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notsponge [240]
2 years ago
9

Which type of mirror would you use to cook a hot dog and why?

Physics
1 answer:
alexandr1967 [171]2 years ago
8 0
As long as it’s a good mirror then any one of them is fine bc at the end of the day i’m getting a hot dog
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Select ALL that apply. The stages of a human's lifespan include:
Alex787 [66]

Answer:

The answers are A and C

Explanation:

the order of a humans lifespan is: Infancy, early childhood, adolescence, adulthood, then elderly

6 0
3 years ago
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A boy throws a ball with an initial velocity of 19.6 m/s. What maximum height does the ball reach?
Wewaii [24]
<h2>Hello!</h2>

The answer is: 19.59 m

<h2>Why?</h2>

Since there is no information about the launch type, we can assume that the ball is thrown vertically upward.

When the ball reaches the maximum height, just at that moment, the velocity turns to 0, and after that moment, the ball starts falling, so:

We will use the following formula:

Vf^2=Vi^2+2*g*s

Where:

Vf= Final velocity = 0

Vi= Initial velocity = \frac{19.6m}{s}

g = Gravity Acceleration = \frac{9.81m}{s^{2} }

s = Traveled distance

0=19.6^2+2*-9.81*s\\s=\frac{19.6^2}{2*9.81}=\frac{384.16}{19.62}=19.59m

Have a nice day!

8 0
3 years ago
Which illustrates different states of a substance?
DanielleElmas [232]

Answer:

Ice and water vapor.

Explanation:

Ice is a solid state and water vapor is gas. Gas comes from water being heated. Plasma is also a fourth, less known, state of matter. I hope this helps. :)

6 0
3 years ago
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A very hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. The ball rebounds back
saw5 [17]

Answer:

The force exerted by the floor is 80 N.

Explanation:

Given that,

Mass of ball = 0.5 kg

Velocity= 4 m/s

Time t = 0.05 s

When the ball rebounds then the kinetic energy is

K.E =\dfrac{1}{2}mv^2

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v = velocity of ball

Put the value into the formula

K.E=\dfrac{1}{2}\times0.5\times(4)^2

K.E = 4\ J

The average force exerted by the floor on the ball = change in kinetic energy over collision time

F = \dfrac{4}{0.05}

F=80\ N

Hence, The force exerted by the floor is 80 N.

4 0
3 years ago
Which frequencies can humans can hear but not mice
Blizzard [7]
Of approximately 1 to 4 kHz6 and approximately 16 kHz for mice.
6 0
3 years ago
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