Math/Physics
214,413 results, page 53

physics
What must be the magnitude of the force of static friction between the surface and the bottom of the crate? 
physics
a ball is thrown vertically upward at a speed of 45 m/s. how long does it take to return to the ground? 
Physics
You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/ 3mm. The area would be A +/ a cm^2. a. What is A? b. What is a? 
Physics
You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/ 3mm. The area would be A +/ a cm^2. a. What is A? b. What is a? 
PHYSICS
how far will a 1000kg car travel in 10 sec if it is accelerated from rest by a force of 5000N 
physics
Determine the net force needed to cause a 1310kg sports car to accelerate from 0  28.6m/s[fwd] in 5.6 s 
physics
A plane cruising at 251 m/s accelerates at25 m/s2 for 9 s.What is its final velocity?Answer in units of m/s 
Basic Physics
If a swimming pool has dimensions; 28.2 5m x 10.0m x 2.30m, when it is full of water, what is the force on the bottom ? 
physics
A spring has a force constant of 70000 N/m. How far must it be stretched for its potential energy to be 21 J? 
physics
what will happen to the bone structure if earth becomes more dense than its actual density? 
physics 11
By how much would 1200 W kettle, which is 72% efficient raise the temperature of 0.60 kg of water in 3.0 min? 
physics
what has no beginning and no end. it is also considered as the medium for light in einstein's theory of relativity 
physics
An argon atom has a mass of 6.64 x 10 kg has 5.5x108 joules of kinetic energy. At What velocity is it moving? 
physics
calculate the friction force of an object? if weight=19600,vi=30ms1,vf=0ms1 and S=100m. 
physics
if a car moving 180km/h reduces to 72km, what is the percentage change in kinetic energy? 
Basic Physics
What is the force of gravity between two spheres that have a mass of 8 kg and are separated by 27 m? 
physics
find the force if f between charges of +100mc 50mc located 50cm a part? 
physics
find the force if f between charges of 100mc 50mc located 50cm a part? 
physics
what is the kinetic energy of a 3 kg 20 cm diameter bowling ball with a linear velocity of 4m/s? (rolling and spinning) 
physics
the magnitude of the tongue produced by a 3.0n force applied to a door at a perpendicular distance of 0.25 m from the hinge 
Physics
How many joules would be required to raise the temperature of 20g of ice at oC to water at15C? 
physics
An equipotential surface that surrounds a point charge q has a potential of 516 V and an area of 1.01 m2. Determine q 
Physics
A jeep has a speed of 50 m/s at a given instant and 10 m/s later. fin its retardation, assuming it to be constant. 
physics
A jet travels at 435 m/s. How long does it take to travel 253 m? Answer in units of s 
Physics
How much work is needed to stop a 20g bullet moving with a speed of 150ms1 
Physics
Find the length of a simple pendulum that completes 16.0 oscillations in 52.0 s. CAN YOU PLEASE EXPLAIN SPECIFICALLY , THANK YOU! 
physics
what is meant by the change go temperature of 1 degree celcius on the scale of a plantinum resistance thermometer 
physics
How long does it take light to travel through a 3.3 mmthick piece of window glass? 
physics
a frieght train rolls at the same speed but has twice as much mass its momentum is 
physics
What magnitude point charge creates a 13000 N/C electric field at a distance of 0.220 m? 
Physics
A downward force of 5.1 N is exerted on a 7.3 mcirco C charge. What is the magnitude of the electric field at this point? 
Physics
What is the electrostatic force between two ballons, each having 0.000005 C of charge, when they are 0.5 m apart? 
Physics
A person stands 2.0 m away from the reflecting surface of a plane mirror. What are the image characteristics? 
physics
If a protonand an electron are released when they 2.0X10^10m apart, find the initial accelerationof each of them. I know a=ke^2/mr^2 k = 8.99 x 10^9 e = 1.6 x 10^19 r = 2.0x 10^10 so what is the m ???? 
physics
An equipotential surface that surrounds a point charge q has a potential of 590 V and an area of 1.20 m2. Determine q. 
Physics
what is the average force needed to stop a car (1000kg) traveling 28m/s in 55m? 
physics
the force required to maintain an object at a constant velocity in free space is eaqual to? 
Physics
What can we say about the force of an object when the mass increases and acceleration remains constant? 
physics
what is the height of the ball if the bottom of the swing is zero, speed is 2.8m/sec, 9.81 acceleration of gravity 
physics
When a transverse wave on a string is reflectred from the free end the phase change produced is 
physics
What would the gravitational potential energy be if the bucket were raised six times as high? 
physics
Calculate a person's hang time if he moves horizontally 2 m during a 1.39 m highjump. 
Physics
How can we find the resultant force if the mass and SPEED are given?? Give me the formula please!! 
physics
A particle starts moving with acceleration 2 m/s2. distance travelled by it in 5th half second is..?? 
physics
Consider a concave mirror with radius R. An upright object is placed in between the interval R/2 and R. R 
physics
a 125 cm long string has a mass 2.0g and it is stretched with a tension of 7.0 IN between fixed support 
Physics
The magnification of an object 2km tall where placed in 150m in front of a plane mirror is ? 
Physics
Calculate the work required to be done to stop a car of 1500kg moving with a velocity of 60km/hr? 
conceptional physics
If a 35cm radius tire spins at a rate of 72 rad/s what is the rotating speed? 
