Physics Answers

An electric dipole consist of point charges q1=+12nC and q2= -12nC placed 10.0 cm apart. Compute the electric potential energy.

It is known that Earth is 81 times the mass of the moon. Show that the point of weightlessness between the earth and the moon for a spacecraft occurs at 9/10 of the moon. HINT: Me/b²=Mm/( a-b)²

Your father bought a car battery that has a terminal voltage of 12.6V for 75.0A, and 14.1V for 60.0A. What is the electromotive force and internal resistance of this car battery that your father bought?

The pumunary artery which connects the heart to the lungs has an inner radius of 2.6mm and is 8.5cm long. If the pressure drop between the heart and the lungs is 3*10³N/m², what is the average speed of blood in the pumunary artery? Determine volume flow rate of blood. Assume body temperature is 37°C and the coefficient of viscosity of blood is 4*10³ at 37°C

A tensile force of 200N applied to a steel wire of lenght 2m and cross sectional area 0.3mm³ extends it by 0.5cm. calculate the; 1). Tensile stress. 2). Tensile strain. 3). Young's modulus. 4). Strain energy. 5). Strain energy per unit volume.

Two objects of equal masses collide head-on while moving in the opposite direction and joined together. Show that the fractional loss of original kinetic energy of the objects is given by the expression; E=1/2+V1V2/V1²+V2²

a= 4i-2j-3k. b = 2i-j+6k. c=3i+j+k. Calculate 1). a+b+c. 2). a-b+2c. 3). do such that 2a-3b+D=0. 4). a.(b*c). 5). a*(bxc) 5). The angle between the vectors, a and b.

What is the time the particles is monetarily at rest using S = 2t³-3t²-5t

D= 7i + 9j - 4k

E= 8i + 9j + 5k

Calculate D × E

Find the angle between d and e

Show that D × E is perpendicular to both D and E

 A uniform electric field is directed to the right and has a magnitude of 8 N/C. Find the magnitude and direction of the force experienced by a 10 nC test charge placed in this field.