving with a velocity of 87.1 km/hour North, increases its speed with a uniform acceleration of 0.250 m/s2 North until it reaches a velocity of 160.0 km/hour North. What distance did the train travel while it was increasing its velocity, in units of meters?