Physics "scientists"
* JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :) 
Physics
So if mgh=1/2mv^2 and I'm solving for v is my answer going to be v= squareroot of 2* (gravity) 9.8m/s^2* (height) 3.67m? 
physics
2. Determine the theoretical yield of aspirin if you started with 2.500 grams of salicylic acid? 
physics
problem E2_2 Strain, boundary conditions, displacement and elongation: Part I Plz help. 
Physics
How long does it take to deliver 315 J of energy to 0.850 cm^2 of a wall that it hits perpendicularly? 
physics
You can paddle at 4.5 km/h and the river is ﬂowing at 3 km/h. How far downstream will you be in 44 min? Answer in units of km 
physics
How long does it take light to travel through a 2.7 mmthick piece of window glass? 
Physics
2. How many oxygen atoms are indicated on the right side of this balanced chemical equation? 4 Cr(s) + 3 O2( g)h2 Cr2O3( g) 
Physics
A fuel has heat of combustion equal to 30 kJ / g. How much energy is released when 5 kilograms are oxidized? 
Physics
Which of the following is the correct relationship between the electric field strength and the potential difference? 
physics
describe with the aid of a fully labelled diagram the features and their uses of a bicycle pump 
physics
A car covers a distance of x,while moving at 54km/1 in 15sec.Find the value of x 
physics
What is the radius of an automobile tire that makes a complete turn in 0.1 sec and has a linear speed of 24.0 m/s? 
Physics
What is the circular force of a 150 g yoyo swung around on a 1.00 m string at a velocity of 5.0 m/s (in Newtons)? 
physics
what is meant by liquefaction of gases? can hydrogen be liquefied by compression at the temperature of liquid air? 
physics
a polar satellite is launched at 850 km above Earth .find its orbital speed. 
physics
If I have 1.5 moles of an ideal gas at a pressure of 3 atmospheres and a volume of 7 liters, what is the temperature? 
Physics
A meteoroid is speeding through the atmosphere, traveling east at 23.1 km/s while descending at 18.3 km/s. What is its speed, in km/s? 
Physics
Air in a balloon does 50 J of work while absorbing 70 J of heat.What is its change in internal energy? 
PHYSICS
How much heat must be added to 1.0 kg of iron to raise its temperature from 20°C to 95°C? (ciron = 0.11 cal/g•°C) 
physics
if a bus travels north with a constant velocity of3m/s, what is the displacement after 15 seconds? 
physics
a 1000 kg car with an average power of 100 kw accelerates from 0 to 50 m/s. how long does it take to accomplish this 
physics
75 kg block is dropped from a height of 6 m. How much kinetic energy does it have when it has fallen halfway? 
physics
how much work is needed to stop a 20g bullet moving with a speed of 150 ms1 
Physics
What is the formula to find magnetic field at the centre of the solenoid of hollow iron core?? 
physics
(a) How many kilograms of water must evaporate from a 60.0 kg woman to lower her body temperature by 0.750°C? 
Physics
a racing car has a uniform acceleration of 4 m/s2 What distance will it cover in 10secs after its start 
Physics
What electromagnetic waves are dangerous for humans and why? I have microwave, xrays....can you help name a few 
Physics
A stone is thrown vertically upward with a speed of 19.0m/s How fast is it moving when it reaches a height of 10.0m 
Physics
A car travels in a straight line for 4 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s^2? 
physics
Find the field produced by a uniformly charged sheet carrying 93pC/cm2 . 
Physics
What is the direction of force of friction on a bicycle on front and back wheel while paddling? 
physics
A body immersed in liquid has an upthrust of 140N with a density of 12kg calculate the velocity 
Physics
A car starts from rest and accelerates for 3.9 s with an acceleration of 5 m/s2 . How far does it travel? Answer in units of m 
physics
A meteoroid is speeding through the atmosphere, traveling east at 24.5 km/s while descending at 11.6 km/s. What is its speed, in km/s? 
Physics
What is the car's forward acceleration,at a speed of 30m/s,when the driving force on the wheels is 650N 
physics
A meteoroid is speeding through the atmosphere, traveling east at 19.5 km/s while descending at 12.7 km/s. What is its speed, in km/s? 
physics
calculate the linear momentum of a truck with a mass of 13065kg that is traveling at 36m/s eastward. 
Physics
a 52kg person riding a bike rotates her wheels in a circle of 17 cm what is her max tourque 
physics
Show that the magnitude of the charge on a capacitor is given by Q = (Qo(1e^(t/T))) and Q = Qoe^(t/T) for charging and discharging, respectively. 
physics
With V = Voe^(t/T), how many time constants does it take for a capacitor to discharge less than 1% of its initial voltage? 
physics
How much work does a student do if he throws a 0.750 kg ball with force of 45.0 N through a distance of 1.50 m? 
Physics
What is the kinetic energy of a 1100 kg sports car traveling down the road with a speed of 22 m/s? 
physics
What is the charge of a bare Magnesium nucleus (no electrons, just the protons and neutrons) in Coulombs? 
physics
on a cool night with no wind people facing a campfire feel a breeze on their backs. why? 
Physics
coin and a piece of glass are both heated to 60 degrees celsius which will be warmer when you touch it ? 
Physics
Why do some cooks put long aluminum nails through potatoes to be baked? 
Physics
coin and a piece of glass are both heated to 60 degrees celsius which will be warmer when you touch it ? 
Physics
Why do some cooks put long aluminum nails through potatoes to be baked? 
physics
In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can? 
Physical Science
What are the noninvasive benefits of the medical technologies that rely on physics of elementary particles?