Description : During the motion of a projectile fired from the earth surface, ______. (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant
Last Answer : (4) horizontal component of its velocity remains constant Explanation: The motion of a projectile is a two-dimensional motion-Horizontal motion and vertical motion-that take place independent ... continuously affects the vertical component, so the vertical motion is a uniformly accelerated motion.
Description : During the motion of a projectile fired from the earth surface, _______ (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant
Last Answer : horizontal component of its velocity remains constant
Description : A bullet is fired with a muzzle velocity of 1000 meters per second from a rifle clamped to a window 4.9 meters above ground level. Neglecting air resistance, the horizontal distance from the rifle at which the bullet will strike the ground is w) 4.9 meters x) 500 meters y) 1000 meters z) 4900 meters
Last Answer : ANSWER: Y -- 1000 METERS
Description : A projectile is fired into the air at an angle of 23 degrees. At what other angle would this projectile have the same range if air resistance is neglected? w) 46 degrees x) 60 degrees y) 67 degrees z) 68 degrees
Last Answer : ANSWER: Y -- 67 DEGREES
Description : The kinetic energy of a stone falling near the earth's surface through a vacuum increases with the: w) square root of its velocity x) cube root of its velocity y) square of its velocity z) cube of its velocity
Last Answer : ANSWER: Y -- SQUARE OF ITS VELOCITY
Description : A ball is thrown horizontally from the top of a cliff. Assuming no air resistance, the acceleration of the ball while it is in flight is: w) in the vertical direction only x) in the horizontal direction only y) in the vertical and horizontal directions z) zero.
Last Answer : ANSWER: W -- IN THE VERTICAL DIRECTION ONLY
Description : A 5 kilogram mass is lifted at constant velocity from a shop floor by a rope that passes through a pulley attached to the shop's ceiling. Neglecting the mass of the rope and friction in the pulley, what is the approximate tension in the rope? w) 100 newtons x) 50 newtons y) 25 newtons z) 5 newtons
Last Answer : ANSWER: X -- 50 NEWTONS
Description : Assuming all other parameters remain constant, what happens to the pressure of a gas when the volume of the gas is increased? w) increases x) decreases y) fluctuates sinusoidally z) remains the same
Last Answer : ANSWER: X -- DECREASES
Description : Assuming constant gravity and no air resistance, the path of a cannonball fired from a cannon is: w) a semi-circle x) an ellipse y) a parabola z) a hyperbola
Last Answer : ANSWER: Y -- A PARABOLA
Description : As a pendulum is raised to higher altitudes, its period: w) increases x) decreases y) remains the same z) decreases, then remains the same
Last Answer : ANSWER: W -- INCREASES
Description : A constant potential difference is applied across the plates of a parallel-plate capacitor. Neglecting any edge effects, the electric field inside the capacitor is: w) constant x) varying as one over r squared y) decreasing as one moves from the positive to the negative plate z) zero
Last Answer : ANSWER: W -- CONSTANT
Description : Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid: w) increases x) decreases y) stays the same
Description : An ELECTRON moving horizontally along the +x axis enters a region of space with a horizontal uniform magnetic field pointing in the +y direction. The electron will be deflected: w) -y direction x) +y direction y) -z direction z) +z direction
Last Answer : ANSWER: Y -- -Z DIRECTION
Description : Which of the following statements is TRUE about an ELASTIC collision between two particles? Is it true that: w) neither particle loses any of its kinetic energy x) neither particle loses any of ... that lost by the other z) the total kinetic energy before and after the collision remains constant
Last Answer : ANSWER: Z -- THE TOTAL KINETIC ENERGY BEFORE AND AFTER THE COLLISION RE
Description : A capacitor and a coil are connected in series. The capacitor is charged and allowed to discharge through the coil. The current that will then flow through the capacitor-coil combination will do ... but diminish steadily to zero z) oscillate at high frequency at first but then at slower frequency
Last Answer : ANSWER: Y -- OSCILLATE BUT DIMINISH STEADILY TO ZERO
Description : If water is warmed from 0 degrees Celsius to 6 degrees Celsius, which of the following things happen. Will the water: w) expand steadily x) contract steadily y) expand at first and then contract z) contract first then expand
