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3 years ago

7

Which statement provides a complete scientific discription of an object in motion?

2 answers:

Alekssandra [29.7K]3 years ago

7 0

Question: which statement provides a complete scientific discription of an object in motion?

Answer: the marble moved 30 cm north in 6 seconds.

Explanation: motion is a change in position of an object over time an object's motion cannot change unless it is acted upon by a force

question answered by

(jacemorris04)

Nady [450]3 years ago

5 0

Hi there!

Question - Which statement provides a complete scientific discription of an object in motion?

Answer - The marble moved 30cm. north in 6 seconds.

Why - A scientific description of a object in motion is basically a description describing the exact direction the object is going like west, east, north, and south.

And I had this exact same quiz.

Hope This Helps :)

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You push on a 30 kg box with a force of 120 N. What is the acceleration of the box2

kumpel [21]

Answer:

6

Explanation:

120/30=6

8 0

3 years ago

In reaching her destination, a backpacker walks with an average velocity of 1.20 m/s, due west. This average velocity results, b

GaryK [48]

Answer:

$x_2 = 648.46\ m$

Explanation:

given,

Average velocity due west = 1.20 m/s

case 1

Distance moved in west, x₁ = 5.63 km

speed due west, v₁ = 2.33 m/s

Case 2

Distance moved in east = x₂

speed due east, v₂ = 0.374 m/s

total distance = x₁ + x₂ = 5.62

total time = t₁ + t₂ = 5630/2.33 + x₂/0.374

now,

$average\ velocity = \dfrac{total\ distance}{total\ time}$

$-1.20= \dfrac{-5630 + x_2}{\dfrac{5630}{2.33}+\dfrac{x_2}{0.374}}$

negative sign is used because we want the distance in east but velocity is in west.

$- 2900 - 3.21 x_2 = -5630 + x_2$

$-4.21 x_2 = -2730$

$x_2 = 648.46\ m$

The distance she walked in east is equal to 648.46 m

7 0

3 years ago

Which of the following is an example of changing momentum?!

ExtremeBDS [4]

Answer:

B!!!

Explanation:

5 0

3 years ago

Read 2 more answers

How much heat must be removed from 200 pounds of blanched vegetables at 189 degrees F to freeze them to a temperature of 22 degr

Virty [35]

To solve this problem it is necessary to apply the concepts related to heat exchange in the vegetable and water.

By definition the exchange of heat is given by

$Q =mc\Delta T$

where,

m = mass

c = specific heat

$\Delta T$ = Change in temperature

Therefore the total heat exchange is given as

$\Delta Q = Q_w+Q_v$

$\Delta Q = m_wc_w(T_i-T_f)+m_vc_v(T_i-T_f)$

Our values are given as,

Total mass is $M_T$ = 200lb ,however the mass of solid vegetable and water is given as,

$m_v= 0.4*200lb = 80lb$

$m_w=0.6*200lb=120lb$

$T_i = 183\°F\\T_f = 22\°F\\c_w = 1Btu/lbF\\c_v = 0.24Btu/lbF$

Replacing at our equation we have,

$\Delta Q = m_wc_w(T_i-T_f)+m_vc_v(T_i-T_f)$

$\Delta Q = (120)(1)(183-22)+(80)(0.24)(183-22)$

$\Delta Q = 22411.2Btu$

Therefore the heat removed is 22411.2 Btu

6 0

3 years ago

what is the energy required to melt down a 12,400g Gold bar assuming its temperature goes from 23c to 1,064c

sergejj [24]

1665183.6J

Explanation:

Given parameters:

Mass of Gold = 12400g

Initial temperature = 23°C

Final temperature = 1064°C

Unknown:

Energy required to melt = ?

Solution:

The amount of heat required to cause this temperature change to heat the gold bar is given as;

H = m c Ф

m is the mass of gold bar

c is the specific heat capacity of gold

Ф is the heat change

Specific heat capacity of gold = 0.129J/g°C

H = m c (Ф₂ - Ф₁)

H = 12400 x 0.129 x (1064 - 23) = 1665183.6J

learn more:

Specific heat capacity brainly.com/question/7210400

#learnwithBrainly

5 0

3 years ago