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borishaifa [10]

3 years ago

9

The diagram shows how Earth is tilted on its axis as it revolves around the Sun. What is the season in the United States when Ea

rth is in position C

1 answer:

Fudgin [204]3 years ago

5 0

Winter

It is winter because the Northern Hemisphere is not facing the sun.

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Type O negative blood is considered the universal red blood cell donor because it _____.

marissa [1.9K]

Answer:

Honestly i think the answer is B

Explanation:

4 0

3 years ago

If a mass of .343 kg moves down a 5m ramp in 5.8 seconds, what is the velocity and KE developed by the moving mass

Soloha48 [4]

Velocity 0.86m/s

0.13J

Explanation:

Given parameters:

Mass = 0.343kg

distance = 5m

time taken = 5.8s

Unknown:

Velocity of mass = ?

Kinetic energy = ?

Solution:

Velocity is the rate of change of displacement with time. It is a vector quantity that shows magnitude and direction.

Mathematically;

Velocity = $\frac{displacement}{time}$

Velocity = $\frac{5}{5.8 }$ = 0.86m/s

Kinetic energy is the energy due to the motion of a body. It is expressed mathematically as:

Kinetic energy = $\frac{1}{2} m v^{2}$

m is the mass

v is the velocity

Kinetic energy = $\frac{1}{2 } x 0.343 x 0.86^{2}$ = 0.13J

learn more:

Kinetic energy brainly.com/question/6536722

#learnwithBrainly

7 0

3 years ago

Two charges, q1 and q2, are separated by a certain distance r. if the magnitudes of the charges are halved and their separation

vazorg [7]

The electrical force between these two charges remains the same. In coulomb’s law, it states that the magnitude of two charges (product of two charges) is inversely proportional to the square of the distance. Since both the magnitude and the distance are halved, therefore, the change in both quantities will have no effect in the value of electrical force.

6 0

3 years ago

CAN SOMEONE HELP ME PLEASE AND SHOW WORK

riadik2000 [5.3K]

Answer:

.3,.29

Explanation:

all you gotta is divide the distance traveled by the velocity which is simply 6.5/22

the answer comes out as .295454...

7 0

3 years ago

A person on a rocket traveling at 0.47 c (with respect to the Earth) observes a meteor come from behind and pass her at a speed

zhannawk [14.2K]

The concept to solve this problem is related to the relativistic physics for which the speed of the object in different frames of reference is related. This concept is called Velocity-addition formula

and can be written as,

$u = \frac{v+u'}{1+\frac{vu'}{c^2}}$

Where,

u = Velocity of a body within a Lorentz Frame

v = Velocity of a second frame

u'= The transformed velocity of the body within the second frame

c = speed of light

Replacing we have to

$u = \frac{v+u'}{1+\frac{vu'}{c^2}}$

$u = \frac{0.47c+0.47c}{1+\frac{0.47c*0.47c}{c^2}}$

$u = 0.769c$

$u \approx 230'700.000m/s$

Therefore the meteor moving with respect to the Earth to 230'700.000m/s

7 0

3 years ago