In projectile motion, the vertical velocity is independent of the horizontal velocity so we can completely ignore it. The vertical velocity is, using trigonometry, 18sin35° which is equal to 10.3 m/s.
Using a = -9.8 m/s^2 and u= 10.3 and V= 0 (because at a point, the object will be hovering in the air with 0 speed before coming back down), we have
v = u + at
=> (v-u)/a = t
=> (0-10.3)/a = t
=> -10.3/-9.8 = t
=> t = 1.05 s
the time taken to come down will be the same as the time taken to go up so total time before ball hits the ground is double the value we just found
which is 2 x 1.05 = 2.10 seconds
Answer:
218.93 km
Explanation:
= Angle between the paths of the two boats = 54.10°
Distance = Speed × Time
Distance traveled by one boat = 
Distance traveled by other boat = 
From the triangle law of vectors we have
The distance they will be apart after 3 hours is 218.93 km
Answer:
Hank u so much out don't know how much this rally
Explanation:
<span>Q = mL
</span>
We need to know the latent heat of fusion, L, for 0 degrees.
L = 336 kJ/kg, m = 2kg
where L is the latent heat for vaporization
Q = 2 * 336 = 672 kJ
For conversion between 0 and 100 degree Celsius
Q = mcθ, specific heat capacity = 4.2 kJ/kgK
Q = 2*4.2* (100 - 0) = 840 kJ
For conversion to steam at 100 degrees Celsius
<span>Q = mL , L = latent heat of vaporization = 2256 kj/kg
</span>
Q = 2 * 2256 = 4512 kJ
Total heat = 672 + 840 + 4512 = 6024 kJ
= 6 024 000 J
But 1 calorie = 4.2 J
Therefore 6 024 000 J will be: 6 024 000/4.2 ≈ 1 434 286 Calories
≈ 1 434 kCalories
<span>A transverse wave is a moving wave that consists of oscillations occurring perpendicular (or right angled) to the direction of energy transfer. If a transverse wave is moving in the positive x-direction, its oscillations are in up and down directions that lie in the y–z plane. Light is an example of a transverse wave.</span>
