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iogann1982 [59]
3 years ago
10

Eli rolled a ball down the cement sidewalk as hard as he could. The ball rolled for less than a minute before it came to a stop.

What force acted to slow and finally stop the ball? A. friction, acting in the same direction as the motion of the ball B. the normal force, pushing upward on the ball C. friction, acting in opposition to the motion of the ball D. the normal force, pulling downward on the ball
Physics
1 answer:
xeze [42]3 years ago
6 0
The answer is C. friction, acting in opposition to the motion of the ball


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In a paragraph, contrast the characteristics between anorexia and bulimia
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6 0
3 years ago
Can i please get some help with this.
Ivenika [448]

the answer is D cuz electricity is a conductive

5 0
3 years ago
A carbon resistor is to be used as a thermometer. On a winter day when the temperature is 4.00°C, the resistance of the carbon r
dusya [7]

Answer:

28 degree C

Explanation:

We are given that

T_1=4.00^{\circ}

R_1=217.7 \Ohm

R_2=215.1\Ohm

\alpha=-5.00\times 10^{-4}C^{-1}

We have to find the temperature on a spring day when resistance is 215.1 ohm.

We know that

\alpha(T_2-T_1)=\frac{R_2}{R_2}-1

Using the formula

-5.00\times 10^{-4}(T_2-4)=\frac{215.1}{217.7}-1

-5\times 10^{-4}(T_2-4)=0.988-1=-0.012

T_2-4=\frac{0.012}{5\times 10^{-4}}=24

T_2=24+4=28^{\circ}C

Hence, the temperature  on a spring day 28 degree C.

7 0
3 years ago
What's the dielectric constant of ceramic?<br> A. 1,200<br> B. 900<br> C. 80<br> D. 7.500
I am Lyosha [343]

Answer:

7.5

Explanation:

The dielectric constant of ceramics is about 7.5.

The dielectric constant of a substance is the ratio of the electric permeability of a substance to the electric permeability of free space.

Dielectric constant gives a good overview about the ability of substance to store charges compared to another.

Most substances have their electric constant and they suggest the ease by which they can store electrical energy. This is very important in developing capacitors.

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3 years ago
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ELEN [110]

Answer:

C. Reduces the amount of items that go into landfills

Explanation:

took the test and got it right

5 0
3 years ago
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