Please select the word from the list that best fits the definition

Weightlessness is experienced by an astronaut in space. This means that the astronaut's muscles have to be stronger to move his

just olya [345]

The answer is false. The speed of the astronaut cancels out the force of gravity, causing a 'stationary freefall'. While under these effects, it is not required for an astronaut to 'strengthen' his body.

4 0

4 years ago

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A student sets up an experiment to determine the inertial mass of a cart. The student has access to the following measurement eq

wlad13 [49]

Answer:

The correct answers are a and d

Explanation:

In this experiment it can be analyzed using Newton's second law

F = m a

m = F / m

The outside is supplied by the spring balance and is constant, therefore the acceleration of the system is also constant.

The acceleration can be found with the kinematic equations

x = v t + ½ a t²

As we start from rest the initial speed is zero

a = 2 x / t²

Therefore we need the reading of position and time.

Finally, the relationship between the balance reading and this acceleration of the mass of the system

Let's analyze the answers

a) True. It is one of the necessary quantities

b) False. With the equipment we cannot measure the speed directly

c) false. Acceleration is calculated

d) true. It is the other magnitude necessary for the calculation.

The correct answers are a and d

7 0

3 years ago

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A wave is incident on the surface of a mirror at an angle of 41° with the normal. What can you say about its angle of reflection

bazaltina [42]

Hold on 63 deg angle my friend

7 0

4 years ago

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Two 120 Ω resistors are connected in parallel across a supply voltage of 10 VDC. What's the current in this circuit?

german

As we know that here two 120 ohm resistors are connected in parallel with the battery of voltage 10 V DC

now here we will use Ohm's law

$V = i R$

so here we can use above equation to find the current in each resistor

$10 = i \times 120$

$i = \frac{10}{120}$

$i = 0.0833 A$

so here this will be the current flow through each resistor

now the total current through both resistors will be given as

$i_{total} = 0.0833 + 0.0833 = 0.167 A$

8 0

3 years ago

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The engineering quadrangle is approximately 235 meters above sea level. If the temperature is 15 degrees Celsius, is that above,

RUDIKE [14]

Answer:

The 15 ⁰C measured at this altitude is above the standard temperature for the altitude.

Explanation:

The standard temperature at sea level is 15 degrees Celsius. It decreases about 2 degrees C (or 3.5 degrees F) per 1,000 feet of altitude above sea level.

235 meters is equal to 771 feet.

Using the formula below, we can estimate temperature loss due to this change in altitude, that is 771 feet above sea level.

temperature loss = (3.5 x Change in altitude)/1000ft

temperature loss = (3.5 x 771ft)/1000ft = 2.7⁰F, (32 -2.7 = 29.3 ⁰F)

this is equivalent to 1.5⁰C temperature loss.

Thus, the standard temperature of the engineering quadrangle at 235 meters above sea level is 13.5 ⁰C.

Therefore, the 15 ⁰C measured at this altitude is above the standard temperature for the altitude.

7 0

4 years ago