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3 years ago

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At what time of day would you expect the New Moon to rise?

1 answer:

abruzzese [7]3 years ago

4 0

Answer:

At what time of day would you expect the New Moon to rise?

A) Midnight

B) Sunset

C) Noon

D) Sunrise

An HR diagram is a plot of:

A) Luminosity versus apparent magnitude.

B) Absolute magnitude versus luminosity.

C) Absolute magnitude versus surface temperature.

D)Apparent magnitude versus color index.

E) Color index versus surface temperature.

What is the most easily visible manifestation of the Earth's magnetic field?

A) The Van Allen radiation belts

B) The magnetopause

C) The aurorae

D) There is no easily visible manifestation of the Earth's magnetic field.

For a lunar eclipse (the moon is obscured from view), which phase is necessary?

A) third quarter

B) new moon

C) first quarter

D) full moon

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If my science fair project is about if girls can see through illusions better than boys, what would my background research be ab

SCORPION-xisa [38]

Honestly you should switch it up to something better cause honestly all depends on how the person was raised or the backround of them
it does not matter if your are a male or female

4 0

3 years ago

Alloys are mixtures of ________.

Hunter-Best [27]

Answer:

e.metals

Explanation:

5 0

4 years ago

Read 2 more answers

What is the concentration of OH– ions at a pH = 6?

makkiz [27]

<h3><u>Answer;</u></h3>

1 × 10^-8 M

<h3><u>Explanation</u>;</h3>

pH is given by the -log[H+] while

pOH is given by the -log[OH-]

But;

pH + pOH = 14

Thus; if pH is 6, then pOH = 8

pOH = 8

-log[OH-] = 8

[OH-] = 10^-8 M

The concentration of OH- ions at a pH of 6 is 1 × 10^-8 M

8 0

3 years ago

A proton is released in a uniform electric field, and it experiences an electric force of 2.04×10−14 N toward the south.

Lemur [1.5K]

Answer:

Part A:

$E=127500N/C\\E=1.275*10^{5} N/C$

Part B:

Option B (Towards the South)

Explanation:

Part A:

Magnitude if electric field E:

E=Force/charge

Force=2.04×10−14 N

Charge=1.6×10−19 C

$E=\frac{2.04*10^{-14}}{1.6*10^{-19}} \\E=127500N/C\\E=1.275*10^{5} N/C$

Part B:

Option B (Towards the South)

As electron is experiencing the force towards south,it means the direction of the electric field is towards the south because direction of field lines is from positive to negative, so proton is moving towards south it means negative charge is in south to which proton is attracted. So electric field is towards South.

7 0

3 years ago

After you pick up a spare, your bowling ball rolls without slipping back toward the ball rack with a linear speed of 2.85 m/s. T

motikmotik

Answer:

V' = 0.84 m/s

Explanation:

given,

Linear speed of the ball, v = 2.85 m/s

rise of the ball, h = 0.53 m

Linear speed of the ball, v' = ?

rotation kinetic energy of the ball

$KE_r = \dfrac{1}{2}I\omega^2$

I of the moment of inertia of the sphere

$I = \dfrac{2}{5}MR^2$

v = R ω

using conservation of energy

$KE_r = \dfrac{1}{2}( \dfrac{2}{5}MR^2)(\dfrac{V}{R})2$

$KE_r = \dfrac{1}{5}MV^2$

Applying conservation of energy

Initial Linear KE + Initial roational KE = Final Linear KE + Final roational KE + Potential energy

$\dfrac{1}{2}MV^2 + \dfrac{1}{5}MV^2 = \dfrac{1}{2}MV'^2 + \dfrac{1}{5}MV'^2 + M g h$

$0.7 V^2 = 0.7 V'^2 + gh$

$0.7\times 2.85^2 = 0.7\times V'^2 +9.8\times 0.53$

V'² = 0.7025

V' = 0.84 m/s

the linear speed of the ball at the top of ramp is equal to 0.84 m/s

6 0

3 years ago