quize

The conversion of 15 inch into cm is?

• 38.1 cm

• 3.81 cm

• 381 cm

• 0.38 cm

The expression V=at is dimensionly ?

• correct

• not correct

• Probably correct

• Unspecified

The sum of two vectors A = ( 2 i + 2 j) and B = ( 2 i - 4 j) lying in XY plane

• ( 2 i - 4 j)

• ( 4 i - 2 j)

• ( 2 i + 4 j)

• (- 2 i - 4 j)

The scalar product of the two vectors A=( 3 i - 4 j) cm and B =( -2i + 3 j) cm is

• 18 cm

• 19 cm

• -18 cm

• -19 cm

Which of these examples belong to direct current?

• home single phase

• Car Battery

Determine the velocity of block 2 during the collision, at the instant block 1 is moving to the right with a velocity of 13.00 m/s

• 1.74 m/s

• 2.74 m/s

• -1.74 m/s

• -2.74 m/s

The mass density (also called just "density") of a substance is the ratio of its mass in kilograms to its volume in cubic meters. A piece of lead of mass 11.97 g has a volume of 1.05 cm³. Determine the density of lead in SI units.

• 11400 kg/m3

• 22500 kg/m3

• 25000 kg/m3

• 22500 kg

A cord is a volume of cut wood 8 ft long, 4 ft high, and 4 ft wide. Express this volume in cubic meters.

• 15.6 m3/kg

• 3.62 kg

• 5.62 m

• 3.62 m3

The SI unit for amount of substance is

• Kelvin

• mole

• Kilogram

• Candela

The reading of micrometer?

• 77.4 mm

• 7.74 mm

• 7.75 mm

• 0.775 mm