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3 years ago

Plz i need help im stuck

Physics

1 answer:

iVinArrow [24]3 years ago

4 0

Answer:

Refraction makes the apple seem to be in a different location.

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Help me get a answer

daser333 [38]

Answer:

I think D sorry if I'm wrong

6 0

2 years ago

One time-honored but slightly unpleasant way in which a hobbyist determines how much energy is left in a 9-V battery is to touch

saw5 [17]

Answer:

There is a flow of current from the battery's positive terminal, through the hobbyist's tongue to the battery's negative terminal. Energy is been transferred from the battery to the hobbyist's tongue by the current.

5 0

4 years ago

What causes global winds?

11111nata11111 [884]

A: Temperature difference between air over land and air over water

8 0

3 years ago

The terminal speed of a sky diver is 163 km/h in the spread-eagle position and 325 km/h in the nosedive position. Assuming that

babymother [125]

Answer:

$\frac{A_1}{A_2}=3.97549776055$

Explanation:

The equation for terminal velocity is $v_t=\sqrt{\frac{2mg}{\rho AC_d}}$ , where m is the mass of the sky diver, g the gravitational acceleration, $\rho$ the air density, A the effective cross-sectional area and $C_d$ the drag coefficient.

It will be easier if we write this as $v_t^2 A=\frac{2mg}{\rho C_d}$ and realize that for both situations the right hand side of that formula will be the same. This means that $v_{t1}^2 A_1=v_{t2}^2 A_2=\frac{2mg}{\rho C_d}$ , so the ratio of the effective cross-sectional area A in the slower position ( $A_1$ for $v_{t1}=163 km/h$ ) to that in the faster position ( $A_2$ for $v_{t2}=325 km/h$ ) will be $\frac{A_1}{A_2}=\frac{v_{t2}^2}{v_{t1}^2}=3.97549776055$

4 0

4 years ago

Wich subatomic particles will you add or remove to change the mass of an atom? A)electrons and protons B)protons or neutrons C)e

jolli1 [7]

Technically all subatomic particles have a mass, however, electrons have such a small mass, they are insignificant and generally ignored. On the other hand, the mass of a proton and neutron are substantial, so B would be the correct answer.

6 0

3 years ago