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-Dominant- [34]
3 years ago
12

A person on a diet loses 1.6 kg in a week. How many micrograms/second (µg/s) are lost?

Physics
1 answer:
Ivan3 years ago
8 0
Based on the given values above, in order for us to get the answer, we need to convert the units first. So in 1 kilogram, there is 1,000,000 micrograms. In this case, 1.6 kilograms is 1,600,000 micrograms. For the week to seconds, 1 week is equivalent to 604,800 seconds. Therefore, 1,600,000 micrograms/604,800 seconds. So we are going to simplify this. So it would be 2.65<span>µg/s. Hope this answers your question.</span>
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The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0° above the horizo
Jobisdone [24]

(a) 4.0 m/s

We can solve this part just by analyzing the vertical motion of the froghopper.

The initial vertical velocity of the froghopper as it jumps from the ground is given by

u_y = u_0 sin \theta (1)

where

u_0 is the takeoff speed

\theta=58.0^{\circ} is the angle of takeoff

The maximum height reached by the froghopper is

h = 58.7 cm = 0.587 m

We know that at the point of maximum height, the vertical velocity is zero:

v_y = 0

Since the vertical motion is an accelerated motion with constant (de)celeration g=-9.8 m/s^2, we can use the following SUVAT equation:

v_y^2 - u_y^2 = 2gh

Solving for u_y,

u_y = \sqrt{v_y^2-2gh}=\sqrt{-2(-9.8)(0.587)}=3.4 m/s

And using eq.(1), we can now find the initial takeoff  speed:

u_0 = \frac{u_y}{sin \theta}=\frac{3.4}{sin 58.0^{\circ}}=4.0 m/s

(b) 1.47 m

For this part, we have to analyze the horizontal motion of the froghopper.

The horizontal velocity of the froghopper is

u_x = u_0 cos \theta = (4.0) cos 58.0^{\circ} =2.1 m/s

And this horizontal velocity is constant during the entire motion.

We now have to calculate the time the froghopper takes to reach the ground: this is equal to twice the time it takes to reach the maximum height.

The time needed to reach the maximum height can be found through the equation

v_y = u_y + gt

Solving for t,

t=-\frac{u_y}{g}=-\frac{3.4}{9.8}=0.35 s

So the time the froghopper takes to reach the ground is

T=2t=2(0.35)=0.70 s

And since the horizontal motion is a uniform motion, we can now find the horizontal distance covered:

d=u_x T = (2.1)(0.70)=1.47 m

7 0
3 years ago
When waves travel through water, why do the moving water particles continue to return to their starting position?
Marizza181 [45]

Answer:

Waves transfer energy, not matter

Explanation:

7 0
3 years ago
A rocket is launched from rest and moves in a straight line at 30.0 degrees above the horizontal with an acceleration of 35.0 m/
klemol [59]

Answer:

t = 123.59s

Explanation:

For the launch pad section:

Vf = Vo + a*t  where Vo=0.

Vf = 35*25 = 875m/s

The distance traveled during the launch:

d = Vo*t+\frac{a*t^2}{2} = 0+\frac{35*25^2}{2} = 10937.5m

Now the projectile motion, we know that its initial speed is the speed calculated previously and the initial height is the y-component of the previously calculated distance.

\Delta Y = Vo*sin(30)*t - \frac{g*t^2}{2}

-d*sin(30) = Vo*sin(30)*t - \frac{g*t^2}{2}  where d= 10937.5m; Vo=875m/s.

Solving for t:

t1 = -11.093s   t2 = 98.59s

So, the total time of flight will be:

t_{total} = t_{launch}+t_{projectile}=25+98.59 = 123.59s

6 0
3 years ago
The lithosphere contains rocks, soils, and minerals.
sergij07 [2.7K]

Answer: TRUE

Explanation:

Hope this helped :))

4 0
2 years ago
Read 2 more answers
Do this work if someone give correct answer I make her brainliest do this worksheet please
ArbitrLikvidat [17]

Sry,I only know the answer of q2

Chlorine is a non metal because it is bad conductor of heat and sodium is a metal because it is good conductor of heat.

The 3 ways in which metal is different from non metal are given below:

1)metal are good conductor of heat but nonmetal are bad conductor of heat.

2)metals are malleable but non metal aren't malleable.

3)metals are generally ductile but non metal aren't ductile.

Hope it will helpyou!

4 0
3 years ago
Read 2 more answers
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