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yarga [219]
1 year ago
15

An object is thrown upward with initial velocity of 30m/s at angle of 30 degree to the horizontal. calculate the components of t

he initial velocity.​
Physics
1 answer:
mel-nik [20]1 year ago
5 0

Answer:

Vo (vertical) = Vo sin 30 = 30 m/s / 2 = 15 m/s

Vo (horizontal) = Vo cos 30 = .866 30 m/s = 26 m/s

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4. Lead has a density of 11.5g/cm3. A rectangular block of lead measures 7cm ×5cm×2cm.
MArishka [77]

Answer:

a.) volume = 70cm^3

b.) mass = 805 grams

Explanation:

see the explanation in attachment.

6 0
3 years ago
Will mark as brailiest if correct!!!!!!!!!
ivolga24 [154]

Answer:

D.diamond

Explanation:

Refraction occurs due to the bending of light rays as they pass from one medium to another. The light rays bend as their speed changes as they pass from one medium to another. The more the speed changes, the more the light bends and therefore more refraction occurs. When light passes from air to the diamond, the speed of light decreases more than any of the other materials listed in the given choices. So the light rays slow down the most  diamond and so most refraction occurs in diamond.

5 0
3 years ago
Who is Tim peak where did he come from
Paul [167]
I believe you mean Tim Peake ? .Major Timothy Nigel "Tim" Peake CMG is a British Army Air Corps officer, European Space Agency astronaut and International Space Station crew member. 

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8 0
3 years ago
How long would it take a drag racer to increase her speed from 10m/s to 20 m/s if her car accelerates at a uniform rate of 15 m/
weeeeeb [17]

Answer:

t = 0.67 [s]

Explanation:

To solve this problem we must use the following kinematics equation.

v_{f} =v_{i} +(a*t)\\where:

Vf = final velocity = 20[m/s]

Vi = initial velocity = 10 [m/s]

a = aceleration = 15 [m/s^2]

Now replacing in the equation we have:

20 = 10 + (15*t)

t = (20-10)/15

t = 0.67 [s]

7 0
3 years ago
The sound intensity a distance d1 = 15.0 m from a chain saw is 0.260 W/m2. What is the sound intensity a distance d2 = 27.0 m fr
bagirrra123 [75]

Answer:

0.08024 W/m²

Explanation:

P = Power

d_1 = Distance = 15 m

I_1 = Intensity at 15 m = 0.26 W/m²

d_2 = Distance = 27 m

I_1 = Intensity at 27 m

Sound intensity is given by

I=\frac{P}{4\pi d^2}

\\\Rightarrow I\propto \frac{1}{d^2}

So, we have the relation

\frac{I_1}{I_2}=\frac{d_2^2}{d_1^2}\\\Rightarrow I_2=\frac{d_1^2\times I_1}{d_2^2}\\\Rightarrow I_2=\frac{15^2\times 0.26}{27^2}\\\Rightarrow I_2=0.08024\ W/m^2

The sound intensity at the given distance is 0.08024 W/m²

8 0
3 years ago
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