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4 years ago

Currently, Earth's tilt is closest to _____.

Physics

2 answers:

zalisa [80]4 years ago

8 0

The answer is c. hope this helps.

il63 [147K]4 years ago

5 0

Earth's tilt is closest to 23.5<span>°. (C)</span>

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A small pebble and one large boulder start at the same height and begin rolling down the side of a mountain. Which object would

vitfil [10]

Answer:

The small pebble

Explanation:

Since the potential energy, P.E lost equals kinetic energy, K.E gained,

P.E = K.E

P.E = mgh = K.E

So, K.E = mgh where g = acceleration due to gravity and h = height of drop

Since h and g are constant

K.E ∝ m

So, the kinetic energy of the object is directly proportional to its mass. Thus, the object with the smaller mass has the lesser kinetic energy.

Since the object with the smaller mass is the small pebble, so the small pebble would have less kinetic energy as it crashes on the road at the bottom of the mountain.

8 0

3 years ago

A wheel of diameter 78 cm has an axle of diameter 14.8 cm. A force 150 N is exerted along the rim of the wheel.What force should

bezimeni [28]

Answer:

F = 263.51 N

Explanation:

given,

diameter of wheel = 78 cm

diameter of axle = 14.8 cm

Force exerted on the rim of wheel = 150 N

Force applied outside the axle = ?

To prevent rotation wheel from rotating the Force 'F' should be applied outside of the axle.

Net momentum about the center of mass should be zero

now,

Moment of about center due to 150 N = moment about center due to F on axle

$50\times \dfrac{78}{2}=F\times \dfrac{14.8}{2}$

7.4 F = 1950

F = 263.51 N

Hence, Force exerted outside of the axle in order to prevent the wheel from rotating is equal to 263.51 N.

6 0

4 years ago

How do remote sensitive satellites help people stay safe from massive fires

rodikova [14]

Satellites would be able to detect fires when they start and allow human monitors to review the information and issue warnings.

7 0

4 years ago

1. What are examples of muscle endurance activities/exercises? 2. Which sports require the most muscle endurance? 3. How many si

Komok [63]

Answer:

hello i need points i need to pass 8th grade

Explanation:

4 0

3 years ago

Read 2 more answers

A speed skater moving across frictionless ice at 10.0 m/s hits a 5.0 m wide patch of rough ice. she slows steadily, then continu

Charra [1.4K]

To calculate the acceleration of the skater on the rough ice, we use the equation

$v^2= u^2 + 2as$

Here, u is initial speed when she hits the patch of ice and its value is 10 m/s and v is final speed when she left the patch of ice and its value is given 7.0 m/s and s is the width of patch of ice and its value is 5.0 m.

Substituting these values in above equation we get,

$(7 m/s) ^2 = (10 m/s)^2 + 2 a \times 5.0 m \\\\ a = \frac{(70 - 100)(m/s)^2 }{ 10 m} = 3.0 m/s^2$ .

Thus, the acceleration of skater on the rough ice is $3.0 m/s^2$

3 0

3 years ago