The graph below represents changes in water. What process is occurring during section “B” of the graph?

Which of the following is not a step toward planning your goals ?

Simora [160]

Answer:

Disregard a goal if you don't achieve it

Explanation:

This is because in achieving your targets/goals/dreams rewarding yourself for every small accomplishment is very important. It’ll help to keep you motivated and keep your head in the game. Similarly setting short and long-term objectives also plays a vital role. Setting a date is also important because it helps you to put your plan into action. However, disregarding a goal isn’t an option

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5 0

2 years ago

Consider an eraser, weighing 20g, sitting 5cm from the center of a turntable (flat disk attached to a motor which can spin the d

Artist 52 [7]

Answer:

A. 42.3 revolution per minute

B. Centripetal Force

Explanation:

20 g = 0.02 kg

5 cm = 0.05 m

Let g = 9.8 m/s2

A.The friction force acting on the eraser is the product of normal force and its coefficient:

$F_f = N\mu = mg\mu = 0.02*9.8*0.1 = 0.0196 N$

For the eraser to begin slipping, its centripetal acceleration must win over the acceleration created by friction force, which is

$a_f = F_f / m = 0.0196 / 0.02 = 0.98 m/s^2 = a_c$

We can calculate the angular velocity from this:

$a_c = \omega^2 r$

where r = 0.05 is the radius of rotation, which is distance from the center to the eraser

$\omega^2 = a_c/r = 0.98 / 0.05 = 19.6$

$\omega = \sqrt{19.6} = 4.43 rad/s$

If it spins and angle of 4.43 rad per second then for every minute (60 seconds) it would spin an angle of 4.43 * 60 = 265.6 rad/min

Since 1 revolution is 2π rad, then in a minute it would spin 265.6 / 2π = 42.3 revolution/minute

B. The force responsible for making the eraser go faster while the turntable is spinning up would be the centripetal force.

7 0

3 years ago

How does a bicycle rider's energy of motion changes as the gain speed while riding down a hill?

kaheart [24]

It is b. It gains momentum when going down. Think of it like a sled. When you go up the hill, it goes slower, but when you go down the hill, you gain speed(momentum) and it increases

8 0

4 years ago

The terminals of a 0.70 Vwatch battery are connected by a 80.0-m-long gold wire with a diameter of 0.200 mm What is the current

Molodets [167]

Answer:

I = 11.26 mA

Explanation:

given,

V = 0.7 V length = 80 m

diameter = 0.2 mm = 0.02 cm

radius = 0.01 × 10⁻² m

$resistance = \dfarc{\rho l}{A}$

ρ for gold wire = 2.44 × 10⁻⁸ ohm-m at 20 °C

A = cross sectional area = π r² = π (0.01 × 10⁻² )²

= 31.4× 10⁻⁹ m²

$resistance = \dfarc{2.44\times 10^{-8} \times 80}{31.4\times 10^{-9}}$

R = 62.165 Ω

$I = \dfrac{V}{R}$

$I = \dfrac{0.7}{62.165}$

I = 11.26 mA

8 0

3 years ago

With the intensity at about half of maximum, how does the current change when you increase the frequency of the light?

PIT_PIT [208]

Answer:

Increase

Explanation:

Energy of given as follows

E = h f

Where f is the frequency of incident light

when high frequency light falls then it will increase the number of produce photon and that increase in number of photon will lead to increase in the number of electron.When number of electron will increase it mean that current will also increase.

So we can say that when frequency increase then current will increase.

4 0

3 years ago