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CheemnCatelvew 2020-10-25

Evaluate the following limits.
$lim_{(x, y, z) \to (1, 1, 1)} \frac{x - \sqrt{x z} - \sqrt{x y} + \sqrt{y z}}{x - \sqrt{x z} + \sqrt{x y} - \sqrt{y z}}$

e1s2kat26 2020-10-25

Convert. $15 p t =$ ____ c

Cheyanne Leigh 2020-10-25

A person jumps from a fourth-story window 15.0 m above a firefighter's safety net. The survivor stretches the net 1.0 m before coming to rest. (a) What was the average deceleration experienced by the survivor when slowed to rest by the net? (b)What would you do to make it "safer" (that is, generate a smaller deceleration): would you stiffen or loosen the net? Explain.

ediculeN 2020-10-25

A spring is extended by 30mm when a force of 1.5 N is applied toit. Calculate the energy stored in the spring when hangingvertically supporting a mas of 0.2kg if the spring was unstretchedbefore applying the mas calculate the loss in the potential energyof the mass.

Albarellak 2020-10-25

A water rocket, launched from the ground, rises verticallywith acceleration of 30 /s2 for 1 s when it runs out of fuel. Disregarding air resistance, how high will the rocket rise? Comments

ossidianaZ 2020-10-25

A person lying on an air mattress in the ocean rises and fallsthrough one complete cycle every five seconds. Thecrests of the wave causing the motion are 20.0m apart. Determine
a. the frequency and,
b. the speed of the wave.

Tazmin Horton 2020-10-25

An astronaut on planet zircon tosses a rock horizontally witha speed of 6.95 m/s. The rock falls thru a vertical distanceof 1.40 m and lands a horizontal distance of 8.75m from theastronaut. What is the acceleration of gravity on zircon?

Aneeka Hunt 2020-10-25

A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 4.00 m to the north, 2.00 m northeast, and 1.00 m at 30.0 degrees west of south. Starting at the same initial point, an expert golfer could make the hole in what single displacement?

foass77W 2020-10-25

A water skier has a mass of 73 kg.
(a) Find the magnitude of the net force actingon the skier when she is accelerated from rest to a speed of13 m/s in 7.1 s. N
(b) Find the magnitude of the net force acting on the skier whenshe lets go of the tow rope and glides to a halt in 24 s. N

sodni3 2020-10-23

A single constant force $F = (3 i + 5 j)$ N acts ona 4.00-kg particle. (a) Calculate the work done by this forceif the particle moves from the origin to the point having the vector position $r = (2 i - 3 j) m$ . Does thisresult depend on the path? Explain. (b) What is the speed ofthe particle at r if its speed at the origin is 4.00 m/s? (c) What is the change in the potential energy?

Wierzycaz 2020-10-23

Solve the initial value problem ${\begin{matrix} y + 16 y = \cos (4 t) \\ y (0) = 1 \\ y^{'} (0) = 1 \end{matrix}$ using the Laplace transform.

ankarskogC 2020-10-23

A compound consisting of C, H and O only, has a molar mass of 331.5g/mol. Combustion of 0.1000g of this compound caused a 0.2921g increase in the mass of the CO2 absorber and a 0.0951 g increasein the mass of the H2O absorber. What is the empirical formula ofthe compound?
What is ment by absorber ? product?

Rivka Thorpe 2020-10-23

A closed container is partially filled with water. Initially, theair above the water is at atmospheric pressure $(1.01 \times 10^{5} P a)$ and the gauge pressure at the bottom of the wateris 2500 Pa. Then additional air is pumped in, increasing thepressure of the air above the water by 1500 Pa.

Tolnaio 2020-10-23

In the vertical jump, an athlete starts from a crouch andjumps upward to reach as high as possible. Even the best athletesspend little more than 1.00 s in the air (their "hang time"). Treatthe athlete as a particle and let be his maximum height above the floor. Toexplain why he seems to hang in the air, calculate the ratio of thetime he is above /2 moving up to the time it takes him to go from thefloor to that height. You may ignore air resistance.
I think I have to use the formula $y max = \frac{1}{2 a t^{2}}$ and solve for t. So $t = \sqrt{\frac{2 y_{m a x}}{a}}$ , and then do it again when it isymax/2. But then I get stuck there.

avissidep 2020-10-23

How many of the following are found in 15.0 kmol of benzene(C6H6)?
(a) lb-mole C6H6
(b) mol (g*atom) C
(c) mol H
(d) g C
(e) g H
(f) molecules of C6H6
(g) kg C6H6
(h) mol C6H6

jernplate8 2020-10-23

18.0 kg of water per minute must be lifted by a pump through a height of 3.60 m. What wattage output rating ought the pump motor to have?
Do we do the following?
$P = m g \frac{y}{t} = \frac{(18 x 9.8 x 3.60)}{60 \sec} = 10.584 W$ ?
Thanks!

Dolly Robinson 2020-10-23

A 2 meter stick is parallel to a uniform 200N/C electricfield. the potential difference between its ends is
a)0
b) $1.6 \times 10^{- 17} V$
c) $3.2 \times 10^{- 17} V$
d)100v
e)400V

Zoe Oneal 2020-10-23

Draw resonance structures to show in which position nitrobenzene will nitrate to form dinitrobenzene.

Cheyanne Leigh 2020-10-21

A billiard ball rolling across a table at 1.65 m/s makes a head-on elastic collision with an identical ball. Find the speed of each ball after the collision when each of the following occurs.

BenoguigoliB 2020-10-21

To solve:
$(\begin{matrix} x - 2 y = 2 \\ 2 x + 3 y = 11 \\ y - 4 z = - 7 \end{matrix})$

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