Which of these is a base? HNO3 vinegar ammonia HCl

A projectile is fired at an angle such that the vertical component of its velocity

mestny [16]

Answer:

It takes 3 seconds to reach its high point

Explanation:

Projectile Motion

In a projectile motion (or 2D motion), the object is launched with an initial angle θ and an initial velocity vo.

The components of the velocity are

$v_{ox}=v_o\cos\theta$

$v_{oy}=v_o\sin\theta$

The speed in the horizontal direction at any time t is:

$v_y=v_o\sin\theta-g.t$

The time taken to reach the maximum height is when vy=0, or:

$\displaystyle t_m=\frac{v_o\sin\theta}{g}$

We are given the y-component of the velocity, thus:

$\displaystyle t_m=\frac{30~m/s}{10~m/s^2}$

$t_m=3~s$

It takes 3 seconds to reach its high point

3 0

3 years ago

Newton discovered that sunlight was composed of colors. True or False

KonstantinChe [14]

Answer:

True

Newton's Rainbow. In the 1660s, English physicist and mathematician Isaac Newton began a series of experiments with sunlight and prisms. He demonstrated that clear white light was composed of seven visible colors.

Explanation:

Hope it helps

5 0

3 years ago

What is the final velocity of a rocket that is traveling at 205 m/s and accelerates at

-Dominant- [34]

Answer:

70,100 m/s

Explanation:

Given:

v₀ = 205 m/s

a = 8.03 m/s²

Δx = 1750 m

Find: v

v² = v₀² + 2aΔx

v² = (205 m/s)² + 2 (8.03 m/s²) (1750 m)

v = 70,130 m/s

Rounding to three significant figures, the final velocity is 70,100 m/s.

7 0

4 years ago

A car leaves an intersection traveling west. Its position 4 sec later is 21 ft from the intersection. At the same time, another

Alex_Xolod [135]

Answer:

15.8 ft/s

Explanation:

$\frac{da}{dt}$ = Velocity of car A = 9 ft/s

a = Distance car A travels = 21 ft

$\frac{db}{dt}$ = Velocity of car B = 13 ft/s

b = Distance car B travels = ft

c = Distance between A and B after 4 seconds = √(a²+b²) = √(21²+28²) = √1225 ft

From Pythagoras theorem

a²+b² = c²

Now, differentiating with respect to time

$2a\frac{da}{dt}+2b\frac{db}{dt}=2c\frac{dc}{dt}\\\Rightarrow a\frac{da}{dt}+b\frac{db}{dt}=c\frac{dc}{dt}\\\Rightarrow \frac{dc}{dt}=\frac{a\frac{da}{dt}+b\frac{db}{dt}}{c}\\\Rightarrow \frac{dc}{dt}=\frac{21\times 9+28\times 13}{\sqrt{1225}}\\\Rightarrow \frac{dc}{dt}=15.8\ ft/s$

∴ Rate at which distance between the cars is increasing three hours later is 15.8 ft/s

6 0

4 years ago

What is oscillating to form a light wave?

aniked [119]

I think the answer is B ( matter )

5 0

3 years ago