When the photosphere is covered, the corona, chromospheres, and prominences are visible.

true or false?

Which type of star is the sun? red giant black dwarf main-sequence black hole

Anna applies a force of 19.5 newtons to push a book placed on a table. If the normal force of the book is 51.7 newtons, what is the coefficient of kinetic friction? A0.01 B0.20 C0.38 D0.48

Lilian has had enough of Tiffany's antics and high jinks and walks over to Tiffany's table. with an initial speed of 2 m/s, Lilian accelerates at a rate of 18 m/s/s for 1.5 seconds, what is her final speed?

A box with a mass of 12.5 kg sits on the floor. how high would you need to lift it for it to have a gpe of 355 j

If there is an attractive force between all objects, why do we not feel ourselves gravitating toward massive buildings in our vicinity?

An example of a stable system

What causes chemical weathering? a. damage caused by animals and plants c. natural acids b. ice wedging d. physical factors

1. Strzała o masie 20 g tuż po wystrzale ma prędkość 50 m/s. Oblicz pracę wykonaną przez zawodniczkę. Ile wynosi energia potencjalna sprężystości napiętej cięciwy? 2. Na trampolinę o współczynniku sprężystości k=2 kN/m stanął zawodnik o masie 80 kg.

Two small plastic spheres between them has magnitude 0.22 N. What is the charge on each sphere is one the other? Explain whether it can be determined from the information give, whether the charges are positive or negative.

If it has enough kinetic energy, a moleculeat the surface of the Earth can escape the Earth's gravitation. The acceleration of gravity is 9.8 m/s2, and the Boltzmanns' constant is 1.38066*10-23 J/K.