Question

What current would be required to lift a 1.0 g mass using the force balance? (Assume the circuit doesnt overheat) Is it practical to use a device like the force balance to levitate a person?

Answer #1

a) How many helium-filled balloons would it take to lift a
person? Assume the person has a mass of 67 kgkg and that each
helium-filled balloon is spherical with a diameter of 33 cmcm.
Express your answer using two significant figures.
b) After landing on an unfamiliar planet, a space explorer
constructs a simple pendulum of length 55.0 cmcm . The explorer
finds that the pendulum completes 102 full swing cycles in a time
of 128 ss . What is...

A car lift in a garage uses incompressible oil. A small input
piston of radius 4.00 cm is connected to a large piston of radius
16.00 cm via a sealed chamber. The large piston is connected to a
platform on which rests a car. The combined mass of the platform
and car is 1500 kg.
(a) What is the minimum force required at the input piston to
begin to raise the car?
(b)What pressure is exerted at the small piston...

What mass of sodium borohydride (assuming no side reactions)
would be required for the complete reduction of 5.00g of
cyclohexanone? The density of cyclohexanone is 0.95g/mL Mass of
cyclohexanone is 100.2 g/mol Mass of sodium borohydride is 37.83
g/mol.
The above is from the reduction reaction using NaBH4
to reduce cyclohexanone to cyclohexanol.

What mass of oxygen is required for complete combustion (to CO2
and H2O) of 227 g of butane. Using balanced equation 2C4H10 +
13O2---> 8 CO2 + 10 H2O.

What would be the
length of the takeoff run (ft)?
GIVEN INFORMATION:
Use "g" = 32.2 ft / s2
1 knot = 1.69 ft / s
Gross Weight = 20,000 pounds
Average Drag = 1,500 pounds
Average Friction Force = 500 pounds
Average Thrust = 10,000 pounds
Lift Off Speed = 130 KTAS

A uniform rod of mass mr = 173 g and length L = 1... A uniform
rod of mass mr = 173 g and length L = 100.0 cm is attached to the
wall with a pin as shown. Cords are attached to the rod at the r1 =
10.0 cm and r2 = 90.0 cm mark, passed over pulleys, and masses of
m1 = 246 g and m2 = 127 g are attached. Your TA asks you to
determine...

What mass of water in kg would remain in the container after
200. g of NaCl was added to the 1.00 L of water in a 1.00 L
container? (Assume the density of water is 1.00 g/mL)

In the following reaction, what mass of mercury(II) oxide, HgO,
would be required to produce 199 L of oxygen, O2, measured at
STP?
2HgO(s) --> 2Hg(s)+O2(g)

Consider the following chemical reaction: 2H2O(l)→2H2(g)+O2(g)
What mass of H2O is required to form 1.5 L of O2 at a temperature
of 325 K and a pressure of 0.946 atm ? Express your answer using
two significant figures.

A Cr3+(aq) solution is electrolyzed, using a
current of 7.80 A .
1. What mass of Cr(s) is plated out after 1.50 days?
2.What amperage is required to plate out 0.200 mol Cr from a Cr3+
solution in a period of 7.00 h ?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago