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horsena [70]
3 years ago
13

The mass of a substance was found to be 8.2 g. By using the water displacement method the volume was found to be 3.6 cm3. Calcul

ate the density
Physics
2 answers:
Tatiana [17]3 years ago
6 0

Answer:

D= 2.3g/ml

Explanation:

Vikki [24]3 years ago
5 0
D= M/V

D=8.2/3.6

D= 2.3g/ml
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A crate is given a big push, and after it is released, it slides up an inclined plane which makes an angle 0.52 radians with the
vovangra [49]

Answer:

a = 8.951 m/s²

Explanation:

given,

angle = 0.52 radians

μ_s = 0.84

μ_k = 0.48

acceleration = ?

using

F +  f = m a

mg sin θ +  μk mg cos θ = m a

a = g sin θ  + μk g cos θ

a = 9.8 x  sin 0.52 + 0.48 x 9.8 x  cos 0.52

a = 4.869 + 4.082

a = 8.951 m/s²

the magnitude of acceleration is a = 8.951 m/s²

8 0
3 years ago
State Pascal''s principle. Give and example of its use
BabaBlast [244]
Well, it is also known as the transmission of fluid pressure. So, it is a principle in fluid mechanics that says that pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid such as the the pressure variations.
4 0
4 years ago
Answer this plsss<br> A mobile phone operates at 900 MHz. <br> What wavelength does it use?
Aleks [24]

Answer:

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7 0
3 years ago
A uniform ladder of length l rests against a smooth, vertical wall. If the coefficient of static friction is 0.50, and the ladde
Ronch [10]

Answer:

X = 5.44 m

Explanation:

First we can calculate the normal force acting from the floor to the ladder.

W₁+W₂ = N  

W1 is the weigh of the ladder

W2 is the weigh of the  person

So we have:

m1g+m2g=N  

N=755.37 N

The friction force is:

F_{force}=\mu N=0.5\cdot 755.37=377.68 N

Now let's define the conservation of torque about the foot of the ladder:

\tau_{ledder}+\tau_{person=\tau_{reaction}}

m_{1}\cdot g\cdot X \cdot cos(53)+m_{2}\cdot g\cdot 3.75 \cdot cos(53)=F_{force}7.5sin(53)

Solving this equation for X, we have:

X = \frac{377.68\cdot 7.5\cdot sin(53)-21\cdot 9.81\cdot 3.75 \cdot cos(53)}{56\cdot 9.81\cdot cos(53)}

Finally, X = 5.44 m

Hope it helps!

3 0
3 years ago
A 6,200g man runs at a speed of 125m / s. Find the kinetic energy of the running man.
dlinn [17]
Kinetic energy has a formula
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3 years ago
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