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skad [1K]
2 years ago
13

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

Physics
1 answer:
Dafna11 [192]2 years ago
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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Let the resistance of an electrical component remain constant while the potential difference across the two ends of the componen
slamgirl [31]

Answer:

The current through it will also decrease to half of its former value because according to Ohm's law the current flowing through a resistor is directly proportional to the potential difference applied across its ends provided that the temperature and some other necessary conditions remain constant.

This is mathematically represented as follows;

V=IR.........(1)

The current is thus given as

I=\frac{V}{R}..............(2)

if R is constant and V is reduced to half, then we have the following;

I=\frac{V/2}{R}

Simplifying further we obtain

I=\frac{V}{2R}...........(3)

Equation (3) shows that the current I is also reduced to half.

8 0
2 years ago
Read 2 more answers
a child hits a ball with a force of 350 N. (a) If the ball and bat are in contact for 0.12 is, what impulse does the ball receiv
Lina20 [59]

Explanation:

Given that,

Force with which a child hits a ball is 350 N

Time of contact is 0.12 s

We need to find the impulse received by the ball. The impulse delivered is given by :

J=F\times t\\\\J=350\times 0.12\\\\J=42\ N-m

So, the impulse is 42 N-m..

We know that he change in momentum is also equal to the impulse delivered.

So, impulse = 42 N-m and change in momentum =42 N-m.

7 0
3 years ago
Descriptive investigations involve collecting data about a system, but not making observations .
Angelina_Jolie [31]
The correct statement should be: Descriptive investigations involve collecting data about a system, but not making comparisons. 
so i believe the statement above is false

In descriptive investigations, we shall not make any hypothesis for the situation and we just need to fully record all obeservations.
By doing this, we could fully analyze the variables without comparing and manipulating it.

4 0
3 years ago
Read 2 more answers
MANY POINTS!!! PLZ! I NEED HELP!!!
liq [111]

Cetane rating of the diesel ensures the low temperature and uniform combustion. Centane number is just opposite to the octane number of petrol engine, cetane number of diesel determines at which temperature the diesel will going to autoignite.

8 0
3 years ago
Describe the role of the plasma membrane
lara31 [8.8K]
The plasma membrane of a cell is a group of lipids and proteins that forms the boundary between a cell's contents and the outside of the cell.
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