# Physicss

43 results

### physicss please help

Suppose m1 = 9.52 kg, m2 = 11.99 kg and vf = 5.71 m/s. If v1i = 10.1 m/s, what was v2i

### physicss

What average force is required to stop an 1100 kg car in 9.1 s if it is traveling at 83 km/h?

### physicss

How long will it take a 2.30 x 10^3 kg truck to go from 22.2 m/s to a complete stop if acted on by a force of -1.26 x 10^4 N? what would be its stopping distance?

### Physicss

Fast pleaseee Calculate speed of a 50 kg boy travelling on his bike his kinetic e is 1250 J I did v= 2KE/m i got 50? Help

### physicss

state the precision of the measured quantities 1. 0.07 m 2. 908 s 3. 7.60 L 4. 0.005 0 mm answers: 1. 0.01 m 2. 1 s 3. 0.01 L 4. 0.0001 mm i do not understand this , please explain it to me

### physicss

an. Electron travels in a circular orbit of radius 0.5 a and frequency of 5.5*10^7hz. Findthe magnetic field produced At center

### physicss

an. Electron travels in a circular orbit of radius 0.5 a and frequency of 5.5*10^7hz. Findthe magnetic field produced At center

### physicss

A child sits on a swing supported by ropes of length 3.0 m. With what frequency will she need to apply the driving force to maintain swinging?

### physicss

1) Is it possible for the net torque to be opposite the direction of angular velocity 2) Can momentum be conserved if mechanical energy is not conserved?

### Physicss

a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.? Thank you

### physicss

A cube with sides each 3cm long has 8 charges of Q = 25nC at each corner. What is the electric potential \Delta V at the center of the cube with respect to infinity, which is defined to have V=0 V?

### physicss

If there were no air resistance, with what speed would drops hit the Earth if they fell from a cloud 1980 m above the Earth’s sur- face? The acceleration of gravity is 10 m/s2

### Physicss....

Two carts with masses of 4.24 kg and 2.22 kg move toward each other on a frictionless track with speeds of 4.55 m/s and 3.16 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

### PHYSICSS.. someone help plz.

A football is kicked at 15 m/s with an angle of 35 degrees with the ground. How long is it in the air? How far will it land? Can someone help plz... Thanks!

### PHYSICSS

A block is projected up a frictionless inclined plane with initial speed v1 = 3.40 m/s. The angle of incline is è = 31.1°. (a) How far up the plane does it go?(m) (b) How long does it take to get there? (s) (c) What is its speed when it gets back to the bottom?(m/s)

### physicss

a point charge -q, mass m is flying up at the speed v(0)= v 0 from the distance x(0)=L from a uniformly and positively charged thin plate, its linear density equal p. determine the maximum distance of a particle from the plate

### physicss

A heavier mass m1 and a lighter mass m2 are 20.5 cm apart and experience a gravitational force of attraction that is 8.80 10-9 N in magnitude. The two masses have a combined value of 5.65 kg. Determine the value of each individual mass.

### PHYSICSS HELP

3)-A 9-kg block is held by a pulley system shown in fig. What force must the person exert in the following cases: a) to hold the block at rest. b) to lower it at 2m/s. c) to raise it with an acceleration of 0.5 m/s2? Ignore the mass of small pulley.

### physicss

A long string carries a wave; a 5.40-m segment of the string contains three complete wavelengths and has a mass of 180 g. The string vibrates sinusoidally with a frequency of 45.0 Hz and a peak-to-valley displacement of 19.0 cm. how do you go about writing a formula in the ...

### physicss

Two point charges experience an attractive force of 5N when they are separated by 1m.what force do they experience when their separation is 2m? What is the value of the charges Using coluomb's law F=KQ1Q2/r^2 5=8.99*10^9*Q1*Q2/1

### physicss

A 0.190 kg piece of copper is heated and fashioned into a bracelet. The amount of energy transferred as heat to the copper is 6.62 x 10^4 J. If the specific heat of copper is 387 J/kg x °C, what is the change in temp of the copper?

### physicss please help

Calculate the terminal velocity for a baseball. A baseball's diameter is approximately d = 0.073 m, and its mass is m = 0.146 kg. Express your answer in meters per second and miles per hour. (Assume a drag coefficient of 1 and air density of 1.3 kg/m3.) __ m/s __ mph

### PHYSICSS!!!!!

At t = 0, a particle moving in the xy plane with constant acceleration has a velocity of vi = (3.00 i - 2.00 j) m/s and is at the origin. At t = 2.00 s, the particle's velocity is v = (6.60 i + 4.00 j) m/s. Find the acceleration of the particle at any time t. (Use t, i, and j ...

### Physicss

Chapter 4, Problem 40 A 94.9-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 2.30 m/s^2, (b) moving upward at a constant speed, and (c) accelerating downward with an acceleration of 1....

