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Brrunno [24]
3 years ago
10

What is the density of an object that has a mass of 20kg and a volume of 4mL?

Physics
2 answers:
xxTIMURxx [149]3 years ago
7 0

mass over volume = 20/4 = 5 kg/mL

Ad libitum [116K]3 years ago
3 0

Answer:

\Huge \boxed{\mathrm{5 \ kg/ml}}

Explanation:

\sf \displaystyle density = \frac{mass}{volume}

\displaystyle \rho = \frac{m}{V}

The mass of the object is 20 kg.

The volume of the object is 4 ml.

\displaystyle \rho = \frac{20}{4}

\displaystyle \rho = 5

The density of the object is 5 kg/ml.

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What were two reasons that the Krystal Beslanowitch case was finally closed?
lesantik [10]

Answer:

1. Police Weren't Able To Find Any Real Leads

2. They Didn't Find Any Clues To The Killer Until 18 Years Later

Explanation:

It was unknown at the time, but it would go on to take 18 years for her killer to be arrested and tried for her death. The initial case went on from 1995 to 1997 but ended up closing when the police department was unable to find any real leads.

7 0
2 years ago
Which of these examples is NOT a functional group?
madam [21]

Answer: Salt

Explanation: Alkenes, esters, and salts are all functional groups either containing or being functional groups.

6 0
3 years ago
The elastic energy stored in your tendons can contribute up to 35%% of your energy needs when running. Sports scientists find th
zzz [600]

Answer:

11.16 J

Explanation:

Elastic energy (E) stored in the tendon is given by 1/2ke^2

SPRINTERS

k = 31N/mm = 31N/mm × 1000mm/1m = 31,000N/m

e = 41mm = 41mm × 1m/1000mm = 0.041m

E = 1/2 × 31,000 × 0.041^2 = 26.06J

NON-ATHLETES

k = 31,000N/m

e = 31mm = 31mm × 1m/1000 = 0.031m

E = 1/2 × 31,000 × 0.031^2 = 14.90 J

Difference = 26.06 J - 14.90 J = 11.16 J

4 0
3 years ago
21. A toy car starts from rest and begins to
Bond [772]

Answer:

v = 66 m/s

Explanation:

Given that,

The initial velocity of a car, u = 0

Acceleration of the car, a = 11 m/s²

We need to find the final velocity of the toy after 6 seconds.

Let v is the final velocity. It can be calculated using first equation of motion. It is given by :

v = u +at

v = 0 + 11 m/s² × 6 s

v = 66 m/s

So, the final velocity of the car is 66 m/s.

8 0
3 years ago
A pendulum in motion can either swing from side to side or turn in a continuous circle. The point at which it goes from one type
Ierofanga [76]

The kind of equation that can be used to differentiate the kind of separatrix that shows change on motion is

H = 2g/l.

<h3>What is simple pendulum?</h3>

A simple pendulum can be defined as the equipment that displays an oscillatory motion when a mass is tied on a rope and is suspended from it.

The various movements that occur using a simple pendulum is translational ( side to side) or continuous circle (oscillatory motion).

The equation that show that a change from one type of motion to another is H = 2g/l.

Learn more about motion here:

brainly.com/question/453639

#SPJ1

6 0
2 years ago
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