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3 years ago

WILL GIVE BRAINLIEST AND 30 POINTS!

Physics

2 answers:

frez [133]3 years ago

8 0

Answer:

The answer is 16 and 24

Explanation:

DanielleElmas [232]3 years ago

6 0

Answer:

1. A

2. C

Explanation:

1. 1600/100 = 16

2. 67 = 1600/x

x = 1600/67

23.88059701

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

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3 years ago

Which is a disadvantage of using wind as an energy source? Check all that apply.

Anvisha [2.4K]

Answer: It may be unreliable.

Explanation:

Harnessing wind a s a source of energy is very efficient and renewable. It does not produce any waste and is environment friendly energy resource because it is naturally occurring.

But it is unreliable. The wind is the motion of air from high pressure region to low pressure region. Thus, we cannot start or stop wind turbines to spin. It depends on the wind and its speed.

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3 years ago

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A penguin slides at a constant velocity of 1.43 m/s down an icy incline. The incline slopes above the horizontal at an angle of

andrew11 [14]

Answer:

t =1.285 s

Explanation:

u=1.43 m/s

∅=6.47°

We know that μ(k)=tan∅

F(net)=-f(k)

ma =μ(k)*m*g

a =μ(k)*g equation 1

v=u+at

0=u+(μ(k)*g*t

Putting values

t=u/(g*tan∅)

t= $\frac{1.43}{9.81*tan(6.47)}$

t=1.285 s

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3 years ago

What day of the year is solar time the same as sidereal time?

Illusion [34]

Answer:

I think the answers March 21

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3 years ago

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kozerog [31]

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