Alfred

This page lists questions and answers that were posted by visitors named Alfred.

Questions

The following questions were asked by visitors named Alfred.

(A) Identify how the gravitational potential energy changes as a shuttle takes off from the launch pad. (b) Explain the consequences to the space craft and its occupants if the shuttle is undergoing re-entry, and the angle of re-entry is significantly gre...

A student spins a 1.2kg rock around above her head horizontally in an experiment which aims to model how satellites orbit the earth. The student counts 3 orbits per second when the string produces an orbit radius of 35cm. (a) Calculate the centripetal for...

A very important experiment was carried out at the end of the 1800’s involving testing for the speed of the earth through the ether. (a) State the name of this experiment (b) Describe why the light beams are perpendicular to each other at one stage of the...

A dc electric motor found in the lab was being examined by a student. It was connected to a power supply and it was not attached to any load. (a) The student stated, ‘when the motor is switched on, the electrical energy input should cause the motor to sta...

(a) Identify the significance of scientists James Clerk in hertz’s research. (b) Explain the physics of why hertz was able to detect sparkling in small detector coil when the detector was located in the position shown on the diagram above. (c) Describe tw...

1. What is the weight of a 24kg mass on Mars if its surface gravitaional field = 3.5N/KG? a) 235.2 N b) 84 N c) 24 kg d) 6.86 kg 2. A space shuttle is placed in a circular orbit around the Earth. It then thrusts its engine and moves to a new orbit, as sho...

1.6 mol of Neon gas are heated from 20.0 °C to 85.2 °C at a constant pressure of 1 atm. Calculate the work done. (R = 0.082057 L.atm/ K. mol)

Ag(s) + Cl2(g) --> 2AgCl(s) ∆H and ∆S are 254.14kJ and –115.0J/K respectively. Calculate equilibrium constant, K for the reaction at 500K?

How do i graph this hyperbola? X^2+6x-3y^2=0

A golfer drives a golf ball with a velocity of 100 ft/sec and an angle of 45 degrees. A. find the time of travel for the ball. B. Find the balls range. C. Find the maximum height of the ball

I've been stuck on a problem with my homework for a couple of minutes now. We are doing Systems of Two Equations, using the substitution method. The problem is: 4y-6x+20=0 3=(18/5)x+(21/10)y

An oval track is made by erecting semi circles on each end of a 58 m by 116 m rectangle. Find the length of the track and the area enclosed by the track.

Identical squares are cut off from each corner of a rectangular piece of cardboard measuring 7cm by 12cm. The sides are then folded up to make a box with an open top. If the volume of the box is 33cm^3, what is the largest possible length of each side of...

one-half a number minus 6 is 4. find the number

A jug can hold 3 times as much juice as a mug if the jug can hold 2 L of juice how much juice in liters can the mug hold

What is the difference in meaning between the following pairs of sentences? 1. I was a teacher. 2 I am a teacher

Does anyone have a giant list of WebAssign Physics1 work with the questions?

The 4th term of an arithmetic progression AP is 37 and the 6th term is 12 more than the 4th term find. (i)the first term of AP. (ii) the seventh term of AP.

(x+1)^2-6=y Solve for x and y should be part of the final answer

Find the equation of a TANGENT line & NORMAL line to the curve of x^2+y^2=20such that the tangent line is parallel to the line 7.5x – 15y + 21 = 0

Which system(s) of the body are mainly involved in the fighting off of infection? A) Digestive System B) Cardiovascular C) Immune System D) All of the above E) A and C only

Shelly has a roll of fabric and decides to make some scarves for her friends. The roll contains 6 2 3 yards of fabric. She needs 5 6 of a yard of fabric for each scarf. How many scarves can she make?

Answers

The following answers were posted by visitors named Alfred.

Does the density of air change when it is heated in a closed container?

so the formula is W = nR∆T Thank you for the answer above:)

Let 23=x 408=y N= final answer then âˆš(23+âˆš408) - âˆš(23-âˆš408) becomes âˆš(x+âˆšy) - âˆš(x-âˆšy) Equating it to N âˆš(x+âˆšy) - âˆš(x-âˆšy)=N Solving this, N²= 2x-2âˆš(x²-y) Subsituting x=23 and y=408 N²=2(23)-2âˆš(23²-408) =46-2âˆš(529-408) =46-2âˆš...

t= √ 2y/g = √2(10m)/9.8m/s^2 = √2(10)/9.8 = 3.19 s d= 3.19s(100) = 319.4 = 319m

inverse sin--> = Sin^-1(1.46-1.48)= 80.57 deg 90-80.57 = The Max_ang = 9.43 deg

from energy= 1/2mv^2. =1/2×0.5×3^2 =2.25 but work done=force applied then force=2.25 recall f=ma =0.5×10 5N so. coefficient=kinetic frictions limiting friction 2.25÷5=0.45 coefficient of kinetic friction =0.45

1 is the answer

Please explain this question diagramatically.

Can someone answer

Percentage by mass of x in X2CO3.10H2O

I want answer your

Can't find the work done by gravity