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3 years ago

3. A cart with mass of 30 kg is traveling with a velocity of 4.0 m/s. The

Physics

2 answers:

MaRussiya [10]3 years ago

8 0

Answer:

39 m/s

Explanation:

Sever21 [200]3 years ago

3 0

Answer:

39 m/s

Explanation:

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Which of the following affects the speed of a seismic wave?

NemiM [27]

Answer:

The answer is B. composition

Explanation:

The speed of a seismic wave is governed by three interrelated factors, viz. the composition of the rock, pressure, and temperature.
Seismic waves travel at different speeds in different mediums.
This property of the seismic waves tends it to change the speed where the concentration of minerals in the rocks varies.
Other than that, the increasing temperature beneath the Earth's surface decreases the speed of the seismic waves, and the speed increases with increasing pressure as the waves go penetrating deep down into the Earth's interiors.

5 0

3 years ago

A large truck breaks down out on the road and receives a push back to town by a small compact car.

Anton [14]

Answer:

A True. It agrees with Newton's third law

3 True. The car pushes the truck and goes at constant speed

Explanation:

To examine the final answers, we must silver the solution of the problem, if we see Newton's third law, action and reaction, we see that the car pushes the truck the action, the truck must oppose this force with a force applied on the car of equal magnitude, but opposite direction

In view of the above, let's review the statements.

A True. It agrees with Newton's third law

B False. Violate Newton's third law

C False violate Newton´s third law

D False. The force is exerted by the car not specifically by the engine

E Faults if no force is exerted the truck should stop due to friction

Second question

If the two vehicles move at the same speed, the resulting force on each of them must be zero

1 False. If the truck doesn't get nine, it can't go at cruising speed

2 False if the car is accelerating it cannot go at constant speed

3 True. The car pushes the truck and goes at constant speed

4 False. If the truck slows it should slow down

5 0

3 years ago

An elastic collision is one in which:

julia-pushkina [17]

Answer:

.conserves kinetic energy and momentum

.does not coalesce

.causes much lesser deformation as compared to inelastic

.the two bodies involved; after collision move with separate final velocities.

Explanation:

eg. throwing a ball at a wall

collision between a punch and your nose,haha

I guess that will cause a lot deformation..

.

7 0

3 years ago

While at a party, you pull up a sound intensity level app on your phone (everyone does stuff like that, right?), and it reads 83

allochka39001 [22]

To solve this problem it is necessary to apply the concepts related to Sound Intensity. The unit most used in the logarithmic scale is the decibel and mathematically this is expressed as

$\beta_{dB} = 10log_{10}\frac{I}{I_0}$