J physics 15

If the velocity ratio of a machine is 5. What is its ratio of x and y? [Velocity Ratio (V.R) = distance moved by the effort (x)÷ distance moved by the load (y)]

A motor boy of a driver saw what seem to appear to be a pool of water a head of him, while his driver’s drives a new truck on a funny day. Which of the following explains his observation?

The general gas law can be written as

A member of the crew of a SPACESHIP experiences weightlessness in a space when they

If an object which mass is 3kg moves in a circular path of a radius 0.7m, record a speed at 2m/s what is the result of the angular velocity?

Primary colours of light are

The device in which one circuit controls another, especially if the current in the second circuit is large or dangerous is known as

What is the magnitude of the couple which acts on a rotating circular disc of radius 2m, if a constant tangential force of 2N is responsible for the rotation.

Neutron were discovered by

The symbol \({}_{-1}^{0}X\) used to represent which of the particles?

Body floats in fluid when its …………………

Heat losses to the surrounding is possible through the following except

Electrons were discovered by

Boyle's law may be Witten as

In which of the following device in the expansion of solid is a disadvantages?

I. Simple pendulum

II. Fire alarms

III. Thermostat

IV. Bimetallic thermometer

A vector quantity can only be completely described when ……… and …………are mentioned.

Which of the following will increases the boiling point of water?I. Taking it to a high altitude

II. Dissolving a salt into it

III. Heating it in a sealed flask

IV. Increasing the rate of heat supply.

What is the inductance (L) of an inductor whose reactance is 1Ω at 50/π hertz (H)?

If a mango fruit dropped at a height of 50 meters. How long does it reach the ground? (take g = 10m/s²)

Quantities of heat Q can be measured using a container called

Lodestone is a natural magnet, it points at

The compressed regions and the space-out regions in longitude wave are refers to as

The external parts of an object can be measure accurately through the use of which scientific instrument?

A platinum resistance thermometer wire has a resistance of 70hms at 0°Cand 7.5 Ohms at 100°C. Calculate the temperature of the wire when the resistance is 7.2 Ohms

A stroboscope can be used to make the ware appear …………..

What is the S.I unit of relative density?

Radio waves belong to the class of wave whose velocity is about

The direction of the path taken by light is called

The two liquids which are often used in thermometer on experiment basic is known as

Calculate the gravitation force of attraction between two planets of 10²⁴kg and 10²⁷kg separated by a distance of 10²⁰meters.

The resultant force of a couple is ………?

If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s²)

If a ball released from a height of 20m, How long would it take the ball to reach the ground? (assures g = 10m/s)

A zinc has a heat capacity of 40 J/K, what is the mass of the zinc, given that the specific heat of zinc is 380 J/kg k

Mr. F. Abioye observed his image though a plane mirror, kept a distance way from him at 4.7m in his room at what distance is the image found from Abioye eye?

In an elastic collision
I. Energy is conserved

II. Energy is decreased

III. Energy is increased

IV. Linear momentum conversed

What type of electromagnetic radiation can be used to take photographs in the haze?

For a best result using temperature to achieve an accurate measurement, it is best to use

A radioactive source emits X–rays of very short wavelength (10^-13m ) what is the frequently of these rays?

Convert 45°C to kelvin

The optical instrument which is suitable for viewing a nearby objects is ………..?

At 35°C and 5 atmospheres pressure the density of a gas is 0. 600g per liter. What is the density at 7 atmospheric pressure and 350°C.

At what respective value of a, b, and c would the unit of work, the joule, be dimensionally similar to M^a L^b T^c?

What is the relationship mechanical advantage (MA) velocity Ratio (V.R) and efficiency with percentage?

If the volume of a gas is recoded as 76cm³ at a temperature of 27°C with a pressure of 800mmHg. What will be the volume of the gas at S.T.P?

The strength of an electromagnet increase with

Which of the following is not luminous object?

If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT?

A structural engineer stood on a top of a building releasing a light and heavy object to the ground which of the following statement is true?(Neglect Air Resistance)

If an object is placed at a height of tem above the ground at a stationary point. It posses what types of energy?