₦airaland Forum

Timijo:
These ones are Physics questions can anyone solve them
1. A bullet of mass 20g travelling horizontally at 100m/s, embeds itself in the centre of a block of
wood 1kg which is suspended by light vertical string 1m, calculate the velocity

Timijo:
Please I someone to solve this question.
3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3
standard flask. 25cm3
of this solution required 40.00cm3
of 0.01M HCl for neutralization. What is the
percentage by weight of k2CO3 in the mixture? (k = 39, O = 16, C = 12)

Timijo:
2. A car moving with a velocity of 20m/s at 30o
to the horizontal, what is the components of the
velocity along the horizontal.2. A car moving with a velocity of 20m/s at 30o
to the horizontal, what is the components of the
velocity along the horizontal

Timijo:
2. A car moving with a velocity of 20m/s at 30o
to the horizontal, what is the components of the
velocity along the horizontal.2. A car moving with a velocity of 20m/s at 30o
to the horizontal, what is the components of the
velocity along the horizontal

Timijo:
These ones are Physics questions can anyone solve them
1. A bullet of mass 20g travelling horizontally at 100m/s, embeds itself in the centre of a block of
wood 1kg which is suspended by light vertical string 1m, calculate the velocity

Timijo:
2. A car moving with a velocity of 20m/s at 30o
to the horizontal, what is the components of the
velocity along the horizontal.

CodeTemplar:
17.32m/s

CodeTemplar:
1.9607 m/s

Danny4show:
Your horizontal component is given as Ux= UCos30 = 20Cos30 = 17.3m/s

Timijo:
These ones are Physics questions can anyone solve them
1. A bullet of mass 20g travelling horizontally at 100m/s, embeds itself in the centre of a block of
wood 1kg which is suspended by light vertical string 1m, calculate the velocity



M1V1 + M2V2=V(M1+M2)


20/1000(100) + 1(0)=V(20/1000 + 1)


2=51V/50


V=100/51m/s


V=1.961m/s

Timijo:
Please I someone to solve this question.
3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3
standard flask. 25cm3
of this solution required 40.00cm3
of 0.01M HCl for neutralization. What is the
percentage by weight of k2CO3 in the mixture? (k = 39, O = 16, C = 12)

Timijo:
Please I someone to solve this question.
3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3
standard flask. 25cm3
of this solution required 40.00cm3
of 0.01M HCl for neutralization. What is the
percentage by weight of k2CO3 in the mixture? (k = 39, O = 16, C = 12)

xharles15:
N1 V1 = N2 V2
N1=?
V1=25cm3
N2=0.01M
V2=40 cm3
N1 = (N2 X V2) / V1
=(0.01 X 40) / 25
=0.016M
Reacting mass of K2CO3 = Molarity X Molar mass
=0.016 X 138 = 2.208g
% composition = (2.208 / 3.000) X 100
=73.6%

Timijo:
Thanks.
Here is another one.
A 15kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 200N and breaks as the elevator accelerates. What was the elevator's minimum acceleration (in magnitude and direction)? Take g=10.0ms-2
THANKS SIR

Timijo:
Please I someone to solve this question.
3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3
standard flask. 25cm3
of this solution required 40.00cm3
of 0.01M HCl for neutralization. What is the
percentage by weight of k2CO3 in the mixture? (k = 39, O = 16, C = 12)

Timijo:
Thanks.
Here is another one.
A 15kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 200N and breaks as the elevator accelerates. What was the elevator's minimum acceleration (in magnitude and direction)? Take g=10.0ms-2
THANKS SIR