12,748 Answered Questions for the topic physics

Physics

03/01/23

Car Collision Physic

A 40,000 kg car collides with a stationary car. They couple together, and 35 percent of the initial kinetic energy is dissipated as heat, sound, vibrations, and so on. What is the mass of the car?
Physics

03/01/23

Escape Velocity

An object is projected from the surface of the earth with a speed of 1.68*10^4 m/s. What is its speed when it is very far from the earth? (Neglect air resistance.)
Physics

03/01/23

Consider the following figure.

Calculate the current in each resistor if a potential difference of 74.0 V is applied between points a and b.(R= 18.0Ω)I(4.00 Ω):I(7.00 Ω):I(18.0 Ω):I(9.00 Ω):
Physics

03/01/23

Consider the combination of resistors shown in the figure below.

If a voltage of 46.6 V is applied between points a and b, find the current (in A) in each resistor. 12 Ω:6.0 Ω:5.0 Ω :4.0 Ω: 8.0 Ω:
Physics

03/01/23

Impulse/ Velocity 2

wo objects travel towards each other and undergo a perfectly elastic interaction. Before they collide, object A has a mass of 373g and a velocity of 9.4m/s, while object B has a mass of 601g and a... more
Physics

03/01/23

Impulse/ Velocity

Two objects travel towards each other and undergo a perfectly inelastic interaction. Before they collide, object A has a mass of 903g and a velocity of 16.8m/s, while object B has a mass of 333g... more
Physics

03/01/23

An aeroplane is flying in circles of radius r_o at a speed of v_o giving the plane an angular velocity of w_o and a time period of T_o.

What will the angular velocity w and time period T in terms of w_o and T_o when r=1.5r_o?
Physics

02/28/23

Physics Review Question

The figure below shows a block of mass m=2.0 sliding to the right across a floor through a distance of 20.0 cm the coefficient of kinetic friction between the floor and block 0.15Had to get... more
Physics

02/28/23

PHY Review Question

At the end of a factory production line boxes start from rest and slide down a deg (horizontal) ramp that is 5.4 meters long.Find a formula for the acceleration of the box down he ramp in terms of... more
Physics

02/28/23

How to use promo code

Hi,I have received a wyzant flyer with a QR code for $25 off. I want to use it towards next lesson . I tried scanning the QR code but still no discount applied to this weeks lesson charge. I had... more
Physics

02/28/23

An undiscovered planet, many light-years from Earth, has one moon, which has a nearly circular periodic orbit. If the distance from the center of the moon to the surface of the planet is 2.090×105 km

An undiscovered planet, many light-years from Earth, has one moon, which has a nearly circular periodic orbit. If the distance from the center of the moon to the surface of the planet... more
Physics

02/28/23

The acceleration due to gravity, 𝑔, is constant at sea level on the Earth's surface. However, the acceleration decreases as an object moves away from the Earth's surface due to the increase...

The acceleration due to gravity, 𝑔, is constant at sea level on the Earth's surface. However, the acceleration decreases as an object moves away from the Earth's surface due to the increase in... more
Physics

02/28/23

Assuming that the Earth has a uniform density 𝜌=5540.0 kg/m3, what is the value of the gravitational acceleration at a distance 𝑑=1300.0 km from the Earth's center?

Assuming that the Earth has a uniform density 𝜌=5540.0 kg/m3, what is the value of the gravitational acceleration at a distance 𝑑=1300.0 km from the Earth's center?

02/27/23

Calculate the moles of water removed and the moles of anhydrous calcium sulfate remaining in the crucible.

In a crucible, a 1.803g sample of hydrated calcium sulfate (CaSO4 . XH2O) is heated until a constant mass is reached. The mass of the anhydrous calcium sulfate is 1.426g.
Physics

02/27/23

A 0.41 kg particle moves in an xy plane according to x(t) = - 16 + 1 t - 3 t3 and y(t) = 22 + 3 t - 10 t2, with x and y in meters and t in seconds. At t = 1.8 s,

what are (a) the magnitude and (b) the angle (within (-180°, 180°] interval relative to the positive direction of the x axis) of the net force on the particle, and (c) what is the angle of the... more
Physics

02/27/23

A bird in flight collides with the windshield of a Boeing 747 flying in the opposite direction.

A bird in flight collides with the windshield of a Boeing 747 flying in the opposite direction. Compared to the acceleration of the plane, the acceleration of the bird isSelect... more
Physics

02/24/23

AP Physics Vertical Spring Question

A 5-kilogram block is fastened to an ideal vertical spring that has a 400 N/m spring constant. When the 5kg block is at rest on top of the spring, the spring is compressed to its equilibrium... more
Physics

02/22/23

Physics Q. Potential Energy

Approximately 6.6 x 106 kg of water drops 53 m overNiagara Falls every second. How much potential energyis lost every second by the falling water?I found the PE to be 3.43*10^9 J but I can't figure... more

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