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3 years ago

Days when the sun’s light hits both hemispheres equally are called __________.

1 answer:

8 0

It is called an equinox. This days happen because the plane of the Earth's equator passes through the center of the Sun, in result, the light coming from it hits both hemispheres equally. Hopefully my answer has come to your help.

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What is the mass of a bird if it has a potential energy of 147J when flying at a height of 30 m above the ground?

Artist 52 [7]

Answer:

0.5kg

Explanation:

Given parameters:

Potential energy = 147J

Height = 30m

Unknown:

Mass of the bird = ?

Solution:

Potential energy is the energy due to the position of a body. Now, the expression for finding the potential energy is given as;

P.E = mgH

m is the mass

g is the acceleration due to gravity = 9.8m/s²

H is the height

147 = m x 9.8 x 30

m = 0.5kg

5 0

3 years ago

A sprinter starts from rest and accelerates to 10. m/sec in a time interval of 1.0 seconds, Calculate the runner's acceleration

Volgvan

The runner's acceleration during this time interval is 10 $m/s^2$

Given the following data:

Initial velocity, U = 0 m/s (since the sprinter is starting from rest).

Final velocity, V = 10.0 m/s

Time, t = 1.0 seconds.

To calculate the runner's acceleration during this time interval, we would use the first equation of motion;

Mathematically, the first equation of motion is calculated by using the formula;

$V = U + at$

Where:

a is the acceleration.

V is the final velocity.

U is the initial velocity.

t is the time measured in seconds.

Substituting the given parameters into the formula, we have;

$10 = 0 + a(1)\\\\10 = a$

Therefore, the runner's acceleration during this time interval is 10 $m/s^2$

Read more: brainly.com/question/8898885

8 0

3 years ago

Three resistors of 100, 40.0, and

Allisa [31]

Answer:

0.16 A

Explanation:

V = IRtotal

24V = I(100 + 40 + 10)

I = 0.16 A

8 0

3 years ago

We never see a crescent jupiter from earth because jupiter __________.

solmaris [256]

Answer: The earth is keeping up with the planet as they orbit the sun, so we don't get the angle to see a crescent

6 0

2 years ago

Physics Help Please!!! All multiple choice!

Natasha_Volkova [10]

1) True.
Uniform circular motion means that the angular velocity $\omega$ is constant, and since the centripetal acceleration is given by
$a=\omega ^2 r$
if $\omega$ is constant, then a is constant.

2) The correct answer is
a.) the angular velocity and linear velocities are the same
The three knots are in fact on a circle, therefore the angular velocities are the same (because they cover the same angle in the same time) and the linear velocities are the same as well, because it is given by
 $v=r \omega$
and since both r(distance from the center) and $\omega$ are the same, v is also the same.

3) b.) toward the center
In fact, an object can move on a circular path only if there is a force pushing towards the center. This force is called "centripetal force".

3 0

3 years ago