Answers created by Steve J.

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• Why do the metal fins in the refrigerator get warm? what is the source of this heat?
  
• Why is specific heat an intensive property?
  
• How do buoyant forces affect free fall?
  
• A ball of moist clay falls 15.0m to the ground. It is in contact with the ground for 20ms before stopping?
  
• Work done is zero if an object moves with constant velocity? right?
  
• You hold your hand 3 feet above the ground and look at the shadiw cast by the sun. You repeat this inside using the light from a 2-foot by 4-foot fluorescent light boxin the ceiling. In which case will the penumbra be more pronounced?
  
• If a projectile is projected with kinetic energy.having maximum possible horizontal range.then what will be it's kinetic energy at highest point?
  
• What is the net force if you push a cart to the right with 5N of force and a friend pushes the cart to the left with 5N of force?
  
• 200 joule of energy is supplied to machine which is 40% efficient amount of energy lost is?
  
• Kinetic energy of body is increased by 300 % momentum of body is increased by?
  
• Given a unit circle, what is the value of y in the first quadrant corresponding to an x-coordinate of 5/8?
  
• I don't understand these explane me please .... (Two electric lines of force naver intersect each other ?????)with diagram
  
• A man is walking due east at the rate of of 4kmph and the rain is falling 30° east of vertical with a velocity of 6kmph the velocity of rain relative to the man will be?
  
• How long should the ball take to fall on the floor from the time it leaves the edge of the table...?
  
• Two blocks A and B of equal masses are attached to a string passes over a smooth pulley fixed to a wedge as shown find the magnitude of acceleration of the center of mass of the two blocks when they are released from rest . neglect friction ?
  
• Is alternating current dangerous?
  
• Why is acceleration due to gravity constant?
  
• How can I calculate the specific heat capacity of a metal?
  
• How does energy change forms?
  
• What is the effect of a magnetic field on a electric charge? On a moving electric charge?
  
• In a house, 5 bulbs of 40W, 4 bulbs of 1000 W and 750W refrigerator are used for 5 hours daily. Thn how much energy is consumed per day?
  
• How do you simplify # tan[cos^-1(-(sqrt3/2))]#?
  
• Find the value of the variable?
  
• What is the specific relation between width and height of rectangular ?
  
• How do you find the amplitude of a cosine function?
  
• How do you calculate the force of buoyancy?
  
• How to decide which forces that works on the acceleration?
  
• A resting car starts accelerating uniformly at #a_1# rate a then moves at a constant velocity =4m/s then decelerates at a constant rate #a_2#. the velocity of the car is greater than 2m/s for 10sec. What is the distance traversed by the car?
  
• If the velocity of body is doubled then % increase in centripetal force will be?
  
• What is gravitation? (a) Objects attract each other (b) what goes up must come down (c) both (a) and (b) (d) None of the options is correct.
  
• It is known that 1 gallon of water weighs 8.3453 pounds. which weighs more an ounce of pennies or an ounce(as capacity) of water explain.?
  
• True or false? -MOMENT of inertia of a particle rotation about an axis decrease when it's distance from the axis increase. Thanks
  
• Why doesnt it matter where a switch is located in a series circuit?
  
• Why is angular momentum perpendicular?
  
• A cart of mass 1000 kg is pulled by a horse of 200kg. The coefficient of friction between them and ground is 0.2. Calculate the force required to produce acceleration of 2 m/s^2 in the cart??'
  
• The mass of each car is 600kg, 970kg, 230kg, 810kg, 660kg. The force of friction on each car is 1980N, 3201N, 759N, 2673N, 2178N respectively. What is the magnitude of the backward forces on the 2nd car?
  
• Deciding voltage of a capacitor in a circuit?
  
• Why does Newton's cradle stop?
  
• Distance travelled in T1,T2 and T3 time intervals ar 3km,11km and 2km respectively. T1+T2+T3=36 mins.What is the maximum speed?
  
• A man throws a ball vertically upward in a compartment of an accelerated train. The ball will fall A. in front of him B. in his hand C. behind him D. beside him?
  
• An object with a mass of # 5 kg# is lying still on a surface and is compressing a horizontal spring by #2 m#. If the spring's constant is # 6 (kg)/s^2#, what is the minimum value of the surface's coefficient of static friction?
  
• Pushing a grocery cart with a force with a magnitude of 95 N, applied at an angle of 35° down from the cart horizontal, makes the cart travel at a constant speed of 1.2 m/s. What is the frictional force acting on the cart?
  
• How do ik if a question is an elastic collision or inelastic collision? How do i distinguish the difference between them when i am given a question on the test?
  
• What is the major functions of each engine components,1 valves, 2 cams and camshaft, 3 crankshaft, 4 intake and exhaust manifolds?
  
• How to find the rate of acceleration?
  
• How do I do algebra subsitution?
  
• A body is rotated by suspensive wire what will be the kinetic energy of the mass m?(with logic)
  
• Find the force between the two charges as well as an angle?
  
• A) An object weighs 40 g in air and has a volume of 8.0 cm3. What will be its apparent weight when immersed in water?
  
• What affects the level at which a ship floats in the water?
  
• How does bouncing affect impulse?
  
