Make a table or list of the major similarities & differences between the Moon & Mercury, including three major discoveries about Mercury made by Mariner 10 & three improved results found by MESSENGER. Consider just intrinsic & rotational properties, not orbital properties
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A roller-coaster track is being designed so that the roller-coaster car can safely make it around the circular vertical loop of radius R = 24.5 m on the frictionless track. The loop is immediately after the highest point in the track, which is a height h above the bottom of the loop. What is the minimum value of h for which the roller-coaster car will barely make it around the vertical loop?
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In each hand you hold a 0.17-kg apple. What is the gravitational force exerted by each apple on the other when their separation is each of the following?
(a) 0.40 m
_______ N
(b) 0.80 m
_______ N
A communications satellite with a mass of 500 kg is in a circular orbit about the Earth. The radius of the orbit is 46,000 km as measured from the center of the Earth.
(a) Calculate the weight of the satellite on the surface of the
Earth.
______ kN
(b) Calculate the gravitational force exerted on the satellite by
the Earth when it is in orbit.
______ kN
An 8.84-kg block slides with an initial speed of 1.54 m/s down a ramp inclined at an angle of 26.4
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a signal is carried by a coaxial cable. The signal is carried by an inner wire with radius R1 while an outer conductor of radius R2 is grounded. An insulating materiel is between the two.
A. Find an expression for the capacitance per meter of the coaxial cable, assuming air is between the two cylinders.
B. Find the Capacitance per meter of a cable with R1= 0.70mm and R2=2.1mm. (answer units are pF/m)
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An old piece of wood has a carbon mass of 124 g and an activity of 13 Bq. How old is the song? The radioactive isotope of natural carbon has f = 1.3⋅10−12 parts and has a half life of 5730 years. The average for the year is 3.156⋅107 seconds. Please give your answer in years (ie a).
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Four point masses each with a mass of 4.90 kg are positioned at the corners of a rectangle with dimensions 1.80 meters by 3.00 meters. Assume these are the only masses that are gravitationally relevant.
What is the magnitude of the gravitational force on a corner mass due to the other three masses?
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A) A henry inductor, a 9 ohm resistor, a .05=1/20 farad capacitor are placed in series and attached to a 9 volt battery to complete the circuit. Find the function for the charge on the circuit at time t if an initial charge of 10 coulombs and an initial response of 10 amps are applied to the circuit at time 0.
b) What is the charge on the capacitor after 1 second?
c) Plot the function for the charge on the capacitor over the first second.
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keplers third law states that the square of the period of any planets orbit is proportional to the cube of the semimajor axis of the orbit. for the following, show all your work and dont skip steps
derive the exact expression relating the period (T) and the radius (r) for a planet in circular orbit by applying newtons second law for circular motion.
the orbital period of mars in its revolution around the sun is 1.88 years what average distance from the sun does the keplers thirdlaw predict for mars?
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What is the wavelength of the matter wave associated with a proton moving at 381 m/s?
wavelength of proton matter wave: 1.04×10^9 m
What is the wavelength of the matter wave associated with a 151 kg astronaut (including her spacesuit) moving at the same speed?
wavelength of astronaut matter wave: 1.15×10^-38 m
What is the wavelength of the matter wave associated with Earth moving along its orbit around the Sun?
wavelength of Earth matter wave: ??? m
I got the first two answers by my last answer I put 1.34 x 10^-59 and it was wrong.
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A squirrel sitting on a peak of a roof which is 1.50 m above the bottom of the roof and 4.50 m above the ground puts an acorn on the roof. It starts from rest at the peak and slides down the sloped roof (coefficient of friction = 0.150) which is angled at 25.0 degrees to the horizontal. After the acorn reaches the edge of the roof it flies off and becomes a projectile. You may ignore air resistance. Part A what is the acorn's acceleration as it slides down the rood? PArt B Find the velocity of the acorn at the edge of the roof? Part C How long after the acorn left the roof does is hit the ground? PArt E How far from the side of the house does the acorn hit the ground?
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A particular human hair has a Young's modulus of 3.77×109 N/m2and a diameter of 146 μm.
If a 256 g object is suspended by the single strand of hair that is originally 15.5 cmlong, by how much ΔL hair
will the hair stretch?
If the same object were hung from an aluminum wire of the same dimensions as the hair, by how much ΔLAl
would the aluminum stretch?
If the strand of hair is modeled as a spring, what is its spring constant khair?
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What is the quark designation of a neutron?
| a. |
uud. |
|
| b. |
ddd. |
|
| c. |
uuu. |
|
| d. |
udd. |
|
| e. |
ucb. |
What happens to nuclei that have too many neutrons?
| a. |
Extra neutrons β+-decay and turn into protons. |
|
| b. |
Extra neutrons α-decay and leave the nucleus. |
|
| c. |
Extra neutrons β−-decay and turn into protons. |
|
| d. |
Extra neutrons n-decay and leave the nucleus. |
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377 g of water at 81°C & 279 g of glycerin at 47°C
are poured into a 427 g copper cup at 58°C. Assuming these three
make up a closed (or isolated) system, determine the FINAL
TEMPERATURE of the system.
A cube of ice is taken from the freezer at -9.4°C and
placed in a 100 g aluminum calorimeter filled with 278 g of water
at room temperature of 20°C. The final situation is observed to be
all water at 15°C. What was the mass of the ice
cube?
274 g of water at 2°C is added to ice at 0°C. If the
final temperature of the system (which you can assume is isolated)
is 0°C, determine HOW MUCH ICE MELTED.
0.4 kg of steam at 100°C is added to 2.74 kg of ice at
0°C. Determine the temperature of the mixture once thermal
equilibrium is reached.
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1) a car of mass 999 kg traveling at 72.0 km/hour enters a flat(non-banked) and dry curve of radius 97.4 m. What is the coefficient of static friction between the tires and the road required to prevent the car from slipping ?
2) Shirin pushes a 27.1 kg crate a distance of 8.65 m along a level floor at constant velocity by pushing downward at an angle of 32.0 below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.370.
a) what magnitude of force must Shirin apply to move the crate at constant velocity ?
b) how much work does Shirin do on the crate, when it is pushed this distance of 8.65 m?
3.) A soccer ball with mass 0.880 kg is initially moving with speed 1.55 m/s. Marcus Rashford kicks the ball, exerting a constant force of magnitude 97.0 N in the same direction as the ball's motion. Over what distance must Marcus's foot be in contact with the ball to increase the ball's speed to 8.33 m/s ?
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Before Fuel Injection. Some automobile engines (mainly older ones) use a carburetor to turn the liquid fuel into vapor and mix it with air for combustion. The basic principle of carburetion is shown in Figure P10.82. A piston moves down in the cylinder thereby moving air from the outside through the carburetor by way of an air filter and into the carburetor. The filtered air enters from the left of Figure P10.82 and moves into the main intake, a tube of diameter 4.2 cm, with velocity v = 10 m/s. The air must pass through a region of the intake that has a smaller diameter. Determine what diameter would be needed cause a change in pressure such that fuel from the reservoir is pulled into the airflow. The surface of the fuel in the reservoir is h = 37 cm below the bottom of the intake and the density of the fuel is 0.45 that of water. Use 1000 kg/m^3 for the density of water and 1.29 kg/m^3 for the density of air
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