1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sidana [21]
3 years ago
11

I need help for a review sheet

Physics
1 answer:
siniylev [52]3 years ago
3 0
Tin is Sn, atomic number 47 is Silver, Mass of sodium is 22.9 u
You might be interested in
Two billiard balls having the same mass and speed roll directly toward each other. What is their combined momentum after they me
stealth61 [152]
Their combined momentum after they meet is 0 .
3 0
2 years ago
If a circuit has a power of 50 W with a current of 4.5 A, what is the resistance in the circuit?
lawyer [7]

Answer:

{ \rm{power, \: p = current \times p.d}} \\ { \rm{50 = 4.5 \times (current \times resistance)}} \\ { \rm{50 = 4.5 \times (4.5 \times r)}} \\ { \rm{resistance =  \frac{50}{ {4.5}^{2} } }} \\  \\ { \rm{resistance = 2.5 \:  ohms}}

8 0
2 years ago
Gulls are often observed dropping clams and other shellfish from a height to the rocks below, as a means of opening the shells.
kumpel [21]

Answer:

v = 17.71 m / s

Explanation:

We can work this exercise with the kinematics equations. In general the body is released so that its initial velocity is zero, the acceleration of the acceleration of gravity

                v² = v₀² - 2 g (y -y₀)

                v² = 0 - 2g (y -y₀)

when it hits the stone the height is zero and part of the height of the seagull I

              v² = 2g y₀

              v = Ra (2g i)

let's calculate

              v =√ (2 9.8 16)

              v = 17.71 m / s

8 0
3 years ago
Evaluate A car company wants to build a wind-powered car that converts 100 percent of the mechanical energy in the wind to the m
lorasvet [3.4K]

Answer:

There's one or two reasons, depending on what is meant by "wind-powered car".

The first reason is that it's impossible for any transfer of energy to be 100% efficient.  There will always be frictional losses.

Secondly, if the company means that they want to attach a wind turbine to the car so that the car is powered by the same wind that it generates, that violates the conservation of energy.

4 0
3 years ago
With what velocity Must a 0.53 kg softball be moving to be equal to the momentum of a 0.31 kg baseball moving at 21 m/s
vladimir2022 [97]

Answer:12.28m/s

Explanation:

momentum of baseball =mass of baseball x velocity of baseball

Momentum of baseball =0.31x21

Momentum of baseball =6.51kgm/s

For a softball to have same momentum with the baseball we can say :momentum of baseball =mass of softball x velocity of softball

6.51=0.53 x velocity of softball

Velocity of softball =6.51/0.53

Velocity of softball =12.28m/s

3 0
3 years ago
Other questions:
  • A nurse counts 66 heartbeats in one minute. What is the period of the hearts oscillation? In minutes
    12·1 answer
  • What star is s red in color and extremely bright
    5·1 answer
  • How many star are thier in the universe​
    9·1 answer
  • Force is measured in units called
    9·2 answers
  • What type of energy depends upon an object mass and the object speed?
    8·1 answer
  • What is the momentum of a bird with a mass of 0.015 kg flying 12 m/s?
    14·1 answer
  • calculate the mass of air in a room if the floor dimensions are 10m × 12m and height is 400 cm the density of air is 1 .26 kg/M³
    7·1 answer
  • Which graph best represents the relationship between the conductivity and the temperature of semiconductors ?​
    14·2 answers
  • An 800 kg car is parked next to a 1000 kg car. Their centers of mass are 3.5 m apart. Find the gravitational force between them.
    6·1 answer
  • An electron moves in a circular path in a region os space filled with a uniform magnetic field B= 0.4 T. to double the radius of
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!