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omeli [17]
2 years ago
4

A tub of water is filled with an Initial (starting) volume of 100 L. A toy is placed in the tub and the water level rises to 115

L. The toy has a mass of 15 kilograms. What is the density of the toy in Kg/L?
I was told it was 1, can someone please explain why that is?
Physics
1 answer:
Anastaziya [24]2 years ago
7 0

Answer:

1 kg/l

Explanation:

Density is defined as mass per unit volume of an object and expressed as d=m/v

Where m is the mass, v is the volume and d is the density.

Given the mass of toy as 15 kg, the volume is given by getting the differences between the final and initial reading of tge tub, since tgis is the volume that the object displaces.

The volume will be 115-100=15 liters.

Now, substituting 15 kg for m and 15 l for v, the density will be

D=15/15=1 kg/l

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What is the kinetic energy of a 26 kg eagle flying at an altitude of 65 m at a speed of 19 m/s?
sweet [91]

Answer:

4693 J

Explanation:

The kinetic energy of the eagle is given by:

K=\frac{1}{2}mv^2

where

m is the mass of the eagle

v is the speed of the eagle

In this problem, m = 26 kg and v = 19 m/s. Substituting into the formula, we find

K=\frac{1}{2}(26 kg)(19 m/s)^2=4693 J

As we can see, the altitude of the eagle is not relevant for the calculation of the kinetic energy.

4 0
2 years ago
What is the advantage of the SI unit over CGS units?
MatroZZZ [7]

Answer:

The advantage of the SI unit over CGS unit are:

  • S.I has broader base. It has seven base units and two supplementary units.
  • S.I is metric.
  • S.I is coherent.
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8 0
2 years ago
Xander's friend Corey has a skateboard that he rides at Newton's Skate Park.
DanielleElmas [232]

Answer:

0.5 m/s2

Explanation:

Step 1:

Data obtained from the question.

Total Mass = 60Kg

Net force = 30N

Acceleration =?

Step 2

Determination of the acceleration.

Force = Mass x Acceleration.

With the above equation, we can easily obtain the acceleration as follow:

30 = 60 x Acceleration

Divide both side by 60

Acceleration = 30/60

Acceleration = 0.5 m/s2

Now, we can thus say that the acceleration at that moment is 0.5 m/s2

8 0
2 years ago
Duane skis down a hill at an angle of 42°. He has a mass of 92 kg. What is the normal force on Duane?
Sindrei [870]
Normal force=m*g*cos theta
normal force=92kg*9.8m/s^2*cos 42
normal force=670 N
7 0
2 years ago
Read 2 more answers
A gas is compressed in a cylinder from a volume of 20.0 l to 2.0 l by a constant pressure of 10.0 atm. calculate the amount of w
jok3333 [9.3K]
First, we need to convert the pressure in SI units. Keeping in mind that 1 atm = 1.01 \cdot 10^5 Pa:
p=10.0 atm =1.01 \cdot 10^6 Pa

The initial and final volume of the gas are (keeping in mind that 1.0 L = 0.001 m^3):
V_i = 20.0 L=0.020 m^3
V_f = 2.0 L=0.002 m^3

So, the work done on the gas by the surrounding is
W= -p \Delta V=-p(V_f-V_i)=-(1.01 \cdot 10^6 Pa)(0.002 m^3-0.020 m^3)=18180 J
And the final positive sign means that this work corresponds to an increase in internal energy of the gas.
8 0
2 years ago
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