• Is the weight of a 100-pound weight for 200 meters is equivalent to carrying a 50-pound weight for 400 meters? Is the enrgy is equivalent ?
  
• How do I find the Voltage of this circuit?
  
• Why is speed classified as a scalar quantity and velocity classified as a vector quantity?
  
• How is buoyant force related to weight?
  
• How does a conversion factor differ from a measurement?
  
• A student throws a water balloon vertically downward from the top of a building? [see below]
  
• IS there any machine that can multiply force and speed or distance at the same time?why?
  
• What current flows through a hair dryer plugged into a 110 Volt circuit if it has a resistance of 25 ohms?
  
• How do you multiply #sqrt81*sqrt36#?
  
• When Frank and Mark finished milking, they found that they had 900 pounds of milk that was 2% butterfat. How much butterfat did they have to add to raise the butterfat content to 10%?
  
• If a police car with its siren on approaches you, how will the pitch of the siren be affected from the policeman's perspective?
  
• A little help please?
  
• Who's interested in a new Socratic on a different website?
  
• Find the electric field at x=50cm and x=100cm?
  
• Only two horizontal forces act on a 3.0 kg body that can move over a frictionless floor. One force is 9.0 N, acting due east, and the other is 8.0 N, acting 62 degree north of west. What is the magnitude of the body's acceleration?
  
• How much power is produced if a voltage of #12 V# is applied to a circuit with a resistance of #24 Omega#?
  
• A motor car is going due north at a speed of 50 km/h. It makes a 90 degree left turn without changing the speed . the change in velocity of the car is about?
  
• You answered my question as yes someone answered no . I need correct answer for the question is kilometer is SI unit of length?
  
• How to solve this?
  
• A charged body has lost 10^3 electrons . find the magnitude of charge on the body?
  
• Does an object need an overall net force applied to it before it can move?
  
• How does centripetal acceleration differ from linear acceleration?
  
• Will current pass through a capacitor attached to a DC source?
  
• 2 capicitor wire s habing diameter 3.0mm and T having diameter 1.5mm are connected in parallel a potential difference is applied across the ends of parallel arrangement the value of ratio of current T to current S is?
  
• How do you find the exact values of cot, csc and sec for 45 degrees?
  
• What applied force is needed by a 5kg to accelerate 10 m/s2?
  
• Potential combination of cells neither increases the current nor the ppyential difference then what is the advantage of connectings cells in parallel?
  
• A rocket is accelerating straight up from the surface. At 1.35s after lift, the rocket clears top of its launch platform, 63m above the ground. After additional 4.45s its 1 km above ground. What's the magnitude of average velocity for the 4.45s part?
  
• What are importance of electromagnetic waves ?
  
• Physics, Vectors?
  
• A sound has speed of 330m/s and frequency of 50Hz what is the possible distance between 2 points on wave that have phase difference of 60°?
  
• How will a body move after dropped off from a plane?
  
• How much work is done when a body moves with uniform velocity?
  
• What is the missing reason in the proof?
  
• How to solve this equation?
  
• Explain why a 1375kg car with the same engine, producing the same acceleration (16m/s/s) as a 1400kg car might have a slight advantage? The 1400kg car uses a force of 22,400N and the 1375kg car uses a force of 22,000N to accelerate. Someone please help?
  
• If a proton,neutron and electron are placed in a magnetic field then which particle will experience zero force?
  
• The p.d. across a lamp is 12 V. How many joules of electrical energy are changed into light and heat when i. a charge of 1 C passes through it, ii. a charge of 5 C passes through it, iii. a current of 2 A flows in it for 10 s?
  
• A truck starts from rest at the top a slope which is 1 m high and 49 m long. What is the acceleration and it's speed at the bottom of the slope assuming friction is negligible?
  
• Radius of a wire is 2.5mm and its lenfth is 50.0cm.If it's Mass is measured to be 25gm then find its densite up to correct significant figures?
  
• A hang glider dropped his cell phone from a height of 350 feet. How many seconds did it take for the cell phone to reach the ground?
  
• If a #3/2 kg# object moving at #4/3 m/s# slows to a halt after moving #1/3 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?
  
• The smallest insect a bat can detect are approximately the size of one wavelength of the sound the bat makes. a) what minimum frequency of the sound is necessary for the bat to detect an insect 0.57cm long? b) what is the period of the wave?
  
• How much heat is required to convert steam of 100c to water of 100c?
  
• A jogger runs along a road for a distance of 2700 m. If it takes her 900 seconds to to run that distance, what is her speed?
  
• Q. A stone is dropped from the window of a bus moving at 60 km/hr. If the window is 196cm high, what is the distance along the track which the stone moves before striking the ground ?
  
• A woman at an airport is towing her 20.0-kg suitcase at constant speed by pulling on a strap at an angle θ above the horizontal (see figure). She pulls on the strap with a 35.0-N force, and the friction force on the suitcase is 20.0 N.?
  
• A car of mass 1200kg pulls a trailer of mass of 400kg along a straight horizontal road. The car and trailer are connected by a tow-rope modelled as a light inextensible rod. The engine of the car provides a constant driving force of 3200N. (see ? below)
  
• How is the buoyant force related to the weight of water displaced?
  
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