3 years ago

0.2 points

Physics

1 answer:

Nutka1998 [239]3 years ago

7 0

The answer is 2.6m/s2

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You have to push a heavy box across three surfaces: a grassy field , ice rink, and a concrete playground. Which surface will be

alukav5142 [94]

Answer:

The ice rink because the ice is the surface with the lowest friction.

Explanation:

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3 years ago

Consider an airplane with a wing area of 240 ft2 , a span of 44 ft, an Oswald efficiency of 0.75, and a zero-lift drag coefficie

Darya [45]

Answer:

Drag force=1/2Cd*Area*density*V^2

A=240 ft^2

cd=0.75

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4 years ago

A cable passes over a pulley. Because the cable grips the pulley and the pulley has nonzero mass, the tension in the cable is no

topjm [15]

Answer:

$\alpha=214.8 rad/s^2$

Explanation:

We are given that

$F_1=137 N$

$F_2=43 N$

Net force=F= $F_1-F_2=137-43=94 N$

Mass,m=1.21 kg

Radius,r=0.723 m

We have to find the magnitude of its angular acceleration.

Moment of inertia , $I=\frac{1}{2}mr^2$

Substitute the values

Torque , $\tau=I\alpha$

$F_{net}\times r=\frac{1}{2}mr^2\alpha$

$\alpha=\frac{2F_{net}}{mr}$

$\alpha=\frac{2\times 94}{1.21\times 0.723}$

$\alpha=214.8 rad/s^2$

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3 years ago

A Carnot heat engine has an efficiency of 0.200. If it operates between a deep lake with a constant temperature of 293.0 K and a

Dimas [21]

Answer:

366 K

Explanation:

T₀ = Constant Temperature of deep lake = 293.0 K

T = Temperature of hot reservoir connected to carnot engine = ?

η = Efficiency of Carnot engine during the operation

Efficiency of Carnot engine is given as

$\eta = 1-\frac{T_{o}}{T}$

Inserting the values

$0.200 = 1-\frac{293.0}{T}$

T = 366 K

3 0

4 years ago

Describe liquids and GASSES IN TERMS OF THERE VOLUME AND SHAPES

antiseptic1488 [7]

Answer:

Explanation:

liquids have definite volume

liquids do not have definite shape. The take the shape of the container in which they are kept.

gases do not have definite volume.

gases do not have definite shape. They take the shape of the container in which they are kept.

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3 0

3 years ago

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