A car moves with an initial velocity of 25m/s and reaches a velocity of 45m/s in 10s. What is the acceleration of the car?

Which of the following can be used to measure accurately to three decimal places in centimeters?

Two forces of magnitude 7N & 3N act at right angles to each other.  The angle θ between resultant and the 7N force is given by

Conversion of temperature into electric voltage is done with

A force of 16N is applied to a 4kg block that is at rest on a smooth horizontal surface. What is the velocity of the block at t = 5s?

More than one thermocouple connected together. The connections may be series, parallel, or both.

A boat travels due east at a speed of 40m/s across a river flowing due south at 30m/s. What is the resultant speed of the boat?

A very massive object A and a less massive object B move toward each other under the influence of gravitation. Which force, if either, is greater?

What is the order of magnitude of the gravitational force between you and the person that sits next to you in class?

The resultant of two forces acting on an object is maximum when the angle between them is

One joule of work is required to move one coulomb of charge from one point to another with no change in the velocity of the charged particles. Which of the following is true between the two points?

When an electron is moving  horizontally between oppositely charged plates, it will move in the

Two forces of magnitude 7N and 3N act at right angles to each other. The angle θ between resultant and the 7N force is given by

A body falls from rest to the ground in 0.5 secs. 
Calculate the height from which it falls. 
(g = 10m/s²)

Two divers G & H are at depths 20m & 40m respectively below the water surface in a lake. The pressure on G is P₁  while the pressure on H is P₂ . If the atmospheric pressure is equivalent to 10m of water, the value of P₂ /P₁ is

Persistence of vision is the principle behind?

A resistor is connected to a battery. If you replace the resistor with one that has twice the resistance, by what factor does the power dissipated in the circuit change?

Three resistors, with values of 47 Ω, 68 Ω, and 82 Ω, are connected in series with a 50-V dc generator, as shown in Fig. 4-12. The total power consumed by this network of resistors is: 

In the diagram below, what is the value of W?

Which of the following are scalar quantities?
I. Momentum
II. Energy
III. Mechanical advantage
IV. Thrust

Which of the following parameters manifests itself as a vector quantity?

In the figure below, the three forces F_{1 ,} F₂ & F₃ acting at O are in equilibrium. If the magnitude of F₁ is 10.0N and the magnitude of F₂ is 5.0N; find the magnitude of F₃

When playing billiards, the collisions between the balls are best described as __________________.

What is the ratio between the gravitational force: electrostatic force between 2 electrons?

The rated emf (voltage) of a battery is 12 volts. When the battery delivers a current of 0.5 A to a load, the potential difference between the terminals of the battery is 10 V. The internal resistance of the battery is

Which among the following order of decreasing wavelengths of electromagnetic waves is correct?

I. Radio waves  
II. Infrared rays   
III. Visible Light  
IV. X-Rays  

A source delivers 12 V and the current is 777 mA. Then the best expression for the resistance is

When a paint brush is removed from clean water, the bristles of the brush are pulled together because of

A rectangular tank contains water to the depth of 2m. If the base is 4m x 3m, calculate the force on the base ( density of water = 1000kg/m³, g = 10m/s²)

A circuit must have which of the following?

Mechanical pumps cannot

Electric cords connected to equipment may be used for raising or lowering the equipment.

If charge stored on plates of capacitors is large, then capacitance will be

An object of mass 20kg slides down an inclined plane at an angle of 30° to the horizontal. The coefficient of static friction is

What is the fourth step of the troubleshooting procedure?

A block of mass 50kg is given an initial speed of 5m/s on a rough horizontal floor. If it slides on the floor for 3m before it stops, calculate the coefficient of kinetic friction between the block and the floor. (g = 10m/s²)

The term torque means...

A steady flow of water passes along a horizontal tube from a wide section X to the narrower section Y. Manometers are placed at P & Q as shown below. Which of the statements is correct?

What is current?

According to Kepler, a planet will travel fastest in its orbit when _____________.