Last Answer : ANSWER: Z -- CONTRACT FIRST THEN EXPAND
Description : If a metallic object is heated, its density generally: w) increases x) decreases y) fluctuates randomly z) remains the same
Description : A 10 kilogram mass rests on a horizontal frictionless surface. A horizontal force of 5 Newtons is applied to the mass. After the force has been applied for 1 second, the velocity of the mass is: w) 0 meters per second x) 0.5 meters per second y) 5 meters per second z) 50 meters per second
Last Answer : ANSWER: X -- 0.5 METERS PER SECOND
Description : An object dropped from rest near the Earth's surface will fall how far in the first second: w) 4.9 meters x) 9.8 meters y) 16.0 meters z) 32 meters
Last Answer : ANSWER: W -- 4.9 METERS
Description : A block of wood initially at rest slides down an inclined plane. Neglecting friction, the kinetic energy of the block at the bottom of the plane is: w) all converted into heat x) equal to its ... kinetic energy at the top of the plane z) dependant on the materials of which the block is made
Last Answer : ANSWER: X -- EQUAL TO ITS POTENTIAL ENERGY (WITH RESPECT TO THE BOTTOM OF PLANE) WHEN IT WAS AT THE TOP OF THE PLANE.
Description : An organ pipe which is open at both ends resonates at its fundamental frequency. Neglecting any end effects, what wavelength is formed by this pipe in this mode of vibration if the pipe is 2 meters long? w) 2 meters x) 4 meters y) 6 meters z) 8 meters.
Last Answer : ANSWER: X -- 4 METERS
Description : An object is projected vertically upward near the surface of the earth. At the very top of its path, the object's velocity is zero, and its acceleration is: w) 0 x) 9.8 meters per second squared DOWNWARD y) 9.8 meters per second squared UPWARD z) depends on the mass of the object
Last Answer : ANSWER: X -- 9.8 METERS PER SECOND SQUARED DOWNWARD
Description : A freight car weighing 20 tons and moving at a speed of 7 miles per hour on a horizontal track collides and couples with a stationary car that weighs 15 tons. Neglecting friction, determine the velocity of the coupled cars.
Last Answer : ANSWER: 4 MILES PER HOUR
Description : A projectile is fired at an angle to the vertical. Its horizontal range will be maximum when is (A) 0° (B) 30° (C) 45° (D) 60°
Last Answer : (C) 45°
Description : As the ball falls towards the ground, its velocity A. increases B. decreases C. remains constant D. becomes zero
Last Answer : increases
Description : By increasing the current, the drift velocity A. decreases B. increases C. remains constant D. becomes zero
Last Answer : remains constant
Description : Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid: (1) increases (2) decreases (3) stays the same (4) none of the above
Last Answer : (1) increases
Description : In general, as you move across a period (left to right) electronegativity: w) increases x) decreases y) remains the same z) increases or decreases
Description : In general, as you move down a family the ionization energy: w) increases x) decreases y) remains the same z) increases or decreases
Description : As the temperature of the air increases from 0 degrees C to 20 degrees C, the wavelength of a sound made by a tuning fork of fixed frequency does which of the following? Does the wavelength w) increase x) decrease y) remain the same z) increase up to a maximum, then remain constant
Last Answer : ANSWER: W -- INCREASE
Description : As you go up a mountain top, your weight: w) increases slightly x) decreases slightly y) remains exactly the same.
Last Answer : ANSWER: X -- DECREASES SLIGHTLY
Description : When a detergent is added to pure water, its surface tension – (1) increases (2) decreases (3) remains constant (4) becomes infinite
Last Answer : (2) decreases Explanation: When Soaps and detergents are added to water, they weaken the strength of the skin on the water's surface due to surface tension by interfering with hydrogen bonding ... of the soap or detergent is also attracted to the water, thereby decreasing the surface tension.
Description : When a detergent is added to pure water, its surface tension (1) increases (2) decreases (3) remains constant (4) becomes infinite
Last Answer : decreases
Description : Imagine that a 20 mile diameter hole is bored along the diameter of the Earth extending from the North Pole to the South Pole, that all air and gases are pumped out of this hole, and that the temperature ... between the loci of the hole with the opposite surfaces of the Earth. z) none of the above.
