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Questions in physics

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] A bullet is fired with a speed of 1000 m/sec in order to hit a target 100 m away. If g = 10 m/s², the gun should be aimed: (1) Directly towards the target (2) 5 cm above the target (3) 10 cm above the target (4) 15 cm above the target A body is projected up with a speed 'u' and the time taken by it is T to reach the maximum height H. Pick out the correct statement: (1) It reaches H/2 in T/2 sec (2) It acquires velocity u/2 in T/2 sec (3) Its velocity is u/2 at H/2 (4) Same velocity at 2T

[Answered] MATCHING TYPE Introduction to Measurements, Quantity, Physical quantity, Types of Physical quantities, Fundamental Quantities 50. Column-I | Column-II ---|--- 1) Amount of substance | p) SI system 2) Luminous Intensity | q) CGS system 3) Centimeter | r) Mole 4) Kilogram | s) Candela Options: a) 1-r; 2-p; 3-q; 4-s c) 1-q; 2-s; 3-p; 4-r System of units, Measurement of length: 51. Column-I | Column-II ---|--- 1) Length | p) Metre 2) Mass | q) Second 3) Time | r) Kilogram 4) System of unit | s) FPS | t) C.G.S Options: a) 1-r; 2-p; 3-q; 4-s c) 1-p; 2-r; 3-q; 4-t, s Measurement of Mass: 52. Column-I | Column-II (PCQ) ---|--- 1) Railway engine | p) Quintal 2) Packet of chilli powder | q) kg 3) Sack of wheat | r) mg 4) Huge bag of sand | s) g 5) Aspirin tablet | t) Metric ton Options: a) 1-t; 2-s; 3-p; 4-q; 5-r c) 1-q; 2-s; 3-t; 4-r; 5-p Measurement of Time: 53. Column-I | Column-II ---|--- 1) Unit of length in F.P.S | p) Metre 2) Unit of mass in C.G.S | q) Second 3) Unit of time in C.G.S | r) Pound 4) Unit of length in S.I | s) Gram | t) Foot Options: a) 1-t; 2-s; 3-q; 4-p c) 1-t; 2-s; 3-p; 4-r

[Answered] A conducting sphere of radius R = 32 cm is given a charge Q = 16 μC. What is the electric field (E) at the center?

[Answered] A container with a volume of 2.0 L is filled with a gas at a pressure of 1.5 atm. By decreasing the volume of the container to 1.0 L, what is the resulting pressure? Type in your answer using the correct number of significant figures. Remember to use the formula for Boyle's law: [tex]$P_1 V_1=P_2 V_2$[/tex]

[Answered] Which type of current flows in only one direction and is produced by a battery? A. magnetic B. voltage C. alternating D. direct

[Answered] Deduce the expression for the control maximum in diffraction of light?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Determine the mass of the pennies and use your labkit ruler to determine their volume. Use those values to calculate density. | Object: | Mass (g) | Diameter (cm) | Radius (½ diameter) | Height (cm) | Volume (cm³) | Density (g/cm³) | |---|---|---|---|---|---|---| | 5 pennies | 12.48 | 1.90 | 0.95 | 0.5 | 38 cm³ | 32 g/cm³ | (Volume of this stack of pennies is the volume of a cylinder, V = h × π × radius²)