### physicss

A car traveling 84 km\h is 150 m behind a truck traveling 67km\h. How long will it take the car to reach the truck?(Second) I'll got the answer and it was 30 second But I really dono how It was solved I need the wayyy;((

### physicss

A steel wire is used to lift heavy object. The cable has a diameter of 14.25 mm and an initial length of 33.5 m. If the cable stretches 2.50 mm, what is the mass of the heavy object? Use 20.0 x 10^10 Pa for Young’s modulus for steel. Give your answer in kg and with 3 ...

### physicss

A 0.145 kg baseball pitched at 44.0 m/s is hit on a horizontal line drive straight back toward the pitcher at 52.0 m/s. If the contact time between bat and ball is 3.00 ✕ 10-3 s, calculate the average force between the ball and bat during contact.

### physicss

a small cork with a excess charge of +6.0 μC (1 μc = 10^-6 C) is placed 0.12 m from another cork, which carries a charge of -4.3 μC.... how many electrons are on the negative cork?

### Physicss

A guy playing basket-ball needs to make the penalty shot for his team to win. Given that the ball is thrown from a height of 2 meters at an angle of 60 degrees, that the post is situated at a distance of 7 m and standing at 3.5 m: a) What does the initial velocity have to be? ...

### Physicss

1. Carlos jogs in a straight line at a constant speed of 1.5 m/s. He passes by Victoria, who, 10 seconds after Carlos had passed her, starts accelerating at a constant rate of 0.50 m/s^2 a) How much time after the passing of Carlos does it take Victoria to catch up to him? b) ...

### Physicss

A torque of 77.7 Nm causes a wheel to start from rest, completes 5.55 revolutions and attains a final angular velocity of 88.8 rad/sec. What is the moment of inertia of the wheel? I am trying to find angular acceleration first. How do I find it given this information? I need ...

### physicss help!

m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with the spring unextended...

### physicss

An ideal fluid flows through a pipe made of two sections with diameters of 1.0 and 3.0 inches, respectively. What is the ratio of the speed of the fluid through the 3.0-inch section to the speed of the fluid through the 1.0-inch section? A. 1 : 3 B. 1 : 6 C. 1 : 9 D. 3 : 1 E. ...

### physicss

vivian is walking to the hairdresser's at 1.3 m/s when she glances at her watch and relizes that she is going to be late for her appointment. Vivian gradually quikens her pace at a rate of 0.090 m/s2(squared) What is vivians speed after 10.0s? At this rate is Vivian walking ...

### Physicss

a typical woman gives off heat at rate of about 8000 calories per hour. how long would a woman have to stay in a bath of 60L (60,000 g) of 26 C water in order to raise the water temperature to 30 c ? presume that all the heat given off by the woman is transferred to the water...

### physicss

A 0.005kg bullet is fired at 400m/s straight into a stationary 1.0kg block of wood. The bullet exits the far side of the block and continues on the same straight line. The block also moves off in this same direction with a velocity of 1.2m/s. Calculate the velocity of the ...

### PHYSICSS

Question In an experiment a gas was found to obey the following equation of state: (P + 10^3)V = 2.5 x 10^4 J Find the work done when the gas expands from 1 m3 to 3 m3. _______ the answer is suppose to be 2.55 x 104J ____________ what i did so far 2 ways i approached this ...

### physicss

The question states: A 5.2 kg box is on a frictionless 36 degree slope and is connected via a massless string over a massless, frictionless pulley to a hanging 2.1 kg weight. What is the tension in the string if the 5.2 kg box is held in place, so that it cannot move? I summed...

### physicss

A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1 /6 g. Find the reading of the spring scale on the moon...

### physicss

The oil drain plug on a car's engine has just been tighten to a torque of 25m*N. a) if a 0.15m long wrench is used to change the oil, what is the minimum force needed to loosen the plug? b) due to limited workspace, it will be necessary to crawl under the car. the force cannot...

### Physicss

Please show work You decide to take a nice hot bath but discover that your thoughtless roommate has used up most of the hot water. You fill the tub with 270 kg of 30.0°C water and attempt to warm it further by pouring in 5.00 kg of boiling water from the stove. (a) Is this a ...

### physicss

Which of the following is true for a photon? A photon of wavelength 3000 x 10-10 m has momentum twice than a photon of wavelength 6000 x10-10 m. A photon of wavelength 3000 x 10-10 m has momentum twice than a photon of wavelength 6000 x10-10 m. A photon of wavelength 3000 x 10...

### PHYSICSS!!!

still cant get this one? so damon i know you wanna help! or anyone else im open for suggestions haha Consider a spaceship located on the Earth-Moon center line (i.e. a line that intersects the centers of both bodies) such that, at that point, the tugs on the spaceship from ...### Pages

**1**