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3 years ago

I will fan and give 2 medals!!!!!!

Physics

1 answer:

Maksim231197 [3]3 years ago

7 0

Corona

I. Rare gaseous envelope

II. Irregular pearly glow

III. Total solar eclipse

IV. Surrounds darkened moon

V. Caused by diffraction

Solar Prominence

I. loop shape

II. large bright gaseous

III. luminous hydrogen gas

IV. rises above chromospheres

V. anchored to surface (sun’s surface)

Solar Flare

I. Intense High-energy

II. Causes electromagnetic disruptions

III. In solar atmosphere

IV. Varies in brightness

V. Emits radiation

Sunspots

I. Surface dark spots

II. Strong magnetic fields

III. Solar magnetic storms

IV. Visible through telescope

V. Cooler than photospheres

I did this in class I got 100%

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The efficiency of a modern bicycle is 95% if you exert 200 Joules of input work pedaling a bicycle on level ground what is the u

Delvig [45]

Answer:

95 J

Explanation:

You can calculate efficiency by dividing useful output by total input, then multiplying it to 100.

So the foumula goes like:

Efficiency= (Useful output/Total input)x100

In this question,

Efficiency= 95%

Useful output= x

Total input= 200

Therefore;

95=(x/200)x100

0.95=x/100

x=0.95x100

x=95 Joules

8 0

3 years ago

Which has more potential energy: a book on the floor or the same book on a table? Explain your answer.

sergij07 [2.7K]

Answer:

The same book on a table has more potential energy.

Explanation:

The potential energy of a body on Earth is defined as the energy possessed by the virtue of its heights.

The equation for gravitation potential energy is given by

P.E = mgh joules

From the above equation it is evident that when there is a change in the value of 'h', there is a change in the value of P.E

So, as per the above equation, the potential energy of book on floor

P.E = m x g x 0 ∵ h = 0 at floor

P.E = 0

The same book on the table has some magnitude in 'h' greater than zero

So, the same book on a table has more potential energy.

8 0

3 years ago

What is the biggest disadvantage of using nuclear power to produce electricity?

Flauer [41]

Answer:

Explanation:

Nuclear waste must be safely stored for many years because it is bad to store that much nuclear waste.

7 0

3 years ago

Read 2 more answers

Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an el

Nutka1998 [239]

Answer:

The theoretical fracture strength of a brittle material is 26465.29 MPa.

Explanation:

Given that,

Length = 0.54 mm

Radius curvature $R=3.4\times10^{-3}\ mm$

Stress = 1050 MPa

We need to calculate the theoretical fracture strength of a brittle material

Using formula of strength

$\sigma_{m}=2\sigma_{0}(\dfrac{l}{\rho_{t}})^{\frac{1}{2}}$

Where, l = length of the crack

$\rho_{t}$ = tip radius of curvature

Put the value into the formula

$\sigma_{m}=2\times1050\times(\dfrac{0.54}{3.4\times10^{-3}})^{\frac{1}{2}}$

$\sigma_{m}=26465.29\ MPa$

Hence, The theoretical fracture strength of a brittle material is 26465.29 MPa.

4 0

3 years ago

A rocket fires its engines to launch straight up from rest

alexira [117]

Weow that’s cool but what is your question

3 0

3 years ago