# Physics!

73,661 results, page 98

### physics

A brick dropped from a roof hits the ground 3.29 seconds later. How high (in m) was the roof?

### physics

What is the average velocity in the following cases? You run 77.9 m West at 2.67 m/s then walk for 133 s at 8.78 m/s West.

### physics

What is the average velocity in the following cases? You run 77.9 m West at 2.67 m/s then walk for 133 s at 8.78 m/s West.

### physics

How much heat is necessary to change 500g of ice at-10 celsius to water at 20 celsius?

### physics

what is a satellite's altitude above the surface of the earth if earth's mass is 5.98*10^24 kg and its radius is 6380 km?

### physics

A football is kicked 66.6 meters. If the ball is in the air for 5.39 seconds, with what initial velocity was it kicked?

### physics

A 1400 kg car takes a 50 m unbanked curve at 14 m/s. What is the size of the friction force on the car?

### physics

Why is more impulse delivered during a collision when bouncing occurs than during one when it doesn't?

### physics

John runs at 4.6 m/s for 7.53 s along the x axis. How far does John run? Answer in units of m

### physics

A hydrogen atom has a diameter of about 10.1 nm. Express this diameter in meters, millimeters, and micrometers.

### physics

A human hair is approximately 55 µm in diameter. Express this diameter in meters. Answer in units of m

### physics

You drive a car for 2.0 h at 35 km/h, then for another 2.0 h at 64 km/h. (a) What is your average velocity? (b) What is your answer if instead you drive 99 km at each of the two speeds?

### physics

You drive a car for 2.0 h at 35 km/h, then for another 2.0 h at 64 km/h. (a) What is your average velocity? (b) What is your answer if instead you drive 99 km at each of the two speeds?

### Physics HELP!!

A 4165.0kg truck is parked on a 15.8deg slope. What is the friction force on the truck?

### Physics

A stone is released from an elevator going up with accelaration 'a' . The acceleration of the stone after release is ?

### Physics

An arrow is shot at an angle 36 of with the horizontal. It has a velocity of 47 m/s. How high will the arrow go? The acceleration of gravity is 9.8 m/s

### Physics

a 14.0 N·m torque on a wheel causes angular acceleration 11.3 rad/s2, what is the wheel's rotational inertia?

### Physics

If a sonar echo takes 2.20 seconds to return from a whale, how faw away is the whale?

### physics

If you drop a 4 pound watermelon and a 2 pound cabbage the same distance, in a vacuum, what will happen?

### Physics

A driver approaches an intersection at a speed of 50km/h, when the light turns amber. The driver

### Physics

How much energy is released by 10 kg of liquid silver at 961°C as it cools to solid silver at 20°C?

### physics

The net external force on the propeller of a 3.9 kg model airplane is 6.8 N forward. What is the acceleration of the airplane?

### physics

The net external force on the propeller of a 3.9 kg model airplane is 6.8 N forward. What is the acceleration of the airplane?

### Physics

Find the gravitational force exerted by a 0.525 kg mass on a 0.109 kg mass 2.04 m away.

### Physics

crane lifts a 75 kg girder 8.85 m. How much work does the crane do lifting with an upward acceleration of 1.20 m/s ^2?

### Physics

An engine does 15kJ of work while rejecting 37 kJ to the cold reservoir. What is the efficiency of the engine?

### Physics

An engine does 15kJ of work while rejecting 37 kJ to the cold reservoir. What is the efficiency of the engine?

### Physics

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

### Physics

How do you determine the displacement of a graph with lots of areas of displacement, do you add them all together?

### Physics

How do you determine the displacement of a graph with lots of areas of displacement, do you add them all together?

### Physics

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

### physics

A 75 particle is moving to the left at 29 . How much work must be done on the particle to cause it to move to the right at 46 ?

### Physics

12 volts is applied across a 4 ohm resistor. How much power is dissipated by the resistor?

### Physics

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

### Physics

An elevator lifts a total mass of 1.1 x 10^3 kg, a distance of 40 m in 12.5s. How much power does the elevator demonstrate?

### Honors Physics

If the potential energy is 1962000 what is the kinetic energy of a boulder weighing 200 kg

### physics

a baseball has a mass of .145 kilograms. If the acceleration die to gravity is 9.8m/s, what is the weight of the baseball

### physics

a series RLC circuit is composed of a 6.00-mH inductor and a 2.50-uF capacitor. what is the resonant frequency of this circuit?

### Physics

A motorist travels 1600 m at 80 m/s and 750 m at 100 m/s. What is the average speed of the motorist for this trip.

### physics

A bobcat jumps with a speed of 5m/s at an angle of 55 degrees. How long does the bobcat stay in the air?

### physics

the volume of 50g of a substance is 20 cm^2 if the density of water is 1 g cm^-1 will the object floats or sinks in water.???

### Physics-Momentum

Baseball 0.14 kg moving at 35 m/s. Momentum of the ball? this should be easy b/c i know p=m*v but i get 4.9 kgm/s and it's wrong.....

### physics

two forces of 5 N respectively act on an object.when will the resultant of the two vectors be at a maximum?

### Physics

If a wave has a frequency of 24Hz and a wavelength of 15m, how do you calculate the speed of the wave ???? Please help

### Physics

If a wave has a frequency of 24Hz and a wavelength of 15m, how do you calculate the speed of the wave ???? Please help

### physics

A 25 mF capacitor is connected to a source of potential difference 100V. What is the resulting charge in the capacitor?

### science (physics)

A 980 N box has a mass of 100 kg. What is the acceleration of the box due to gravity?

### physics

if 8100 calories are released from 200g of steam at 100C, how much of the steam condenses?

### Physics

what is the number of grams of steam at 100 degrees C that will condense as 5g of ice at 0 degrees C melts?

