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agasfer [191]
2 years ago
12

On a ceiling, there were tiny droplets of blood less than 1 mm in diameter. The victim was lying in a pool of blood. No other ma

rks were found on the other walls. Which best explains the sequence of events?
The victim was shot with a gun from behind and collapsed on the floor beneath.

The victim shot himself in the mouth.

The victim was stabbed with a knife.

The victim was hit in the head with a blunt object.
Physics
2 answers:
telo118 [61]2 years ago
8 0

Answer: "On a ceiling, there were tiny droplets of blood less than 1 mm in diameter." this can discard the knife theory.

"No other marks were found on the other walls" this is an interesting part, because usually a bullet would leave a mark in the walls or the ceiling, and this is not the case here, so we also could the "shot from behind"

"The victim was lying in a pool of blood". A hit in the head, actually could cause a hemorrhage, and maybe also could spread the tiny droplets of blood, because they have 1mm diameter, they are really tiny . But the second option is the really more likely, the only problem here is that there are no marks of a bullet in the ceiling.

mylen [45]2 years ago
3 0
I believe the correct answer from the choices listed above is the second option. The statement that would best explain the sequence of events would be that the <span> victim shot himself in the mouth. Hope this answers the question. Have a nice day.</span>
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A 10-meter long ramp has a mechanical advantage of 5. What is the height of the ramp?
denpristay [2]
<span><span>1.       </span>If the ramp has a length of 10 and has a mechanical advantage (MA) of 5. Then we need to find the height of the ramp.
Formula:
MA = L / H
Since we already have the mechanical advantage and length, this time we need to find the height .
MA 5 = 10 / h
h = 10 / 5
h = 2 meters

Therefore, the ramp has a length of 10 meters, a height of 2 meters with a mechanical advantage of 5.</span>



6 0
2 years ago
The block brake consists of a pin-connected lever and friction block at B. The coefficient of static friction between the wheel
ANTONII [103]

Answer:

B

Explanation:

7 0
2 years ago
Read 2 more answers
You traveled 150.meters south at a speed of 1.50m/s, and then traveled 600. Meters north at a rate of 2.00 m/s.
Jlenok [28]

Answer:

1.) 400s

2.) 1.875 m/s

3.) 1.125 m/s

Explanation:

Given that you traveled 150.meters south at a speed of 1.50m/s,

Time = distance/ speed

Substitute speed and distance into the formula

Time = 150/1.5

Time = 100 s

and then traveled 600. Meters north at a rate of 2.00 m/s.

Time = 600 / 2

Time = 300 s

1.) Total time = 100 + 300

Total time = 400 s

2.) The average speed will be total distance travelled over total time.

Total distance travelled = 150 + 600

Total distance travelled = 750 m

Substitute all the parameters into the formula

Average speed = 750/400

Average speed = 1.875 m/s

3.) Average velocity will be displacement over total time

Displacement = 600 - 150

Displacement = 450 m

Average velocity = 450/400

Average velocity = 1.125 m/s

6 0
2 years ago
You apply the brakes of your car abruptly and your book starts sliding off the front seat. Three observers sitting in the car ex
krek1111 [17]

Answer:

All the observers are correct.

Explanation:

This is simply a problem of reference frames from which the motion of the book is being viewed by the various observers.

From their various reference frames, they are all correct.

Observer A must be in the inertial reference frame.

<em>Observers who can explain the behavior of the book  and the car by using the relationship between the sum of  the forces and changing velocity are said to be observers in inertial reference frames.</em>

This is clearly shown by what observer A noticed. There was a relative motion between the book and the car as she pointed out, making her to be in an inertial reference frame.

<em>Similarly, observers in inertial reference frames can also explain the changes in velocity of objects  by considering the forces exerted on them by other objects.</em>

This is shown by observer B as he is able to notice how the force of the car affects the velocity of the book.

Observer C is actually in a non-inertial reference frame, as newtons law of force motion relationship are no longer observed. This occurs in the non inertial reference frame.

7 0
2 years ago
A piece of copper of mass 100 g is being drilled through with a 1/2" electric drill. The drill operates at 40.0 W and takes 30.0
lesantik [10]

Answer:

correct option is c. 31.0°C  

Explanation:

given data

copper of mass = 100 g

electric drill = 1/2"

power = 40.0 W

time = 30 s

C copper = 387 J/kgC

to find out

copper's increase in temperature

solution

we get here energy that is express a s

energy = 40 W × 30 s

energy = 1200 Watt seconds

and heat acquired by drill is here as

heat acquired = 100 × T × 387  

here temperature rise in copper mass as

temperature rise in copper mass = \frac{100}{1000} × T × 387

temperature rise in copper mass = 38.7 ×  T Watt second

we know that all the energy from the drill heats the copper

so we can say

38.7 ×  T = 1200

T = 31°C  

so correct option is c. 31.0°C  

4 0
2 years ago
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