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3 years ago

What is another word for cycles per second??

Physics

1 answer:

Hatshy [7]3 years ago

5 0

Frequensey or hertz, I looked this up on the internet!

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A sports car accelerates uniformly from rest to a speed of 87 mi/hr in 8s. Determine: a.The acceleration of the car

Furkat [3]

Answer:

Part a)

$a = 4.86 m/s^2$

Part b)

$d = 155.52 m$

Part c)

$v_f = 48.6 m/s$

Explanation:

As we know that car start from rest and reach to final speed of 87 mph

so we have

$v_f = 87 mph = 38.88 m/s$

now we have

Part a)

acceleration is rate of change in velocity

$a = \frac{v_f - v_i}{t}$

$a = \frac{38.88 - 0}{8}$

$a = 4.86 m/s^2$

Part b)

distance moved by car with uniform acceleration is given as

$d = \frac{v_f + v_i}{2} t$

$d = \frac{38.88 + 0}{2} 8$

$d = 155.52 m$

Part c)

As we know that the car start from rest

so final speed after t = 10 s

$v_f = v_i + at$

$v_f = 0 + (4.86)10$

$v_f = 48.6 m/s$

3 0

3 years ago

3. To open a soda bottle, a force of 55.0 N is applied to the bottle opener. If the bottle opener

Bogdan [553]

Answer:

0.0815

Explanation:

Mechanical advantage is output force/input force. So all you have to do is 55.0N/675N ~ 0.0815

Hope this helped!

5 0

3 years ago

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.

lorasvet [3.4K]

$\large{\underline{\underline{\pmb{\frak {\color {red}{Question:}}}}}}$

$\sf \red{When \: baking \: soda \: is \: mixed \: with \: lemon \: juice, \: bubbles \: are \: formed \: with \: the \: evolution \: of \: a \: gas.}$

$\large{\underline{\underline{\pmb{\frak {\color {blue}{Answer:}}}}}}$

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. The gas is formed in the reaction is Carbon dioxide. $CO_{2}$ is formed.

The change which happened in this reaction is a chemical change.

$\boxed{ \frak \green{Explanation}}$

Since, in chemical change we can't bring a substance to it's actual form how it was in earlier.

Examples: burning of paper is chemical, since we can't get the fine paper again after it is burnt.

Thus, the above reaction is also a chemical change, since we can't get back the lemon juice how it was earlier.

$\boxed{ \frak \red{Brainlysamurai}}$

5 0

2 years ago

This important factor of survival for the coral reef is

inna [77]

Answer: biotic

Explanation:

6 0

2 years ago

Which one is it<br> Plz help me :)

Gennadij [26K]

Answer:

5 I think will be none of the above and 6 could be all of the above

8 0

2 years ago