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3 years ago

What is the density of a rock with a mass of 10 grams and a volume of 5 ml

Physics

1 answer:

Talja [164]3 years ago

3 0

Density= mass/volume
So the answer is 2g/ml
Hope this helps!

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Suppose the green car was traveling at 0 miles the white car was traveling at 70 miles at the red car was trailing at 22 miles w

Elan Coil [88]

Answer:

The white car will cover the most distance every second.

Explanation:

The formula for the uniform speed of an object is given as follows:

$s = vt$

where,

s = distance covered by the object

v = speed of the object

t = time required

Now, if we assume time to be constant at 1 s. Then the distance covered by each car will be directly proportional to the speed of the car. Hence, the car with the greatest speed will travel the greatest distance in 1 second.

We, have:

Speed of white car > Speed of red car > Speed of green car

<u>Therefore, the white car will cover the most distance every second.</u>

5 0

3 years ago

What will happen if a crystal of ammonium nitrate is added to a supersaturated ammonium nitrate solution?

meriva

<span>When a supersaturated solution is disturbed, for example by adding further crystals of ammonium nitrate, crystals will form from the solute in the supersaturated solution.</span>

4 0

3 years ago

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A 75 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 24 m/s.

Vikentia [17]

Answer:

31.66 m/s

Explanation:

mass of player, M = 75 kg

mass of ball, m = 0.45 kg

initial velocity of player, U = + 4 m/s

initial velocity of ball, u = - 24 m/s

Let the final speed of player is V and the ball is v.

use conservation of momentum

Momentum before collision = momentum after collision

75 x 4 - 0.45 x 24 = 75 x V + 0.45 x v

289.2 = 75 V + 0.45 v .... (1)

As the collision is perfectly elastic, coefficient of restitution,e = 1

So, $e=\frac{v_{1}-v_{2}}{u_{2}-u_{1}}$

V - v = u - U

V - v = -24 - 4 = - 28

V = v - 28, put this value in equation (1), we get

289.2 = 75 (v - 28) + 045 v

289.2 = 75 v - 2100 + 0.45 v

2389.2 = 75.45 v

v = 31.66 m/s

Thus, the velocity of ball after collision is 31.66 m/.

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3 years ago

Calculate the kinetic energy of a 790-kg roller coaster traveling at a velocity of 20.7 m/s.

Leya [2.2K]

Answer:

The answer is 169253.55 joules

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3 years ago

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PLEASE HELP ME FAST!!

Mazyrski [523]

Answer:

Explanation:

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3 years ago