Two astronauts, A and B, both with mass of 60Kg, are moving along a straight line in the same direction in a weightless spaceshi

Answer:

The initial speed at which the baseball is thrown is 20.58 m/s

Explanation:

To determine the time taken to reach the peak height in projectile motion, the formula is:

t = (u sin θ)/g

Where u = initial speed of the baseball =?

θ = angle of launch above the horizontal

g = gravitational acceleration = 9.8 m/s²

1.05 = (u sin 30)/9.8

u can be calculated as (1.05 × 9.8)/0.5

u = 20.58 m/s

Let Cp represent the specific heat of the metal object. To find this, we can set up a heat balance equation (heat lost by metal = heat gained by water):

- 19g * Cp * (22degC – 96degC) = 75g * 4.184J/g degC * (22degC - 18degC)

<span>Cp = 0.893 J/g degC</span>

A tennis player recovering from an ankle injury, restricted from pivoting, can keep her cardiovascular fitness by using the rowing machine, pedaling on a stationary bike with one leg, or swimming. These exercises do not necessitate directional changes and are safe for her injury.

Answer:

times

Explanation:

To approach this question, we first express the universe's age and the top quark's lifespan in scientific notation.

Age of the universe:

(1 followed by 17 zeros)

Lifetime of the top quark:

(the decimal point is shifted 24 places to the right)

To provide an answer, we will compute the ratio of the age of the universe to the lifespan of the top quark:

The energy contained in a photon is determined by the formula:

where h represents the Planck constant and f signifies the frequency of the photon. Given the energy of the photon, , we can rearrange the equation to deduce the photon's frequency:


Now, we can use the relationship that links frequency f, wavelength , and the speed of light c to ascertain the wavelength of the photon: