3 years ago

Why is soap solution a better cleansing agent than ordinary water?

1 answer:

8 0

Because it has ingredients in it that will get more Germs off your skin than ordinary water. So, use soap when you wash your hands. XD

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What behavior of light proves that it is a wave? Hint: will this ONLY happen because light is a wave, or could it also be true o

kiruha [24]

It’s red shift and blue shift because This only occurs when the frequency of the wave is made longer or shorter due to the movement of the source relative to the observer

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3 years ago

describe the physics modeling process in moving a basketball and say what effects you should overlook

Dahasolnce [82]

Answer:ui9i

Explanation:

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3 years ago

Convection currents, which affect weather and climate, are created by

Lena [83]

Answer:

uneven heating of the earth

Explanation:

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2 years ago

You hold a metal block of mass 40 kg above your head at a height of 2 m.

Kitty [74]

Answer:

The work done by gravity is 784 J.

Explanation:

Given:

Mass of the block is, $m=40\ kg$

Height to which it is raised is, $h=2\ m$

Acceleration due to gravity is, $g=9.8\ m/s^2$

Now, work done by gravity is equal to the product of force of gravity and the distance moved in the direction of gravity. So,

$\textrm{Work by gravity}=F_g\times h$

Force of gravity is given as the product of mass and acceleration due to gravity.

$\therefore F_g=mg=40\times 9.8=392\ N$ . Now,

$\textrm{Work by gravity}=F_g\times h=392\times 2=784\ J$

Therefore, the work done by gravity is 784 J.

5 0

3 years ago

When a ball is thrown straight up with no air resistance, the acceleration at its highest point. A) is upward B) is downward C)

Illusion [34]

Answer:

B) is downward

Explanation:

The acceleration is always downward, because it is the gravitational acceleration.

When the ball is going up the acceleration is opposing the movement, and when the ball is going down the velocity has the same direction as the acceleration

7 0

4 years ago