3 years ago

4-7 Please! This is about scientific experiments.

Physics

1 answer:

ladessa [460]3 years ago

8 0

Number 4 is c , number 5 is a , number 6 is d and 7 is a

You might be interested in

Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical

Vadim26 [7]

Answer:

2 1 1

Explanation:

8 0

2 years ago

How does an object's acceleration change if the net

topjm [15]

C.the acceleration is doubled

5 0

2 years ago

How would you find the average speed of a cyclist throughout an entire race

pishuonlain [190]

Velocity, you divide distance/time

4 0

2 years ago

A boy pushes a cart with a constant velocity of 0.5m/s by applying a force of 60 N. What is the total frictional force acting on

Nutka1998 [239]

Answer:

60N

Explanation:

in this case the minimum amount of force required must be equal to the friction Force. i.e Newton's first law of motion.

therefore the maximum amount of frictional force is equal to the applied force which is 60N.

because of the net force acting on the object is zero the object is in constant motion . i.e equal and opposite force must be applied so that the object is in constant velocity therefore the total frictional force must be 60N

8 0

3 years ago

In one cycle, a heat engine takes in 1000 J of heat from a high-temperature reservoir, releases 600 J of heat to a lower-tempera

Talja [164]

Answer:

η = 40 %

Explanation:

Given that

Qa ,Heat addition= 1000 J

Qr,Heat rejection= 600 J

Work done ,W= 400 J

We know that ,efficiency of a engine given as

$\eta=\dfrac{W(net)}{Q(heat\ addition)}$

Now by putting the values in the above equation ,then we get

$\eta=\dfrac{400}{1000}$

η = 0.4

The efficiency in percentage is given as

η = 0.4 x 100 %

η = 40 %

Therefore the answer will be 40%.

4 0

3 years ago