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prohojiy [21]
3 years ago
10

A cyclist speeds up from 3 m/s to 7 m/s in 8 seconds. a. What is its change in velocity

Physics
1 answer:
den301095 [7]3 years ago
3 0

Answer:

cant see to find the answer sorry :( i tried :( good luck !! youll do great <333

Explanation:

sorry ;( best of luck

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Examine the image shown here. Bike helmets like this one have padding made of foam under the hard exterior of the plastic. The f
LenKa [72]

The foam decreases the time of impact.

<h3 />

<h3>What is Impulse?</h3>

The Impulse applied to an object causes a change in the momentum of the object. Impulse is the product of force and time of impact.

J = Ft

where;

  • J is the impulse
  • F is the applied force
  • t is the time of impact

The increase in the time of impact increases the impulse experienced by the object, and a decrease in the time of impact causes a decrease in the impulse experienced by the object.

Thus, we can conclude that the foam decreases the time of impact because it cushions the effect of impact.

Learn more about impulse here: brainly.com/question/25700778

8 0
2 years ago
Low-grade uranium ore contains a fraction of a percent (by weight) of uranium; very high-grade ore (as is found in some deposits
kolezko [41]

Answer:

2.857 gm

Explanation:

<u>Step 1: Energy from uranium fission </u>

The ratio of energy reeled from uranium to coal= 2.5 million times=2.5*10⁶

<u>step2: mass of uranium 235 required </u>

To get the same energy that of 1 ton coal, the mass reuied will be = (1/2.5) * 10⁻⁶ ton=0.4 * 10⁻³ Kg

where we have taken 1 ton = about 1000Kg

<u>step3: mass of uranium </u>

mass of u-235 = 70% of natural Uranium=0.7 Mu

So Mu= (1/0.7 )* mass of U-235=(0.4 * 10⁻³ Kg)/0.7=0.571 gm

<u>Step 4: Mass of ore </u>

mass of Mu = 20% of ore=0.2 M

So, mass of ore= (1/0.2 )* mass of MU-=(0.571)/0.2 gm=2.857 gm

6 0
4 years ago
Please define newtons 1st law of motion.
ExtremeBDS [4]
It says an object will remain at rest unless external forces act upon it.
6 0
3 years ago
Read 2 more answers
How can you drop two eggs the fewest amount of times, without them breaking?​
MA_775_DIABLO [31]

Answer:

Simply drop the egg from one inch above your foot and it will not break.

Explanation:

3 0
2 years ago
6. For the following graph what can you conclude about the force applied to cause the object’s motion? Explain your reasoning
RSB [31]

Answer:

For each second the position increased by 10 m

3 0
3 years ago
Read 2 more answers
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