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3 years ago

A boy rides a sled down a steep, snow.covered hill. Which of

Physics

2 answers:

shtirl [24]3 years ago

5 0

Answer:

Potential energy decreases and kinetic energy increases.

Explanation:

That was the answer on my CK12

Travka [436]3 years ago

4 0

Answer:

a. Potential energy decreases and Kinetic energy increases

Explanation:

Because as he comes down due to its steepness the speed of the boy or you can say his KE increases and since he comes from a high position (hill) to the lower ground his potential energy decreases simultaneously

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A cyclist is riding his bike up a mountain trail. When he starts up the trail, he is going 8 m/s. As the trail gets steeper, he

frez [133]

Answer:

$\boxed {\boxed {\sf a\approx -0.08 \ m/s^2}}$

Explanation:

Acceleration can be found by dividing the change in velocity by the time.

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

The final velocity is 3 meters per second. The initial velocity is 8 meters per second.

We need to convert the time to seconds.

t= 1 minute
60 seconds = 1 minute
t=60 seconds

So, we know that:

$v_f=3 \ m/s \\v_i= 8 \ m/s\\t= 60 \ s$

Substitute the values into the formula.

$a=\frac{3 \ m/s - 8 \ m/s}{60 \ s}$

Solve the numerator.

3 m/s - 8 m/s = -5 m/s

$a=\frac{-5 \ m/s}{60 \ s}$

Divide.

$a=-0.0833333333 \ m/s/s$

Let's round to the nearest hundredth.

The 3 in the thousandth place tells us to leave the 8 in the hundredth place.

$a\approx -0.08 \ m/s^2$

The cyclist's acceleration is about $\boxed {-0.08 m/s^2}$

8 0

3 years ago

a piping system consists of 100 ft of 2-inch pipe, a sudden expansion to 3-inch pipe, and then 50 ft of 3-inch pipe. Water is fl

ikadub [295]

Answer:

16+15+19= ??

Am just messign with u lol

Explanation:

anwser s 19 inches

8 0

3 years ago

The red light emitted by a helium–neon laser has a wavelength of 632.8 nm. What is the frequency of the light waves?

Monica [59]

f = 4.74 × 10 ^14 Hz

hope this helps:)

5 0

3 years ago

If a wave has a wavelength of 4m and a frequency of 2.5hz what is the velocity of the wave

poizon [28]

Answer:

10 m/s

Explanation:

Velocity = frequency * wavelength

Velocity = 2.5 * 4

Velocity = 10 m/s

3 0

3 years ago

In a population of seals, most of the seals have similar coloring. However, one seal has albinism. This seal is white and is alm

timofeeve [1]

<span>The cause of albinism in one seal in a population of seals with similar coloring is gene mutation. Albinism is a recessive trait caused by a mutation in the gene for the enzyme which is important in melanin synthesis. Since melanin is a pigment responsible for hair and skin colour, the gene mutation will cause the absence of melanin and thus, albinism.</span>

6 0

3 years ago

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