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vodomira [7]
2 years ago
5

A coin placed on the cover of a book just begins to move when the cover makes an angle of 38 degrees with the horizontal. What i

s the coefficient of static friction?
Physics
1 answer:
RSB [31]2 years ago
6 0

Answer:

m g sin theta = force of object along incline due to gravity

N μ = frictional of incline on object where N is the normal force

N = m g cos theta     force perpendicular to incline

m g sin theta = N μ = μ m g cos theta

μ  = tan theta = tan 38 = .78

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Umar GH
Ede4ka [16]

Answer:

An apple, potato, and onion all taste the same if you eat them with your nose plugged

Explanation:

3 0
3 years ago
Explain why increasing the temperature of a gas in a closed, rigid container causes the pressure in the container to increase.
exis [7]
The atoms/ particles that are in the gas have gotten energy from the heat, because of that, they zoom around the container, putting pressure on it :) hope it helps :)
8 0
3 years ago
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A vessel is filled with a liquid of density 1900 kg/m3 . There are two holes (one above the other) in the side of the vessel. Li
FromTheMoon [43]

Answer:

110 meters is the distance where they will intersect

Explanation:

given,

liquid density = 1900 kg/m³

distance of upper hole = 19 m

distance of lower hole = 117 m

acceleration due to gravity  = 9.8 m/s²

the speed at each point

v = \sqrt{2gh}  

for upper hole  v = \sqrt{2\times 9.8 \times 19}  

                         v  = 19.29 m/s

lower hole    v = \sqrt{2\times 9.8 \times 117}  

                          v = 47.88 m/s

The path for each is parabolic

x = v t

y = \dfrac{1}{2}gt^2  

y = \dfrac{1}{2}g(\dfrac{x}{v})^2  

y = \dfrac{gx^2}{2v^2}  

we get

upper hole

y = \dfrac{9.8\times x^2}{2\times 19.29^2}= 0.0132 x^2  lower hole

y= \dfrac{9.8\times x^2}{2\times 47.88^2}=0.00214x^2  y for upper hole = 80 + y for lower hole

0.0132 x^2= 98 + 0.00214 x^2

0.0082 x^2 = 98

x = 109.32 meters

110 meters is the distance where they will intersect

4 0
3 years ago
A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw
zaharov [31]

Answer:

The electric field points to the left because the force on a negative charge is opposite to the direction of the field.

Explanation:

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In an electric field, a negative charge has tendency to move from low to high potential and hence experience the electric force in the direction opposite to  electric field since electric field lines are directed from high to low potential.This phenomenon happened because The electric field from a positive charge will points away from the charge while the electric field from a negative charge will points toward the charge.

7 0
3 years ago
Tectonic plates often shift position by the force of liquid rock emerging from below the Earth’s surface and then cooling to for
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D.On the ocean floor. When tectonic plates move, They move along the ocean floor, which is the crust, and It causes earthquakes and volcanoes and also caused Pangea to break apart and become what it is now The seven continents.

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4 years ago
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