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Leno4ka [110]
3 years ago
13

Which are examples of projectile motion?

Physics
1 answer:
erastovalidia [21]3 years ago
4 0
I think C and D are the best way to describe projectile motion since both left the ground and stayed aloft for a small or large amount of time. A and B are example of motion but not projectile
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Two 84.5 g ice cubes are dropped into 30 g of water in a glass. If the water is initially at a temperature of 50 C and if the ic
Setler [38]

Answer:

final temperature will be 0 degree C

Total amount of ice will be

m_{ice} = 182 g

total amount of water

m_{water} = 17 g

Explanation:

After thermal equilibrium is achieved we can say that

Heat given by water = heat absorbed by ice cubes

so we will have

Heat given by water to reach 0 degree C

Q_1 = m_1s_1 \Delta T_1

Q_1 = 0.030(4186)(50 - 0)

Q_1 = 6279 J

heat absorbed by ice cubes to reach 0 degree

Q_2 = m_2 s_2 \Delta T_2

Q_2 = (0.169)(2100)(30)

Q_2 = 10647 J

so we will have

Q_2 > Q_1

so here we can say that few amount of water will freeze here to balance the heat

10647 - 6279 = mL

m = \frac{10647 - 6279}{335000}

m = 13 g

so final temperature will be 0 degree C

Total amount of ice will be

m_{ice} = 84.5 + 84.5 + 13

m_{ice} = 182 g

total amount of water

m_{water} = 30 - 13

m_{water} = 17 g

4 0
3 years ago
A roundabout in a fairground requires an input power of 2.5 kW when operating at a constant angular velocity of 0.47 rad s–1 . (
natita [175]

Answer:

Explanation:

Since the roundabout is rotating with uniform velocity ,

input power = frictional power

frictional power = 2.5 kW

frictional torque x angular velocity = 2.5 kW

frictional torque x .47 = 2.5 kW

frictional torque = 2.5 / .47 kN .m

= 5.32 kN . m

= 5 kN.m

b )

When power is switched off , it will decelerate because of frictional torque .

5 0
3 years ago
1. Ramon puts two magnetic toy trains very close to each other on a track. What will happen next, and
FrozenT [24]

Answer:

If one side of the train is positive and the other is negative they will attract if they are the same then they will repel.

Explanation:

If both are positive they will repel if both are negative they will repel and if they are opposites they will attract.

5 0
3 years ago
Read 2 more answers
How are scientific theories different than laws or hypotheses?
Gnoma [55]

Answer: Chilling with my homies

Chicken wings, Chicken wings

Hotdog and baloney

Chicken and macaroni

Chillin' wit mah homiiieees

Chicken wing chicken wing

Hot dogs and balogna

Chicken and macaroni

Chilling with mah Chilling with mah

Chicken chicken wing chicken chicken wing

Chicken chicken chicken chicken chicken wing

Chicken chicken chicken chicken wing

Chicken wings, Chicken wings

Hotdog and baloney

Chicken and macaroni

Chillin' wit mah homiiieees

Chicken wings, Chicken wings

Hotdog and baloney

Chicken and macaroni

Chillin' wit mah homiiieees homiiieeees

Chicken wings, Chicken wings

Hotdog and baloney

Chicken and macaroni

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Chillin' wit mah

Explanation:

im sorry i had to do it now pls give me brainliest thank u and have a blessed day:)

9 0
3 years ago
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What is the magnitude momentum of a 2 kg body that moves with a speed of 3 m/s? (1 point)
Naya [18.7K]

Answer:

<h2>D</h2>

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question

mass = 2 kg

velocity/speed = 3 m/s

We have

momentum = 2 × 3 = 6

We have the final answer as

<h3>6 kg.m/s</h3>

Hope this helps you

7 0
3 years ago
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