D because gamma rays and ultra violet rays are one of the examples of the three ways to transfer heart which is convection, radiation, and conduction.

5 0

3 years ago

What about a moving object rarely stays the same?

Masja [62]

The speed as witch it is moving

8 0

3 years ago

An airplane flies horizontally with a constant speed of 172.0 m/s at an altitude of 1390 m. A package is dropped out of the airp

Sever21 [200]

Answer:

(a) - 165.032 m/s

(b) 238.37 m/s

Explanation:

initial horizontal velocity, ux = 172 m/s

height, h = 1390 m

g = 9.8 m/s^2

Let it strikes the ground after time t.

Use second equation of motion in vertical direction

$s=ut+\frac{1}{2}at^{2}$

-1390 = 0 - 0.5 x 9.8 x t^2

t = 16.84 second

(a) Let vy be the vertical component of velocity as it strikes the ground

Use first equation of motion in vertical direction

vy = uy - gt

vy = 0 - 9.8 x 16.84

vy = - 165.032 m/s

Thus, the vertical component of velocity as it strikes the ground is 165.032 m/s downward direction.

(b)

The horizontal component of velocity remains constant throughout the motion.

vx = 172 m/s

vy = - 165.032 m/s

The resultant velocity is v.

$v=\sqrt{172^{2}+165.032^{2}}$

v = 238.37 m/s

Thus, teh velocity with which it hits the ground is 238.37 m/s.

8 0

4 years ago

Wave C has an amplitude of 1 and wave D has an amplitude of 3 as shown below. What will happen when the crests of these two wave

Leya [2.2K]

Answer:
Amplitude 4

When the two waves collide, because they are both crests there is constructive interference. This mean that at the point of collision the amplitude increases.

You add both the amplitudes
1+3=4

6 0

3 years ago