Physics Answers

A bullet, of mass 55.0g is fired at 251m/s toward a block of mass 7.50kg that is sitting on the floor. The bullet becomes embedded in the block and the block and bullet combination slides 0.755m along the floor before coming to rest. Determine the coefficient of kinetic friction between the block and the floor.

A crane lifts a 2.25x103N bucket containing 1.15m3 of soil (density 2.00x103kg/m3) to a height of 7.50m. Calculate the energy transformation (work) the crane performs.

Dancers have to learn many skills including how land correctly.A dancer of mass 50 kg leaps into the air and lands feet first on the ground .She lands on the ground with a velocity of 5metres per second.As she lands,she bends her knees and comes to a complete stop in 0,2 seconds.

A. calculate the momentum with which the dancer reaches the ground

B. Define impulse

C. Calculate the magnitude of the net force acting on the dancer as she lands​

Description:Two equal charges are separated 75cm apart in free air. Calculate the quantity of either charge if the force between them is 0.17N. What will be the quantity if the charges are situated in an insulating medium of dielectric constant= 10?

The radius of a Capillary tube 1S 0.04m. When placed in a Beaker cotaining Water, the through the Capilary tube by .05cm.Calculate the Coefficient of Surface Tension observed in the tube. Take g-10m/s

The resistance of the conductor is 20ohms at 20°C and 50ohms at 500°C. Calculate the resist of these conductor at 80°C

The temperature of 4.5kg of water is raised from 15 degrees to 100 degrees at constant atmospheric pressure. The specific heat capacity of water is 4.18kj/kgK. Determine the heat transfer required

Two horizontal plane mirrors with equal length, L = 1 m, are separated by a distance h. A laser light is incident from the left edge of the bottom mirror and makes an angle of 60° with the horizontal. The beam gets reflected five times from the top mirror before emerging from the right edge of the bottom mirror as shown below. What is the total distance covered by the laser between the two mirrors?

Two charges q1= 1.0 Coul and q2= 2.0 Coul are separated by

10.0 cm. At what point line joining the two charges is the electric field strength

is zero?

your grandmother have you a gold ring as a gift. the gold ring is 5mm thick and has an outside diameter of 12mm and an inside diameter of 11mm. the density of the gold is 1.09 x 10^4 kg/m^3

(a) what is the volume of the ring in cubic millimeter?

(b) what is the mss of the ring in grams?

(c) what is the market value of the ring if the price of gold is P1836.25 per gram?

(d) what is the volume of the ring in m^3?

(e) what is the mass of the ring in kg?