What are some advantages of using fuels from plants instead of using fossil fuels

Physics

1 answer:

wariber [46]4 years ago

3 0

Answer:

Plant based fuels comes form renewable source, can be grown anywhere and have lower carbon emissions as compared to fossil fuels. Bio fuels not only help a struggling economy by providing jobs but also helps in reducing greenhouse gases up to much extent by emitting less pollution.

Explanation:

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What happens to the temperature of a substance during a phase change?

german

During a phase change, the temperature remains constant. obviously all the heat is used in phase transformation.

8 0

3 years ago

An artillery shell is fired with an initial velocity of 300 m/s at 55.0° above the horizontal. It explodes on a mountainside 42.

GuDViN [60]

Answer:

x=7227

y=1678

(7227,1678)

Explanation:

Ok, check the picture I attached you, because of the problem don't give us aditional information, let's asume that the projectile is fired from an initial position x=0 and y=0. Now let's use projectile motion equations, but firs let's find the initial velocity components in x-axis and y-axis:

$v_ox=v_o*cos(\theta_o)=300*cos(55)=172.0729309m/s$

$v_oy=v_o*sin(\theta_o)=300*sin(55)=245.7456133m/s$

Now, let's find the x coordinate with this equation:

$x-x_o=x-0=x=v_ox*t=172.0729309*42=7227.063098m$

Finally asumming a gravity constant g=9.8, let's find the y coordinate with the next equation:

$y-y_o=y-0=y=v_oy*t-\frac{1}{2}*g*t^{2} =(245.7456133*42)-\frac{42^{2} *9.8}{2}$

$y=10321.31576-8643.6=1677.71576m$

8 0

3 years ago

A body of mass 5 kg is at rest what would be the magnitude of force which will make the body move with the velocity of 10 metre

kondor19780726 [428]

Answer:

===========100N is required force

5 0

3 years ago

The pressure at the bottom of a cylindrical container with a cross-sectional area of 45.5 cm2 and holding a fluid of density 420

iris [78.8K]

Answer:

3.33 m

Explanation:

Pressure is the distributed force applied to the surface of an object per unit area. The force is applied perpendicular to the surface of the object. The SI unit of pressure is N/m² or Pa.

Hydrostatic pressure is the pressure that a fluid exerts at a point due to the force of gravity.

The relationship between pressure on the bottom of the container, atmospheric pressure and the pressure due to the depth of the fluid is given by:

$P_{bottom}-P_{atm}=P_{depth}\\\\where\ P_{bottom}=pressure\ at\ the \ fluid\ bottom,\ P_{atm}=atmospheric\ pressure\\P_{depth}=pressure\ due\ to\ fluid\ depth=\rho gh. \ Hence:\\\\P_{bottom}-P_{atm}=\rho gh\\\\Given \ that\ P_{bottom}=115\ kPa=115*10^3\ Pa, let\ us\ assume\ P_{atm}=101\ kPa=101*10^3\ Pa,\rho=420\ kg/m^3,g=acceleration\ due\ to \ gravity=10\ m/s^2.\\\\Therefore:\\\\115*10^3-101*10^3=420*10*h\\\\14*10^3=4200h\\\\h=3.33\ m\\\\$