### Physics

how much heat energy needed to convert 125g ice 27 deg C to 50 deg C

### Physics

Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons.

### physics

how much work (J) is done by friction when the mass is 150 kg and dragged for 10 m if the coefficient of sliding friction is .3?

### Physics

An ideal refrigerator-freezer operates with a COP = 8.0 in a 28°C room. What is the temperature inside the freezer?

### physics

If a 0.5kg toy car is rolling down a hill with a velocity of 0.8m.s, what is the car's momentum?

### Physics

What is the gravitational force between two 5.00 kg masses that are 10.0 cm apart from center to center? (G = 6.67 × 10-11 N m2/kg2)

### Physics

What are the frequencies and the note names of the first six harmonics of the note G3? Explain your procedure.

### Physics

Find the mass of water that vaporizes when 3.94 kg of mercury at 248 °C is added to 0.183 kg of water at 83.0 °C.

### Physics

Find the mass of water that vaporizes when 3.94 kg of mercury at 248 °C is added to 0.183 kg of water at 83.0 °C.

### physics

The nuclei having same number of protons but different number of neutrons are called--------

### Physics

You hit someone with a force of 197 N. How much force is exerted on you? Answer in units of N

### college physics

If the initial tension in the string is (2.10+/- 0.02)N, what is the tension that would double the wave speed?

### physics

a load 500N is raised 0.2m by a machine in which an effort of 150N moves 1m. what is the work done on the load?

### applied physics

an ironworker drops a hammer 5.25m to the ground. what is its speed as it hits the ground?

### Physics

Calculate d energy of d 3rd level of an atom if d ground state energy is -24.8ev

### Physics

A big 2.5 blob of macaroni and cheese falls to the floor in 1.2 seconds. What is the impulse on the blob?

### physics

if the angle between the incident ray and reflected ay is 120 degrees, what is the angle of reflectio?

### Physics

Which of the following is correct for the two coherent light waves to produce zero light?

### physics

If you run away from a plane mirror at 2.35m/s , at what speed does your image move away from you?

### Physics

A car travels 30 km north in 25 min. and 40 km east in 35 min. What is the total distance traveled?

### physics

What is the net force on a cart that is pulled to the right with 120 pounds and to the left with 30 pounds?

### physics

What is the electric field intensity produced by a charge at 10 meters, where the electric potential is 1.44 volts?

### Physics

If the total mass of the hydrogen in the hindenburg zeppelin was 18000kg, what volume did the hydrogen occupy?

### Physics

An object accelerates from 10m/s to 16m/s in 10 secs. What will be the object’s velocity after 1 minute?

### Physics

What happens to the brightness of light emitted by a light bulb when the current in the filament increases?

### Physics

A car traveling at 11m/s accelerates to 2.82m/s^2 for 13 seconds how far does the car travel?

### Physics I

Suppose a rocket launches with an acceleration of 32.0m/s^2. What is the apparent weight of an 95-kg astronaut aboard this rocket?

### Physics I

Suppose a rocket launches with an acceleration of 32.0m/s^2. What is the apparent weight of an 95-kg astronaut aboard this rocket?

### Physics

The frequency of a centrifuge is 60 Hz and its radius is 0.15 m. What is the centripetal acceleration of an object in the centrifuge at a distance of 0.15 m from the center?

### physics

Why we use square root of density in Grahms law instead of simpl density?

### physics

an airplane rolls down the runaway. compared to which reference point is the airplane in motion?

### physics

Forces of 8.85 N and 2.21 N act at right angles on a stack. What is the mass of the stack if it accelerates at a rate of 4.4 m/s^2?

### Physics

A circular ring of radius 10 cm has a continuous charge distribution of 4C/m . How many total electrons are on the ring?

### Physics

Use the equation for acceleration to determine the acceleration for the following motion. Time(s) 0 1 2 3 4 Velocity(m/s) 0 2 4 6 8

### physics

n object is dropped from rest. What is the acceleration after 6 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m/

### physics

An electron floats at rest above a sheet of charge with uniform charge density x. What is x in C/m^2

### physics

If my kinetic coefficient and static coefficient are both 1.02, how can I explain why they are the same???? (For a horizontal surface)

### Physics

At 1:00 p.m. a car, traveling at a constant velocity of 80 km/h toward the west, is 31 km to the west of our school.

### Physics

A 0.40 g fruit in a tree has a gravitational potential energy of 200 J. How high from the ground is the fruit?

### physics

A 2.0 kg rock is dropped from the top of a building. I lands 14.0 seconds later. How tall was the building?

### Physics 221

What is the magnitude and direction of the electric field at a point 0.75 m away from a point charge of +2.0 pC?

### physics

two forces 5N and 7N act on an object respectively.When will the resultant of the two vectors be at a maximum?

### Physics

What affect does changing the mass of an object on a ramp have on the efficiency of the ramp? Explain.

### physics

A man walks 10km due south. The displacement of the man from the initial position is

### Physics

A penny is dropped from a 50 m high bridge, how fast was the penny moving when it hit the water?

### Physics

A penny is dropped from a 50 m high bridge, how fast was the penny moving when it hit the water?

### Physics

A car experiences a constant acceleration of 2.3 m/s2. How long does it take (in s) for the car's speed to increase from 6.6 m/s to 17.9 m/s?

### Physics

On an unknown planet, a pendulum of length 1.5 m swings with a period of 3.3 s. What is the acceleration of gravity on this planet?

### physics

he x-component of a velocity vector that has an angle of 44∘ to the +x-axis has a magnitude of 4.3m/s . What is the magnetude velocity?

### Physics

A boat takes 2.0hr {\rm hr} to travel 26km {\rm km} down a river, then 6.0hr {\rm hr} to return.