Physics

A football is punt 50ft above ground with a hang time of 4.0 s and a horizontal distance of 40 yd.

What is the magnitude and direction of the initial velocity?g= 32.2 ft/s^2.-We know that the ball hits the ground after 4.0 seconds by the definition of hang time. If the initial VERTICAL velocity of

If Mary rows straight north, where will she land

Mary needs to row her boat across a 50 m-wide river that is flowing to the east at a speed of 3.0 m/s . Mary can row with a speed of 3.0 m/s. If Mary rows straight north, where will she land?-draw it

Newton's third law question

Two blocks, with masses m1=4.6 kg and m2=3.8 kg, are connected by a light spring on a horizontal frictionless table.At a certain instant, when m2 has an acceleration a2=2.6 m/s^2, (a) what is the forc

What direction does heat flow between two objects of different temperatures

the heat flows to the object with the lowest temperature-Since there is a temperature gradient from higher temperature domain to lower temperature domain, therefore direction of heat flow is from high

Physics question, how much wait can a blimp hold

The Goodyear blimp Columbia is filled with 5740 m3 of helium with density ρ=0.18 kg/m3. The ship has a mass of 5430 kg when empty, and the crew for a given flight has a mass of 286 kg. How much payloa

Vector addition and subtraction

In general it is best to conceptualize vectors as arrows in space, and then to make calculations with them using their components. (You must first specify a coordinate system in order to find the comp

Physics - Motion problem

A proton initially hasV = (18)i + (5.6)j + (14)k and then 3.7 s later has V= (-15)i+ (5.6)j+ (15)k(in meters per second). (a) For that 3.7 s, what is the protons average acceleration in unit vector no

Find the suface area of the closed circuar cylinder shown

r=5 h=6=h-cylinder A = 2πr² + 2πrh A = 2π5² + 2π(5)(6) = 110π

Find the surface area of the sphere shown r=8

is that radius? sphereA = 4πr² = 4π(8)²

Physics : Normalize the wave function

Normalize the wave function: Ψ (x) = C / (a^2 + x^2) and find the expectation values of x and x^2 for this wave function. Can someone point me in the right direction?-Assuming we talk about quant

Physics ball problem

A tennis ball is dropped from 1.71mabove the ground. It rebounds to a height of 0.874 m. acceleration of gravity=9.8 m/s^2 (down is negative) If the tennis ball were in contact with the ground for 0.

Convert 8.76 * 10^7 mW to gigawatts

8.76e7 mW = 8.76e4 W (move decimal point 3 places to right) 8.76e4 W = 8.76e1 kW 8.76e1 kW = 8.76e-2 MW 8.76e-2 MW = 8.76e-5 GW or you can just divide by 1e12 8.76e7 mW / ( 1e12 mW/GW) = 8.76e-5 GW

Physics question with a parachutist

A parachutist loses one of her shoes at an altitude of 50 m while descending at a constant speed of 10 m/s. Neglecting air resistance for the shoe: 1) How long does it take for the shoe to hit the gr

The velocity as a function of time for a car on an amusement park ride is given as v=At^2 + Bt with constants

Im terrible with integration, please help! The velocity as a function of time for a car on an amusement park ride is given as v=At^2 + Bt with constants A=1.0m/s^3 and B=2.0m/s^2. If the car starts a

Physics Velocity and Displacement Question

A baseball is hit straight up in the air with a speed of 22 m/s. How high does it go? How long is it in the air?-In this problem, v=0, u=22, g=-9.8 v=u-gt 0=22-(9.8) t t=22/9.8 = 2.24 seconds -2gs=v