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sveta [45]
4 years ago
11

1.What is a medulla? What do forensic scientists use this for?

Physics
1 answer:
maxonik [38]4 years ago
4 0

A medulla is a group of cells that are going through hair, forensic scientist use it to find out the pigment, (color), and the shape.

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A wave is moving between two mediums, as shown in the diagram below. The
wariber [46]

Answer:

Uhm i think its a

Explanation:

srry if i get it wrong ._. my bad

3 0
3 years ago
A rope attached to a truck pulls a 180−kg motorcycle at 9.0m/s.The rope exerts a 400−N force on the motorcycle at an angle of 15
steposvetlana [31]

Answer:

115911.09915 J

Unchanged

Decreased

Explanation:

m = Mass of motorcycle = 180 kg

v = Velocity of motorcycle = 9 m/s

F = Force = 400 N

s = Displacement = 300 m

\theta = Angle above the horizontal = 15°

Work done is given by

W=Fscos\theta\\\Rightarrow W=400\times 300\times cos15\\\Rightarrow W=115911.09915\ J

The work done is 115911.09915 J

It can be seen that the force applied is constant so it does not matter if the speed of the motorcycle changes.

Tension on the rope would be

Fcos\theta-T=ma\\\Rightarrow T=Fcos\theta-ma

Work done

W=Ts\\\Rightarrow W=(Fcos\theta-ma)s

So, the work done would be reduced.

7 0
3 years ago
Which equation would you use to solve the following problem?
aivan3 [116]

The correct answer to the question is : C)The problem is asking to solve for work; W = F × d

EXPLANATION:

As per the question, the distance covered by the object d = 29 m.

The force that acts on the object is F = 289 N.

We are asked to choose the correct equation for work done.

Work is said to be done on a body or by a body if the applied force has a component along the direction of displacement.

Mathematically work done W = force × displacement

                                                  = F × d

As per the question, we are given distance covered and applied force.

Hence, the correct equation for calculating work done by the object is equation C.


6 0
3 years ago
Read 2 more answers
How far will the ball go before being caught one meter above the ground?
Reil [10]

Answer:

32 meters

Explanation:

Given:

x₀ = 0 m

y₀ = 1 m

y = 1 m

v₀ₓ = 18 cos 52° m/s

v₀ᵧ = 18 sin 52° m/s

aₓ = 0 m/s²

aᵧ = -9.8 m/s²

Find: x

First, find the time it takes for the ball to be caught.

y = y₀ + v₀ᵧ t + ½ aᵧt²

1 = 1 + 18 sin 52° t + ½ (-9.8) t²

0 = 14.2 t − 4.9 t²

0 = t (14.2 − 4.9 t)

t = 0 or 2.89

It takes 2.89 seconds to be caught.  The horizontal distance traveled in that time is:

x = x₀ + v₀ₓ t + ½ aₓt²

x = 0 + (18 cos 52°) (2.89) + ½ (0) (2.89)²

x = 32.1

Rounded to two significant figures, the ball travels 32 meters.

5 0
4 years ago
Read 2 more answers
Mechanical waves propagate or move through a medium because
lys-0071 [83]
The answer to that would be that 

they require so its mandatory for mechanical waves to travel through a medium
8 0
3 years ago
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