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Shtirlitz [24]
4 years ago
8

A boat floats because of which force?

Physics
1 answer:
prisoha [69]4 years ago
4 0
B is the answer  - buoyant force 
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A softball, of mass m = 0.195 kg, is pitched at a speed v0 = 25.3 m/s. Due to air resistance, by the time it reaches home plate
True [87]

Answer:

F = 1.0196N

Explanation:

To give this problem a solution, it is necessary to use the kinematic equations. The equation that describes velocity as a function of acceleration is given by,

v^2 = v_0^2 -2ax

Since there is a loss of 11.9%, in the final speed, that is to say that of the total speed, only 88.1% is the effective one, so

(25.3*88.1\%)^2=25.3^2-2a(13.7)

Re-arrange to find a,

a=-\frac{(25.3*88.1\%)^2-25.3^2}{2*13.7}

a=5.229m/s^2

Applying Newton's second law we have now that

F=ma

F = (0.195)(5.229)

F = 1.0196N

6 0
3 years ago
PHYSICS QUESTION: specific heat capacity
Sunny_sXe [5.5K]
1*10*1000=10000 energy= temp change*mass*specific heat capacity
4 0
3 years ago
The inner and outer surfaces of a 5m x 6m brick wall of thickness 30 cm and thermal conductivity 0.69 w/m.0 c are maintained at
Volgvan
The working equation to be used here is written below:

Q = kA(T₁ - T₂)/Δx
where
Q is the rate of heat transfer
k is the heat transfer coefficient
A is the cross-sectional area of the wall
T₁ - T₂ is the temperature difference between the sides of the wall
Δx is the thickness of the wall

The solution is as follows:

Q = (0.69 W/m²·°C)(5 m × 6 m)(50°C - 20°C)/(30 cm * 1 m/100 cm)
Q = 2,070 W/m

4 0
3 years ago
El valor más preciso de la masa de un electron es 9.11*10^-11kg ¿ Cuánto aumentaría la masa de un cuerpo que se carga con -1 c d
chubhunter [2.5K]

Answer:

m = 569.375\times 10^{6}\,kg

Explanation:

Un electrón tiene una carga negativa de 1.6\times 10^{-19}\,C y la masa total es igual al producto del número de electrones y esa carga unitaria. El número de electrones se obtiene al dividir la carga total por la carga unitaria. (An electron has a negative charge of 1.6\times 10^{-19}\,C and the total mass is equal to the product of the qunatity of electrons and such unit charge. The quantity of electrons is found by diving the total charge by the unit charge):

m = \frac{Q}{q} \cdot m_{e}

m = \left(\frac{1\,C}{1.6\times 10^{-19}\,C} \right)\cdot (9.11\times 10^{-11}\,kg)

m = 569.375\times 10^{6}\,kg

7 0
4 years ago
Define acceleration to show its scientific meaning
Damm [24]
Increase in speed or rate
8 0
3 years ago
Read 2 more answers
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