Last Answer : ANSWER: Y -- FOREVER OSCILLATE IN SIMPLE HARMONIC MOTION ALONG THE OLE
Description : The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration. (A) Rate (B) Pressure (C) Both (A) & (B) (D) Neither (A) nor (B
Last Answer : (C) Both (A) & (B)
Description : Which of the following statement is false? a.The potential energy of a particle has the form Ep = k2x. The force acting on the particle is constant (k is a constant) b.The linear velocity of ... zag path while ascending a steep hill e.The density of milk decreases when cream is taken out of milk
Last Answer : e. The density of milk decreases when cream is taken out of milk
Description : Projectile will attain its maximum range, if it is fired at an angle of A. 30° B. 47° C. 90° D. 45°
Last Answer : 45°
Description : For a symmetrical two hinged parabolic arch, if one of the supports settles horizontally, then the horizontal thrust (A) Is increased (B) Is decreased (C) Remains unchanged (D) Becomes zero
Last Answer : (B) Is decreased
Description : A car is moving along a straight horizontal road at a speed of 20 meters per second. The brakes are applied and a constant force of 5000 Newtons decelerates the car to a stop in 10 seconds. The mass of the car is: w) 1250 kilograms x) 2500 kilograms y) 5000 kilograms z) 10,000 kilograms
Last Answer : ANSWER: X -- 2500 KILOGRAMS
Description : The velocity of the liquid flowing through the divergent portion of a Venturimeter (A) Remains constant (B) Increases (C) Decreases (D) Depends upon mass of liquid
Last Answer : Answer: Option C
Description : When an atom undergoes beta decay, the atomic number of the nucleus: w) is unchanged x) increases by one y) decreases by one z) none of the above
Last Answer : ANSWER: X -- INCREASES BY ONE
Description : Two hockey pucks, of unequal mass and connected by a spring of negligible mass, rest on a horizontal frictionless surface. The spring is released, and the pucks move apart. The center of mass of ... the direction of the greater mass y) remain stationary z) move in the direction of the smaller mass
Last Answer : ANSWER: Y -- REMAIN STATIONARY
Description : Which of the following phrases completes the following statement: The strength of the electric field between two oppositely charged parallel plates is: w) a maximum midway between the plates x) a maximum ... plate y) constant between the plates except near the edges z) zero midway between the plates
Last Answer : ANSWER: Y -- CONSTANT BETWEEN THE PLATES EXCEPT NEAR THE EDGES
Description : Close inspection of a failed metal part reveals artifacts on the fracture surface commonly referred to as "striations" or "beach marks". This indicates the component failed as a result of: w) Sudden overloading x) Cyclical loading y) Stress corrosion cracking z) None of the above
Last Answer : ANSWER: X -- CYCLICAL LOADING
Description : When the voltage remains constant, and the resistance increases in a series circuit, current flow _____________. A. decreases B. remains the same C. increases D. increases by the square
Last Answer : Answer: A
Description : When the voltage remains constant and the resistance is increased in a series circuit, the flow of current _____________. A. increases by the square of the original value B. increases C. remains the same D. decreases
Last Answer : Answer: D
Description : With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge (A) Increases (B) Decreases (C) Remains constant (D) Increases linearly
Last Answer : (A) Increases
Description : As you go down into a well, your weight: w) increases slightly x) decreases slightly y) remains exactly the same
Description : Which statement is correct for muscle contraction? (a) Length of H-zone decreases. (b) Length of A-band remains constant. (c) Length of I-band increases. (d) Length of two Z-line increases.
Last Answer : (b) Length of A-band remains constant.
Description : Which of the following statements dealing with simple harmonic motion of a mass-spring system is TRUE? w) The acceleration is largest when the oscillating mass is instantaneously at rest. x) The ... of the motion. z) The acceleration is larger when the oscillating mass has its greatest velocity.
Last Answer : ANSWER: W -- THE ACCELERATION IS LARGEST WHEN THE OSCILLATING MASS IS INSTANTANEOUSLY AT REST