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3 years ago

HURRY!!!!

Physics

2 answers:

madam [21]3 years ago

7 0

Answer:

2. decreasing the distance of the space shuttle from Earth

Explanation:

To increase the gravitational force on a space shuttle, it is a good thing to decrease the distance of the space shuttle from the earth.

This is based on the Newton's law of universal gravitation which states that "the gravitational force between two bodies is a directly proportional to the product of their masses and inversely proportional to the square of the distance between them".

Mathematically;

F = $\frac{G m_{1} m_{2} }{r^{2} }$

G is the universal gravitation constant, it cannot be changed

m is the mass of the body

r is the distance

Since the distance is inversely proportional, is we reduce it, the value of the gravitational force will increase.

disa [49]3 years ago

5 0

Answer:

The answer is B

Explanation:

took the exam

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Water ______________ easier in the mountains because there is less air pressure.

m_a_m_a [10]

Answer:

water flows easier in the mountains because there is less air pressure.

6 0

3 years ago

Two identical masses are connected to two different flywheels that are initially stationary. Flywheel A is larger and has more m

inysia [295]

Answer:

a) True. There is dependence on the radius and moment of inertia, no data is given to calculate the moment of inertia

c) True. Information is missing to perform the calculation

Explanation:

Let's consider solving this exercise before seeing the final statements.

We use Newton's second law Rotational

τ = I α

T r = I α

T gR = I α

Alf = T R / I (1)

T = α I / R

Now let's use Newton's second law in the mass that descends

W- T = m a

a = (m g -T) / m

The two accelerations need related

a = R α

α = a / R

a = (m g - α I / R) / m

R α = g - α I /m R

α (R + I / mR) = g

α = g / R (1 + I / mR²)

We can see that the angular acceleration depends on the radius and the moments of inertia of the steering wheels, the mass is constant

Let's review the claims

a) True. There is dependence on the radius and moment of inertia, no data is given to calculate the moment of inertia

b) False. Missing data for calculation

c) True. Information is missing to perform the calculation

d) False. There is a dependency if the radius and moment of inertia increases angular acceleration decreases

4 0

4 years ago

How will heat flow between objects?

alukav5142 [94]

Without an external agent doing work, heat will always flow from a hotter to a cooler object. Two objects of different temperature always interact. There are three different ways for heat to flow from one object to another. They are conduction, convection, and radiation.

5 0

4 years ago

Read 2 more answers

I need help ASAP!!!! Here’s the question. Stephanie is going to buy an ice cream cone. She can pick a sugar cone or a waffle con

PolarNik [594]

Answer:

Six

Explanation:

Assuming she can only have ONE flavor in her cone

2 cone types * 3 flavors = 6 combos

7 0

2 years ago

At a department store, you adjust the mirrors in the dressing room so that they are parallel and 6.2 ft apart. You stand 1.8 ft

barxatty [35]

Answer:

a) 3.6 ft

b) 12.4 ft

Explanation:

Distance between mirrors = 6.2 ft

difference from from the mirror you face = 1.8 ft

a) you stand 1.8 ft in front of the mirror you face.

According to plane mirror rules, the image formed is the same distance inside the mirror surface as the distance of the object (you) from the mirror surface. From this,

your distance from your first "front" image = 1.8 ft + 1.8 ft = 3.6 ft

b) The mirror behind you is 6.2 - 1.8 = 4.4 ft behind you.

the back mirror will be reflected 3.6 + 4.4 = 8 ft into the front mirror,

the first image of your back will be 4.4 ft into the back mirror,

therefore your distance from your first "back" image = 8 + 4.4 = 12.4 ft

8 0

3 years ago