2 years ago

Will a 5g piece of platinum sink or float in water

1 answer:

5 0

A5 g object will sink until it displaces 5g of water. This behavior is independent of each object's size and shape. Water has a density of 1 g/cm3.

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A child has fallen while riding a bike. When should a bystander call 911 ?

kari74 [83]

Answer:

C Or D

Explanation:

The Child Should Get Checked On Before You Call The Police Thought,

4 0

2 years ago

Read 2 more answers

Consider a particle launched at a horizontal velocity v0 from a height h above the ground. 1. Derive an expression for the time

Rina8888 [55]

Answer: $t=\sqrt{\frac{2h}{g} }$

Explanation: The time taken by the object to reach the ground depends up on the vertical velocity of the object.

The object horizontal velocity component only moves the object in forward direction and does not have any effect vertically

as the object is launched horizontally its initial vertical velocity is zero

$u_y=0$

the object experiences downward fall due to gravitational acceleration only since there is no air resistance

therefore a=g

the distance covered =s=h

now the kinematic equation could be used

$h=u_yt+0.5at^2\\h=0+0.5gt^2\\h=\frac{gt^2}{2}\\t^2=\frac{2h}{g} \\t=\sqrt{\frac{2h}{g} }$

5 0

3 years ago

A player kicks a football from ground level with an initial velocity of 27.0 m/s, 30.0° above the

Gelneren [198K]

Answer:

Option B. 2.8 s

Explanation:

The following data were obtained from the question:

Initial velocity (u) = 27 m/s

Angle of projection (θ) = 30

Acceleration due to gravity (g) = 9.8 m/s²

Time of flight (T) =?

The time of flight of the ball can be obtained as follow:

T = 2uSineθ / g

T = 2 × 27 × Sine 30 / 9.8

T = 2 × 27 × 0.5 / 9.8

T = 27 / 9.8

T = 2.8 s

Therefore, time of flight of the ball is 2.8 s

7 0

3 years ago

An objects motion changes

NARA [144]

Answer:

uh finish the question please lol.

3 0

2 years ago

When a potential difference of 13 V is placed across a resistor, the current in the resistor is 1.4

vitfil [10]

Just divide the two numbers with each other.
I mean 13/1.4=9.2857...

8 0

2 years ago